«Nucleus-2020»

Total Page:16

File Type:pdf, Size:1020Kb

«Nucleus-2020» NRC «Kurchatov Institute» Saint Petersburg State University Joint Institute for Nuclear Research LXX INTERNATIONAL CONFERENCE «NUCLEUS-2020» NUCLEAR PHYSICS AND ELEMENTARY PARTICLE PHYSICS. NUCLEAR PHYSICS TECHNOLOGIES. BOOK OF ABSTRACTS Online part. 12 – 17 October 2020 Saint Petersburg НИЦ «Курчатовский институт» Санкт-Петербургский государственный университет Объединенный институт ядерных исследований LXX МЕЖДУНАРОДНАЯ КОНФЕРЕНЦИЯ «ЯДРО-2020» ЯДЕРНАЯ ФИЗИКА И ФИЗИКА ЭЛЕМЕНТАРНЫХ ЧАСТИЦ. ЯДЕРНО-ФИЗИЧЕСКИЕ ТЕХНОЛОГИИ. СБОРНИК ТЕЗИСОВ Онлайн часть. 12 – 17 октября 2020 Санкт-Петербург Organisers NRC «Kurchatov Institute» Saint Petersburg State University Joint Institute for Nuclear Research Chairs M. Kovalchuk (Chairman, NRC “Kurchatov Institute”) V. Zherebchevsky (Co-Chairman, SPbU) P. Forsh (Vice-Chairman, NRC “Kurchatov Institute”) Yu. Dyakova (Vice-Chairman, NRC “Kurchatov Institute”) A. Vlasnikov (Vice-Chairman, SPbU) S. Torilov (Scientific Secretary, SPbU) The contributions are reproduced directly from the originals. The responsibility for misprints in the report and paper texts is held by the authors of the reports. International Conference “NUCLEUS – 2020. Nuclear physics and elementary particle physics. Nuclear physics technologies” (LXX; 2020; Online part). LXX International conference “NUCLEUS – 2020. Nuclear physics and elementary particle physics. Nuclear physics technologies” (Saint Petersburg, Russia, 12–17 October 2020): Book of Abstracts /Ed. by V. N. Kovalenko and E. V. Andronov. – Saint Petersburg: VVM, 2020. – 324p. ISBN Международная Конференция «ЯДРО – 2020. Ядерная физика и физика элементарных частиц. Ядерно-физические технологии» (LXX; 2020; Онлайн часть). LXX Международная Конференция «ЯДРО – 2020. Ядерная физика и физика элементарных частиц. Ядерно-физические технологии» (Санкт-Петербург, Россия, 12–17 Октября 2020): Аннот. докл./под ред. В.Н. Коваленко, Е.В. Андронова. – Санкт-Петербург: ВВМ , 2020. – 324 c. ISBN 978-5-9651-0587-8 ISBN 978-5-9651-0587-8 ii Program Committee V. Zherebchevsky (Chairman of the PC, SPbU, Russia), V. Andrianov (Vice-Chairman of the PC, SPbU, Russia), V. Aksenov (NRC “Kurchatov Institute”, Russia), I. Alekseev (V. G. Khlopin Radium Institute, Russia), A. Andrianov (SPbU, Russia), V. Brudanin (JINR, Russia), V. Bunakov (NRC “Kurchatov Institute”, PNPI, Russia), V. Egorychev (NRC “Kurchatov Institute”, ITEP, Russia), G. Feofilov (SPbU, Russia), V. Il’gisonis (Rosatom, Russia), S. Ivanov (NRC “Kurchatov Institute”, IHEP, Russia), A. Korsheninnikov (NRC “Kurchatov Institute”, Russia), V. Maksimov (NRC “Kurchatov Institute”, PNPI, Russia), N. Marchenkov (NRC “Kurchatov Institute”, Russia), I. Mitropolsky (NRC “Kurchatov Institute”, PNPI, Russia), R. Panin (SPbU, Russia), Yu. Penionzhkevich (JINR, Russia), V. Rubchenya (V. G. Khlopin Radium Institute, Russia), M. Skorokhvatov (NRC “Kurchatov Institute”, Russia), K. Stopani (MSU, Russia), D. Tsypkin (SPbU, Russia), N. Tyurin (NRC “Kurchatov Institute”, IHEP, Russia), V. Voronin (NRC “Kurchatov Institute”, PNPI, Russia), V. Voronov (JINR, Russia), S. Yakovlev (SPbU, Russia), E. Yatsishina (NRC “Kurchatov Institute”, Russia), N. Zelenskaya (MSU, Russia) International Advisory Committee V. Baryshevsky (Research Institute for Nuclear Problems of Belarusian State University, Belarus), N. Burtebayev (The Institute of Nuclear Physics, Kazakhstan), M. Gazdzicki (Goethe University Frankfurt, Germany), P. Giubellino (GSI, Germany), V. Goldberg (Texas A&M University, USA), R. Jolos (JINR, Russia), K. Kuterbekov (L.N.Gumilyov Eurasian National University, Kazakhstan), M. Lewitowicz (GANIL, France), Yu. Litvinov (GSI, Germany), E. Litvinova (Western Michigan University, USA), V. Manzari (INFN, Italy), V. Matveev (JINR, Russia), L. Musa (CERN, Switzerland), G. Rogachev (Texas A&M University, USA), I. Selyuzhenkov (GSI, Germany), W. Trzaska (University of Jyväskylä, Finland), X. Viñas (University of Barcelona, Barcelona) Local Organizing Committee E. Andronov (chairman of the LOC), I. Altsybeev, A. Andrianov, S. Andrianov, V. Andrianov, G. Belozerskii, M. Buidze, A. Erokhin, V. Kondratiev, V. Kovalenko, T. Lazareva, N. Maltsev, D. Naurzbayev D. Nesterov, Yu. Novikov, R. Panin, V. Petrov D. Pichugina, N. Prokofiev, D. Prokhorova, A. Rakhmatullina, V. Sandul, A. Seryakov, I. Smirnov, V. Tselyaev, F. Valiev, V. Vechernin, S. Yakovlev, A. Zvyagina iii iv Contents СЕМЬДЕСЯТ ЕЖЕГОДНЫХ ЯДЕРНЫХ КОНФЕРЕНЦИЙ ................ 1 Plenary Session 5 PHYSICAL CRITERIA OF DATA RELIABILITY AND SYSTEMATIC UNCERTAINTIES OF PHOTONEUTRON REACTION CROSS SECTIONS ................... 5 MECHANISMS OF MULTY-STAGE NUCLEAR DECAYS WITH TAKING INTO ACCOUNT REAL AND VIRTUAL STATES OF INTERMEDIATE NUCLEI ............. 6 HAWKING RADIATION FROM STRANGE QUARK NUGGETS, RELICS OF THE QCD PHASE TRANSITION ................................... 7 SPECTROSCOPIC FACTORS: MEASURABILITY AND OBSERVABILITY . 7 OVERVIEW OF RECENT HEAVY ION RESULTS FORM CMS EXPERIMENT . 8 NEW INNER TRACKING SYSTEM (ITS) FOR OPEN CHARM DIRECT MEASUREMENTS BY ALICE AT THE LHC: STATUS AND PERSPECTIVES ................ 8 CANCER AND EUROPEAN NETWORK FOR LIGHT ION HADRON THERAPY (EN- LIGHT) ........................................... 9 NEW RADIONUCLIDES FOR PERSONALIZED MEDICINE (THERANOSTICS) . 9 PROSPECTS OF JIANGMEN UNDERGROUND NEUTRINO OBSERVATORY . 10 THE NEUTRAL PION RADIATIVE WIDTH MEASUEREMENT: RESULTS FROM PRIMEX (JLAB) ............................................ 10 STRONG INTERACTIONS AND THE EMERGENCE OF MASS . 11 HISTORY OF ONE CALENDAR DATE TO THE 80-TH ANNIVERSARY OF THE DISCOV- ERY OF SPONTANEOUS FISSION ............................ 11 NUCLEAR FORCE FROM QCD POINT OF VIEW ...................... 12 OBSERVATION OF STERILE ANTINEUTRINO OSCILLATION IN NEUTRINO-4 EXPERI- MENT AT SM-3 REACTOR ................................ 13 LATEST RESULTS ON (ANTI-)HYPERNUCLEI PRODUCTION AT THE LHC WITH ALICE ................................................ 13 STAR RECENT RESULTS ON HEAVY-ION COLLISIONS . 14 v NUCLEAR RESPONSE AT ZERO AND FINITE TEMPERATURE . 14 COMPTON IONIZATION OF ATOMS NEAR THRESHOLD AS A METHOD OF SPEC- TROSCOPY OF OUTER SHELLS ............................. 15 ALICE UPGRADE FOR RUN 3 AND 4 AT THE CERN LHC . 15 TERMONUCLEAR EXPLOSIONS AND NUCLEOSYNTHESIS OF HEAVY ELEMENTS . 16 MODIFICATION OF HADRON PROPERTIES IN A DENSE AND HOT BARYONIC MAT- TER ............................................. 