ϕ-Meson production at forward rapidity in p–Pb collisions at √sNN = 5.02 TeV and in pp collisions at √s = 2.76 TeV
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2017
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Physics Letters, B
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The first measurement of $phi$-meson production in p-Pb collisions at a nucleon-nucleon centre-of-mass energy $sqrt{s_{rm NN}}$ = 5.02 TeV has been performed with the ALICE apparatus at the LHC. The $phi$-mesons have been identified in the dimuon decay channel in the transverse momentum ($p_{rm T}$) range $1 < p_{rm T} < 7$ 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. Differential cross sections as a function of transverse momentum and rapidity are presented. The forward-backward asymmetry for $phi$-meson production is measured for $2.96<
</td><td>y
</td><td><3.53$, resulting in a factor $sim 0.5$ with no significant $p_{rm T}$ dependence within the uncertainties. The $p_{rm T}$ dependence of the $phi$ nuclear modification factor $R_{rm pPb}$ exhibits an enhancement up to a factor 1.6 at $p_{rm T}$ = 3-4 GeV/$c$ in the Pb-going direction. The $p_{rm T}$ dependence of the $phi$-meson cross section in pp collisions at $sqrt{s}$ = 2.76 TeV, which is used to determine a reference for the p-Pb results, is also presented here for $1 < p_{rm T} < 5$ GeV/$c$ and $2.5 <y < 4$.
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Adam, J., Adamová, D., Aggarwal, M.M., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z. & Ahn, S.U. et al. 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(C):203 - 217. http://hdl.handle.net/11427/34701