Measurement of χ c1 and χ c2 production with s√ = 7 TeV pp collisions at ATLAS

, The ATLAS collaboration (2014) Measurement of χ c1 and χ c2 production with s√ = 7 TeV pp collisions at ATLAS. Journal of High Energy Physics, 2014 (7). ISSN 1029-8479

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Abstract

The prompt and non-prompt production cross-sections for the χ c1 and χ c2 charmonium states are measured in pp collisions at s√ = 7 TeV with the ATLAS detector at the LHC using 4.5 fb−1 of integrated luminosity. The χ c states are reconstructed through the radiative decay χ c → J/ψγ (with J/ψ → μ + μ −) where photons are reconstructed from γ → e + e − conversions. The production rate of the χ c2 state relative to the χ c1 state is measured for prompt and non-prompt χ c as a function of J/ψ transverse momentum. The prompt χ c cross-sections are combined with existing measurements of prompt J/ψ production to derive the fraction of prompt J/ψ produced in feed-down from χ c decays. The fractions of χ c1 and χ c2 produced in b-hadron decays are also measured.

Item Type:
Journal Article
Journal or Publication Title:
Journal of High Energy Physics
Additional Information:
JHEP is an open-access journal funded by SCOAP3 and licensed under CC BY 4.0
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
70898
Deposited By:
Deposited On:
18 Sep 2014 09:19
Refereed?:
Yes
Published?:
Published
Last Modified:
05 Dec 2020 02:34