Measurement of the semileptonic t t ¯ + γ production cross section in pp collisions at √s=8 TeV

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Asilar, Ece and Md. Ali, Mohd. Adli (2017) Measurement of the semileptonic t t ¯ + γ production cross section in pp collisions at √s=8 TeV. Journal of High Energy Physics, 2017 (10). pp. 1-41. ISSN 1029-8479

	PDF - Published Version Restricted to Repository staff only Download (1MB) | Request a copy
	PDF (scopus) - Supplemental Material Restricted to Repository staff only Download (553kB) | Request a copy

Abstract

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 fb1. 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.].

Item Type:	Article (Journal)
Additional Information:	7861/63033
Uncontrolled Keywords:	Hadron-Hadron scattering (experiments) Top physics
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science
Depositing User:	Engku Norulizati Engku Aziz
Date Deposited:	07 May 2018 15:01
Last Modified:	11 Jul 2018 03:53
URI:	http://irep.iium.edu.my/id/eprint/63033

Actions (login required)

View Item