Publication

Measurement of the differential cross-sections of inclusive, prompt and non-prompt J/psi production in proton-proton collisions at root s=7 TeV

Bibliographic Details
Summary:	The inclusive J/ψJ/ψ production cross-section and fraction of J/ψJ/ψ mesons produced in B -hadron decays are measured in proton–proton collisions at View the MathML sources=7 TeV with the ATLAS detector at the LHC, as a function of the transverse momentum and rapidity of the J/ψJ/ψ, using 2.3 pb−1 of integrated luminosity. The cross-section is measured from a minimum pTpT of 1 GeV to a maximum of 70 GeV and for rapidities within \|y\|<2.4\|y\|<2.4 giving the widest reach of any measurement of J/ψJ/ψ production to date. The differential production cross-sections of prompt and non-prompt J/ψJ/ψ are separately determined and are compared to Colour Singlet NNLO⋆NNLO⋆, Colour Evaporation Model, and FONLL predictions.
Main Authors:	Onofre, A.
Other Authors:	Castro, Nuno Filipe Silva Fernandes; ATLAS Collaboration
Subject:	Ciências Naturais::Ciências Físicas Ciências Naturais::Ciências Físicas
Year:	2011
Country:	Portugal
Document type:	article
Access type:	open access
Associated institution:	Universidade do Minho
Language:	English
Origin:	RepositóriUM - Universidade do Minho

Description
Summary:	The inclusive J/ψJ/ψ production cross-section and fraction of J/ψJ/ψ mesons produced in B -hadron decays are measured in proton–proton collisions at View the MathML sources=7 TeV with the ATLAS detector at the LHC, as a function of the transverse momentum and rapidity of the J/ψJ/ψ, using 2.3 pb−1 of integrated luminosity. The cross-section is measured from a minimum pTpT of 1 GeV to a maximum of 70 GeV and for rapidities within \|y\|<2.4\|y\|<2.4 giving the widest reach of any measurement of J/ψJ/ψ production to date. The differential production cross-sections of prompt and non-prompt J/ψJ/ψ are separately determined and are compared to Colour Singlet NNLO⋆NNLO⋆, Colour Evaporation Model, and FONLL predictions.