15th Rencontres du Vietnam Perspectives in Physics ICISE, Quy Nhon, Vietnam September 22-28, 2019 Booklet of abstracts

Version of September 13, 2019

1 1 Kaonic hydrogen and deuterium from SIDDHARTA

Claude AMSLER Stefan Meyer Institute for Subatomic Physics, Vienna [email protected] Data on the KN interaction very close to threshold (e.g., from kaonic atoms) pro- vides information on the interplay between spontaneous and explicit chiral symmetry breaking in low energy QCD. Kaonic hydrogen was investigated with unprecedented precision by the SIDDHARTA experiment at the DAφNE - of LNF (Frascati), which delivers very low energy charged from the decay of the φ resonance. The shift and broadening of the ground state were mea- − sured, from which the s-wave K p scattering length a = 1/2(a0+a1) was derived, where a0 (a1) are the two isoscalar (isovector) components. To determine the two contributions separately, measurements of the shift and width of the 1s kaonic deuterium atom are re- quired. This is one of the most important missing information on the low-energy KN interaction. The approved experiment SIDDHARTA-2 at LNF intends to measure the transition X-rays to the ground state of kaonic deuterium. Challenging are the very small X-ray yields, the even larger widths compared to hydrogen, and the high radiation environ- ment. Data are not available so far (apart from an exploratory experiment performed at DAφNE in 2013). We are developing large area X-ray detectors by optimizing the signal-over-noise ratio, improving on the timing capability and implementing charge particle tracking and veto devices. Installation of the SIDDHARTA-2 apparatus has started in spring 2019. A data-taking period of about 6 months is planned in 2020. An integrated luminosity of 800 pb−1 is required to reach the goals of 30 eV uncertainty on the 1s level shift and 75 eV on its width. The final results of SIDDHARTA on kaonic hydrogen will be summarized. The physics impact of the kaonic deuterium project will be discussed, and the current status of SIDDHARTA-2 presented.

2 Decoding the phase structure of QCD with high energy nuclear collisions

Peter BRAUN-MUNZINGER EMMI/GSI Darmstadt [email protected] In this talk we demonstrate that the phase structure of strongly interacting matter can be decoded via analysis of particle production in high energy nuclear collisions. This is achieved by making use of the observed thermalization pattern of particle abun- dances within the framework of the statistical hadronization approach at various colli- sion energies. The thermalization holds not only for hadronic constituents composed of

1 light quarks but also for light, loosely bound nuclei. The observed energy dependence of the production yields and fluctuations of different particle species contains charac- teristic features which are used to determine the temperature and baryo-chemical po- tential of the matter produced. Furthermore, we demonstrate how charm quarks can be included into the analysis . This can be used to provide information on the degree of deconfinement in the fireball. The above observations imply quark-hadron duality at the QCD phase boundary and establish the first experimental delineation of the location of the phase change in strongly interacting matter. New experimental opportunities for relativistic nuclear collisions are pointed out for the near and longer term future.

3 Structure of the charmed baryons through an electro- magnetic perspective

Kadir-Utku CAN RIKEN, Japan [email protected] In this talk, we investigate the electromagnetic properties of the charmed baryons with a focus on our lattice QCD calculations. By comparing the different sectors, such as the spin-1/2 baryons to the spin-3/2 ones or the singly charmed to the doubly charmed baryons, we reveal the inner dynamics and the characteristics of the charmed baryons. We comment on the tension between our lattice determinations and the results obtained via other methods, and discuss the possible reasons.

4 Recent Results from GlueX

Mark DALTON Jefferson Lab (For the GlueX Collaboration) [email protected] The GlueX Experiment at Jefferson Lab uses a 9 GeV linearly polarized photon beam incident on a liquid hydrogen target and a solenoidal spectrometer providing nearly complete coverage for charged and neutral particles. GlueX has completed phase 1 of data taking having acquired many orders of magnitude more photo-production data than previously available. The ultimate goal is to search for and map the spectrum of light hybrid mesons. Towards this goal, polarization observables, spin density matrix elements (SDMEs), and cross-sections of mesons are being measured in order to un- derstand their production mechanisms. This talk will discuss the recent results from GlueX.

2 5 spin structure from large to small distances

Alexandre DEUR Jefferson Lab [email protected] We will summarize the measurements investigating the nucleon longitudinal spin structure. After motivating its study, we will discuss the recent experimental data, in particular that at large distance, and what they teach us. The experimental data have now provided a precise mapping of the nucleon longitudinal spin structure from large to small distances. This achievement went in hand with important theoretical advances such as improvements in Chiral Perturbation Theory, the perspective for lattice QCD to compute structure functions, or the application of Light–Front Holographic QCD to the nucleon spin structure.

