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Search for excited quarks of light and heavy flavor in γ  + jet final states in proton–proton collisions at √s = 13 TeV

CMS Collaboration; Sirunyan, A.M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V.M.; Grossmann, J.; Hrubec, J.; Jeitler, M.; König, A.; Krammer, N.; Krätschmer, I.; ... mehr

Abstract:
A search is presented for excited quarks of light and heavy flavor that decay to
γ+jet final states. The analysis is based on data corresponding to an integrated luminosity of 35.9
fb⁻¹ collected by the CMS experiment in proton–proton collisions at √s=13TeV at the LHC. A signal would appear as a resonant contribution to the invariant mass spectrum of the γ+jet system, above the background expected from standard model processes. No resonant excess is found, and upper limits are set on the product of the excited quark cross section and its branching fraction as a function of its mass. These are the most stringent limits to date in the γ+jet final state, and exclude excited light quarks with masses below 5.5 TeV and excited b quarks with masses below 1.8 TeV, assuming standard model like coupling strengths.

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Verlagsausgabe §
DOI: 10.5445/IR/1000083350
Veröffentlicht am 08.06.2018
Originalveröffentlichung
DOI: 10.1016/j.physletb.2018.04.007
Scopus
Zitationen: 3
Web of Science
Zitationen: 2
Coverbild
Zugehörige Institution(en) am KIT Institut für Experimentelle Kernphysik (IEKP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 0370-2693
urn:nbn:de:swb:90-833505
KITopen-ID: 1000083350
Erschienen in Physics letters / B
Band 781
Seiten 390–411
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Nachgewiesen in Scopus
Web of Science
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