The Experts below are selected from a list of 378060 Experts worldwide ranked by ideXlab platform
R Aaij - One of the best experts on this subject based on the ideXlab platform.
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study of prompt d 0 meson Production in ppb collisions at root nn n s 5 tev
Journal of High Energy Physics, 2017Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, S Akar, J Albrecht, F Alessio, M Alexander, Alfonso A Albero, S AliAbstract:Production of prompt D0 mesons is studied in proton-lead and lead-proton collisions recorded at the LHCb detector at the LHC. The data sample corresponds to an integrated luminosity of 1.58±0.02 nb−1 recorded at a nucleon-nucleon centre-of-mass energy of sNN=5 TeV. Measurements of the differential cross-section, the forward-backward Production Ratio and the nuclear modification factor are reported using D0 candidates with transverse momenta less than 10 GeV/c and rapidities in the ranges 1.5 < y∗< 4.0 and −5.0 < y∗< −2.5 in the nucleon-nucleon centre-of-mass system.
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study of ψ 2s Production and cold nuclear matter effects in ppb collisions at snn 5 tev
Journal of High Energy Physics, 2016Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, S Akar, J Albrecht, F Alessio, Abellan C Beteta, A Affolder, M AlexanderAbstract:The Production of ψ(2S) mesons is studied in dimuon final states using proton-lead collision data collected by the LHCb detector. The data sample corresponds to an integrated luminosity of 1.6 nb−1. The nucleon-nucleon centre-of-mass energy of the proton-lead collisions is sNN−−−−√=5 TeV. The measurement is performed using ψ(2S) mesons with transverse momentum less than 14 GeV/c and rapidity y in the ranges 1.5
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study of ψ 2 s Production and cold nuclear matter effects in p pb collisions at s n n 5 sqrt s_ n n 5 tev
Journal of High Energy Physics, 2016Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, S Akar, J Albrecht, F Alessio, Abellan C Beteta, A Affolder, M AlexanderAbstract:The Production of ψ(2S) mesons is studied in dimuon final states using proton-lead (pPb) collision data collected by the LHCb detector. The data sample corresponds to an integrated luminosity of 1.6 nb−1. The nucleon-nucleon centre-of-mass energy of the pPb collisions is $$ \sqrt{s_{N\;N}}=5 $$ TeV. The measurement is performed using ψ(2S) mesons with transverse momentum less than 14 GeV/c and rapidity y in the ranges 1.5 < y < 4.0 and −5.0 < y < −2.5 in the nucleon-nucleon centre-of-mass system. The forward-backward Production Ratio and the nuclear modification factor are determined for ψ(2S) mesons. Using the Production cross-section results of ψ(2S) and J/ψ mesons from b-hadron decays, the $$ b\overline{b} $$ cross-section in pPb collisions at $$ \sqrt{s_{N\;N}}=5 $$ TeV is obtained.
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study of Production and cold nuclear matter effects in ppb collisions at 5 tev
Journal of High Energy Physics, 2014Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, A Affolder, G Alkhazov, Alvarez P CartelleAbstract:Production of mesons in proton-lead collisions at a nucleon-nucleon centre-of-mass energy = 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(-1). The 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 (1S) mesons are determined. The data are compatible with the predictions for a suppression of (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/psi mesons.
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study of υ Production and cold nuclear matter effects in ppb collisions at snn 5 tev
Journal of High Energy Physics, 2014Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, A Affolder, G Alkhazov, Alvarez P CartelleAbstract:Production of Υ mesons in proton-lead collisions at a nucleon-nucleon centreof-mass energy √ sNN = 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−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.
M Alexander - One of the best experts on this subject based on the ideXlab platform.
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study of prompt d 0 meson Production in ppb collisions at root nn n s 5 tev
Journal of High Energy Physics, 2017Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, S Akar, J Albrecht, F Alessio, M Alexander, Alfonso A Albero, S AliAbstract:Production of prompt D0 mesons is studied in proton-lead and lead-proton collisions recorded at the LHCb detector at the LHC. The data sample corresponds to an integrated luminosity of 1.58±0.02 nb−1 recorded at a nucleon-nucleon centre-of-mass energy of sNN=5 TeV. Measurements of the differential cross-section, the forward-backward Production Ratio and the nuclear modification factor are reported using D0 candidates with transverse momenta less than 10 GeV/c and rapidities in the ranges 1.5 < y∗< 4.0 and −5.0 < y∗< −2.5 in the nucleon-nucleon centre-of-mass system.