6 Hadron structure results from COMPASS and plans for AMBER

Celso FRANCO LIP-Lisbon, Portugal [email protected] The COMPASS experiment at CERN is one of the leading experiments studying the structure. In what concerns the spin and momentum dependence of the par- ton distribution functions COMPASS has been performing several measurements, since 2002, using the following processes: deep inelastic scattering of polarised muons off lon- gitudinally and transversely polarised NH3 and 6LiD targets and also the -induced Drell-Yan reaction in a transversely polarised NH3 target. An overview of the COM- PASS results on this topic will be presented. A proposal for a new CERN experiment on hadron structure and spectroscopy with extended scientific scope with respect to COM- PASS, the AMBER project, will also be discussed. Namely, the planned measurements on the pion and structure will be presented.

7 On non-conformal models for bottom-up holographic QCD

Anastasia GOLUBTSOVA Joint Institute for Nuclear Research [email protected] Recent years holographic duality has been tremendously successful in giving deep insights into strongly coupled QCD, in particular physics of quark-gluon plasma. In

3 this talk I will focus on the bottom-up models that can implement holographically the renormalization group flow of QCD at zero and finite temperatures. These models can be studied analytically while having features resembling the real QCD, in particular reproducing the QCD running coupling. I will consider estimations for heavy quark potential and drag force of a moving quark in the holographic backgrounds. The gen- eralization of the models to the case of finite baryonic density will be also discussed.

8 Light-meson spectroscopy at COMPASS

Boris GRUBE Technische Universiät München [email protected] The excitation spectrum of light mesons, which are composed of up, down, and strange quarks, is studied since decades. However, it still holds a number of puzzles and surprises that provide new insights into the nature of the strong interaction. Recent high-quality data samples from the COMPASS experiment at CERN allow us to not only study the properties of established mesons with unprecedented precision but to also search for new states. These searches in particular aim to resolve the question of the existence of so-called exotic states, such as four-quark states or states with excited gluon fields. Since light mesons have often large widths and are overlapping, the mapping of their spectrum is challenging and requires large quantities of data. The data are analyzed using a framework of interfering quantum amplitudes known as partial-wave analysis (PWA). Most excited meson states decay into multi-particle final states, for which the PWA requires extensive modeling of the dynamics of the final-state . In this talk, I will give an overview of the ongoing experimental studies of light mesons at COMPASS. I will also touch on novel analysis techniques and the prospects for future progress.

9 Five–body structure of ssscc¯ system

Emiko HIYAMA Kyushu Univ./RIKEN [email protected] We introduce the structure of ssscc¯ system which has never been observed, within the framework of the constituent quark model. Then, we will discuss whether or not we have compact sharp resonant states which are genuine pentaquark systems.

4 10 Pc as heavy hadronic molecules with pion exchange force

Atsushi HOSAKA RCNP, Osaka University [email protected]

We study recently observed Pcas hadronic molecules, presenting how a simple model with pion exchange force can describe the LHCb data for masses and widths. The role of the tensor force is analyzed, and we discuss its importance in the formation of the molecules.

11 Status of Λ(1405) in chiral dynamics

Tetsuo HYODO Tokyo Metropolitan University [email protected] We introduce the current status of the Lambda(1405) resonance in chiral SU(3) dy- namics. Whole set of low-energy experimental data around the K−p threshold, includ- ing the recent precise measurement of the kaonic hydrogen, can be described in the framework of the NLO chiral SU(3) dynamics. We show the determination of the pole structure in the Λ(1405)region, and then discuss the internal structure of the Λ(1405).

12 Study of KN¯ interaction from the hadron-hadron cor- relation in high-energy nuclear collisions

Yuki KAMIYA Institute of Theoretical Physics, Beijing [email protected] We discuss the KN¯ correlation in high-energy nuclear collisions and its relation to the KN¯ interaction. Given the relative distance distribution of KN¯ pair at freeze-out, the hadron-hadron correlation can be useful to investigate the hadron interaction. Re- cently, it has been shown by the ALICE collaboration that the effect of the threshold difference due to the isospin symmetry breaking is important for more detailed deter- mination of the KN¯ interaction. In this study, we construct the method to calculate the correlation including all the effects of coupled- channel, Coulomb force and the thresh- old difference. With the results of the K−p correlation calculated using the local po- tential constructed based on chiral dynamics, we show the significance of taking these effects into account and we discuss the low energy region of KN¯ interaction.