16 PHENIX HIGHLIGHTS .................................... 17 INVESTIGATION OF REACTION CROSS SECTION FOR BEAM OF 8Li, 8He ON 28Si, 59Co, 181Ta TARGETS ....................................... 17 HIGHLIGHTS FROM THE ALICE EXPERIMENT AT THE LHC . 18 SELF-CONSISTENT APPROACH TO BETA-DECAY OF NEUTRON-RICH NUCLEI . 18 PHASE TRANSITIONS IN ATOMIC NUCLEI ........................ 19 RECENT RESULTS FROM NA61/SHINE STRONG INTERACTION PROGRAMME . 20 NEW NUCLEAR PHYSICAL PHENOMENON - SPONTANEOUS NUCLEAR SYNTHESIS 20 NUCLEAR PHYSICS IN MEDICINE: PRESENT AND PROSPECTS . 21 PROJECT KATRIN FIRST RESULT ON THE NEUTRINO MASS. 22 PHYSICS AND ASTROPHYSICS OF ULTRA-HIGH ENERGY COSMIC RAYS: RECENT RE- SULTS FROM THE PIERRE AUGER OBSERVATORY . 23 DERICA PROJECT: DUBNA ELECTRON – RADIOACTIVE ION COLLIDER FACILITY . 23 SEARCH FOR NEUTRINOLESS DOUBLE BETA DECAY WITH GERDA . 24 Section 1. Experimental and theoretical studies of the properties of atomic nuclei 25 ∆I = 1 ”STAGGERING” EFFECT IN THE SPECTRUM OF BAND OF EVEN-EVEN NUCLEI ................................................ 25 TRIAXIALITY OF EVEN-EVEN NUCLEI WITH QUADRUPOLE AND OCTUPOLE DEFOR- MATIONS .......................................... 25 ENERGY SPECTRUM OF COLLECTIVE STATES OF ODD-ODD NUCLEI . 26 ЭНЕРГЕТИЧЕСКИЙ СПЕКТР И СТРУКТУРА СОСТОЯНИЙ ИЗОТОПА 156Gd . 26 NUCLEAR MATTER DENSITY DISTRIBUTIONS OF THE LIGHT WEAKLY BOUND NU- CLEI ............................................. 27 ENERGY SURFACE AROUND A DEFORMED EVEN-EVEN NUCLEI WITH 150<A<190 27 COLLECTIVE STRUCTURE IN 116Sb ............................. 28 vi PROPERTIES OF ISOSCALAR GIANT MULTIPOLE RESONANCES IN MEDIUM-HEAVY CLOSED-SHELL NUCLEI: A SEMIMICROSCOPIC DESCRIPTION . 29 PARTICLE-HOLE DISPERSIVE OPTICAL MODEL FOR OPEN-SHELL NUCLEI. IMPLE- MENTATIONS FOR DESCRIBING 0+ GIANT RESONANCES IN TIN ISOTOPES . 30 THE STRUCTURE OF HIGH-SPIN (9+) ISOMERS AND THE NATURE OF ROTATIONAL BANDS IN ODD-ODD Ho NUCLEI WITH A = 156, 158, 160 . 31 NON-STATISTICAL EFFECTS IN BETA & GAMMA DECAYS AND BETA-DELAYED FIS- SION ANALYSIS ...................................... 32 A SEARCH FOR RARE NUCLEAR AND INDUCED DECAYS IN HAFNIUM . 33 ROLE OF DIBARYON RESONANCES IN ELASTIC AND INELASTIC NN SCATTERING 33 THEORETICAL STUDY OF WEAKLY-BOUND TRIATOMIC SYSTEMS WITH FADDEEV EQUATIONS IN TOTAL ANGULAR MOMENTUM REPRESENTATION . 34 RESONANCES IN THE SYSTEM WITH AN INTERNAL DEGREE OF FREEDOM . 34 QUANTUM SPEED LIMITS FOR TIME EVOLUTION OF A SYSTEM SUBSPACE . 35 EFIMOV STATES IN THREE-ATOMIC SYSTEMS ...................... 35 METASTABLE STATES OF DIATOMIC BERYLLIUM MOLECULE . 36 RADIAL ASYMPTOTIC OF THE WAVE FUNCTION OF FEW-PARTICLES IN THE CON- TINUUM .......................................... 36 ELECTROMAGNETIC TRANSITIONS IN HEAVY ODD-A NUCLEI . 37 FOUR-NEUTRON DECAY CORRELATIONS ........................ 38 RESEARCH OF ISOBAR: Yb-Tm-Er-Ho WITH A=157 ................... 38 USE OF MOLECULES TO EXTRACT FUNDAMENTAL PROPERTIES OF NUCLEI . 38 STRUCTURE OF 10Li IN ONE-NEUTRON TRANSFER REACTION 2H(9Li,p) . 39 INFLUENCE OF CHARGE-EXCHANGE RESONANCES ON THE CAPTURE OF SOLAR NEUTRINO BY MOLYBDENUM 98 AND 100 ...................... 39 STRUCTURE OF LIGHT Λ-HYPERNUCLEI
Recommended publications
  • What Is the Nature of Neutrinos?
