Measurement of the cross section ratio sigma(t(t)over-barb(b)over-bar)/sigma(t(t)over-barjj) in pp collisions at root s=8 TeVopen access
- Authors
- Khachatryan, V; Sirunyan, AM; Tumasyan, A; Adam, W; Bergauer, T; Dragicevic, M; Eroe, J; Fabjan, C; Friedl, M; Kim, Tae Jeong
- Issue Date
- May-2015
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- CMS; Physics; Top physics
- Citation
- PHYSICS LETTERS B, v.746, pp.132 - 153
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICS LETTERS B
- Volume
- 746
- Start Page
- 132
- End Page
- 153
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/142983
- DOI
- 10.1016/j.physletb.2015.04.060
- ISSN
- 0370-2693
- Abstract
- The first measurement of the cross section ratio sigma(t (t) over barb (b) over bar)/sigma(t (t) over bar jj) is presented using a data sample corresponding to an integrated luminosity of 19.6 fb(-1) collected in pp collisions at root s = 8 TeV with the CMS detector at the LHC. Events with two leptons (e or mu) and four reconstructed jets, including two identified as b quark jets, in the final state are selected. The ratio is determined for a minimum jet transverse momentum p(T) of both 20 and 40 GeV/c. The measured ratio is 0.022 +/- 0.003 (stat) +/- 0.005 (syst) for p(T) ˃ 20GeV/c. The absolute cross sections sigma(t (t) over barb (b) over bar) and sigma(t (t) over bar jj) are also measured. The measured ratio for p(T) ˃ 40 GeV/c is compatible with a theoretical quantum chromodynamics calculation at next-to-leading order.
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