5 13 Structure of singly heavy baryons in a pion mean-field approach

Hyun-Chul KIM Inha University [email protected] In the present talk, we review a series of recent works on the structure of singly heavy baryons, based on a pion mean-field approach or also known as the chiral quark- soliton model. In the large Nc limit and in the limit of infinitely heavy quark mass, a singly heavy baryon can be viewed as Nc − 1 valence quarks bound by the pion mean field that is created by the valence quarks self-consistently, where as the heavy quark can be considered as a static color source. We first examine the mass spectra of singly heavy baryons. We then present the results of the electromagnetic form factors of the heavy baryons. We discuss the physical implications of the results. We also present the predictions of the heavy pentaquarks belonging to the baryon anti-decapentaplet.

14 mixing framework for the two light-meson nonets

Hungchong KIM Korea Aerospace University [email protected] We propose a tetraquark mixing framework for the two light-meson nonets in the P + ∗ J = 0 channel, the light nonet f0(500), f0(980), a0(980), K0 (800), and the heavy ∗ nonet f0(1370), f0(1500), a0(1450), K0 (1430). According to this framework, one can in- troduce two types of tetraquark with different spin configuration, |J, J12,J34i = |000i, |011i,where J is the spin of the tetraquark, J12 the diquark spin,J34 the antidiquark spin. They differ by the color configuration also but both have the same flavor structure. The two tetraquark types seem to have interesting correspondence with the two nonets in PDG. Indeed, the two mix strongly through the hyperfine color-spin inter- action and the eigenstates that diagonalize the hyperfine masses can be identified with the two nonets in PDG. We report that their hyperfine mass splitting can generate the mass gap between the two nonets qualitatively. We also discuss interesting signatures in the decays of these tetraquarks.

15 φ meson in nuclear medium

Hyungjoo KIM APCTP

6 [email protected] The modification of light vector meson in nuclear medium is closely related to the partial restoration of the chiral symmetry. In recent years, φ meson has received partic- ular attention because more detailed measurements about its in-medium properties are being planned in the E16 experiment at J-PARC. In vacuum longitudinal and transverse polarization states of φ meson are degenerated. In nuclear medium, however, finite mo- mentum of φ meson makes two polarization sates distinct because Lorentz symmetry is broken. Therefore, the spectral function will receive non-trivial effect from finite mo- mentum in addition to the possible vacuum mass shift in nuclear medium. To study this effect, we employed QCD sum rules for two polarization states separately while keeping all momentum dependence.

16 Generalized distribution amplitudes and gravitational form factors of hadrons

Shunzo KUMANO KEK/J-PARC shunzo.kumano@.jp Form factors given by matrix elements of quark and gluon energy-momentum ten- sors are conventionally called gravitational form factors because they are sources of gravity in hadrons. They are investigated by generalized parton distributions (GPDs) and their s-t crossed ones, generalized distribution amplitudes (GDAs). We analyzed the KEKB data on two photon process, gamma* + gamma -> pi0 + pi0, for producing the pion pair. Including resonance effects of f2(1270) and f0(500) and the GDA contin- uum in our formalism and analyzing the KEKB data, we obtained the pion GDAs. From them, the timelike and spacelike gravitational form factors are calculated for the pion [1]. From the form factors, we determined the mass and mechanical radii as 0.32-0.39 fm and 0.82-0.88 fm, respectively. The mass radius is smaller than the experimental pion- charge radius 0.672+-0.008 fm and the mechanical one is slightly larger. In this talk, I discuss the results in Ref.[1] together with related studies by other groups. [1] S. Kumano, Q. T. Song, and O. V. Teryaev, Phys. Rev. D 97 (2018) 014020.

