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Abstract
Abstract The first study of ϕ-meson production in p–Pb collisions at forward and backward rapidity, at a nucleon–nucleon centre-of-mass energy s NN = 5.02 TeV , has been performed with the ALICE apparatus at the LHC. The ϕ-mesons have been identified in the dimuon decay channel in the transverse momentum ( p T ) range 1 < p T < 7 GeV / c , both in the p-going ( 2.03 < y < 3.53 ) and the Pb-going ( − 4.46 < y < − 2.96 ) directions — where y stands for the rapidity in the nucleon–nucleon centre-of-mass — the integrated luminosity amounting to 5.01 ± 0.19 nb − 1 and 5.81 ± 0.20 nb − 1 , respectively, for the two data samples. Differential cross sections as a function of transverse momentum and rapidity are presented. The forward–backward ratio for ϕ-meson production is measured for 2.96 < | y | < 3.53 , resulting in a ratio ∼0.5 with no significant p T dependence within the uncertainties. The p T dependence of the ϕ nuclear modification factor R pPb exhibits an enhancement up to a factor 1.6 at p T = 3 – 4 GeV / c in the Pb-going direction. The p T dependence of the ϕ-meson cross section in pp collisions at s = 2.76 TeV , which is used to determine a reference for the p–Pb results, is also presented here for 1 < p T < 5 GeV / c and 2.5 < y < 4 , for a 78 ± 3 nb − 1 integrated luminosity sample.
Original language | English |
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Pages (from-to) | 203-217 |
Number of pages | 15 |
Journal | Physics Letters B |
Volume | 768 |
Early online date | 16 Feb 2017 |
DOIs | |
Publication status | Published - 10 May 2017 |
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Dive into the research topics of 'ϕ -Meson production at forward rapidity in p–Pb collisions at √sNN = 5.02 TeV and in pp collisions at √s = 2.76 TeV'. Together they form a unique fingerprint.Projects
- 2 Finished
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Nuclear Physics Equipment 2015 - ALICE Trigger Oscilloscope
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/10/15 → 31/03/16
Project: Research Councils
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Birmingham Nuclear Physics Group Consolidated Grant
Jones, P., Evans, P., Freer, M. & Wheldon, C.
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/08/14 → 30/09/18
Project: Research Councils