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Bounds and prospects for stable multiply charged particles at the LHC

  • Sebastian Jäger
  • Sandra Kvedaraitė
  • Gilad Perez
  • Inbar SavorayEmail author
Open Access
Regular Article - Theoretical Physics
  • 18 Downloads

Abstract

Colored and colorless particles that are stable on collider scales and carry exotic electric charges, so-called Multiply-Charged Heavy Stable Particles (MCHSPs), exist in extensions of the Standard Model, and can include the top partner(s) in solutions of the hierarchy problem. To obtain bounds on color-triplets and color-singlets of charges up to |Q| = 8, we recast searches for signatures of two production channels: the “open” channel — where the particles are pair-produced above threshold, and are detectable in dedicated LHC searches for stable multiply charged leptons, and the “closed” channel — where a particle-antiparticle pair is produced as a bound state, detectable in searches for a diphoton resonance. We recast the open lepton searches by incorporating the relevant strong-interaction effects for color-triplets. In both open and closed production, we provide a careful assessment of photon-induced processes using the accurate LUXqed PDF, resulting in substantially weaker bounds than previously claimed in the literature for the colorless case. Our bounds for colored MCHSPs are shown for the first time, as the LHC experiments have not searched for them directly. Generally, we obtain nearly charge-independent lower mass limits of around 970 GeV (color-triplet scalar), 1200 GeV (color-triplet fermion), and 880-900 GeV (color-singlet fermion) from open production, and strongly charge-dependent limits from closed production. In all cases there is a cross-over between dominance by open and closed searches at some charge. We provide prospective bounds for \( \sqrt{s}=13 \) TeV LHC searches at integrated luminosities of 39.5 fb−1, 100 fb−1, and 300 fb−1. Moreover, we show that a joint observation in the open and the closed channels allows to determine the mass, spin, color, and electric charge of the particle.

Keywords

Phenomenological Models Supersymmetry Phenomenology 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

