Advertisement

Journal of High Energy Physics

, 2017:114 | Cite as

Tagging new physics with charm

  • S. Iwamoto
  • G. Lee
  • Y. Shadmi
  • Y. Weiss
Open Access
Regular Article - Theoretical Physics

Abstract

We propose a new variable, the charm fraction, for collider searches for new physics. We analyze this variable in the context of searches for simplified supersymmetry models with squarks, the gluino, and the bino, assuming that only the lightest massdegenerate squarks can be produced at the high-luminosity LHC. The charm fraction complements event counting and kinematic information, increasing the sensitivity of the searches for models with heavy gluinos, for which squark production is flavor-blind. If squarks are discovered at the LHC, this variable can help discriminate between different underlying models. In particular, with improved charm tagging, the charm fraction can provide information on the gluino mass, and in some scenarios, on whether this mass is within the reach of a future 100 TeV hadron collider.

Keywords

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]
    ATLAS collaboration, Performance and Calibration of the JetFitterCharm Algorithm for c-Jet Identification, ATL-PHYS-PUB-2015-001 (2015).
  2. [2]
    CMS collaboration, Identification of c-quark jets at the CMS experiment, CMS-PAS-BTV-16-001 (2016).
  3. [3]
    R. Mahbubani, M. Papucci, G. Perez, J.T. Ruderman and A. Weiler, Light Nondegenerate Squarks at the LHC, Phys. Rev. Lett. 110 (2013) 151804 [arXiv:1212.3328] [INSPIRE].ADSCrossRefGoogle Scholar
  4. [4]
    C.W. Kalderon, Searches for Scharms and Gluinos with the ATLAS Detector, Ph.D. Thesis, Oxford University, Oxford U.K. (2016).Google Scholar
  5. [5]
    CMS collaboration, Search for top squarks decaying to a charm quark and a neutralino in events with a jet and missing transverse momentum, CMS-PAS-SUS-13-009 (2014).
  6. [6]
    ATLAS collaboration, Search for Scalar Charm Quark Pair Production in pp Collisions at \( \sqrt{s}=8 \) TeV with the ATLAS Detector, Phys. Rev. Lett. 114 (2015) 161801 [arXiv:1501.01325] [INSPIRE].
  7. [7]
    C.G. Lester and D.J. Summers, Measuring masses of semiinvisibly decaying particles pair produced at hadron colliders, Phys. Lett. B 463 (1999) 99 [hep-ph/9906349] [INSPIRE].
  8. [8]
    T. Cohen et al., SUSY Simplified Models at 14, 33 and 100 TeV Proton Colliders, JHEP 04 (2014) 117 [arXiv:1311.6480] [INSPIRE].ADSCrossRefGoogle Scholar
  9. [9]
    T. Golling et al., Physics at a 100 TeV pp collider: beyond the Standard Model phenomena, CERN Yellow Report (2017) 441 [arXiv:1606.00947] [INSPIRE].
  10. [10]
    ATLAS collaboration, Search for Supersymmetry at the high luminosity LHC with the ATLAS experiment, ATL-PHYS-PUB-2014-010 (2014).
  11. [11]
    ATLAS collaboration, Further searches for squarks and gluinos in final states with jets and missing transverse momentum at \( \sqrt{s}=13 \) TeV with the ATLAS detector, ATLAS-CONF-2016-078 (2016).
  12. [12]
    A. Banfi, G.P. Salam and G. Zanderighi, Accurate QCD predictions for heavy-quark jets at the Tevatron and LHC, JHEP 07 (2007) 026 [arXiv:0704.2999] [INSPIRE].ADSCrossRefGoogle Scholar
  13. [13]
    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
  14. [14]
    NNPDF collaboration, R.D. Ball et al., Parton distributions with QED corrections, Nucl. Phys. B 877 (2013) 290 [arXiv:1308.0598] [INSPIRE].
  15. [15]
    T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 Physics and Manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].
  16. [16]
    S. Jadach, Z. Was, R. Decker and J.H. Kuhn, The tau decay library TAUOLA: Version 2.4, Comput. Phys. Commun. 76 (1993) 361 [INSPIRE].
  17. [17]
    DELPHES 3 collaboration, J. de Favereau et al., DELPHES 3, A modular framework for fast simulation of a generic collider experiment, JHEP 02 (2014) 057 [arXiv:1307.6346] [INSPIRE].
  18. [18]
    M. Cacciari, G.P. Salam and G. Soyez, The Anti-k(t) jet clustering algorithm, JHEP 04 (2008) 063 [arXiv:0802.1189] [INSPIRE].ADSCrossRefzbMATHGoogle Scholar
  19. [19]
    M. Cacciari, G.P. Salam and G. Soyez, FastJet User Manual, Eur. Phys. J. C 72 (2012) 1896 [arXiv:1111.6097] [INSPIRE].ADSCrossRefGoogle Scholar
  20. [20]
    W. Beenakker, R. Hopker, M. Spira and P.M. Zerwas, Squark and gluino production at hadron colliders, Nucl. Phys. B 492 (1997) 51 [hep-ph/9610490] [INSPIRE].
  21. [21]
    D. Gonçalves-Netto, D. López-Val, K. Mawatari, T. Plehn and I. Wigmore, Automated Squark and Gluino Production to Next-to-Leading Order, Phys. Rev. D 87 (2013) 014002 [arXiv:1211.0286] [INSPIRE].ADSGoogle Scholar
  22. [22]
    G. Perez, Y. Soreq, E. Stamou and K. Tobioka, Prospects for measuring the Higgs boson coupling to light quarks, Phys. Rev. D 93 (2016) 013001 [arXiv:1505.06689] [INSPIRE].ADSGoogle Scholar
  23. [23]
    D. d’Enterria, QCD at FCC, talk at 1st FCC Physics Workshop, Geneva Switzerland (2017), https://indico.cern.ch/event/550509/contributions/2413809/attachments/1397831/2134849/ dde_qcd_at_fcc_cern_jan17.pdf.
  24. [24]
    P. Ilten, N.L. Rodd, J. Thaler and M. Williams, Disentangling Heavy Flavor at Colliders, arXiv:1702.02947 [INSPIRE].
  25. [25]
    S.J. Brodsky, A. Kusina, F. Lyonnet, I. Schienbein, H. Spiesberger and R. Vogt, A review of the intrinsic heavy quark content of the nucleon, Adv. High Energy Phys. 2015 (2015) 231547 [arXiv:1504.06287] [INSPIRE].MathSciNetCrossRefGoogle Scholar
  26. [26]
    CMS collaboration, Measurement of associated Z + charm production in pp collisions at \( \sqrt{s}=8 \) TeV, CMS-PAS-SMP-15-009 (2016).
  27. [27]
    N. Ierushalmi, S. Iwamoto, G. Lee, V. Nepomnyashy and Y. Shadmi, LHC Benchmarks from Flavored Gauge Mediation, JHEP 07 (2016) 058 [arXiv:1603.02637] [INSPIRE].ADSCrossRefGoogle Scholar

Copyright information

© The Author(s) 2017

Authors and Affiliations

  1. 1.Physics DepartmentTechnion — Israel Institute of TechnologyHaifaIsrael

Personalised recommendations