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Bounds on Unparticles from the Higgs Sector
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by UNT Digital Library Preprint typeset in JHEP style - HYPER VERSION Bounds on Unparticles from the Higgs Sector Patrick J. Foxa, Arvind Rajaramanb and Yuri Shirmanb a Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 b Department of Physics, University of California, Irvine, CA92697 Abstract: We study supersymmetric QCD in the conformal window as a laboratory for unparticle physics, and analyze couplings between the unparticle sector and the Higgs sector. These couplings can lead to the unparticle sector being pushed away from its scale invariant fixed point. We show that this implies that low energy experiments will not be able to see unparticle physics, and the best hope of seeing unparticles is in high energy collider experiments such as the Tevatron and the LHC. We also demonstrate how the breaking of scale invariance could be observed at these experiments. Contents 1. Introduction and Conclusions 1 2. Supersymmetric QCD as a model of unparticle physics 2 3. Operator analysis and experimental constraints 3 4. New effects in non-unparticle physics 5 1. Introduction and Conclusions Recently there has been a lot of interest [1–8] in unparticle theories [9, 10] in which the Standard Model (SM) is coupled to a conformal sector (called the unparticle sector). As shown in [9, 10], the conformal sector can have interesting and unexpected consequences. In this note, we shall investigate the effects on the conformal sector from the Higgs sector, and we will show that this leads to surprising new bounds on unparticle physics. -
When the Disorder Is Just Right
VIEWPOINT When the Disorder is Just Right A new model suggests that disorder can be a crucial ingredient for producing non-Fermi-liquid behavior in a system of interacting fermions. By Philip W. Phillips n 1956, physicist Lev Landau developed a theory describing devilishly difficult. Only a handful of solvable non-Fermi-liquid the low-temperature properties of helium-3 as those of a models exist for simplified cases. Building on one of these Iliquid of interacting fermions. Landau’s Fermi-liquid theory models, called the Sachdev–Ye–Kitaev (SYK) model [1], a team turned out to be widely applicable. It successfully describes, for led by Subir Sachdev of Harvard University has developed a new instance, the low-temperature properties of most metals. There theory that addresses an important, unresolved question: how are, however, numerous fermionic systems that aren’t Fermi does non-Fermi-liquid behavior arise in a condensed-matter liquids, including one-dimensional “Luttinger” liquids, Mott system—for instance, one where fermions (such as electrons) insulators, and heavy fermion materials. Understanding these are coupled to massless bosons (such as phonons)? The team’s exotic systems is an important research direction in modern results show that in a 2D system, non-Fermi liquid behavior can condensed-matter physics, but their theoretical description is emerge if there is a sufficient degree of disorder in the coupling between the bosons and the fermions [2]. To understand what might destroy Fermi-liquid behavior, it is helpful to recall an important property of Fermi liquids—they admit a purely local description in momentum space. -
Search for Dark Matter and Unparticles Produced in Association with a Z Boson in Proton-Proton Collisions at √S = 8 Tev
Search for dark matter and unparticles produced in association with a Z boson in proton-proton collisions at √s = 8 TeV The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Citation Khachatryan, V. et al. “Search for dark matter and unparticles produced in association with a Z boson in proton-proton collisions at √s = 8 TeV.” Physical Review D 93, 5 (March 2016): 052011 © 2016 CERN, for the CMS Collaboration As Published http://dx.doi.org/10.1103/PhysRevD.93.052011 Publisher American Physical Society Version Final published version Citable link http://hdl.handle.net/1721.1/110705 Terms of Use Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. PHYSICAL REVIEW D 93, 052011 (2016) Search for dark matter and unparticles producedp inffiffi association with a Z boson in proton-proton collisions at s ¼ 8 TeV V. Khachatryan et al.