References

  1. [1]
    S.P. Martin, A Supersymmetry primer, hep-ph/9709356 [INSPIRE].
  2. [2]
    K. Agashe and G. Servant, Warped unification, proton stability and dark matter, Phys. Rev. Lett. 93 (2004) 231805 [hep-ph/0403143] [INSPIRE].
  3. [3]
    G.F. Giudice, Naturally Speaking: The Naturalness Criterion and Physics at the LHC, arXiv:0801.2562 [INSPIRE].
  4. [4]
    Y. Kats, M. McCullough, G. Perez, Y. Soreq and J. Thaler, Colorful Twisted Top Partners and Partnerium at the LHC, JHEP 06 (2017) 126 [arXiv:1704.03393] [INSPIRE].ADSCrossRefGoogle Scholar
  5. [5]
    Y. Kats and M.J. Strassler, Probing Colored Particles with Photons, Leptons and Jets, JHEP 11 (2012) 097 [Erratum ibid. 1607 (2016) 009] [arXiv:1204.1119] [INSPIRE].
  6. [6]
    A.C. Kraan, Interactions of heavy stable hadronizing particles, Eur. Phys. J. C 37 (2004) 91 [hep-ex/0404001] [INSPIRE].
  7. [7]
    ATLAS collaboration, Search for heavy long-lived charged R-hadrons with the ATLAS detector in 3.2 fb −1 of proton-proton collision data at \( \sqrt{s}=13 \) TeV, Phys. Lett. B 760 (2016) 647 [arXiv:1606.05129] [INSPIRE].
  8. [8]
    ATLAS collaboration, Searches for heavy long-lived charged particles with the ATLAS detector in proton-proton collisions at \( \sqrt{s}=8 \) TeV, JHEP 01 (2015) 068 [arXiv:1411.6795] [INSPIRE].
  9. [9]
    ATLAS collaboration, Searches for heavy long-lived sleptons and R-Hadrons with the ATLAS detector in pp collisions at \( \sqrt{s}=7 \) TeV, Phys. Lett. B 720 (2013) 277 [arXiv:1211.1597] [INSPIRE].
  10. [10]
    CMS collaboration, Search for long-lived charged particles in proton-proton collisions at \( \sqrt{s}=13 \) TeV, Phys. Rev. D 94 (2016) 112004 [arXiv:1609.08382] [INSPIRE].
  11. [11]
    CMS collaboration, Searches for Long-Lived Charged Particles in pp Collisions at \( \sqrt{s}=7 \) and 8 TeV, JHEP 07 (2013) 122 [arXiv:1305.0491] [INSPIRE].
  12. [12]
    CMS collaboration, Search for Heavy Stable Charged Particles in pp collisions at \( \sqrt{s}=7 \) TeV, JHEP 03 (2011) 024 [arXiv:1101.1645] [INSPIRE].
  13. [13]
    ATLAS collaboration, Search for heavy long-lived multi-charged particles in pp collisions at \( \sqrt{s}=8 \) TeV using the ATLAS detector, Eur. Phys. J. C 75 (2015) 362 [arXiv:1504.04188] [INSPIRE].
  14. [14]
    N.D. Barrie, A. Kobakhidze, S. Liang, M. Talia and L. Wu, Exotic Lepton Searches via Bound State Production at the LHC, Phys. Lett. B 781 (2018) 364 [arXiv:1710.11396] [INSPIRE].
  15. [15]
    A. Manohar, P. Nason, G.P. Salam and G. Zanderighi, How bright is the proton? A precise determination of the photon parton distribution function, Phys. Rev. Lett. 117 (2016) 242002 [arXiv:1607.04266] [INSPIRE].ADSCrossRefGoogle Scholar
  16. [16]
    NNPDF collaboration, Parton distributions with QED corrections, Nucl. Phys. B 877 (2013) 290 [arXiv:1308.0598] [INSPIRE].
  17. [17]
    Y. Kats and M.J. Strassler, Probing Colored Particles with Photons, Leptons and Jets, JHEP 11 (2012) 097 [Erratum ibid. 1607 (2016) 009] [arXiv:1204.1119] [INSPIRE].
  18. [18]
    A.V. Manohar, P. Nason, G.P. Salam and G. Zanderighi, The Photon Content of the Proton, JHEP 12 (2017) 046 [arXiv:1708.01256] [INSPIRE].ADSCrossRefGoogle Scholar
  19. [19]
    J. Alwall et al., The automated computation of tree-level and next-to-leading order differential cross sections and their matching to parton shower simulations, JHEP 07 (2014) 079 [arXiv:1405.0301] [INSPIRE].ADSCrossRefGoogle Scholar
  20. [20]
    T. Sjöstrand et al., An Introduction to PYTHIA 8.2, Comput. Phys. Commun. 191 (2015) 159 [arXiv:1410.3012] [INSPIRE].
  21. [21]
    T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 Physics and Manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].
  22. [22]
    CMS collaboration, Search for multi-charged Heavy Stable Charged Particles, CMS-PAS-EXO-11-090 (2011).
  23. [23]
    V. Veeraraghavan, Search for multiply charged Heavy Stable Charged Particles in data collected with the CMS detector, Ph.D. Thesis, Florida State University, Tallahassee U.S.A. (2013).Google Scholar
  24. [24]
    M. Konecki, The RPC based trigger for the CMS experiment at the LHC, 2014 JINST 9 C07002 [INSPIRE].
  25. [25]
