DOCSLIB.ORG

Table of Contents (Print)

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Table of Contents (Print) PERIODICALS PHYSICAL REVIEW D Postmaster send address changes to: For editorial and subscription correspondence, PHYSICAL REVIEW D please see inside front cover APS Subscription Services „ISSN: 0556-2821… Suite 1NO1 2 Huntington Quadrangle Melville, NY 11747-4502 THIRD SERIES, VOLUME 69, NUMBER 7 CONTENTS D1 APRIL 2004 RAPID COMMUNICATIONS ϩ 0 ⌼ ϩ→ ␺ ϩ 0→ ␺ 0 Measurement of the B /B production ratio from the (4S) meson using B J/ K and B J/ KS decays (7 pages) ............................................................................ 071101͑R͒ B. Aubert et al. ͑BABAR Collaboration͒ Cabibbo-suppressed decays of Dϩ→␲ϩ␲0,KϩK¯ 0,Kϩ␲0 (5 pages) .................................. 071102͑R͒ K. Arms et al. ͑CLEO Collaboration͒ Ϯ→␹ Ϯ ͑ ͒ Measurement of the branching fraction for B c0K (7 pages) ................................... 071103R B. Aubert et al. ͑BABAR Collaboration͒ Generalized Ward identity and gauge invariance of the color-superconducting gap (5 pages) .............. 071501͑R͒ De-fu Hou, Qun Wang, and Dirk H. Rischke ARTICLES Measurements of ␺(2S) decays into vector-tensor final states (6 pages) ............................... 072001 J. Z. Bai et al. ͑BES Collaboration͒ Measurement of inclusive momentum spectra and multiplicity distributions of charged particles at ͱsϳ2 –5 GeV (7 pages) ................................................................... 072002 J. Z. Bai et al. ͑BES Collaboration͒ Production of ␲ϩ, ␲Ϫ, Kϩ, KϪ, p, and ¯p in light ͑uds͒, c, and b jets from Z0 decays (26 pages) ........ 072003 Koya Abe et al. ͑SLD Collaboration͒ Heavy flavor properties of jets produced in pp¯ interactions at ͱsϭ1.8 TeV (21 pages) .................. 072004 D. Acosta et al. ͑CDF Collaboration͒ Electric charge and magnetic moment of a massive neutrino (21 pages) ............................... 073001 Maxim Dvornikov and Alexander Studenikin ␶→␲␲␲␯␶ decays in the resonance effective theory (13 pages) ..................................... 073002 D. Go´mez Dumm, A. Pich, and J. Portole´s Radiative corrections to neutrino mixing and CP violation in the minimal seesaw model with leptogenesis (11 pages) ...................................................................... 073003 Jian-wei Mei and Zhi-zhong Xing Neutrino masses, mixing and new physics effects (13 pages) ........................................ 073004 J. A. Aguilar-Saavedra, G. C. Branco, and F. R. Joaquim Electroweak radiative corrections to deep-inelastic neutrino scattering: Implications for NuTeV? (10 pages) ......................................................................... 073005 K.-P. O. Diener, S. Dittmaier, and W. Hollik Day-night effect in solar neutrino oscillations with three flavors (9 pages) ............................. 073006 Mattias Blennow, Tommy Ohlsson, and Ha˚kan Snellman Two-loop renormalization of the electric charge in the standard model (9 pages) ........................ 073007 Giuseppe Degrassi and Alessandro Vicini Copyright 2004 by The American Physical Society (Continued) CONTENTS - Continued PHYSICAL REVIEW D THIRD SERIES, VOLUME 69, NUMBER 7 D1 APRIL 2004 Bounds on the magnetic moment and the electric dipole moment of the ␶ neutrino via the process eϩeϪ→␯␯¯ ␥ (7 pages) ................................................................ 073008 A. Gutie´rrez-Rodr´ıguez, M. A. Herna´ndez-Ru´ız, and A. Del Rio–De Santiago Effects of the neutrino B term on slepton mixing and electric dipole moments (6 pages) ................. 073009 Yasaman Farzan Leptogenesis in the type III seesaw mechanism (6 pages) .......................................... 073010 Carl H. Albright and S. M. Barr New window on strange quark matter as the ground state of strongly interacting matter (9 pages) .......... 