* (CMS Collaboration) (Received 30 November 2015; published 22 March 2016) A search for evidence of particle dark matter (DM) and unparticle production at the LHC has been performed using events containing two charged leptons, consistent with the decay of a Z boson, and large missing transverse momentum. This study is based on data collected with the CMS detector corresponding to an integrated luminosity of 19.7 fb−1 of pp collisions at the LHC at a center-of-mass energy of 8 TeV. No significant excess of events is observed above the number expected from the standard model contributions. -
Vector Unparticle Enhanced Black Holes: Exact Solutions and Thermodynamics
Physics Faculty Works Seaver College of Science and Engineering 9-2010 Vector unparticle enhanced black holes: exact solutions and thermodynamics Jonas R. Mureika Loyola Marymount University, [email protected] Euro Spallucci Universit`a di Trieste & INFN Follow this and additional works at: https://digitalcommons.lmu.edu/phys_fac Part of the Physics Commons Recommended Citation Mureika, J.R. and E. Spallucci, "Vector unparticle enhanced black holes: Exact solutions and thermodynamics," Physics Letters B 693, 129-133 (2010). http://dx.doi.org/10.1016/ j.physletb.2010.08.025. This Article - post-print is brought to you for free and open access by the Seaver College of Science and Engineering at Digital Commons @ Loyola Marymount University and Loyola Law School. It has been accepted for inclusion in Physics Faculty Works by an authorized administrator of Digital Commons@Loyola Marymount University and Loyola Law School. For more information, please contact [email protected]. Vector unparticle enhanced black holes: exact solutions and thermodynamics J. R. Mureika 1 Department of Physics, Loyola Marymount University, Los Angeles, CA 90045-2659 Euro Spallucci 2 Dipartimento di Fisica Teorica, Universit`adi Trieste and INFN, Sezione di Trieste, Italy Abstract Tensor and scalar unparticle couplings to matter have been shown to enhance gravitational interactions and provide corrections to the Schwarzschild metric and associated black hole structure. We derive an exact solution to the Einstein equations for vector unparticles, and conclusively demonstrate that these induce Riessner-Nordstr¨om (RN)-like solutions where the role of the “charge” is defined by a composite of unparticle phase space parameters. These black holes admit double-horizon structure, although unlike the RN metric these solutions have a minimum inner horizon value. -
50 & 100 Years A
NEWS & VIEWS NATURE|Vol 457|29 January 2009 CONDENSED-MATTER PHYSICS The pnictide code 50 YEARS AGO Jan Zaanen In previous communications, Hopes are that the emergent family of iron-based superconductors, the the existence of a third normal, pnictides, could act as a Rosetta stone in decoding the two-decade mystery embryonic haemoglobin was reported to be present in the blood of superconductivity observed at high temperatures. of foetuses up to five months of intra-uterine life ... By using About a year ago, the announcement of the against the might of this quantum simplicity. the column chromatographic discovery1 of a new family of superconductors Metaphorically, the cuprate electron world is procedure described by Huisman made from iron-based compounds prompted like a quantized form of dense traffic on a busy and Prins, with some minor an army of physicists and chemists to study highway. The electrons are subject to perpetual modifications, we were able these pnictides. But what caused — and is per- quantum motions, but can hinder each other’s to separate the three distinct petuating — this frenzy? The quest for a higher motions to such an extent that the electron fractions from the haemolysate transition temperature, Tc (the temperature ‘traffic’ jams completely, causing undoped of a four month old embryo ... above which no superconductivity is attained), cuprates to become insulating. Chemical dop- Thus, we were able to separate stalled2 at a meagre 56 kelvin, and the focus ing can clear the way on the ‘quantum highway’, not only the two haemoglobin of the excitement has shifted: it is now hoped and at low levels of doping a quantum incarna- fractions known to be present that the pnictides will be instrumental in tion of stop-and-go traffic is observed6. -
