ϕ-Meson production at forward rapidity in p–Pb collisions at √sNN = 5.02 TeV and in pp collisions at √s = 2.76 TeV
ALICE Collaboration. (2017). ϕ-Meson production at forward rapidity in p–Pb collisions at √sNN = 5.02 TeV and in pp collisions at √s = 2.76 TeV. Physics Letters B, 768, 203-217. https://doi.org/10.1016/j.physletb.2017.01.074
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Physics Letters BAuthors
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2017Copyright
© 2017 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license. Funded by SCOAP3.
The first study of φ-meson production in p–Pb collisions at forward and backward rapidity, at a nucleon–
nucleon centre-of-mass energy √sNN = 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 (pT)
range 1 < pT < 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 pT dependence within the uncertainties. The pT dependence of the φ nuclear
modification factor RpPb exhibits an enhancement up to a factor 1.6 at pT = 3–4 GeV/c in the Pb-going
direction. The pT 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 < pT < 5 GeV/c and
2.5 < y < 4, for a 78 ± 3 nb−1 integrated luminosity sample.
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Except where otherwise noted, this item's license is described as © 2017 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license. Funded by SCOAP3.
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