074001 Vikram Soni and Dipankar Bhattacharya B→␩(␩Ј)K(␲) in the standard model with flavor symmetry (6 pages) ............................... 074002 Han-Kuei Fu, Xiao-Gang He, and Yu-Kuo Hsiao Analytical approach to chiral symmetry breaking in Minkowski space (7 pages) ........................ 074003 Pedro Bicudo Magnetic moment of the ⌰ϩ pentaquark state (8 pages) ........................................... 074004 P.-Z. Huang, W.-Z. Deng, X.-L. Chen, and Shi-Lin Zhu Low-energy universality and the new charmonium resonance at 3870 MeV (8 pages) .................... 074005 Eric Braaten and Masaoki Kusunoki Quark-hadron duality and scaling in reduced QCD (30 pages) ....................................... 074006 Zolta´n Batiz and Franz Gross Virtual and bremsstrahlung corrections to b→dlϩlϪ in the standard model (21 pages) ................... 074007 H. M. Asatrian, K. Bieri, C. Greub, and M. Walker Scalar meson dynamics in chiral perturbation theory (7 pages) ...................................... 074008 Albert Bramon, Rafel Escribano, and Jose´ Lu´ıs Lucio Mart´ınez Confinement from merons (4 pages) ............................................................ 074009 F. Lenz, J. W. Negele, and M. Thies Universal light quark mass dependence and heavy-light meson spectroscopy (6 pages) ................... 074010 Theodore J. Allen, Todd Coleman, M. G. Olsson, and Sinisˇa Veseli Determining the proximity of ␥*N scattering to the black body limit using deep inelastic scattering and J/␺ production (13 pages) ........................................................................ 074011 T. Rogers, X. Zu, V. Guzey, and M. Strikman Thermal fluctuations of gauge fields and first order phase transitions in color superconductivity (10 pages) .................................................................. 074012 Taeko Matsuura, Kei Iida, Tetsuo Hatsuda, and Gordon Baym Scalar and pseudoscalar Higgs boson plus one jet production at the CERN LHC and Fermilab Tevatron (10 pages) ......................................................................... 074013 B. Field, S. Dawson, and J. Smith Quark imaging in the proton via quantum phase-space distributions (12 pages) ......................... 074014 A.V. Belitsky, Xiangdong Ji, and Feng Yuan ¯ → ␯ Subleading shape function contributions to the hadronic invariant mass spectrum in B Xul¯ l decay (15 pages) ............................................................................ 074015 Craig N. Burrell, Michael E. Luke, and Alexander R. Williamson ⌰ϩ baryon production in KN and NN reactions (7 pages) .......................................... 074016 Yongseok Oh, Hungchong Kim, and Su Houng Lee Effects of an extra U(1) axial condensate on the radiative decay ␩Ј→␥␥ at finite temperature (6 pages) ........................................................................ 074017 E. Meggiolaro Universal extra dimensions and Kaluza-Klein bound states (10 pages) ................................ 074018 Christopher D. Carone, Justin M. Conroy, Marc Sher, and Ismail Turan Screened potential and the baryon spectrum (7 pages) ............................................. 074019 J. Vijande, P. Gonza´lez, H. Garcilazo, and A. Valcarce (Continued) CONTENTS - Continued PHYSICAL REVIEW D THIRD SERIES, VOLUME 69, NUMBER 7 D1 APRIL 2004 More model-independent analysis of b→s processes (17 pages) ..................................... 074020 Gudrun Hiller and Frank Kru¨ger Associated production of a Z boson and a single heavy-quark jet (6 pages) ............................ 074021 J. Campbell, R. K. Ellis, F. Maltoni, and S. Willenbrock Diffractive photon dissociation in the saturation regime from the Good-Walker picture (13 pages) .......... 074022 Ste´phane Munier and Arif Shoshi ϩ Ϫ a0K K vertex in light cone QCD sum rules (5 pages) ............................................ 