Curriculum Vitae Robert-Jan Slager
CURRICULUM VITAE ROBERT-JAN SLAGER Postdoctoral fellow Email: [email protected] Harvard University Website: scholar.harvard.edu/robertjanslager 17 Oxford Street, 02138 Cambridge, MA, USA INFORMATION Citation statistics: over 800 total citations, h-index: 13 (Google scholar) Date of birth: March 24th 1988 Nationality: Dutch RESEARCH INTERESTS My research interests revolve around theoretical condensed matter physics with a particular emphasis on topological phases of matter. To attack problems I rely on tailor-designed strategies that involve both analytical and numerical studies. Relevant keywords describing my work include: Topological insulators, zero-mode physics, monodromy defects, spin-charge separa- tion, solitons, topological classification of order, Green's function formalism, lattice gauge theory, Non-Abelian discrete gauge theories, impurity problems and spinon hybridization problems, crys- talline protected topological phases. Nonetheless, I think that in modern science a broad and sometimes even interdisciplinary area of research, in addition to a specific long-term subject of focus, is a prerequisite. In this regard I have also worked on quantum nematic phases as well as quantum criticality and try to maintain an active and open view. More recently, I have also become interested in Floquet states, magnetism and tensor network approaches. In particular, I am currently pursuing studies to identify new topological phases of matter in the context of out of equilibrium systems, such as Floquet systems and magnon spectra. EDUCATION • Ph.D. at Instituut-Lorenz, Leiden University, January 2016 - Thesis title: The symmetry of crystals and the topology of electrons - With highest honors, `Cum Laude', awarded to top 5% of doctoral students - Advisor: Prof. -
Unparticle Physics
UNPARTICLE PHYSICS Jonathan Feng UC Irvine Detecting the Unexpected UC Davis 16-17 November 2007 OVERVIEW • New physics weakly coupled to SM through heavy mediators Mediators SM CFT • Many papers [hep-un] • Many basic, outstanding questions • Goal: provide groundwork for discussion, LHC phenomenology 16 Nov 07 Feng 2 CONFORMAL INVARIANCE • Conformal invariance implies scale invariance, theory “looks the same on all scales” • Scale transformations: x Æ e-α x , φ Æ edα φ • Classical field theories are conformal if they have no dimensionful parameters: dφ = 1, dψ = 3/2 • SM is not conformal even as a classical field theory – Higgs mass breaks conformal symmetry 16 Nov 07 Feng 3 CONFORMAL INVARIANCE • At the quantum level, dimensionless couplings depend on scale: renormalization group evolution g g Q Q • QED, QCD are not conformal 16 Nov 07 Feng 4 CONFORMAL FIELD THEORIES • Banks-Zaks (1982) β-function for SU(3) with NF flavors g For a range of N , flows to a F Q perturbative infrared stable fixed point • N=1 SUSY SU(NC) with NF flavors For a range of NF, flows to a strongly coupled infrared stable fixed point Intriligator, Seiberg (1996) 16 Nov 07 Feng 5 UNPARTICLES Georgi (2007) • Hidden sector (unparticles) coupled to SM through non- renormalizable couplings at M g • Assume unparticle sector [ ] [ ] becomes conformal at Λ , U couplings to SM preserve conformality in the IR Q ΛU M • Operator OUV , dimension dUV = 1, 2,… Æ operator O, dimension d • BZ Æ d ≈ dUV, but strong coupling Æ d ≠ dUV . Unitary CFT Æ d ≥ 1 for scalar O, d ≥ 3 for vector O. -
Thermal Unparticles: a New Form of Energy Density in the Universe
