Search for new phenomena in high-mass final states with a photon and a jet from $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector

The ATLAS collaboration
No Journal Information, 2017

Abstract (data abstract)
A search is performed for new phenomena in events with a high-transverse momentum photon and jets collected in 36.7/fb of pp collisions at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider. The invariant mass distribution of the leading photon and jet is examined to look for a resonant production of new particles or the presence of new high-mass states beyond the Standard Model. No significant deviation is observed in the mass distribution from the background-only hypothesis and cross section limits for generic Gaussian-shaped resonances are extracted. Excited quarks hypothesized in the quark compositeness model and high-mass states predicted in the quantum black hole models with extra dimensions are also examined in the analysis. The observed data exclude, at 95% confidence level, mass range below 5.3 TeV for the excited quarks and 7.1 TeV (4.4 TeV) for the quantum black holes with six (one) extra dimensions in the Arkani-Hamed-Dimopoulos-Dvali (Randall-Sundrum) model.

  • Table 1

    Data from Page 19 of preprint

    10.17182/hepdata.78551.v1/t2

    Observed 95% CL upper limits on the production cross section times branching ratio to a photon and a quark or...

  • Table 2

    Data from Page 19 of preprint

    10.17182/hepdata.78551.v1/t3

    Observed 95% CL upper limits on the production cross section times branching ratio to a photon and a quark or...

  • Table 6

    Data from Page 11 of preprint

    10.17182/hepdata.78551.v1/t3

    Fiducial acceptance and selection efficiency for the excited quark model as a function of the excited-quark mass.

  • Table 3

    Data from Page 19 of preprint

    10.17182/hepdata.78551.v1/t4

    Observed 95% CL upper limits on the production cross section times branching ratio to a photon and a quark or...

  • Table 4

    Data from Page 11 of preprint

    10.17182/hepdata.78551.v1/t5

    Fiducial acceptance and selection efficiency for the ADD model as a function of M_th.

  • Table 5

    Data from Page 11 of preprint

    10.17182/hepdata.78551.v1/t6

    Fiducial acceptance and selection efficiency for the RS1 model as a function of M_th.

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