074023 A. Gokalp and O. Yilmaz Eigenvalue decomposition of meson correlators (7 pages) .......................................... 074024 Thomas DeGrand Covariant light-front approach for s-wave and p-wave mesons: Its application to decay constants and form factors (39 pages) ........................................................................... 074025 Hai-Yang Cheng, Chun-Khiang Chua, and Chien-Wen Hwang Two-hadron semi-inclusive production including subleading twist contributions (13 pages) ............... 074026 Alessandro Bacchetta and Marco Radici Exclusive Higgs boson production with bottom quarks at hadron colliders (14 pages) .................... 074027 S. Dawson, C. B. Jackson, L. Reina, and D. Wackeroth Nuclear parton distributions at next to leading order (9 pages) ....................................... 074028 D. de Florian and R. Sassot Realization of chiral symmetry in the domain model of QCD (23 pages) .............................. 074029 Alex C. Kalloniatis and Sergei N. Nedelko Exotic baryons and the large-Nc expansion (19 pages) ............................................. 074030 P. V. Pobylitsa Confinement and gluon propagator in Coulomb gauge QCD (14 pages) ............................... 074031 Adam P. Szczepaniak Sivers effect and generalized parton distributions in impact parameter space (8 pages) ................... 074032 Matthias Burkardt and Dae Sung Hwang ␲␲ → ␲␲ invariant mass spectrum in VЈ V and the f 0(600) pole (9 pages) ............................ 074033 A. Gallegos, J. L. Lucio M, and J. Pestieau One-loop matching of the heavy-light A0 and V0 currents with nonrelativistic QCD heavy and improved naive light quarks (12 pages) ....................................................................... 074501 Emel Gulez, Junko Shigemitsu, and Matthew Wingate Quenched lattice QCD with domain wall fermions and the chiral limit (39 pages) ....................... 074502 T. Blum, P. Chen, N. Christ, C. Cristian, C. Dawson, G. Fleming, A. Kaehler,
Load more

Recommended publications
  • Constraints from Electric Dipole Moments on Chargino Baryogenesis in the Minimal Supersymmetric Standard Model
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by National Tsing Hua University Institutional Repository PHYSICAL REVIEW D 66, 116008 ͑2002͒ Constraints from electric dipole moments on chargino baryogenesis in the minimal supersymmetric standard model Darwin Chang NCTS and Physics Department, National Tsing-Hua University, Hsinchu 30043, Taiwan, Republic of China and Theory Group, Lawrence Berkeley Lab, Berkeley, California 94720 We-Fu Chang NCTS and Physics Department, National Tsing-Hua University, Hsinchu 30043, Taiwan, Republic of China and TRIUMF Theory Group, Vancouver, British Columbia, Canada V6T 2A3 Wai-Yee Keung NCTS and Physics Department, National Tsing-Hua University, Hsinchu 30043, Taiwan, Republic of China and Physics Department, University of Illinois at Chicago, Chicago, Illinois 60607-7059 ͑Received 9 May 2002; revised 13 September 2002; published 27 December 2002͒ A commonly accepted mechanism of generating baryon asymmetry in the minimal supersymmetric standard model ͑MSSM͒ depends on the CP violating relative phase between the gaugino mass and the Higgsino ␮ term. The direct constraint on this phase comes from the limit of electric dipole moments ͑EDM’s͒ of various light fermions. To avoid such a constraint, a scheme which assumes that the first two generation sfermions are very heavy is usually evoked to suppress the one-loop EDM contributions. We point out that under such a scheme the most severe constraint may come from a new contribution to the electric dipole moment of the electron, the neutron, or atoms via the chargino sector at the two-loop level. As a result, the allowed parameter space for baryogenesis in the MSSM is severely constrained, independent of the masses of the first two generation sfermions.