EPJ manuscript No. (will be inserted by the editor) Thermal Unparticles: A New Form of Energy Density in the Universe Shao-Long Chen1,2, Xiao-Gang He1,2, Xue-Peng Hu3, and Yi Liao3 a 1 Department of Physics and Center for Theoretical Sciences, National Taiwan University, Taipei 2 Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, Taipei 3 Department of Physics, Nankai University, Tianjin 300071 Received: date / Revised version: date Abstract. Unparticle U with scaling dimension dU has peculiar thermal properties due to its unique phase space structure. We find that the equation of state parameter ωU , the ratio of pressure to energy density, is given by 1/(2dU + 1) providing a new form of energy in our universe. In an expanding universe, the unparticle energy density ρU (T ) evolves dramatically differently from that for photons. For dU > 1, even if ρU (TD) at a high decoupling temperature TD is very small, it is possible to have a large relic density 0 0 ρU (Tγ ) at present photon temperature Tγ , large enough to play the role of dark matter. We calculate TD 0 and ρU (Tγ ) using photon-unparticle interactions for illustration. PACS. 98.80.Cq Particle-theory and field-theory models of the early Universe – 11.15.Tk Other nonper- turbative techniques – 11.25.Hf Conformal field theory, algebraic structures – 14.80.-j Other particles In cosmology the equation of state (EoS) parameter the behavior of unparticle energy density ρ (T ) is dramat- ω, the ratio of pressure (p) to energy density (ρ), for a ically different than that for photons. -
Proceedings of Introduction to Neutrosophic Physics: Unmatter
Florentin Smarandache editor UNMATTER Combinations. Let’s note by q = quark ∈{Up, Down, Top, Bottom, Strange, Charm}, and by a = antiquark ∈{Up^, Down^, Top^, Bottom^, Strange^, Charm^}. Hence, for combinations of n quarks and antiquarks, n ≥ 2, prevailing the colorless, we have the following unmatter possibilities: - if n = 2, we have: qa (biquark – for example the mesons and antimessons); - if n = 3, we have qqq, aaa (triquark – for example the baryons and antibaryons); - if n = 4, we have qqaa (tetraquark); - if n = 5, we have qqqqa, aaaaq (pentaquark); - if n = 6, we have qqqaaa, qqqqqq, aaaaaa (hexaquark); - if n = 7, we have qqqqqaa, qqaaaaa (septiquark); - if n = 8, we have qqqqaaaa, qqqqqqaa, qqaaaaaa (octoquark); - if n = 9, we have qqqqqqqqq, qqqqqqaaa, qqqaaaaaa, aaaaaaaaa Zip(nonaquark); Publishing - if n = 10, we have qqqqqaaaaa, qqqqqqqqaa, qqaaaaaaaa (decaquark);2011 etc. -------------------------------------------------------------------------------------------------- The American Mathematical Society International Conference Introduction to Neutrosophic Physics: Unmatter & Unparticle University of New Mexico, Mathematics & Sciences Department Gallup, New Mexico, USA, December 2-4, 2011 -------------------------------------------------------------------------------------------------- Proceedings of the Introduction to Neutrosophic Physics: Unmatter & Unparticle International Conference Florentin Smarandache editor University of New Mexico Mathematics & Sciences Department Gallup, NM 87301, USA [email protected] December 2-4, 2011 1 1 This book can be ordered on paper or electronic formats from: Zip Publishing 1313 Chesapeake Avenue Columbus, Ohio 43212 USA Tel. (614) 485-0721 E-mail: [email protected] Website: www.zippublishing.com Copyright 2011 by Editor and the Authors for their papers Front and back covers by Editor Peer-reviewers: Dmitri Rabounski, editor-in-chief of Progress in Physics international journal. -
Lt25 Final Report
LT25 FINAL REPORT Venue and program The 25th International Conference on Low Temperature Physics (LT25) was hosted by the Kamerlingh Onnes Laboratorium of the Leiden Institute of Physics and held in the RAI Convention Center in Amsterdam, The Netherlands, 6-13 August 2008. It was the second time that the Kamerlingh Onnes Laboratory had the privilege of organizing an LT conference. In 1958, at LT6, 50 years of liquid helium temperatures were commemorated; in 2008 we celebrated the 100th anniversary of the remarkable achievements of Heike Kamerlingh Onnes and his collaborators in Leiden. In 1958 there were 323 participants. In 2008 we registered 1390 people. This large participation required adequate conference and housing facilities. These could not be found in Leiden, but were conveniently available in Amsterdam. The triennial International Low Temperature