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study of ψ 2s Production and cold nuclear matter effects in ppb collisions at snn 5 tev
Journal of High Energy Physics, 2016Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, S Akar, J Albrecht, F Alessio, Abellan C Beteta, A Affolder, M AlexanderAbstract:The Production of ψ(2S) mesons is studied in dimuon final states using proton-lead collision data collected by the LHCb detector. The data sample corresponds to an integrated luminosity of 1.6 nb−1. The nucleon-nucleon centre-of-mass energy of the proton-lead collisions is sNN−−−−√=5 TeV. The measurement is performed using ψ(2S) mesons with transverse momentum less than 14 GeV/c and rapidity y in the ranges 1.5
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study of ψ 2 s Production and cold nuclear matter effects in p pb collisions at s n n 5 sqrt s_ n n 5 tev
Journal of High Energy Physics, 2016Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, S Akar, J Albrecht, F Alessio, Abellan C Beteta, A Affolder, M AlexanderAbstract:The Production of ψ(2S) mesons is studied in dimuon final states using proton-lead (pPb) collision data collected by the LHCb detector. The data sample corresponds to an integrated luminosity of 1.6 nb−1. The nucleon-nucleon centre-of-mass energy of the pPb collisions is $$ \sqrt{s_{N\;N}}=5 $$ TeV. The measurement is performed using ψ(2S) mesons with transverse momentum less than 14 GeV/c and rapidity y in the ranges 1.5 < y < 4.0 and −5.0 < y < −2.5 in the nucleon-nucleon centre-of-mass system. The forward-backward Production Ratio and the nuclear modification factor are determined for ψ(2S) mesons. Using the Production cross-section results of ψ(2S) and J/ψ mesons from b-hadron decays, the $$ b\overline{b} $$ cross-section in pPb collisions at $$ \sqrt{s_{N\;N}}=5 $$ TeV is obtained.
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study of Production and cold nuclear matter effects in ppb collisions at 5 tev
Journal of High Energy Physics, 2014Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, A Affolder, G Alkhazov, Alvarez P CartelleAbstract:Production of mesons in proton-lead collisions at a nucleon-nucleon centre-of-mass energy = 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(-1). The 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 (1S) mesons are determined. The data are compatible with the predictions for a suppression of (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/psi mesons.
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study of υ Production and cold nuclear matter effects in ppb collisions at snn 5 tev
Journal of High Energy Physics, 2014Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, A Affolder, G Alkhazov, Alvarez P CartelleAbstract:Production of Υ mesons in proton-lead collisions at a nucleon-nucleon centreof-mass energy √ sNN = 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−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.
J Albrecht - One of the best experts on this subject based on the ideXlab platform.
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study of prompt d 0 meson Production in ppb collisions at root nn n s 5 tev
Journal of High Energy Physics, 2017Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, S Akar, J Albrecht, F Alessio, M Alexander, Alfonso A Albero, S AliAbstract:Production of prompt D0 mesons is studied in proton-lead and lead-proton collisions recorded at the LHCb detector at the LHC. The data sample corresponds to an integrated luminosity of 1.58±0.02 nb−1 recorded at a nucleon-nucleon centre-of-mass energy of sNN=5 TeV. Measurements of the differential cross-section, the forward-backward Production Ratio and the nuclear modification factor are reported using D0 candidates with transverse momenta less than 10 GeV/c and rapidities in the ranges 1.5 < y∗< 4.0 and −5.0 < y∗< −2.5 in the nucleon-nucleon centre-of-mass system.