    [Show full text]
  • Study of $ S\To D\Nu\Bar {\Nu} $ Rare Hyperon Decays Within the Standard
    Study of s dνν¯ rare hyperon decays in the Standard Model and new physics → Xiao-Hui Hu1 ∗, Zhen-Xing Zhao1 † 1 INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, MOE Key Laboratory for Particle Physics, Astrophysics and Cosmology, School of Physics and Astronomy, Shanghai Jiao-Tong University, Shanghai 200240, P.R. China FCNC processes offer important tools to test the Standard Model (SM), and to search for possible new physics. In this work, we investigate the s → dνν¯ rare hyperon decays in SM and beyond. We 14 11 find that in SM the branching ratios for these rare hyperon decays range from 10− to 10− . When all the errors in the form factors are included, we find that the final branching fractions for most decay modes have an uncertainty of about 5% to 10%. After taking into account the contribution from new physics, the generalized SUSY extension of SM and the minimal 331 model, the decay widths for these channels can be enhanced by a factor of 2 ∼ 7. I. INTRODUCTION The flavor changing neutral current (FCNC) transitions provide a critical test of the Cabibbo-Kobayashi-Maskawa (CKM) mechanism in the Standard Model (SM), and allow to search for the possible new physics. In SM, FCNC transition s dνν¯ proceeds through Z-penguin and electroweak box diagrams, and thus the decay probablitities are strongly→ suppressed. In this case, a precise study allows to perform very stringent tests of SM and ensures large sensitivity to potential new degrees of freedom. + + 0 A large number of studies have been performed of the K π νν¯ and KL π νν¯ processes, and reviews of these two decays can be found in [1–6].
    [Show full text]
  • Thesissubmittedtothe Florida State University Department of Physics in Partial Fulfillment of the Requirements for Graduation with Honors in the Major
    Florida State University Libraries 2016 Search for Electroweak Production of Supersymmetric Particles with two photons, an electron, and missing transverse energy Paul Myles Eugenio Follow this and additional works at the FSU Digital Library. For more information, please contact [email protected] ASEARCHFORELECTROWEAK PRODUCTION OF SUPERSYMMETRIC PARTICLES WITH TWO PHOTONS, AN ELECTRON, AND MISSING TRANSVERSE ENERGY Paul Eugenio Athesissubmittedtothe Florida State University Department of Physics in partial fulfillment of the requirements for graduation with Honors in the Major Spring 2016 2 Abstract A search for Supersymmetry (SUSY) using a final state consisting of two pho- tons, an electron, and missing transverse energy. This analysis uses data collected by the Compact Muon Solenoid (CMS) detector from proton-proton collisions at a center of mass energy √s =13 TeV. The data correspond to an integrated luminosity of 2.26 fb−1. This search focuses on a R-parity conserving model of Supersymmetry where electroweak decay of SUSY particles results in the lightest supersymmetric particle, two high energy photons, and an electron. The light- est supersymmetric particle would escape the detector, thus resulting in missing transverse energy. No excess of missing energy is observed in the signal region of MET>100 GeV. A limit is set on the SUSY electroweak Chargino-Neutralino production cross section. 3 Contents 1 Introduction 9 1.1 Weakly Interacting Massive Particles . ..... 10 1.2 SUSY ..................................... 12 2 CMS Detector 15 3Data 17 3.1 ParticleFlowandReconstruction . .. 17 3.1.1 ECALClusteringandR9. 17 3.1.2 Conversion Safe Electron Veto . 18 3.1.3 Shower Shape . 19 3.1.4 Isolation .