Conferences are the most important global meetings that bring together the international scientific community in the broad field of Low Temperature Physics. Because the meeting is held only every third year the plenary and half plenary talks generally provided an overview of important new discoveries over the last few years, whereas the short oral presentations are mainly focused on very recent developments. Since the field is broad, embracing a large section of condensed matter physics, the program is divided into five parallel program lines: A. Quantum Gases, Fluids and Solids, B. Superconductivity, C. Quantum Phase Transitions and Magnetism, D. Electronic Quantum Transport in Condensed Matter, E. Cryogenic Techniques and Applications. Each program line had its own program committee headed by a program director. The scientific program included 194 oral and 1479 poster presentations. -
Unparticle Dark Matter
THE UNIVERSITY OF ALABAMA University Libraries Unparticle Dark Matter T. Kikuchi – KEK N. Okada – KEK Deposited 05/30/2019 Citation of published version: Kikuchi, T., Okada, N. (2008): Unparticle Dark Matter. Physics Letters B, 665(4). DOI: https://doi.org/10.1016/j.physletb.2008.06.021 © 2008 Elsevier Science B. V. All rights reserved. Physics Letters B 665 (2008) 186–189 Contents lists available at ScienceDirect Physics Letters B ELSEVIER www.elsevier.com/locate/physletb Unparticle dark matter ∗ Tatsuru Kikuchi a, , Nobuchika Okada a,b a Theory Division, KEK, 1-1 Oho, Tsukuba 305-0801, Japan b Department of Particle and Nuclear Physics, The Graduate University for Advanced Studies, Oho 1-1, Tsukuba, Ibaraki 305-0801, Japan article info abstract Article history: Once a parity is introduced in unparticle physics, under which unparticle provided in a hidden conformal Received 8 May 2008 sector is odd while all Standard Model particles are even, unparticle can be a suitable candidate for Received in revised form 4 June 2008 the cold dark matter (CDM) in the present universe through its coupling to the Standard Model Higgs Accepted 6 June 2008 doublet. We find that for Higgs boson mass in the range, 114.4GeV m 250 GeV, the relic abundance Availableonline18June2008 h of unparticle with mass 50 GeV mU 80 GeV can be consistent with the currently observed CDM Editor: T. Yanagida density. In this scenario, Higgs boson with mass mh 160 GeV dominantly decays into a pair of unparticles and such an invisible Higgs boson may be discovered in future collider experiments. -
Unparticle Self-Interactions the Harvard Community Has
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Harvard University - DASH Unparticle Self-Interactions The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters. Citation Georgi, Howard, and Yevgeny Kats. Forthcoming. Unparticle self- interactions. Journal of High Energy Physics. Published Version http://www.springer.com/new+%26+forthcoming+titles+%28defa ult%29/journal/13130 Accessed February 18, 2015 7:55:08 AM EST Citable Link http://nrs.harvard.edu/urn-3:HUL.InstRepos:4317739 Terms of Use This article was downloaded from Harvard University's DASH repository, and is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of- use#OAP (Article begins on next page) Unparticle self-interactions Howard Georgi,1 Yevgeny Kats,2 Center for the Fundamental Laws of Nature Jefferson Physical Laboratory Harvard University Cambridge, MA 02138 Abstract We develop techniques for studying the effects of self-interactions in the conformal sector of an unparticle model. Their physics is encoded in the higher !-point functions of the conformal theory. We study inclusive processes and argue that the inclusive production of unparticle stuff in standard model processes due to the unparticle self- interactions can be decomposed using the conformal partial wave expansion and its generalizations into a sum over contributions from the production of various kinds of unparticle stuff, corresponding to different primary conformal operators. Such processes typically involve the production of unparticle stuff associated with oper- ators other than those to which the standard model couples directly.