BSM Physics with Light Particles Mikhail Shaposhnikov
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Arxiv:1712.01768V1 [Hep-Ex] 5 Dec 2017
Prospects of the SHiP and NA62 experiments at CERN for hidden sector searches Philippe Mermod∗, on behalf of the SHiP Collaboration Particle Physics Department, Faculty of Science, University of Geneva, Geneva, Switzerland E-mail: [email protected] High-intensity proton beams impinging on a fixed target or beam dump allow to probe new physics via the production of new weakly-coupled particles in hadron decays. The CERN SPS provides opportunities to do so with the running NA62 experiment and the planned SHiP ex- periment. Reconstruction of kaon decay kinematics (beam mode) allows NA62 to probe for the existence of right-handed neutrinos and dark photons with masses below 0.45 GeV. Direct recon- struction of displaced vertices from the decays of new neutral particles (dump mode) will allow NA62 and SHiP to probe right-handed neutrinos with masses up to 5 GeV and mixings down to several orders of magnitude smaller than current constraints, in regions favoured in models which explain at once neutrino masses, matter-antimatter asymmetry and dark matter. arXiv:1712.01768v1 [hep-ex] 5 Dec 2017 The 19th International Workshop on Neutrinos from Accelerators-NUFACT2017 25-30 September, 2017 Uppsala University, Uppsala, Sweden ∗Speaker. c Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). https://pos.sissa.it/ Hidden sector searches with SHiP and NA62 Philippe Mermod 1. Introduction The LHC experiments have been running for several years without finding new physics at the TeV scale. A complementary approach is to probe the presence of new particles at lower energy scales with couplings to the Standard Model so weak that they have escaped detection in previous searches. -
Axions and Other Similar Particles
1 91. Axions and Other Similar Particles 91. Axions and Other Similar Particles Revised October 2019 by A. Ringwald (DESY, Hamburg), L.J. Rosenberg (U. Washington) and G. Rybka (U. Washington). 91.1 Introduction In this section, we list coupling-strength and mass limits for light neutral scalar or pseudoscalar bosons that couple weakly to normal matter and radiation. Such bosons may arise from the spon- taneous breaking of a global U(1) symmetry, resulting in a massless Nambu-Goldstone (NG) boson. If there is a small explicit symmetry breaking, either already in the Lagrangian or due to quantum effects such as anomalies, the boson acquires a mass and is called a pseudo-NG boson. Typical examples are axions (A0)[1–4] and majorons [5], associated, respectively, with a spontaneously broken Peccei-Quinn and lepton-number symmetry. A common feature of these light bosons φ is that their coupling to Standard-Model particles is suppressed by the energy scale that characterizes the symmetry breaking, i.e., the decay constant f. The interaction Lagrangian is −1 µ L = f J ∂µ φ , (91.1) where J µ is the Noether current of the spontaneously broken global symmetry. If f is very large, these new particles interact very weakly. Detecting them would provide a window to physics far beyond what can be probed at accelerators. Axions are of particular interest because the Peccei-Quinn (PQ) mechanism remains perhaps the most credible scheme to preserve CP-symmetry in QCD. Moreover, the cold dark matter (CDM) of the universe may well consist of axions and they are searched for in dedicated experiments with a realistic chance of discovery. -
Gaugino Mass in Heavy Sfermion Scenario
IPMU 15-0137 Gaugino mass in heavy sfermion scenario Keisuke Harigaya1, 2 1Kavli IPMU (WPI), UTIAS, The University of Tokyo, Kashiwa, 277-8583, Japan 2ICRR, University of Tokyo, Kashiwa, Chiba 277-8582, Japan (Dated: May 8, 2018) Abstract The heavy sfermion scenario is naturally realized when supersymmetry breaking fields are charged under some symmetry or are composite fields. There, scalar partners of standard model fermions and the gravitino are as heavy as O(10-1000) TeV while gauginos are as heavy as O(1) TeV. The scenario is not only consistent with the observed higgs mass, but also is free from cosmo- logical problems such as the Polonyi problem and the gravitino problem. In the scenario, gauginos are primary targets of experimental