    [Show full text]
  • Jhep11(2016)148
    Published for SISSA by Springer Received: August 9, 2016 Revised: October 28, 2016 Accepted: November 20, 2016 Published: November 24, 2016 JHEP11(2016)148 Split NMSSM with electroweak baryogenesis S.V. Demidov,a;b D.S. Gorbunova;b and D.V. Kirpichnikova aInstitute for Nuclear Research of the Russian Academy of Sciences, 60th October Anniversary prospect 7a, Moscow 117312, Russia bMoscow Institute of Physics and Technology, Institutsky per. 9, Dolgoprudny 141700, Russia E-mail: [email protected], [email protected], [email protected] Abstract: In light of the Higgs boson discovery and other results of the LHC we re- consider generation of the baryon asymmetry in the split Supersymmetry model with an additional singlet superfield in the Higgs sector (non-minimal split SUSY). We find that successful baryogenesis during the first order electroweak phase transition is possible within a phenomenologically viable part of the model parameter space. We discuss several phenomenological consequences of this scenario, namely, predictions for the electric dipole moments of electron and neutron and collider signatures of light charginos and neutralinos. Keywords: Supersymmetry Phenomenology ArXiv ePrint: 1608.01985 Open Access, c The Authors. doi:10.1007/JHEP11(2016)148 Article funded by SCOAP3. Contents 1 Introduction1 2 Non-minimal split supersymmetry3 3 Predictions for the Higgs boson mass5 4 Strong first order EWPT8 JHEP11(2016)148 5 Baryon asymmetry9 6 EDM constraints and light chargino phenomenology 12 7 Conclusion 13 A One loop corrections to Higgs mass in split NMSSM 14 A.1 Tree level potential of scalar sector in the broken phase 14 A.2 Chargino-neutralino sector of split NMSSM 16 A.3 One-loop correction to Yukawa coupling of top quark 17 1 Introduction Any phenomenologically viable particle physics model should explain the observed asym- metry between matter and antimatter in the Universe.
    [Show full text]
  • Mass Degeneracy of the Higgsinos
    CERN–TH/95–337 Mass Degeneracy of the Higgsinos Gian F. Giudice1 and Alex Pomarol Theory Division, CERN CH-1211 Geneva 23, Switzerland Abstract The search for charginos and neutralinos at LEP2 can become problematic if these particles are almost mass degenerate with the lightest neutralino. Unfortunately this is the case in the region where these particles are higgsino-like. We show that, in this region, radiative corrections to the higgsino mass splittings can be as large as the tree-level values, if the mixing between the two stop states is large. We also show that the degree of degeneracy of the higgsinos substantially increases if a large phase is present in the higgsino mass term µ. CERN–TH/95–337 December 1995 1On leave of absence from INFN Sezione di Padova, Padua, Italy. The search for charginos (˜χ+) at LEP2 is one of the most promising ways of discovering low-energy supersymmetry. If theχ ˜+ decays into the lightest neutralino (˜χ0) and a virtual W +, it can be discovered at LEP2 (with a L = 500 pb−1) whenever its production cross R section is larger than about 0.1–0.3pbandmχ˜0 is within the range mχ˜0 ∼> 20 GeV and mχ˜+ − mχ˜0 ∼> 5–10 GeV [1]. Therefore, the chargino can be discovered almost up to the LEP2 kinematical limit, unless one of the following three conditions occurs: i) The sneutrino (˜ν) is light and the chargino is mainly gaugino-like. In this case theν ˜ t-channel exchange interferes destructively with the gauge-boson exchange and can reduce the chargino production cross section below the minimum values required for observability, 0.1–0.3 pb.
    [Show full text]
  • Table of Contents (Print)
    PERIODICALS PHYSICAL REVIEW D Postmaster send address changes to: For editorial and subscription correspondence, American Institute of Physics please see inside front cover 500 Sunnyside Boulevard (ISSN: 0556-2821) Woodbury, NY 11797-2999 THIRD SERIES, VOLUME 55, NUMBER 3 CONTENTS 1 FEBRUARY 1997 RAPID COMMUNICATIONS Search for f mesons in t lepton decay ............................................................. R1119 P. Avery et al. ~CLEO Collaboration! Is factorization for isolated photon cross sections broken? .............................................. R1124 P. Aurenche, M. Fontannaz, J. Ph. Guillet, A. Kotikov, and E. Pilon Long distance contribution to D pl1l2 ........................................................... R1127 Paul Singer and Da-Xin Zhang→ Forward scattering amplitude of virtual longitudinal photons at zero energy ............................... R1130 B. L. Ioffe Improving flavor symmetry in the Kogut-Susskind hadron spectrum ...................................... R1133 Tom Blum, Carleton DeTar, Steven Gottlieb, Kari Rummukainen, Urs M. Heller, James E. Hetrick, Doug Toussaint, R. L. Sugar, and Matthew Wingate Anomalous U~1!-mediated supersymmetry breaking, fermion masses, and natural suppression of FCNC and CP-violating effects ............................................................................. R1138 R. N. Mohapatra and Antonio Riotto ARTICLES 0 Observation of L b J/c L at the Fermilab proton-antiproton collider .................................... 1142 F. Abe et al.→~CDF Collaboration! Measurement of the branching ratios c8 e1e2, c8 J/cpp, and c8 J/ch ............................ 1153 T. A. Armstrong et al. ~Fermilab→ E760 Collaboration→ ! → Measurement of the differences in the total cross section for antiparallel and parallel longitudinal spins and a measurement of parity nonconservation with incident polarized protons and antiprotons at 200 GeV/c .......... 1159 D. P. Grosnick et al. ~E581/704 Collaboration! Statistical properties of the linear s model used in dynamical simulations of DCC formation ................
