Search for new phenomena in photon+jet events collected in proton–proton collisions at √s = 8 TeV with the ATLAS detector

Article English UNKNOWN
Taylor, Frank E. (2013)
  • Publisher: Elsevier
  • Journal: volume 728, issue 0370-2693, pages 562-578 (issn: 0370-2693)
  • Subject: Particle Physics - Experiment | excited fermions; hadron colliders; millimeter; dimensions; hera | Excited Fermions | Millimeter | Hadron Colliders | 530 | QC | info:eu-repo/classification/ddc/ddc:530 | Settore FIS/04 - Fisica Nucleare e Subnucleare | High Energy Physics - Experiment | info:eu-repo/classification/arxiv/High Energy Physics::Experiment | Hera | Nuclear and High Energy Physics | Physik | info:eu-repo/classification/ddc/ddc:500.2 | Naturvetenskap | photon+jet events; proton–proton collisions; ATLAS detector | Science & Technology | Settore FIS/01 - Fisica Sperimentale | Natural Sciences | info:eu-repo/classification/arxiv/Astrophysics::High Energy Astrophysical Phenomena | 530 Physics | Dimensions
    arxiv: Astrophysics::High Energy Astrophysical Phenomena | High Energy Physics::Experiment

This Letter describes a model-independent search for the production of new resonances in photon + jet events using 20 inverse fb of proton--proton LHC data recorded with the ATLAS detector at a centre-of-mass energy of $\sqrt{s}$ = 8 TeV. The photon + jet mass distribution is compared to a background model fit from data; no significant deviation from the background-only hypothesis is found. Limits are set at 95% credibility level on generic Gaussian-shaped signals and two benchmark phenomena beyond the Standard Model: non-thermal quantum black holes and excited quarks. Non-thermal quantum black holes are excluded below masses of 4.6 TeV and excited quarks are excluded below masses of 3.5 TeV. This Letter describes a model-independent search for the production of new resonances in photon + jet events using 20 inverse fb of proton--proton LHC data recorded with the ATLAS detector at a centre-of-mass energy of sqrt(s) = 8 TeV. The photon + jet mass distribution is compared to a background model fit from data; no significant deviation from the background-only hypothesis is found. Limits are set at 95% credibility level on generic Gaussian-shaped signals and two benchmark phenomena beyond the Standard Model: non-thermal quantum black holes and excited quarks. Non-thermal quantum black holes are excluded below masses of 4.6 TeV and excited quarks are excluded below masses of 3.5 TeV. This Letter describes a model-independent search for the production of new resonances in photon + jet ( γ+jet ) events using 20 fb −1 of proton–proton LHC data recorded with the ATLAS detector at a centre-of-mass energy of s=8 TeV . The γ+jet mass distribution is compared to a background model fit from data; no significant deviation from the background-only hypothesis is found. Limits are set at 95% credibility level on generic Gaussian-shaped signals and two benchmark phenomena beyond the Standard Model: non-thermal quantum black holes and excited quarks. Non-thermal quantum black holes are excluded below masses of 4.6 TeV and excited quarks are excluded below masses of 3.5 TeV.
  • References (52)
    52 references, page 1 of 6

    [1] P. Meade, L. Randall, J. High Energy Phys. 0805 (2008) 003, arXiv:0708.3017 [hep-ph].

    [2] X. Calmet, W. Gong, S.D. Hsu, Phys. Lett. B 668 (2008), arXiv:0806.4605 [hep-ph].

    [3] D.M. Gingrich, J. Phys. G 37 (2010) 105008, arXiv:0912.0826 [hep-ph].

    [4] S. Bhattacharya, S.S. Chauhan, B.C. Choudhary, D. Choudhury, Phys. Rev. D 80 (2009) 015014, arXiv:0901.3927 [hep-ph].

    [5] U. Baur, M. Spira, P.M. Zerwas, Phys. Rev. D 42 (1990) 815.

    [6] O. Çakir, R. Mehdiyev, Phys. Rev. D 60 (1999) 034004.

    [7] J. Kang, M.A. Luty, J. High Energy Phys. 0911 (2009) 065, arXiv:0805.4642 [hep-ph].

    [8] S.P. Martin, Phys. Rev. D 83 (2011) 035019, arXiv:1012.2072 [hep-ph].

    [9] L.B. Okun, Nucl. Phys. B 173 (1980) 1.

    [10] L.A. Anchordoqui, H. Goldberg, S. Nawata, T.R. Taylor, Phys. Rev. D 78 (2008) 016005, arXiv:0804.2013 [hep-ph].

  • Metrics
    No metrics available
Share - Bookmark