Measurements of the pp → WZ inclusive and differential production cross sections and constraints on charged anomalous triple gauge couplings at √s = 13 TeV

• Autor(a) principal: Sirunyan, A. M.
• Data de Publicação: 2019
• Outros Autores: Silveira, Gustavo Gil da, CMS Collaboration
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/195842
• topic: Aceleradores de partículas; Colisões proton-proton; Bosons W; Bosons Z; Hadron-Hadron scattering (experiments); Particle and resonance production

The WZ production cross section is measured in proton-proton collisions at a centre-of-mass energy p s = 13TeV using data collected with the CMS detector, corresponding to an integrated luminosity of 35:9 fb1. The inclusive cross section is measured to be tot(pp ! WZ) = 48:09+1:00 0:96(stat)+0:44 0:37(theo)+2:39 2:17(syst) 1:39(lum) pb, resulting in a total uncertainty of 2:78/+2:98 pb. Fiducial cross section and ratios of charge-dependent cross section measurements are provided. Di erential cross section measurements are also presented with respect to three variables: the Z boson transverse momentum pT, the leading jet pT, and the M(WZ) variable, de ned as the invariant mass of the system composed of the three leptons and the missing transverse momentum. Di erential measurements with respect to the W boson pT, separated by charge, are also shown. Results are consistent with standard model predictions, favouring next-to-next-to-leading-order predictions over those at next-to-leading order. Constraints on anomalous triple gauge couplings are derived via a binned maximum likelihood t to the M(WZ) variable.