searches. In this thesis, we discuss gaugino masses in the heavy sfermion scenario. First, we derive the so-called anomaly mediated gaugino mass in the superspace formalism of supergravity with a Wilsonian effective action. Then we calculate gaugino masses generated through other possible one-loop corrections by extra light matter fields and the QCD axion. Finally, we consider the case where some gauginos are degenerated in their masses with each other, because the thermal relic abundance of the lightest supersymmetric particle as well as the the strategy to search gauginos drastically change in this case. After calculating the thermal relic abundance of the lightest supersymmetric particle for the degenerated case, we discuss the phenomenology of gauginos at the Large Hadron Collider and cosmic ray experiments. arXiv:1508.04811v1 [hep-ph] 19 Aug 2015 1 Contents I. Introduction 6 II. -
The Higgs Boson and the Cosmology of the Early Universe Mikhail Shaposhnikov Blois 2018
The Higgs Boson and the Cosmology of the Early Universe Mikhail Shaposhnikov Blois 2018 Rencontres de Blois, June 4, 2018 – p. 1 Almost 6 years with the Higgs boson: July 4, 2012, Higgs at ATLAS and CMS 3500 ATLAS Data Sig+Bkg Fit (m =126.5 GeV) 3000 H Bkg (4th order polynomial) 2500 Events / 2 GeV 2000 1500 s=7 TeV, ∫Ldt=4.8fb-1 1000 s=8 TeV, ∫Ldt=5.9fb-1 γγ→ 500 H (a) 200100 110 120 130 140 150 160 100 0 -100 Events - Bkg (b) -200 100 110 120 130 140 150 160 Data S/B Weighted 100 Sig+Bkg Fit (m =126.5 GeV) H Bkg (4th order polynomial) 80 weights / 2 GeV Σ 60 40 20 (c) 8100 110 120 130 140 150 160 4 0 -4 (d) -8 Σ weights - Bkg 100 110 120 130 140 150 160 m γγ [GeV] Rencontres de Blois, June 4, 2018 – p. 2 What did we learn from the Higgs discovery for particle physics? Rencontres de Blois, June 4, 2018 – p. 3 The ideas of the authors of the BEH mechanism were right Rencontres de Blois, June 4, 2018 – p. 4 The Standard Model is now complete Rencontres de Blois, June 4, 2018 – p. 5 126 125 U U U GeV Triumph of the SM in particle physics No significant deviations from the SM have been observed Rencontres de Blois, June 4, 2018 – p. 6 126 125 U U U GeV Triumph of the SM in particle physics No significant deviations from the SM have been observed The masses of the top quark and of the Higgs boson, the Nature has chosen, make the SM a self-consistent effective field theory all the way up to the quantum gravity Planck scale MP . -
Review of Dark Matter
Review of Dark Matter Leonard S. Kisslinger Department of Physics, Carnegie Mellon University, Pittsburgh PA 15213 USA. Debasish Das Saha Institute of Nuclear Physics,1/AF, Bidhan Nagar, Kolkata 700064, INDIA. PACS Indices:11.30.Er,14.60.Lm,13.15.+g Keywords: dark matter, sterile neutrinos, dark photons Abstract In this review of Dark Matter we review dark matter as sterile neutrinos, fermions, with their present and possibly future detection via neutrino Oscillations. We review the creation of Dark Matter via interactions with the Dark Energy (quintesence) field. We also review bosons as dark matter, discussing a proposed search for dark photons. Since photons are vector bosons, if dark photons exist at least part of dark matter are vector bosons. Ongoing experimental detection of Dark Matter is reviewed. 1 Introduction The most important experiments which have estimated the amount of Dark Matter in the present universe are Cosmic Microwave Background Radiation (CMBR) experiments, discussed in the section 2. There have been a number of theoretical models for the creation of Dark Matter, which is reviewed in section 3. It is almost certain that sterile nuetrinos are part of Dark Matter. Experiments detecting sterile nuetrinos via neutrino oscillation and a theoretical study of neutrino oscil- lations with 3 active and 3 sterile neutrinos with the present results are discussed in section 4. Also a recent search for sub-Gev Dark Matter by the MiniBooNE-DM Collaboration is briefly discussed in section 4. Neutrinos are fermions with quantum spin 1/2. It is possible that some Dark Matter particle are vector bosons with quantum spin 1, like the photon. -
Light Dark Matter Searches with Positrons