17 Anh Ky

18 Lattice Insights into Hadron Structure

Derek LEINWEBER University of Adelaide [email protected]

7 How well do traditional quark model ideas capture the internal structure of hadronic excitations? Does the idea of placing a constituent quark in a P-orbital excitation cap- ture the essence of low-lying odd-parity nucleon structure? Through a combination of first-principles lattice QCD simulations and modern effective field theory techniques, questions like these are finally being resolved. This presentation will focus on recent ad- vances in understanding the internal structure of baryon excitations, celebrating quark model successes and challenging some long-held beliefs. Our formalism and techniques are introduced in the context of the Λ(1405) baryon resonance where the existence of molecular meson-baryon bound-states in QCD is manifest. We’ll then examine the low- lying odd-parity nucleon resonances where new methods are enabling the first quantita- tive examinations of the electromagnetic structure of states associated with the N ∗(1535) and N ∗(1650) resonances. Finally we’ll examine the Roper resonance, highlighting new results on the role of chiral symmetry in the nucleon spectrum observed in lattice QCD simulations. Drawing on recent advances in effective field theory, the connection be- tween these lattice QCD results and experiment is established, revealing the underlying structure of the Roper resonance.

19 Future e+e− at the Energy Frontier

Tadeusz LESIAK Institute of Nuclear Physics Polish Academy of Sciences (IFJ PAN) [email protected] A new giant electron-positron collider, operating at energy frontier, is a natural pro- posal in order to push into new regime of precise measurements, in particular in the sectors of electroweak observables and Higgs boson parameters. The four projects of such accelerators: two linear (ILC and CLIC) and two circular (FCC and CEPC) are currently in various stages of development. The next few years will be critical as far the decisions about the construction of such colliders, in particular in view of the update of European HEP strategy and expectations of important decisions from Japan, China and USA. The talk will discuss the motivation and very attractive physics program for new e+e− colliders, spanning in particular perspectives in Higgs, electroweak and flavour sectors together with expectations of searches for New Physics. Special attention is given to the relevant QCD measurements and hadron spectroscopy. The main aspects and challenges of the accelerators and detectors together with the proposed schedules of construction and operation.

20 Weak decay of heavy flavors

Cai-Dan LÜ IHEP, Beijing

8 [email protected]

The heavy flavor hadrons (D and B mesons) can only decay via weak interaction. But their theoretical calculations involve strong interaction, especially the non-perturbative dynamics. We apply the factorization theorem to these decays, to extract the non- perturbative contributions by fitting the experimental data of branching ratios and CP violation observables. With these as input, we then predict other decay observables for future experiments.

21 Nuclear structure in the QMC model

Kay-Marie MARTINEZ University of Adelaide [email protected] The Quark-Meson Coupling (QMC) model provides a quark-level treatment in un- derstanding nuclear structure such that nucleon-nucleon interaction is described self- consistently through their exchange of mesons. The model has been applied success- fully to nuclear matter and finite nuclei in the Hartree-Fock + BCS approximation. Re- cently, the model was developed to include higher density dependence in the energy density functional. A derivative-free optimization algorithm has been employed to de- termine the set of parameters for this new version, QMCπ-II, along with their errors and correlations. Nuclear matter properties for this version are within the expected range of values. Various ground state observables for finite nuclei were computed and shown to be at the level of other model predictions even with fewer adjustable QMC parameters. QMC predictions for binding energies and charge radii for even-even nuclei across the nuclear chart are in good agreement with available data from experiment.

22 Heavy four and six quark states from lattice QCD

Nilmani MATHUR Tata Institute of Fundamental Research, Mumbai, India [email protected] Recently there has been tremendous interest in studying multiquark states. Lattice QCD studies are providing significant inputs in such studies. I will discuss recent lattice QCD studies on four and six quark states with one or more heavy quark contents.

9 23 Simultaneous QCD analysis of parton distributions

Wally MELNITCHOUK Jefferson Lab [email protected] We perform the first simultaneous extraction of unpolarized parton distributions and fragmentation functions from a Monte Carlo analysis of inclusive and semi- inclu- sive deep-inelastic scattering, Drell-Yan lepton-pair production, and single- inclusive e+e− annihilation data. Inclusion of the semi-inclusive data reveals a strong suppres- sion of the strange quark distribution at parton momentum fractions x ∼ 0.01, in con- trast with the ATLAS observation of enhanced strangeness in weak-boson production at the LHC. Our analysis reveals significant correlations between the strange quark den- sity and the strange → kaon fragmentation function needed to simultaneously describe semi-inclusive kaon production inclusive kaon spectra in e+e− annihilation, as well as between the strange and light antiquark densities in the proton.

24 Studies of the Charmonium System at BES III

Ryan MITCHELL University of Indiana (USA) [email protected] The BES III experiment at the Institute of High Energy Physics in Beijing, China uses e+e− collisions to produce and study a wide spectrum of states within the charmonium system. I will review recent progress in the study of the charmonium system, which ranges from detailed measurements ofJ/ψ and ψ(2S) decays to exploratory studies of the heavy charmonium states above open-charm threshold.

