Study of ϒ Production and Cold Nuclear Matter Effects in pPb Collisions at √s[subscript NN] = 5 TeV
Production of Υ mesons in proton-lead collisions at a nucleon-nucleon centre-of-mass energy √s[subscript NN] = 5 TeV is studied with the LHCb detector. The analysis is based on a data sample corresponding to an integrated luminosity of 1.6 nb[superscript −1]. The Υ mesons of transverse momenta up to...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Springer-Verlag
2014
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| Online Access: | http://hdl.handle.net/1721.1/91172 https://orcid.org/0000-0001-8285-3346 https://orcid.org/0000-0002-4670-1334 https://orcid.org/0000-0001-5534-1732 |
| Summary: | Production of Υ mesons in proton-lead collisions at a nucleon-nucleon centre-of-mass energy √s[subscript NN] = 5 TeV is studied with the LHCb detector. The analysis is based on a data sample corresponding to an integrated luminosity of 1.6 nb[superscript −1]. The Υ mesons of transverse momenta up to 15 GeV/c are reconstructed in the dimuon decay mode. The rapidity coverage in the centre-of-mass system is 1.5 < y < 4.0 (forward region) and −5.0 < y < −2.5 (backward region). The forward-backward production ratio and the nuclear modification factor for Υ (1S) mesons are determined. The data are compatible with the predictions for a suppression of Υ (1S) production with respect to proton-proton collisions in the forward region, and an enhancement in the backward region. The suppression is found to be smaller than in the case of prompt J/ψ mesons. |
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