Eur. Phys. J. A manuscript No. (will be inserted by the editor) Light dark matter searches with positrons M. Battaglieri1,2, A. Bianconi3,4, P. Bisio5, M. Bondì1, A. Celentano1, G. Costantini3,4, P.L. Cole6, L. Darmé7, R. De Vita1, A. D’Angelo8,9, M. De Napoli10, L. El Fassi11, V. Kozhuharov7,12, A. Italiano10, G. Krnjaic13,14, L. Lanza8, M. Leali3,4, L. Marsicano1,a, V. Mascagna4,15, S. Migliorati3,4, E. Nardi7, M. Raggi16,17,a, N. Randazzo10, E. Santopinto1, E. Smith2, M. Spreafico5, S. Stepanyan2, M. Ungaro2, P. Valente17, L. Venturelli3,4, M.H. Wood18 1Istituto Nazionale di Fisica Nucleare, Sezione di Genova, 16146 Genova, Italy 2Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 3Università degli Studi di Brescia, 25123 Brescia, Italy 4INFN, Sezione di Pavia, 27100 Pavia, Italy 5Università degli Studi di Genova, 16146 Genova, Italy 6Lamar University, 4400 MLK Blvd, PO Box 10046, Beaumont, Texas 77710 7Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, Via E. Fermi 54, Frascati, Italy 8INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy 9Università di Roma Tor Vergata, 00133 Rome Italy 10Istituto Nazionale di Fisica Nucleare, Sezione di Catania, 95125 Catania, Italy 11Mississippi State University, Mississippi State, Mississippi 39762-5167, USA 12Faculty of physics, University of Sofia, 5 J. Bourchier Blvd., 1164 Sofia, Bulgaria 13Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA 14Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA 15Università degli Studi dell’Insubria, 22100 Como, Italy 16Sapienza Università di Roma, piazzale Aldo Moro 5 Roma, Italy 17Istituto Nazionale di Fisica Nucleare, Sezione di Roma, piazzale Aldo Moro 5 Roma, Italy 18Canisius College, Buffalo, NY 14208, USA Draft : May 27, 2021 Abstract We discuss two complementary strategies to 1 Introduction and motivations search for light dark matter (LDM) exploiting the posi- tron beam possibly available in the future at Jefferson One of the most compelling arguments motivating the Laboratory. -
QCD Axion Dark Matter with a Small Decay Constant
UC Berkeley UC Berkeley Previously Published Works Title QCD Axion Dark Matter with a Small Decay Constant. Permalink https://escholarship.org/uc/item/61f6p95k Journal Physical review letters, 120(21) ISSN 0031-9007 Authors Co, Raymond T Hall, Lawrence J Harigaya, Keisuke Publication Date 2018-05-01 DOI 10.1103/physrevlett.120.211602 Peer reviewed eScholarship.org Powered by the California Digital Library University of California PHYSICAL REVIEW LETTERS 120, 211602 (2018) Editors' Suggestion QCD Axion Dark Matter with a Small Decay Constant Raymond T. Co,1,2,3 Lawrence J. Hall,2,3 and Keisuke Harigaya2,3 1Leinweber Center for Theoretical Physics, University of Michigan, Ann Arbor, Michigan 48109, USA 2Department of Physics, University of California, Berkeley, California 94720, USA 3Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA (Received 20 December 2017; published 23 May 2018) The QCD axion is a good dark matter candidate. The observed dark matter abundance can arise from 11 misalignment or defect mechanisms, which generically require an axion decay constant fa ∼ Oð10 Þ GeV (or higher). We introduce a new cosmological origin for axion dark matter, parametric resonance from 8 11 oscillations of the Peccei-Quinn symmetry breaking field, that requires fa ∼ ð10 –10 Þ GeV. The axions may be warm enough to give deviations from cold dark matter in large scale structure. DOI: 10.1103/PhysRevLett.120.211602 Introduction.—The absence of CP violation from QCD is unstable and decays into axions [10], yielding a dark is a long-standing problem in particle physics [1] and is matter density [11,12] elegantly solved by the Peccei-Quinn (PQ) mechanism 1.19 [2,3] involving a spontaneously broken anomalous sym- 2 fa Ω h j − ≃ 0.04–0.3 : ð2Þ metry. -
Unifying Inflation with the Axion, Dark Matter, Baryogenesis, and the Seesaw Mechanism
