Cerri, A, De Santo, A, Grout, Z J, Potter, C T, Salvatore, F, Santoyo Castillo, I, Sutton, M, Vivarelli, I and others (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

Preview

PDF - Published Version Available under License Creative Commons Attribution. Download (1MB) | Preview

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:	Article
Additional Information:	Published as part of ATLAS collaboration
Keywords:	Hadron-Hadron Scattering
Schools and Departments:	School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects:	Q Science > QB Astronomy > QB0460 Astrophysics Q Science > QC Physics Q Science > QC Physics > QC0770 Nuclear and particle physics. Atomic energy. Radioactivity Q Science > QC Physics > QC0770 Nuclear and particle physics. Atomic energy. Radioactivity > QC0793 Elementary particle physics
Depositing User:	Samuel Appleton
Date Deposited:	17 Jul 2015 07:46
Last Modified:	07 Mar 2017 11:53
URI:	http://srodev.sussex.ac.uk/id/eprint/55402

View download statistics for this item

📧 Request an update