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The differential production cross section of the ϕ (1020) meson in s√ = 7 TeV pp collisions measured with the ATLAS detector

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Article number2895
<mark>Journal publication date</mark>07/2014
<mark>Journal</mark>European Physical Journal C: Particles and Fields
Issue number7
Volume74
Number of pages21
Publication StatusPublished
<mark>Original language</mark>English

Abstract

A measurement is presented of the ϕ×BR(ϕ→K+K−) production cross section at s√ = 7 TeV using pp collision data corresponding to an integrated luminosity of 383 \upmub−1, collected with the ATLAS experiment at the LHC. Selection of ϕ(1020) mesons is based on the identification of charged kaons by their energy loss in the pixel detector. The differential cross section is measured as a function of the transverse momentum, pT,ϕ, and rapidity, yϕ, of the ϕ(1020) meson in the fiducial region 500 <pT,ϕ< 1200 MeV, |yϕ|< 0.8, kaon pT,K> 230 MeV and kaon momentum pK< 800 MeV. The integrated ϕ(1020)-meson production cross section in this fiducial range is measured to be σϕ×BR(ϕ→K+K−) = 570 ± 8 (stat) ± 66 (syst) ± 20 (lumi) \upmub

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© CERN for the benefit of the ATLAS collaboration. This article is published with open access at Springerlink.com