Unifying Inflation with the Axion, Dark Matter, Baryogenesis, and the Seesaw Mechanism. Andreas Ringwald Astroteilchenseminar Max-Planck-Institut für Kernphysik Heidelberg, D 13 November 2017 [Guillermo Ballesteros, Javier Redondo, AR, Carlos Tamarit, 1608.05414; 1610.01639] Fundamental Problems > Standard Model (SM) describes interactions of all known particles with remarkable accuracy Andreas Ringwald | Unifying Inflation with Axion, Dark Matter, Baryogenesis, and Seesaw, Seminar, MPIK HD, D, 13 November 2017 | Page 2 Fundamental Problems > Standard Model (SM) describes interactions of all known particles with remarkable accuracy > Big fundamental problems in par- ticle physics and cosmology seem to require new physics § Dark matter § Neutrino masses and mixing § Baryon asymmetry § Inflation § Strong CP problem [PLANCK] Andreas Ringwald | Unifying Inflation with Axion, Dark Matter, Baryogenesis, and Seesaw, Seminar, MPIK HD, D, 13 November 2017 | Page 3 Fundamental Problems > Standard Model (SM) describes interactions of all known particles with remarkable accuracy > Big fundamental problems in par- ticle physics and cosmology seem to require new physics § Dark matter § Neutrino masses and mixing § Baryon asymmetry § Inflation § Strong CP problem > These problems may be intertwin- ed in a minimal way, with a solu- tion pointing to a new physics sca- le around [Ballesteros,Redondo,AR,Tamarit, 1608.05414; 1610.01639] Andreas Ringwald | Unifying Inflation with Axion, Dark Matter, Baryogenesis, and Seesaw, Seminar, MPIK HD, D, 13 November 2017 | Page 4 Strong CP Problem > Most general gauge invariant Lagrangian of QCD: § Parameters: strong coupling ↵s, quark masses and theta angle [Belavin et al. `75;´t Hooft 76;Callan et al. `76;Jackiw,Rebbi `76 ] Andreas Ringwald | Unifying Inflation with Axion, Dark Matter, Baryogenesis, and Seesaw, Seminar, MPIK HD, D, 13 November 2017 | Page 5 Strong CP Problem > Most general gauge invariant Lagrangian of QCD: § Parameters: strong coupling ↵s, quark masses and theta angle [Belavin et al. -
The Grand Battle
the grand battle Alexander Kartavtsev 23 July 2013 23 July 2013 Alexander Kartavtsev 1 Angels and demons Outline 1. Experimental observations 2. Theoretical advancements 3. Electroweak baryogenesis 4. Baryogenesis via leptogenesis 5. Current status 6. Summary 23 July 2013 Alexander Kartavtsev 3 Antimatter predicted (1928) … during his postgraduate years he concentrated solely on his research, and stopped only on Sunday, when he took long strolls alone … Paul Dirac 23 July 2013 Alexander Kartavtsev 5 Antimatter discovered (1932) Carl Anderson 23 July 2013 Alexander Kartavtsev 7 Cosmic rays (1936) Homi Bhabha 23 July 2013 Alexander Kartavtsev 8 Cosmic rays contain positrons and antiprotons 23 July 2013 Alexander Kartavtsev 9 Cosmic rays would contain complex antiatoms 23 July 2013 Alexander Kartavtsev 10 23 July 2013 Alexander Kartavtsev 11 CMB (1965) Robert Woodrow Wilson Arno Allan Penzias 23 July 2013 Alexander Kartavtsev 13 Baryon to photon ratio = 6.1x10-10 23 July 2013 Alexander Kartavtsev 14 23 July 2013 Alexander Kartavtsev 15 BBN η = 5.8x10-10 23 July 2013 Alexander Kartavtsev 16 Inflation Alan Guth 23 July 2013 Alexander Kartavtsev 17 Generation of the baryon asymmetry 23 July 2013 Alexander Kartavtsev 18 Sakharov conditions (1967) Violation of baryon number C- and CP-violation Deviation from equilibrium Andrei Sakharov 23 July 2013 Alexander Kartavtsev 19 Standard model (1967) Sheldon Glashow Steven Weinberg Abdus Salam 23 July 2013 Alexander Kartavtsev 20 Baryon number violation ? 23 July 2013 Alexander Kartavtsev 21 Dirac sea 23 July 2013 Alexander Kartavtsev 23 Dirac sea 23 July 2013 Alexander Kartavtsev 24 Sphalerons (1984) Frans Klinkhamer Nick Manton 23 July 2013 Alexander Kartavtsev 26 CP-violation James Cronin Val Fitch 23 July 2013 Alexander Kartavtsev 27 Deviation from equilibrium 23 July 2013 Alexander Kartavtsev 28 First order transition ? 23 July 2013 Alexander Kartavtsev 29 Electroweak baryogenesis (1985) Valery Rubakov Vadim Kuzmin Mikhail Shaposhnikov 23 July 2013 Alexander Kartavtsev 30 B-L = const. -
Exotic Particles in Topological Insulators