    [Show full text]
  • Supersymmetric Particle Searches
    Citation: K.A. Olive et al. (Particle Data Group), Chin. Phys. C38, 090001 (2014) (URL: http://pdg.lbl.gov) Supersymmetric Particle Searches A REVIEW GOES HERE – Check our WWW List of Reviews A REVIEW GOES HERE – Check our WWW List of Reviews SUPERSYMMETRIC MODEL ASSUMPTIONS The exclusion of particle masses within a mass range (m1, m2) will be denoted with the notation “none m m ” in the VALUE column of the 1− 2 following Listings. The latest unpublished results are described in the “Supersymmetry: Experiment” review. A REVIEW GOES HERE – Check our WWW List of Reviews CONTENTS: χ0 (Lightest Neutralino) Mass Limit 1 e Accelerator limits for stable χ0 − 1 Bounds on χ0 from dark mattere searches − 1 χ0-p elastice cross section − 1 eSpin-dependent interactions Spin-independent interactions Other bounds on χ0 from astrophysics and cosmology − 1 Unstable χ0 (Lighteste Neutralino) Mass Limit − 1 χ0, χ0, χ0 (Neutralinos)e Mass Limits 2 3 4 χe ,eχ e(Charginos) Mass Limits 1± 2± Long-livede e χ± (Chargino) Mass Limits ν (Sneutrino)e Mass Limit Chargede Sleptons e (Selectron) Mass Limit − µ (Smuon) Mass Limit − e τ (Stau) Mass Limit − e Degenerate Charged Sleptons − e ℓ (Slepton) Mass Limit − q (Squark)e Mass Limit Long-livede q (Squark) Mass Limit b (Sbottom)e Mass Limit te (Stop) Mass Limit eHeavy g (Gluino) Mass Limit Long-lived/lighte g (Gluino) Mass Limit Light G (Gravitino)e Mass Limits from Collider Experiments Supersymmetrye Miscellaneous Results HTTP://PDG.LBL.GOV Page1 Created: 8/21/2014 12:57 Citation: K.A. Olive et al.