    16th Neutrino Platform Week 2019: Hot Topics in Neutrino Physics CERN, Switzerland, Switzerland, 7– 11 October 2019 Matrix Elements for Neutrinoless Double Beta Decay Fedor Šimkovic OUTLINE I. Introduction (Majorana ν’s) II. The 0νββ-decay scenarios due neutrinos exchange (simpliest, sterile ν, LR-symmetric model) III. DBD NMEs – Current status (deformation, scaling relation?, exp. support, ab initio… ) IV. Quenching of gA (Ikeda sum rule, 2νββ-calc., novel approach for effective gA ) V. Looking for a signal of lepton number violation (LHC study, resonant 0νECEC …) Acknowledgements: A. Faessler (Tuebingen), P. Vogel (Caltech), S. Kovalenko (Valparaiso U.), M. Krivoruchenko (ITEP Moscow), D. Štefánik, R. Dvornický (Comenius10/8/2019 U.), A. Babič, A. SmetanaFedor(IEAP SimkovicCTU Prague), … 2 After 89/63 years Fundamental ν properties No answer yet we know • Are ν Dirac or • 3 families of light Majorana? (V-A) neutrinos: •Is there a CP violation ν , ν , ν ν e µ τ e in ν sector? • ν are massive: • Are neutrinos stable? we know mass • What is the magnetic squared differences moment of ν? • relation between • Sterile neutrinos? flavor states • Statistical properties and mass states ν µ of ν? Fermionic or (neutrino mixing) partly bosonic? Currently main issue Nature, Mass hierarchy, CP-properties, sterile ν The observation of neutrino oscillations has opened a new excited era in neutrino physics and represents a big step forward in our knowledge of neutrino10/8/2019 properties Fedor Simkovic 3 Symmetric Theory of Electron and Positron Nuovo Cim. 14 (1937) 171 CNNP 2018, Catania, October 15-21, 2018 10/8/2019 Fedor Simkovic 4 ν ↔ ν- oscillation (neutrinos are Majorana particles) 1968 Gribov, Pontecorvo [PLB 28(1969) 493] oscillations of neutrinos - a solution of deficit10/8/2019 of solar neutrinos in HomestakeFedor Simkovic exp.
    [Show full text]
  • Ivan V. Ani~In Faculty of Physics, University of Belgrade, Belgrade, Serbia and Montenegro
    THE NEUTRINO Its past, present and future Ivan V. Ani~in Faculty of Physics, University of Belgrade, Belgrade, Serbia and Montenegro The review consists of two parts. In the first part the critical points in the past, present and future of neutrino physics (nuclear, particle and astroparticle) are briefly reviewed. In the second part the contributions of Yugoslav physics to the physics of the neutrino are commented upon. The review is meant as a first reading for the newcomers to the field of neutrino physics. Table of contents Introduction A. GENERAL REVIEW OF NEUTRINO a.2. Electromagnetic properties of the neutrino PHYSICS b. Neutrino in branches of knowledge other A.1. Short history of the neutrino than neutrino physics A.1.1. First epoch: 1930-1956 A.2. The present status of the neutrino A.1.2. Second epoch: 1956-1958 A.3. The future of neutrino physics A.1.3. Third epoch: 1958-1983 A.1.4. Fourth epoch: 1983-2001 B. THE YUGOSLAV CONNECTION a. The properties of the neutrino B.1. The Thallium solar neutrino experiment a.1. Neutrino masses B.2. The neutrinoless double beta decay a.1.1. Direct methods Epilogue a.1.2. Indirect methods References a.1.2.1. Neutrinoless double beta decay a.1.2.2. Neutrino oscillations 1 Introduction The neutrinos appear to constitute by number of species not less than one quarter of the particles which make the world, and even half of the stable ones. By number of particles in the Universe they are perhaps second only to photons.