EXOTIC PARTICLES IN TOPOLOGICAL INSULATORS A DISSERTATION SUBMITTED TO THE DEPARTMENT OF PHYSICS AND THE COMMITTEE ON GRADUATE STUDIES OF STANFORD UNIVERSITY IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY Rundong Li July 2010 © 2010 by Rundong Li. All Rights Reserved. Re-distributed by Stanford University under license with the author. This work is licensed under a Creative Commons Attribution- Noncommercial 3.0 United States License. http://creativecommons.org/licenses/by-nc/3.0/us/ This dissertation is online at: http://purl.stanford.edu/yx514yb1109 ii I certify that I have read this dissertation and that, in my opinion, it is fully adequate in scope and quality as a dissertation for the degree of Doctor of Philosophy. Shoucheng Zhang, Primary Adviser I certify that I have read this dissertation and that, in my opinion, it is fully adequate in scope and quality as a dissertation for the degree of Doctor of Philosophy. Ian Fisher I certify that I have read this dissertation and that, in my opinion, it is fully adequate in scope and quality as a dissertation for the degree of Doctor of Philosophy. Steven Kivelson Approved for the Stanford University Committee on Graduate Studies. Patricia J. Gumport, Vice Provost Graduate Education This signature page was generated electronically upon submission of this dissertation in electronic format. An original signed hard copy of the signature page is on file in University Archives. iii Abstract Recently a new class of quantum state of matter, the time-reversal invariant topo- logical insulators, have been theoretically proposed and experimentally discovered. -
L Gauge and Higgs Bosons at the DUNE Near Detector
FERMILAB-PUB-21-200-T, MI-TH-218 Light, Long-Lived B L Gauge and Higgs Bosons at the DUNE − Near Detector P. S. Bhupal Dev,a Bhaskar Dutta,b Kevin J. Kelly,c Rabindra N. Mohapatra,d Yongchao Zhange;a aDepartment of Physics and McDonnell Center for the Space Sciences, Washington University, St. Louis, MO 63130, USA bMitchell Institute for Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A&M University, College Station, TX 77845, USA cTheoretical Physics Department, Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, IL 60510, USA dMaryland Center for Fundamental Physics, Department of Physics, University of Maryland, College Park, MD 20742, USA eSchool of Physics, Southeast University, Nanjing 211189, China E-mail: [email protected], [email protected], [email protected], [email protected], [email protected] Abstract: The low-energy U(1)B−L gauge symmetry is well-motivated as part of beyond Standard Model physics related to neutrino mass generation. We show that a light B L gauge boson Z0 and the associated − U(1)B−L-breaking scalar ' can both be effectively searched for at high-intensity facilities such as the near detector complex of the Deep Underground Neutrino Experiment (DUNE). Without the scalar ', the Z0 −9 can be probed at DUNE up to mass of 1 GeV, with the corresponding gauge coupling gBL as low as 10 . In the presence of the scalar ' with gauge coupling to Z0, the DUNE capability of discovering the gauge 0 boson Z can be significantly improved, even by one order of magnitude in gBL, due to additional production from the decay ' Z0Z0. -
Lectures on BSM and Dark Matter Theory (2Nd Class)
Lectures on BSM and Dark Matter theory (2nd class) Stefania Gori UC Santa Cruz 15th annual Fermilab - CERN Hadron Collider Physics Summer School August 10-21, 2020 Twin Higgs models & the hierarchy problem SMA x SMB x Z2 Global symmetry of the scalar potential (e.g. SU(4)) The SM Higgs is a (massless) Nambu-Goldstone boson ~SM Higgs doublet Twin Higgs doublet S.Gori 23 Twin Higgs models & the hierarchy problem SMA x SMB x Z2 Global symmetry of the scalar potential (e.g. SU(4)) The SM Higgs is a (massless) Nambu-Goldstone boson ~SM Higgs doublet Twin Higgs doublet Loop corrections to the Higgs mass: HA HA HB HB yA yA yB yB top twin-top Loop corrections to mass are SU(4) symmetric no quadratically divergent corrections! S.Gori 23 Twin Higgs models & the hierarchy problem SMA x SMB x Z2 Global symmetry of the scalar potential (e.g. SU(4)) The SM Higgs is a (massless) Nambu-Goldstone boson ~SM Higgs doublet Twin Higgs doublet Loop corrections to the Higgs mass: HA HA HB HB SU(4) and Z2 are (softly) broken: yA yA yB yB top twin-top Loop corrections to mass are SU(4) symmetric no quadratically divergent corrections! S.Gori 23 Phenomenology of the twin Higgs A typical spectrum: Htwin Twin tops Twin W, Z SM Higgs Twin bottoms Twin taus Glueballs S.Gori 24 Phenomenology of the twin Higgs 1. Production of the twin Higgs The twin Higgs will mix with the 125 GeV Higgs with a mixing angle ~ v2 / f2 Because of this mixing, it can be produced as a SM Higgs boson (reduced rates!) A typical spectrum: Htwin Twin tops Twin W, Z SM Higgs Twin bottoms Twin taus Glueballs S.Gori 24 Phenomenology of the twin Higgs 1.