Measurement of the Azimuthal Angle Dependence of Inclusive Jet Yields in Pb plus Pb Collisions at root s(NN)=2.76 TeV with the ATLAS Detector

• Autor(a) principal: Onofre, A.
• Data de Publicação: 2013
• Outros Autores: Castro, Nuno Filipe Silva Fernandes, ATLAS Collaboration
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/1822/32085
• topic: Ciências Naturais::Ciências Físicas; Science & Technology

Measurements of the variation of inclusive jet suppression as a function of relative azimuthal angle, , with respect to the elliptic event plane provide insight into the path-length dependence of jet quenching. ATLAS has measured the dependence of jet yields in 0:14 nb 1 of ffiffiffiffiffiffiffiffi sNN p ¼ 2:76 TeV Pb þ Pb collisions at the LHC for jet transverse momenta pT > 45 GeV in different collision centrality bins using an underlying event subtraction procedure that accounts for elliptic flow. The variation of the jet yield with was characterized by the parameter, vjet 2 , and the ratio of out-of-plane ( =2) to inplane ( 0) yields. Nonzero vjet 2 values were measured in all centrality bins for pT < 160 GeV. The jet yields are observed to vary by as much as 20% between in-plane and out-of-plane directions.