    [Show full text]
  • SNOLAB Construction Status and Experimental Program
    M. Chen Queen’s University SNOLAB Construction Status and Experimental Program SNOLAB located 2 km underground in an active nickel mine near Sudbury, Canada it’s an expansion of the underground facility on the same level as the SNO experiment Surface Facility Excavation Status (Today) -Blasting for Phase I Excavation complete. - Shotcrete walls complete - Concrete floors almost finished. BLADDER ROOM BLADDER ROOM SHOWER ROOM SHOWER ROOM DOUBLE TRACKS DOUBLE TRACKS LADDER LABS LADDER LABS CUBE HALL CUBE HALL Phase I - Cube Hall (18x15x15 m) - Ladder Labs (~7mx~7mx60m) Utility Area - Chiller, generator, Lab Entrance water systems Existing SNO - Personnel Areas Facilities -Material Handling -SNO Cavern (30m x 22m dia) - Utility & Control Rms SNOLAB Workshop V, 21 August 2006 Phase II -Cryopit Phase I (15m x15m dia) - Cube Hall (18x15x15 m) - Ladder Labs (~7mx~7mx60m) Utility Area - Chiller, generator, Lab Entrance water systems Existing SNO - Personnel Areas Facilities -Material Handling -SNO Cavern (30m x 22m dia) - Utility & Control Rms Rectangular Hall Control Rm Utility Drift Staging Area Rectangular Hall 60’L x 50’W 50’ (shoulder) 65’ (back) SNOLAB Workshop IV, 15 Aug 2005 Ladder Labs Wide Drift Electrical, 20’x12’ AHUs (19’ to back) Wide Drift 25’x17’ (25’ to back) Access Drift 15’x10’ (15’ to back) Chemistry Lab SNOLAB Workshop IV, 15 Aug 2005 SNOLAB Experiments z Some 20 projects submitted Letters of Interest in locating at SNOLAB. Of these, 10 have been encouraged by the Experiment Advisory Committee as being both scientifically important and particularly suited to the SNOLAB location. z The experimental physics program includes − Neutrinos: Low energy solar neutrinos, geo-neutrinos, reactor neutrinos, supernova neutrino detection z Tests of neutrino properties, precision measurements of solar neutrinos, radiogenic heat generation in the earth, stellar evolution.
    [Show full text]
  • Electron Capture in Stars
    Electron capture in stars K Langanke1;2, G Mart´ınez-Pinedo1;2;3 and R.G.T. Zegers4;5;6 1GSI Helmholtzzentrum f¨urSchwerionenforschung, D-64291 Darmstadt, Germany 2Institut f¨urKernphysik (Theoriezentrum), Department of Physics, Technische Universit¨atDarmstadt, D-64298 Darmstadt, Germany 3Helmholtz Forschungsakademie Hessen f¨urFAIR, GSI Helmholtzzentrum f¨ur Schwerionenforschung, D-64291 Darmstadt, Germany 4 National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA 5 Joint Institute for Nuclear Astrophysics: Center for the Evolution of the Elements, Michigan State University, East Lansing, Michigan 48824, USA 6 Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA E-mail: [email protected], [email protected], [email protected] Abstract. Electron captures on nuclei play an essential role for the dynamics of several astrophysical objects, including core-collapse and thermonuclear supernovae, the crust of accreting neutron stars in binary systems and the final core evolution of intermediate mass stars. In these astrophysical objects, the capture occurs at finite temperatures and at densities at which the electrons form a degenerate relativistic electron gas. The capture rates can be derived in perturbation theory where allowed nuclear transitions (Gamow-Teller transitions) dominate, except at the higher temperatures achieved in core-collapse supernovae where also forbidden transitions contribute significantly to the rates. There has been decisive progress in recent years in measuring Gamow-Teller (GT) strength distributions using novel experimental techniques based on charge-exchange reactions. These measurements provide not only data for the GT distributions of ground states for many relevant nuclei, but also serve as valuable constraints for nuclear models which are needed to derive the capture rates for the arXiv:2009.01750v1 [nucl-th] 3 Sep 2020 many nuclei, for which no data exist yet.
