Measurement of the Semileptonic tt + γ Production Cross Section in pp Collisions at √s = 8 TeV
Journal of High Energy Physics 2017
CERN international group of authors, Viesturs Veckalns

A measurement of the cross section for top quark-antiquark (t t ¯) pairs produced in association with a photon in proton-proton collisions at s=8 TeV is presented. The analysis uses data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 19.7 fb 1 . The signal is defined as the production of a t t ¯ pair in association with a photon having a transverse energy larger than 25 GeV and an absolute pseudorapidity smaller than 1.44. The measurement is performed in the fiducial phase space corresponding to the semileptonic decay chain of the t t ¯ pair, and the cross section is measured relative to the inclusive t t ¯ pair production cross section. The fiducial cross section for associated t t ¯ pair and photon production is found to be 127 ±27 (stat+syst) fb per semileptonic final state. The measured value is in agreement with the theoretical prediction.[Figure not available: see fulltext.].


Keywords
Hadron-Hadron scattering (experiments), Top physics
DOI
10.1007/JHEP10(2017)006
Hyperlink
https://link.springer.com/article/10.1007%2FJHEP10%282017%29006

international group of authors, C., Veckalns, V. Measurement of the Semileptonic tt + γ Production Cross Section in pp Collisions at √s = 8 TeV. Journal of High Energy Physics, 2017, Vol.2017, Iss.10, pp.1-10. ISSN 1126-6708. Available from: doi:10.1007/JHEP10(2017)006

Publication language
English (en)
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