Measurement of the Z gamma production cross section in pp collisions at 8 TeV and search for anomalous triple gauge boson couplingsopen access
- Authors
- Khachatryan, V; Sirunyan, AM; Tumasyan, A; Adam, W; Bergauer, T; Dragicevic, M; Eroe, J; Fruhwirth, R; Ghete, VM; Kim, Tae Jeong
- Issue Date
- May-2015
- Publisher
- SPRINGER
- Keywords
- Hadron-Hadron Scattering
- Citation
- JOURNAL OF HIGH ENERGY PHYSICS, v.2015, no.4, pp.1 - 40
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF HIGH ENERGY PHYSICS
- Volume
- 2015
- Number
- 4
- Start Page
- 1
- End Page
- 40
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/142980
- DOI
- 10.1007/JHEP04(2015)164
- ISSN
- 1126-6708
- Abstract
- The cross section for the production of Z gamma in proton-proton collisions at 8 TeV is measured based on data collected by the CMS experiment at the LHC corresponding to an integrated luminosity of 19.5 fb(-1). Events with an oppositely-charged pair of muons or electrons together with an isolated photon are selected. The differential cross section as a function of the photon transverse momentum is measured inclusively and exclusively, where the exclusive selection applies a veto on central jets. The observed cross sections are compatible with the expectations of next-to-next-to-leading-order quantum chromodynamics. Limits on anomalous triple gauge couplings of ZZ gamma and Z gamma gamma are set that improve on previous experimental results obtained with the charged lepton decay modes of the Z boson.
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