    [Show full text]
  • Recommended Conventions for Reporting Results from Direct Dark Matter Searches
    Recommended conventions for reporting results from direct dark matter searches D. Baxter1, I. M. Bloch2, E. Bodnia3, X. Chen4,5, J. Conrad6, P. Di Gangi7, J.E.Y. Dobson8, D. Durnford9, S. J. Haselschwardt10, A. Kaboth11,12, R. F. Lang13, Q. Lin14, W. H. Lippincott3, J. Liu4,5,15, A. Manalaysay10, C. McCabe16, K. D. Mor˚a17, D. Naim18, R. Neilson19, I. Olcina10,20, M.-C. Piro9, M. Selvi7, B. von Krosigk21, S. Westerdale22, Y. Yang4, and N. Zhou4 1Kavli Institute for Cosmological Physics and Enrico Fermi Institute, University of Chicago, Chicago, IL 60637 USA 2School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv 69978, Israel 3University of California, Santa Barbara, Department of Physics, Santa Barbara, CA 93106, USA 4INPAC and School of Physics and Astronomy, Shanghai Jiao Tong University, MOE Key Lab for Particle Physics, Astrophysics and Cosmology, Shanghai Key Laboratory for Particle Physics and Cosmology, Shanghai 200240, China 5Shanghai Jiao Tong University Sichuan Research Institute, Chengdu 610213, China 6Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691, Sweden 7Department of Physics and Astronomy, University of Bologna and INFN-Bologna, 40126 Bologna, Italy 8University College London, Department of Physics and Astronomy, London WC1E 6BT, UK 9Department of Physics, University of Alberta, Edmonton, Alberta, T6G 2R3, Canada 10Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA 94720, USA 11STFC Rutherford Appleton Laboratory (RAL), Didcot, OX11 0QX, UK 12Royal Holloway,
    [Show full text]
  • Ultra-Weak Gravitational Field Theory Daniel Korenblum
    Ultra-weak gravitational field theory Daniel Korenblum To cite this version: Daniel Korenblum. Ultra-weak gravitational field theory. 2018. hal-01888978 HAL Id: hal-01888978 https://hal.archives-ouvertes.fr/hal-01888978 Preprint submitted on 5 Oct 2018 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Ultra-weak gravitational field theory Daniel KORENBLUM [email protected] April 2018 Abstract The standard model of the Big Bang cosmology model ΛCDM 1 considers that more than 95 % of the matter of the Universe consists of particles and energy of unknown forms. It is likely that General Relativity (GR)2, which is not a quantum theory of gravitation, needs to be revised in order to free the cosmological model of dark matter and dark energy. The purpose of this document, whose approach is to hypothesize the existence of the graviton, is to enrich the GR to make it consistent with astronomical observations and the hypothesis of a fully baryonic Universe while maintaining the formalism at the origin of its success. The proposed new model is based on the quantum character of the gravitational field. This non-intrusive approach offers a privileged theoretical framework for probing the properties of the regime of ultra-weak gravitational fields in which the large structures of the Universe are im- mersed.
    [Show full text]
  • 2.3 Neutrino-Less Double Electron Capture - Potential Tool to Determine the Majorana Neutrino Mass by Z.Sujkowski, S Wycech
    DEPARTMENT OF NUCLEAR SPECTROSCOPY AND TECHNIQUE 39 The above conservatively large systematic hypothesis. TIle quoted uncertainties will be soon uncertainty reflects the fact that we did not finish reduced as our analysis progresses. evaluating the corrections fully in the current analysis We are simultaneously recording a large set of at the time of this writing, a situation that will soon radiative decay events for the processes t e'v y change. This result is to be compared with 1he and pi-+eN v y. The former will be used to extract previous most accurate measurement of McFarlane the ratio FA/Fv of the axial and vector form factors, a et al. (Phys. Rev. D 1984): quantity of great and longstanding interest to low BR = (1.026 ± 0.039)'1 I 0 energy effective QCD theory. Both processes are as well as with the Standard Model (SM) furthermore very sensitive to non- (V-A) admixtures in prediction (Particle Data Group - PDG 2000): the electroweak lagLangian, and thus can reveal BR = (I 038 - 1.041 )*1 0-s (90%C.L.) information on physics beyond the SM. We are currently analyzing these data and expect results soon. (1.005 - 1.008)* 1W') - excl. rad. corr. Tale 1 We see that even working result strongly confirms Current P1IBETA event sxpelilnentstatistics, compared with the the validity of the radiative corrections. Another world data set. interesting comparison is with the prediction based on Decay PIBETA World data set the most accurate evaluation of the CKM matrix n >60k 1.77k element V d based on the CVC hypothesis and ihce >60 1.77_ _ _ results
    [Show full text]
  • Search for Dark Matter with Liquid Argon and Pulse Shape Discrimination: Results from DEAP-1 and Status of DEAP-3600
