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

doi:10.1016/j.physletb.2013.12.029

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

Abstract

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 $$ \sqrt{s}$$ = 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.

Publication Date:: Wed Jan 01 00:00:00 EST 2014

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE

Contributing Org.:: ATLAS Collaboration

OSTI Identifier:: 1209724

Alternate Identifier(s):: OSTI ID: 1523892

Grant/Contract Number:: AC02-05CH11231

Resource Type:: Published Article

Journal Name:: Physics Letters B

Additional Journal Information:: Journal Volume: 728; Journal Issue: C; Journal ID: ISSN 0370-2693

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Search for new phenomena in photon+jet events collected in proton–proton collisions at s=8 TeV with the ATLAS detector.  Netherlands: N. p., 2014. 
Web.  doi:10.1016/j.physletb.2013.12.029.

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                    Search for new phenomena in photon+jet events collected in proton–proton collisions at s=8 TeV with the ATLAS detector.  Netherlands.  https://doi.org/10.1016/j.physletb.2013.12.029

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                    Wed .  
"Search for new phenomena in photon+jet events collected in proton–proton collisions at s=8 TeV with the ATLAS detector".  Netherlands.  https://doi.org/10.1016/j.physletb.2013.12.029.

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@article{osti_1209724,

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

  author       = {},

  abstractNote = {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 $ \sqrt{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.},

  doi          = {10.1016/j.physletb.2013.12.029},

  journal      = {Physics Letters B},

  number       = C,

  volume       = 728,

  place        = {Netherlands},

  year         = {Wed Jan 01 00:00:00 EST 2014},

  month        = {Wed Jan 01 00:00:00 EST 2014}

}

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Figures / Tables:

Fig. 1: Invariant mass of the $γ$ + jet pair for events passing the final selections. The bin widths are chosen to be twice the mass resolution at the centre of each bin. Overlaid is the fitted background function integrated over each bin (solid line), with three examples of $q$^∗more »

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