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study of ψ 2s Production and cold nuclear matter effects in ppb collisions at snn 5 tev
Journal of High Energy Physics, 2016Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, S Akar, J Albrecht, F Alessio, Abellan C Beteta, A Affolder, M AlexanderAbstract:The Production of ψ(2S) mesons is studied in dimuon final states using proton-lead collision data collected by the LHCb detector. The data sample corresponds to an integrated luminosity of 1.6 nb−1. The nucleon-nucleon centre-of-mass energy of the proton-lead collisions is sNN−−−−√=5 TeV. The measurement is performed using ψ(2S) mesons with transverse momentum less than 14 GeV/c and rapidity y in the ranges 1.5
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study of ψ 2 s Production and cold nuclear matter effects in p pb collisions at s n n 5 sqrt s_ n n 5 tev
Journal of High Energy Physics, 2016Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, S Akar, J Albrecht, F Alessio, Abellan C Beteta, A Affolder, M AlexanderAbstract:The Production of ψ(2S) mesons is studied in dimuon final states using proton-lead (pPb) collision data collected by the LHCb detector. The data sample corresponds to an integrated luminosity of 1.6 nb−1. The nucleon-nucleon centre-of-mass energy of the pPb collisions is $$ \sqrt{s_{N\;N}}=5 $$ TeV. The measurement is performed using ψ(2S) mesons with transverse momentum less than 14 GeV/c and rapidity y in the ranges 1.5 < y < 4.0 and −5.0 < y < −2.5 in the nucleon-nucleon centre-of-mass system. The forward-backward Production Ratio and the nuclear modification factor are determined for ψ(2S) mesons. Using the Production cross-section results of ψ(2S) and J/ψ mesons from b-hadron decays, the $$ b\overline{b} $$ cross-section in pPb collisions at $$ \sqrt{s_{N\;N}}=5 $$ TeV is obtained.
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study of Production and cold nuclear matter effects in ppb collisions at 5 tev
Journal of High Energy Physics, 2014Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, A Affolder, G Alkhazov, Alvarez P CartelleAbstract:Production of mesons in proton-lead collisions at a nucleon-nucleon centre-of-mass energy = 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(-1). The 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 (1S) mesons are determined. The data are compatible with the predictions for a suppression of (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/psi mesons.
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study of υ Production and cold nuclear matter effects in ppb collisions at snn 5 tev
Journal of High Energy Physics, 2014Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, A Affolder, G Alkhazov, Alvarez P CartelleAbstract:Production of Υ mesons in proton-lead collisions at a nucleon-nucleon centreof-mass energy √ sNN = 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−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.
B Adeva - One of the best experts on this subject based on the ideXlab platform.
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study of prompt d 0 meson Production in ppb collisions at root nn n s 5 tev
Journal of High Energy Physics, 2017Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, S Akar, J Albrecht, F Alessio, M Alexander, Alfonso A Albero, S AliAbstract:Production of prompt D0 mesons is studied in proton-lead and lead-proton collisions recorded at the LHCb detector at the LHC. The data sample corresponds to an integrated luminosity of 1.58±0.02 nb−1 recorded at a nucleon-nucleon centre-of-mass energy of sNN=5 TeV. Measurements of the differential cross-section, the forward-backward Production Ratio and the nuclear modification factor are reported using D0 candidates with transverse momenta less than 10 GeV/c and rapidities in the ranges 1.5 < y∗< 4.0 and −5.0 < y∗< −2.5 in the nucleon-nucleon centre-of-mass system.
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study of ψ 2s Production and cold nuclear matter effects in ppb collisions at snn 5 tev
Journal of High Energy Physics, 2016Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, S Akar, J Albrecht, F Alessio, Abellan C Beteta, A Affolder, M AlexanderAbstract:The Production of ψ(2S) mesons is studied in dimuon final states using proton-lead collision data collected by the LHCb detector. The data sample corresponds to an integrated luminosity of 1.6 nb−1. The nucleon-nucleon centre-of-mass energy of the proton-lead collisions is sNN−−−−√=5 TeV. The measurement is performed using ψ(2S) mesons with transverse momentum less than 14 GeV/c and rapidity y in the ranges 1.5
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study of ψ 2 s Production and cold nuclear matter effects in p pb collisions at s n n 5 sqrt s_ n n 5 tev
Journal of High Energy Physics, 2016Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, S Akar, J Albrecht, F Alessio, Abellan C Beteta, A Affolder, M AlexanderAbstract:The Production of ψ(2S) mesons is studied in dimuon final states using proton-lead (pPb) collision data collected by the LHCb detector. The data sample corresponds to an integrated luminosity of 1.6 nb−1. The nucleon-nucleon centre-of-mass energy of the pPb collisions is $$ \sqrt{s_{N\;N}}=5 $$ TeV. The measurement is performed using ψ(2S) mesons with transverse momentum less than 14 GeV/c and rapidity y in the ranges 1.5 < y < 4.0 and −5.0 < y < −2.5 in the nucleon-nucleon centre-of-mass system. The forward-backward Production Ratio and the nuclear modification factor are determined for ψ(2S) mesons. Using the Production cross-section results of ψ(2S) and J/ψ mesons from b-hadron decays, the $$ b\overline{b} $$ cross-section in pPb collisions at $$ \sqrt{s_{N\;N}}=5 $$ TeV is obtained.