    Search for Dark Matter with Liquid Argon and Pulse Shape Discrimination: Results from DEAP-1 and Status of DEAP-3600 P. Gorel, for the DEAP Collaboration Centre for Particle Physics, University of Alberta, Edmonton, T6G2E1, CANADA In the last decade, Direct Dark Matter searches has become a very active research program, spawning dozens of projects world wide and leading to contradictory results. It is on this stage that the Dark matter Experiment with liquid Argon and Pulse shape discrimination (DEAP) is about to enter. With a 3600 kg liquid argon target and a 1000 kg fiducial mass, it is designed to run background free during 3 years, reaching an unprecedented sensitivity of 10−46 cm2 for a WIMP mass of 100 GeV. In order to achieve this impressive feat, the collaboration followed a two-pronged approach: a careful selection of every material entering the construction of the detector in order to suppress the backgrounds, and optimum use of the pulse shape discrimination (PSD) technique to separate the nuclear recoils from the electronic recoils. Using the experience acquired ffrom the 7 kg-prototype DEAP-1, a 3600 kg detector is being completed at SNOLAB (Sudbury, CANADA) and is expected to start taking data in mid-2014. 1 Dark matter detection using liquid argon For decades, liquid argon (LAr) has been a candidate of choice for large scintillating detectors. It is easy to purify and boasts a high light yield, which makes it ideal for low background, low threshold experiments. The scintillating process involves the creation of excimer, either directly or through ionization/recombination.
    [Show full text]
  • PASAG Report
    Report of the HEPAP Particle Astrophysics Scientific Assessment Group (PASAG) 23 October 2009 Introduction and Executive Summary 1.1 Introduction The US is presently a leader in the exploration of the Cosmic Frontier. Compelling opportunities exist for dark matter search experiments, and for both ground-based and space-based dark energy investigations. In addition, two other cosmic frontier areas offer important scientific opportunities: the study of high- energy particles from space and the cosmic microwave background.” - P5 Report, 2008 May, page 4 Together with the Energy Frontier and the Intensity Frontier, the Cosmic Frontier is an essential element of the U.S. High Energy Physics (HEP) program. Scientific efforts at the Cosmic Frontier provide unique opportunities to discover physics beyond the Standard Model and directly address fundamental physics: the study of energy, matter, space, and time. Astrophysical observations strongly imply that most of the matter in the Universe is of a type that is very different from what composes us and everything we see in daily life. At the same time, well-motivated extensions to the Standard Model of particle physics, invented to solve very different sets of problems, also tend to predict the existence of relic particles from the early Universe that are excellent candidates for the mysterious dark matter. If true, the dark matter isn’t just “out there” but is also passing through us. The opportunity to detect dark matter interactions is both compelling and challenging. Investments from the previous decades have paid off: the capability is now within reach to detect directly the feeble signals of the passage of cosmic dark matter particles in ultra-low-noise underground laboratories, as well as the possibility to isolate for the first time the high-energy particle signals in the cosmos, particularly in gamma rays, that should occur when dark matter particles collide with each other in astronomical systems.
    [Show full text]
  • Double-Beta Decay of 96Zr and Double-Electron Capture of 156Dy to Excited Final States
    Double-Beta Decay of 96Zr and Double-Electron Capture of 156Dy to Excited Final States by Sean W. Finch Department of Physics Duke University Date: Approved: Werner Tornow, Supervisor Calvin Howell Kate Scholberg Berndt Mueller Albert Chang Dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Physics in the Graduate School of Duke University 2015 Abstract Double-Beta Decay of 96Zr and Double-Electron Capture of 156Dy to Excited Final States by Sean W. Finch Department of Physics Duke University Date: Approved: Werner Tornow, Supervisor Calvin Howell Kate Scholberg Berndt Mueller Albert Chang An abstract of a dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Physics in the Graduate School of Duke University 2015 Copyright c 2015 by Sean W. Finch All rights reserved except the rights granted by the Creative Commons Attribution-Noncommercial License Abstract Two separate experimental searches for second-order weak nuclear decays to excited final states were conducted. Both experiments were carried out at the Kimballton Underground Research Facility to provide shielding from cosmic rays. The first search is for the 2νββ decay of 96Zr to excited final states of the daughter nucleus, 96Mo. As a byproduct of this experiment, the β decay of 96Zr was also investigated. Two coaxial high-purity germanium detectors were used in coincidence to detect γ rays produced by the daughter nucleus as it de-excited to the ground state. After collecting 1.92 years of data with 17.91 g of enriched 96Zr, half-life limits at the level of 1020 yr were produced.
