Measurement of the Z gamma production cross section in pp collisions at 8 TeV and search for anomalous triple gauge boson couplings
JOURNAL OF HIGH ENERGY PHYSICS, sa.4, 2015 (SCI-Expanded)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: Sayı: 4
- Basım Tarihi: 2015
- Doi Numarası: 10.1007/jhep04(2015)164
- Dergi Adı: JOURNAL OF HIGH ENERGY PHYSICS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Anahtar Kelimeler: Hadron-Hadron Scattering, HADRON COLLIDERS, RECONSTRUCTION, E(+)E(-)
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
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.