25 Neutron Stars, Hadrons, and High Density QCD

Theo MOTTA Adelaide University [email protected] Neutron stars are perfect laboratories to probe high density nuclear matter. With a core density of between 6 to 9 times the density of nuclei, many interesting physics comes into play. From the structure of the hadron and how it changes with baryon density to complete deconfinement of quarks and gluons, what happens at the core of neutron stars helps us understand the most elusive aspects of QCD. In this talk I will present an introduction to the nuclear astrophysics of neutron stars and the most latent open questions of the field. Furthermore, I will briefly outline how the quark-meson coupling model proposes a clear picture of what happens with the hadrons at such high

10 densities, and what it predicts for the macroscopic properties of neutron stars from the microscopic interactions of baryons and mesons.

26 Deeply Virtual Compton Scattering off the neutron

Carlos MUNOZ CAMACHO IPN-Orsay, CNRS/IN2P3 (France) [email protected] The best way to probe the three dimensional structure of ( and neu- trons) is through the so-called Deeply Virtual Compton Scattering (DVCS), where a high energy electron is scattered off a nucleon which in turns emits a high energy photon. This photon is produced by one of the quarks inside the nucleon and carries informa- tion about its transverse position and longitudinal momentum. However, the photon, having no flavor, cannot tell about the nature (up or down) of the quark that emitted it. We will present the first observation of DVCS off a neutron. Thanks to the approx- imate isospin symmetry of QCD, combining our measurements with previous ones off the proton, we can individually pin down different quark flavors inside the nucleon. In particular, our findings indicate a significantly different 3D distribution of unpolarized up and down quarks inside a transversely polarized nucleon. This work opens a new avenue in the imaging of subatomic particles by allowing to probe their flavor content.

27 Production of charmed baryons at J-PARC

Hiroyuki NOUMI Research Center for Nuclear Physics, Osaka Univ./Institute of Particle and Nuclear Studies, KEK [email protected] "How are hadrons formed from quarks?" is an important issue in hadron physics, which is the most fundamental, unsolved question in matter evolution in the universe. Since quarks are confined in hadron, spectroscopic studies of excited hadrons are of vital importance to insight the hadrons. Heavy quarks play a role to revail internal motions of hadrons. Let us consider a baryon containing a heavy quark and two light quarks. Then, collective motion of the light quark pair to the heavy quark and relative motion between the light quarks are kinematically separated due to mass difference of constituent quarks. Correlation between light quarks (di-quark correlation) is expected to be singled out. Such internal correlation would be revealed though systematic in- vestigation of level structure (excited energies), production rates, and decay branching ratios of excited baryons with heavy quarks. We are constructing a high-momentum beam line in the J-PARC Hadron Experi- mental Facility. The beam line is expected to deliver intense pion beams as high as 107

11 per second up to 20 GeV/c. We have proposed an experimental research on charmed ∗ ∗− ∗ baryons (Yc ) via the p(π−,D )Yc reactions. Current status of the experiment and re- lated activities will be presented.

28 Wilson loop in exact holographic RG flows at zero and finite temperature

Hoang Vu NGUYEN BLTP-JINR, Dubna, Russia [email protected] We estimate timelike Wilson loops at long distances in the exact renormalization group flow in the framework of the gravity dual theory. We consider the 5d holographic model with a dilaton potential.

29 Heavy-Light Tetraquark as Efimov State

Maciej NOWAK Jagiellonian University (Poland) [email protected] The hadrons built from light and heavy quarks exhibit several unique features, since their interaction is simultaneously restricted by the spontaneous breakdown of the chi- ral symmetry of light components and from heavy quark spin symmetries. This com- bination leads to the phenomenon of chiral doubling of heavy light hadrons, and to the possibility of exotics (molecules, pentaquarks). The traditional scenario for the chi- ral dynamics of heavy-light hadrons can be nowadays enriched using the holographic picture, which additionally takes into account strong coupling (confinement). Using the analogy to known chiral dynamics we point out, that not only the holographic concepts agree with the standard phenomenology, but they lead in a natural and self- consistent way to new states composed from the very strongly bound quarks, of the type of open-heavy flavor genuine tetraquark HHL¯L¯, in agreement with some predic- tions based on the quark model. The uniqueness of this state in the holographic scenario stems from the fact, that this is perhaps the first appearance in the hadronic world of so-called Efimov bound state. This presentation is based on the recent work (Heavy Holographic Exotics: Tetraquarks as Efimov States, by Y. Liu, M.A. Nowak and I. Za- hed (hep-ph/1904.05189v2 and references therein).