    M. Tytgat et al., The Upgrade of the CMS RPC System during the First LHC Long Shutdown, PoS(RPC2012)063 [arXiv:1209.1979] [INSPIRE].
  26. [26]
    V. Gori, The CMS High Level Trigger, Int. J. Mod. Phys. Conf. Ser. 31 (2014) 1460297 [arXiv:1403.1500] [INSPIRE].
  27. [27]
    Particle Data Group collaboration, Review of Particle Physics, Chin. Phys. C 40 (2016) 100001 [INSPIRE].
  28. [28]
    Key Data for Ionizing-Radiation Dosimetry: Measurement Standards and Applications. Vol. 14, International Commission on Radiation Units and Measurements, Inc. (ICRU), Bethesda U.S.A. (2014). Results are taken from http://pdg.lbl.gov/2017/AtomicNuclearProperties/.
  29. [29]
    R. Mackeprang, Stable Heavy Hadrons in ATLAS, Ph.D. Thesis, Bohr Institute, Copenhagen Denmark (2007).Google Scholar
  30. [30]
    CMS collaboration, Performance of muon identification in pp collisions at S 0.5 = 7 TeV, CMS-PAS-MUO-10-002 (2010).
  31. [31]
    J. Pumplin, D.R. Stump, J. Huston, H.L. Lai, P.M. Nadolsky and W.K. Tung, New generation of parton distributions with uncertainties from global QCD analysis, JHEP 07 (2002) 012 [hep-ph/0201195] [INSPIRE].
  32. [32]
    K. Blum, A. Efrati, C. Frugiuele and Y. Nir, Exotic colored scalars at the LHC, JHEP 02 (2017) 104 [arXiv:1610.06582] [INSPIRE].ADSCrossRefGoogle Scholar
  33. [33]
    CMS collaboration, Search for physics beyond the standard model in the high-mass diphoton spectrum at 13 TeV, CMS-PAS-EXO-17-017 (2018).
  34. [34]
    S.P. Martin, Diphoton decays of stoponium at the Large Hadron Collider, Phys. Rev. D 77 (2008) 075002 [arXiv:0801.0237] [INSPIRE].
  35. [35]
    J.E. Younkin and S.P. Martin, QCD corrections to stoponium production at hadron colliders, Phys. Rev. D 81 (2010) 055006 [arXiv:0912.4813] [INSPIRE].
  36. [36]
    M. Beneke, J. Piclum, C. Schwinn and C. Wever, NNLL soft and Coulomb resummation for squark and gluino production at the LHC, JHEP 10 (2016) 054 [arXiv:1607.07574] [INSPIRE].ADSCrossRefGoogle Scholar
  37. [37]
    Y. Kats and M.D. Schwartz, Annihilation decays of bound states at the LHC, JHEP 04 (2010) 016 [arXiv:0912.0526] [INSPIRE].ADSCrossRefzbMATHGoogle Scholar
  38. [38]
    D.B. Clark, E. Godat and F.I. Olness, ManeParse: A Mathematica reader for Parton Distribution Functions, Comput. Phys. Commun. 216 (2017) 126 [arXiv:1605.08012] [INSPIRE].ADSCrossRefGoogle Scholar
  39. [39]
    ATLAS, CMS and The LHC Higgs Combination Group collaborations, Procedure for the LHC Higgs boson search combination in Summer 2011, CMS-NOTE-2011-005 (2011).
  40. [40]
    ATLAS collaboration, Measurement of the double-differential high-mass Drell-Yan cross section in pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, JHEP 08 (2016) 009 [arXiv:1606.01736] [INSPIRE].
  41. [41]
    E. Molinaro and N. Vignaroli, Diphoton Resonances at the LHC, Mod. Phys. Lett. A 32 (2017) 1730024 [arXiv:1707.00926] [INSPIRE].
  42. [42]
    ATLAS collaboration, Search for heavy long-lived multi-charged particles in proton-proton collisions at \( \sqrt{s}=13 \) TeV using the ATLAS detector, Submitted to: Phys. Rev. (2018) [arXiv:1812.03673] [INSPIRE].
  43. [43]
    CMS collaboration, Technical proposal for a MIP timing detector in the CMS experiment phase 2 upgrade, CERN-LHCC-2017-027 (2017).
  44. [44]
    Y. Vibhuti, S.N.L. Sirisha and B. Sonali, Study of Stopping Power for proton in different materialsA Geant4 Based Simulation, DAE Symp. Nucl. Phys. 57 (2012) 734 [INSPIRE].
  45. [45]
    CMS collaboration, RPC hit contribution to CMS muon reconstruction at LHC, Nucl. Instrum. Meth. A 718 (2013) 437 [INSPIRE].
  46. [46]
    CMS collaboration, Precise Mapping of the Magnetic Field in the CMS Barrel Yoke using Cosmic Rays, 2010 JINST 5 T03021 [arXiv:0910.5530] [INSPIRE].

Copyright information

© The Author(s) 2019

Authors and Affiliations

  • Sebastian Jäger
    • 1
  • Sandra Kvedaraitė
    • 1
  • Gilad Perez
    • 2
  • Inbar Savoray
    • 2
    Email author
  1. 1.Department of Physics and AstronomyUniversity of SussexBrightonU.K.
  2. 2.Department of Particle Physics and AstrophysicsWeizmann Institute of ScienceRehovotIsrael

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