    [Show full text]
  • Introduction to Supersymmetry
    Introduction to Supersymmetry Pre-SUSY Summer School Corpus Christi, Texas May 15-18, 2019 Stephen P. Martin Northern Illinois University [email protected] 1 Topics: Why: Motivation for supersymmetry (SUSY) • What: SUSY Lagrangians, SUSY breaking and the Minimal • Supersymmetric Standard Model, superpartner decays Who: Sorry, not covered. • For some more details and a slightly better attempt at proper referencing: A supersymmetry primer, hep-ph/9709356, version 7, January 2016 • TASI 2011 lectures notes: two-component fermion notation and • supersymmetry, arXiv:1205.4076. If you find corrections, please do let me know! 2 Lecture 1: Motivation and Introduction to Supersymmetry Motivation: The Hierarchy Problem • Supermultiplets • Particle content of the Minimal Supersymmetric Standard Model • (MSSM) Need for “soft” breaking of supersymmetry • The Wess-Zumino Model • 3 People have cited many reasons why extensions of the Standard Model might involve supersymmetry (SUSY). Some of them are: A possible cold dark matter particle • A light Higgs boson, M = 125 GeV • h Unification of gauge couplings • Mathematical elegance, beauty • ⋆ “What does that even mean? No such thing!” – Some modern pundits ⋆ “We beg to differ.” – Einstein, Dirac, . However, for me, the single compelling reason is: The Hierarchy Problem • 4 An analogy: Coulomb self-energy correction to the electron’s mass A point-like electron would have an infinite classical electrostatic energy. Instead, suppose the electron is a solid sphere of uniform charge density and radius R. An undergraduate problem gives: 3e2 ∆ECoulomb = 20πǫ0R 2 Interpreting this as a correction ∆me = ∆ECoulomb/c to the electron mass: 15 0.86 10− meters m = m + (1 MeV/c2) × .
    [Show full text]
  • Study of the Rare Hyperon Decays in the Standard Model and New Physics*
    Chinese Physics C Vol. 43, No. 9 (2019) 093104 Study of the s ! dνν¯ rare hyperon decays in the Standard Model and new physics* 1) 2) Xiao-Hui Hu(胡晓会) Zhen-Xing Zhao(赵振兴) INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, MOE Key Laboratory for Particle Physics, Astrophysics and Cosmology, School of Physics and Astronomy, Shanghai Jiao-Tong University, Shanghai 200240, China Abstract: FCNC processes offer important tools to test the Standard Model (SM) and to search for possible new physics. In this work, we investigate the s ! dνν¯ rare hyperon decays in SM and beyond. We find that in SM the branching ratios for these rare hyperon decays range from 10−14 to 10−11 . When all the errors in the form factors are included, we find that the final branching ratios for most decay modes have an uncertainty of about 5% to 10%. After taking into account the contribution from new physics, the generalized SUSY extension of SM and the minimal 331 model, the decay widths for these channels can be enhanced by a factor of 2 ∼ 7. Keywords: branching ratios, rare hyperon decays, form factors, light-front approach, new physics PACS: 12.39.-x, 12.60.-i DOI: 10.1088/1674-1137/43/9/093104 1 Introduction flight technique, and the corresponding observed upper limit is [8] : B + ! π+νν < × −10; : The flavor changing neutral current (FCNC) trans- (K ¯)exp 14 10 at 95% CL (3) itions provide a critical test of the Cabibbo-Kobayashi- Similarly, the E391a collaboration reported the 90% C.L. Maskawa (CKM) mechanism in the Standard Model upper bound [9] (SM), and allow to search for possible new physics.
    [Show full text]
  • Chargino Production in Different Supergravity Models and the Effect
    IC/96/189 SHEP–96–24 hep-ph/9609472 September 1996 Chargino Production in Different Supergravity Models and the Effect of the Tadpoles Marco Aurelio D´ıaz High Energy Section, International Centre for Theoretical Physics P. O. Box 586, Trieste 34100, Italy Abstract If the lightest chargino is discovered at LEP2, the measurement of its mass and cross section together with the mass of the lightest neutralino, enables the determination of the parameters that define the theory and the entire supersym- metric and Higgs spectrum. Within this context, we: (i) study the effect of the one–loop tadpoles in the minimization condition of the Higgs potential, by com- paring the RGE–improved Higgs potential approximation with the calculation arXiv:hep-ph/9609472v1 25 Sep 1996 of the minimum including the effect of the one–loop tadpoles, and (ii) compare the prediction of two different supergravity models, namely, the model based on B = 2m0 and motivated by the solution of the µ–problem, and the minimal supergravity model, based on A = B + m0. 1 Introduction Chargino searches at LEP1.5 at 130GeV < √s< 140 GeV center of mass energy have been negative, and new exclusion regions in the m ± m 0 plane have been published χ1 − χ1 0 [1]. For example, if mχ1 = 40 GeV and if mν˜e > 200 GeV, the chargino mass satisfy m ± > 65 GeV at 95 % C.L. Nevertheless, this bound on the chargino mass is relaxed χ1 if the lightest neutralino mass is close to the chargino mass, or if the sneutrino is lighter than 200 GeV.