12 30 The heavy-quark symmetry partners of the LHCb pen- taquark trio

Manuel PAVON VALDERRAMA Beihang University [email protected] A recent analysis by the LHCb collaboration suggests the existence of three narrow pentaquark-like states — the Pc(4312),Pc(4440) and Pc(4457) — instead of just one in ¯ the previous analysis (the Pc(4450)). The closeness of the Pc(4312) to the DΣc thresh- ¯ ∗ old and the Pc(4440)/Pc(4457) to the D Σc one suggests a molecular interpretation of these resonances. We show that these three pentaquark-like resonances can be natu- rally accommodated in a contact-range effective field theory description that incorpo- rates heavy-quark spin symmetry. This description leads to the prediction of all the seven possible S-wave heavy antimeson-baryon molecules (that is, there should be four additional molecular pentaquarks in addition to the Pc(4312), Pc(4440) and Pc(4457)), providing the first example of a heavy-quark spin symmetry molecular multiplet that is complete. If this is confirmed, it will not only give us an impressive example of the application of heavy-quark symmetries and effective field theories in hadron physics: it will also uncover a clear and powerful ordering principle for the molecular spec- trum, reminiscent of the SU(3)-flavor multiplets to which the light hadron spectrum conforms.

31 Recent progress in QCD at non-zero temperature and density

Peter PETRECZKY Brookhaven National Laboratory (Upton, N.Y., USA) [email protected] I will discuss recent progress in lattice QCD calculations at non-zero temperature and density. I will talk about the chiral crossover temperature as function of the baryon chemical potential and the phase transition temperature at vanishing up and down quark masses. I will present lattice results on QCD equation of state at zero and non- zero baryon density together with the fluctuations of conserved charges. The lattice results will be compared to weak coupling calculations at high temperature as well as with Hadron Resonance Gas at low temperatures. Finally new results on screening properties of the deconfined matter will be shown.

13 32 Valence pion parton distribution from lattice QCD

Peter PETRECZKY Brookhaven National Laboratory (Upton, N.Y., USA) [email protected] I will report on lattice QCD calculations of valence parton distribution inside the pion using two novel approaches: the quasi-PDF proposed by X. Ji and Ioffe time distri- bution proposed by Radyushkin. The lattice calculations have been performed at two lattice spacing a = 0.04 fm and a = 0.06 fm using 2+1 flavor highly improved staggered quark action in the sea and HYP smeared Wilson-Clover valence quarks with pion mass of about 300 MeV. The two different approaches to obtain the valence pion PDF will be compared to each other as well as with phenomenological extraction by JAM collabora- tion. [1] Izubuchi et al, arXiv:1905.06349 [hep-lat], to be published in PRD Title: Abstract:

33 Heavy baryons in the quark-soliton model

Michal PRASZALOWICZ Jagiellonian University [email protected] We discuss an approach to heavy baryons where the light sector is described within the quark-soliton model. The model describes well positive and negative parity baryons, including the decay widths. We then examine possible exotic states and argue that two out of five recently discovered Ωc baryons can be interpreted as pentaquarks. Finally ¯ ¯ we apply the same model to doubly heavy tetraquarks (QQq1q2).

34 Weak decay of the tetraquark with double beauty

Jean-Marc RICHARD University of Lyon, Institut de Physique Nucléaire de Lyon, IN2P3, France [email protected] The tetraquark (bbu¯d¯) with double beauty is almost certainly stable with respect to strong and electromagnetic interactions. A systematic study of the semi-leptonic and non-leptonic weak-decay modes has been carried out. The dominant modes provide some hints for experimental search of this genuinely exotic meson. The lifetime is pre- dicted significantly different from that of hadrons with single beauty. This work has been carried out with E. Hernández and A. Valcarce of Salamanca, and J. Vijande of Valencia.