    [Show full text]
  • Limit on the Radiative Neutrinoless Double Electron Capture of Ar from GERDA Phase I
    Eur. Phys. J. C (2016) 76:652 DOI 10.1140/epjc/s10052-016-4454-5 Regular Article - Experimental Physics Limit on the radiative neutrinoless double electron capture of 36Ar from GERDA Phase I GERDA Collaboration1,a M. Agostini1, M. Allardt4, A. M. Bakalyarov13, M. Balata1, I. Barabanov11 , N. Barros4,20, L. Baudis19, C. Bauer7, E. Bellotti8,9, S. Belogurov11,12, S. T. Belyaev13, G. Benato19, A. Bettini16,17, L. Bezrukov11, T. Bode15, D. Borowicz3,5, V. Brudanin5, R. Brugnera16,17, A. Caldwell14, C. Cattadori9, A. Chernogorov12, V. D’Andrea1, E. V. Demidova12, A. di Vacri1, A. Domula4, E. Doroshkevich11, V. Egorov5, R. Falkenstein18, O. Fedorova11, K. Freund18, N. Frodyma3, A. Gangapshev7,11, A. Garfagnini16,17, C. Gooch14, P. Grabmayr18, V. Gurentsov11, K. Gusev5,13,15, J. Hakenmüller7, A. Hegai18,M.Heisel7, S. Hemmer17, G. Heusser7, W. Hofmann7,M.Hult6, L. V. Inzhechik11,21, J. Janicskó Csáthy15, J. Jochum18, M. Junker1, V. Kazalov11,T.Kihm7, I. V. Kirpichnikov12 , A. Kirsch7,A.Kish19, A. Klimenko5,7,22, R. Kneißl14, K. T. Knöpfle7, O. Kochetov5, V. N. Kornoukhov11,12, V. V. K u z m i n o v 11, M. Laubenstein1, A. Lazzaro15, V. I. Lebedev13, B. Lehnert4,H.Y.Liao14, M. Lindner7, I. Lippi17, A. Lubashevskiy5,7 , B. Lubsandorzhiev11, G. Lutter6, C. Macolino1,23, B. Majorovits14, W. Maneschg7, E. Medinaceli16,17, M. Miloradovic19, R. Mingazheva19, M. Misiaszek3, P. Moseev11, I. Nemchenok5, D. Palioselitis14, K. Panas3, L. Pandola2, K. Pelczar3, A. Pullia10, S. Riboldi10, N. Rumyantseva5, C. Sada16,17, F. Salamida9, M. Salathe7, C. Schmitt18, B. Schneider4, S. Schönert15, J. Schreiner7, A.-K.
    [Show full text]
  • Postdoctoral Position in the DEAP and Darkside-20K Experiments
    Postdoctoral position in the DEPARTMENT OF PHYSICS Physics, Engineering Physics, DEAP and DarkSide-20k experiments Astronomy Stirling Hall Queen’s University Kingston, Ontario, Canada K7L 3N6 Tel 613 533-2707 Job Summary Fax 613 533-6463 The experimental particle astrophysics group at Queen's University in Kingston, Canada, which is part of the McDonald Institute (https://mcdonaldinstitute.ca/), expects to hire a postdoc to work on the argon dark matter searches DEAP-3600 and DarkSide-20k with Professors Philippe Di Stefano, Art McDonald and Peter Skensved, and with scientists at the TRIUMF laboratory. The postdoc will be actively involved in the analysis of data from the upgraded DEAP-3600 experiment, and in the development of digital electronics and DAQ for the DarkSide-20k experiment at Gran Sasso with 20 tonnes fiducial of liquid argon extracted from an underground source. Construction of a 1-ton prototype detector will start in 2021. These experiments are a stepping-stone towards a 300-tonne fiducial detector, Argo, for which the preferential location is SNOLAB. Work will be carried out in conjunction with the TRIUMF laboratory in Vancouver, with CERN, and with Gran Sasso. Required Qualifications - Candidates must have obtained a PhD in physics or applied physics, with a specialization in particle physics, nuclear physics, or instrumentation. In exceptional circumstances, PhD candidates with a firm date of defense will be considered. - The ability to perform independent research and to communicate results verbally and in writing. - The ability to work in a team including both graduate and undergraduate students. Preferred Qualifications - Experience with particle detectors, including readout, and scintillators.
    [Show full text]