    [Show full text]
  • MSSM Parameter Determination Via Chargino Production at the LC: NLO
    MSSM parameter determination via chargino produc- tion at the LC: NLO corrections Aoife Bharucha1, Jan Kalinowski2;3, Gudrid Moortgat-Pick1;2, Krzysztof Rolbiecki2 and Georg Weiglein2 1II. Institut f¨urTheoretische Physik, Universit¨atHamburg, Luruper Chaussee 149, D-22761 Hamburg, Ger- many 2DESY, Notkestraße 85, 22607 Hamburg, Germany 3Faculty of Physics, Uniwersytet Warszawski, 00681 Warsaw, Poland DOI: will be assigned Very precise measurements of masses and cross sections, with errors of < 1%, are expected to be achiev- able with a future linear collider. Such an accuracy gives sensitivity at the level of quantum corrections, which therefore must be incorporated in order to make meaningful predictions for the underlying new physics parameters. For the chargino{neutralino sector, this involves fitting one-loop predictions to expected measurements of the cross sections and forward-backward asymmetries and of the accessible chargino and neutralino masses. Our analysis shows how an accurate determination of the desired pa- rameters is possible, providing in addition access to the mass of the lighter stop. DESY 12-141 1 Introduction A linear collider (LC) will be an ideal environment for high precision studies of physics beyond the standard model (BSM). A particularly well-motivated BSM theory is the Minimal Supersymmetric Standard Model (MSSM). Fits to the latest LHC data, see e.g. [1], suggest that, if nature can indeed be described in terms of the MSSM, charginos and neutralinos could be among the lighter supersymmetric (SUSY) particles, and therefore we investigate what the LC can reveal about the structure of the chargino{neutralino sector of the MSSM. At leading order (LO), the chargino{neutralino sector can be parameterised via the gaugino masses M1 and M2, the higgsino mass µ and tan β, the ratio of the vacuum expectation values of the two neutral Higgs doublet fields, see e.g.
    [Show full text]
  • Arxiv:1710.09941V2 [Hep-Ph]
    EPJ manuscript No. (will be inserted by the editor) March 8, 2018 MS-TP-17-14 Realistic simplified gaugino-higgsino models in the MSSM Benjamin Fuks1;2;3a, Michael Klasen4b, Saskia Schmiemann4c and Marthijn Sunder4d 1 Sorbonne Universit´es,Universit´ePierre et Marie Curie (Paris 06), UMR 7589, LPTHE, F-75005 Paris, France 2 CNRS, UMR 7589, LPTHE, F-75005, Paris, France 3 Institut Universitaire de France, 103 boulevard Saint-Michel, F-75005 Paris, France 4 Institut f¨urTheoretische Physik, Westf¨alische Wilhelms-Universit¨atM¨unster, Wilhelm-Klemm-Straße 9, D-48149 M¨unster,Germany Abstract. We present simplified MSSM models for light neutralinos and charginos with realistic mass spectra and realistic gaugino-higgsino mixing, that can be used in experimental searches at the LHC. The formerly used naive approach of defining mass spectra and mixing matrix elements manually and independently of each other does not yield genuine MSSM benchmarks. We suggest the use of less simplified, but realistic MSSM models, whose mass spectra and mixing matrix elements are the result of a proper matrix diagonalisation. We propose a novel strategy targeting the design of such benchmark scenarios, accounting for user-defined constraints in terms of masses and particle mixing. We apply it to the higgsino case and implement a scan in the four relevant underlying parameters fµ, tan β; M1;M2g for a given set of light neutralino and chargino masses. We define a measure for the quality of the obtained benchmarks, that also includes criteria to assess the higgsino content of the resulting charginos and neutralinos. We finally discuss the distribution of the resulting models in the MSSM parameter space as well as their implications for supersymmetric dark matter phenomenology.
    [Show full text]