14 35 Generalised Parton Distribution studies at Jefferson Lab

Daria SOKHAN University of Glasgow [email protected] Generalised Parton Distributions (GPDs), which relate the longitudinal momentum fraction of quarks and gluons to their transverse position, enable 3D tomographic imag- ing of the nucleon and can provide information on its spin composition and distribu- tion of pressure. The golden channel for accessing GPDs experimentally is the exclusive process of deeply virtual Compton scattering (DVCS), in which a high energy electron scatters from a parton within a nucleon and a high energy photon is produced as a re- sult. Access to GPDs through the related process of deeply virtual meson production (DVMP) – where a meson is produced instead of a photon – is less straight-forward, but the process is sensitive to a greater range of GPDs and enables their flavour-separation. We present DVCS and DVMP highlights from Jefferson Lab in the 6 GeV era and an overview of the 11 GeV programme.

36 Exotic and Conventional Physics Prospects at Belle II

Stefano SPATARO INFN and University Torino [email protected] The Belle II experiment at the SuperKEKB energy-asymmetric e+e− collider is a sub- stantial upgrade of the B-factory facility at the Japanese KEK laboratory. The design luminosity of the machine is 8×1035 cm−2 s−1 and the Belle II experiment aims to record 50 fb −1 of data, a factor of 50 more than its predecessor. From February to July 2018, the machine has completed a commissioning run and main operation of SuperKEKB has started in March 2019. Belle II is uniquely capable of studying the so-called "XYZ" particles: heavy exotic hadrons consisting of more than three quarks. First discovered by Belle, these now number in the dozens, and represent the emergence of a new cate- gory within . This talk will present the prospects of Belle II to explore both exotic and conventional quarkonium physics.

37 Holographic QCD: review and recent developments

Shigeki SUGIMOTO Yukawa Institute for Theoretical Physics (YITP), Kyoto University

15 [email protected] I will review the basic idea and applications of the top down approach of holo- graphic QCD.

38 Nuclear Structure and QCD

Anthony THOMAS CSSM, Department of Physics, University of Adelaide [email protected] We report on the latest developments of the QMC model. This novel approach to nuclear structure starts with the quark structure of hadrons, which is self- consistently modified by the interaction with the nuclear mean-fields. It allows the derivation of an energy density functional with many less parameters than phenomenological Skyrme forces, which nevertheless produces agreement with nuclear properties across the pe- riodic table at a similar level to those forces. Apart from nuclear properties, the QMC approach naturally predicts observable changes in the properties of bound hadrons, leading for example to a natural explanation of the EMC effect.

39 Few-body insights as regards the stability of multiquark hadrons

Alfredo VALCARCE MEJÍA University of Salamanca [email protected] I will review recent results of the spectroscopy and decays of exotic and non- exotic double heavy tetraquarks.

40 Baryon-antibaryon pair production in e+e− and in heavy- meson decay

Xiongfei WANG Lanzhou University [email protected] The BES III detector at Beijing Electron-Positron Collider has collected the world’s largest data sets. In this talk I will report recent results on the baryon anti-baryon pair production in the e+e− annihilation at BES III.

16 41 The theoretical discussion of Pc states and the predic- tion of J/ψ photo-production

Jiajun WU University of Chinese Academy of Sciences, Beijing [email protected]

The theoretical description of Pc states is introduced within a coupled-channel model. For searching Pcfor the on-going experiments at JLab, we make the predictions by in- cluding the amplitude of γp → Pc → J/ψp and the background mainly from Pomeron- exchange model. Then we find a best way to confirm the Pc production in the photo- production.

42 Nucleon properties in a strong magnetic field

Ulugbek YAKHSHIEV Inha University, Corea [email protected] We discuss the properties of nucleons under the strong magnetic field in the frame- work of chiral soliton model. In particular, we concentrate on the extreme magnetic field regimes existing in the interiors of the neutron stars and during the heavy-ion col- lisions. We discuss the effective masses and the possible structure changes of nucleons under the influence of the external magnetic field.

43 Hadrons and exotic hadrons from Belle and BESIII

Changzheng YUAN IHEP, Beijing [email protected] I this talk, I will report the recent results on conventional and exotic hadrons at Belle and BES III experiments. The progress on the study of the X(3872), Y (4260), and Zc(3900) will be emphasized.

44 Current and future prospects of heavy ion physics

In-Kwon YOO Pusan National University [email protected]

17 Since the heavy ion physics has been developed in experiment and theory a few decades long, the experimental results along the world-scale accelerators with increas- ing collision energies lead us to face new physics understanding on the new state of matter in the early stage of the universe just after the Bing-bang. In this talk, the current results of heavy ion collision experiments are briefly reviewed and the future prospect will be discussed.

45 Recent results and prospects on heavy hadrons at LHCb

Liming ZHANG Tsinghua University [email protected] The recent results at LHCb dealing with heavy hadrons, including exotics, and the perspectives of the ongoing analyses and future runs are presented.

18 Index Amsler, Claude, 1 Richard, Jean-Marc, 14

Braun-Munzinger, Peter, 1 Sokhan, Daria, 15 Spataro, Stefano, 15 Can, Kadir-Utku, 2 Sugimoto, Shigeki, 15

Dalton, Mark, 2 Thomas, Anthony, 16 Deur, Alexandre, 3 Valcarce Meija, Alfredo, 16 Franco, Celso, 3 Wang, Xiongfei, 16 Golubtsova, Anastasia, 3 Wu, Jiajun, 17 Grube, Boris, 4 Yakhshiev, Ulugbek, 17 Hiyama, Emiko, 4 Yoo, In-Kwon, 17 Hosaka, Atsushi, 5 Yuan, Changzheng, 17 Hyodo, Tetsuo, 5 Zhang, Liming, 18 Kamiya, Yuki, 5 Kim, Hungchong, 6 Kim, Hyun-Chul, 6 Kim, Hyungjoo, 6 Kumano, Shunzo, 7 Ky, Anh, 7

Lü, Cai-Dan, 8 Leinweber, Derek, 7 Lesiak, Tadeusz, 8

Martinez, Kay-Marie, 9 Mathur, Nilmani, 9 Melnitchouk, Wally, 10 Mitchell, Ryan, 10 Motta, Theo, 10 Munoz-Camacho, Carlos, 11

Nguyen, Hoang Vu, 12 Noumi, Hiroyuki, 11 Nowak, Maciej, 12

Pavon Valderrama, Manuel, 13 Petreczky, Peter, 13, 14 Praszalowicz, Michal, 14

19 Contents

1 Kaonic hydrogen and deuterium from SIDDHARTA 1

2 Decoding the phase structure of QCD with high energy nuclear collisions 1

3 Structure of the charmed baryons through an electromagnetic perspective 2

4 Recent Results from GlueX 2

5 Nucleon spin structure from large to small distances 3

6 Hadron structure results from COMPASS and plans for AMBER 3

7 On non-conformal models for bottom-up holographic QCD 3

8 Light-meson spectroscopy at COMPASS 4

9 Five–body structure of ssscc¯ system 4

10 Pc as heavy hadronic molecules with pion exchange force 5

11 Status of Λ(1405) in chiral dynamics 5

12 Study of KN¯ interaction from the hadron-hadron correlation in high-energy nuclear collisions 5

13 Structure of singly heavy baryons in a pion mean-field approach 6

14 Tetraquark mixing framework for the two light-meson nonets 6

15 φ meson in nuclear medium 6

16 Generalized distribution amplitudes and gravitational form factors of hadrons 7

17 Anh Ky 7

18 Lattice Insights into Hadron Structure 7

19 Future e+e− Colliders at the Energy Frontier 8

20 Weak decay of heavy flavors 8

21 Nuclear structure in the QMC model 9

22 Heavy four and six quark states from lattice QCD 9

20 23 Simultaneous QCD analysis of parton distributions 10

24 Studies of the Charmonium System at BES III 10

25 Neutron Stars, Hadrons, and High Density QCD 10

26 Deeply Virtual Compton Scattering off the neutron 11

27 Production of charmed baryons at J-PARC 11

28 Wilson loop in exact holographic RG flows at zero and finite temperature 12

29 Heavy-Light Tetraquark as Efimov State 12

30 The heavy-quark symmetry partners of the LHCb pentaquark trio 13

31 Recent progress in QCD at non-zero temperature and density 13

32 Valence pion parton distribution from lattice QCD 14

33 Heavy baryons in the quark-soliton model 14

34 Weak decay of the tetraquark with double beauty 14

35 Generalised Parton Distribution studies at Jefferson Lab 15

36 Exotic and Conventional Quarkonium Physics Prospects at Belle II 15

37 Holographic QCD: review and recent developments 15

38 Nuclear Structure and QCD 16

39 Few-body insights as regards the stability of multiquark hadrons 16

40 Baryon-antibaryon pair production in e+e− and in heavy-meson decay 16

41 The theoretical discussion of Pc states and the prediction of J/ψ photo-production 17

42 Nucleon properties in a strong magnetic field 17

43 Hadrons and exotic hadrons from Belle and BESIII 17

44 Current and future prospects of heavy ion physics 17

45 Recent results and prospects on heavy hadrons at LHCb 18

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