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study of Production and cold nuclear matter effects in ppb collisions at 5 tev
Journal of High Energy Physics, 2014Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, A Affolder, G Alkhazov, Alvarez P CartelleAbstract:Production of mesons in proton-lead collisions at a nucleon-nucleon centre-of-mass energy = 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(-1). The 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 (1S) mesons are determined. The data are compatible with the predictions for a suppression of (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/psi mesons.
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study of υ Production and cold nuclear matter effects in ppb collisions at snn 5 tev
Journal of High Energy Physics, 2014Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, A Affolder, G Alkhazov, Alvarez P CartelleAbstract:Production of Υ mesons in proton-lead collisions at a nucleon-nucleon centreof-mass energy √ sNN = 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−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.
Z Ajaltouni - One of the best experts on this subject based on the ideXlab platform.
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study of prompt d 0 meson Production in ppb collisions at root nn n s 5 tev
Journal of High Energy Physics, 2017Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, S Akar, J Albrecht, F Alessio, M Alexander, Alfonso A Albero, S AliAbstract:Production of prompt D0 mesons is studied in proton-lead and lead-proton collisions recorded at the LHCb detector at the LHC. The data sample corresponds to an integrated luminosity of 1.58±0.02 nb−1 recorded at a nucleon-nucleon centre-of-mass energy of sNN=5 TeV. Measurements of the differential cross-section, the forward-backward Production Ratio and the nuclear modification factor are reported using D0 candidates with transverse momenta less than 10 GeV/c and rapidities in the ranges 1.5 < y∗< 4.0 and −5.0 < y∗< −2.5 in the nucleon-nucleon centre-of-mass system.
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study of ψ 2s Production and cold nuclear matter effects in ppb collisions at snn 5 tev
Journal of High Energy Physics, 2016Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, S Akar, J Albrecht, F Alessio, Abellan C Beteta, A Affolder, M AlexanderAbstract:The Production of ψ(2S) mesons is studied in dimuon final states using proton-lead collision data collected by the LHCb detector. The data sample corresponds to an integrated luminosity of 1.6 nb−1. The nucleon-nucleon centre-of-mass energy of the proton-lead collisions is sNN−−−−√=5 TeV. The measurement is performed using ψ(2S) mesons with transverse momentum less than 14 GeV/c and rapidity y in the ranges 1.5
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study of ψ 2 s Production and cold nuclear matter effects in p pb collisions at s n n 5 sqrt s_ n n 5 tev
Journal of High Energy Physics, 2016Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, S Akar, J Albrecht, F Alessio, Abellan C Beteta, A Affolder, M AlexanderAbstract:The Production of ψ(2S) mesons is studied in dimuon final states using proton-lead (pPb) collision data collected by the LHCb detector. The data sample corresponds to an integrated luminosity of 1.6 nb−1. The nucleon-nucleon centre-of-mass energy of the pPb collisions is $$ \sqrt{s_{N\;N}}=5 $$ TeV. The measurement is performed using ψ(2S) mesons with transverse momentum less than 14 GeV/c and rapidity y in the ranges 1.5 < y < 4.0 and −5.0 < y < −2.5 in the nucleon-nucleon centre-of-mass system. The forward-backward Production Ratio and the nuclear modification factor are determined for ψ(2S) mesons. Using the Production cross-section results of ψ(2S) and J/ψ mesons from b-hadron decays, the $$ b\overline{b} $$ cross-section in pPb collisions at $$ \sqrt{s_{N\;N}}=5 $$ TeV is obtained.
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study of Production and cold nuclear matter effects in ppb collisions at 5 tev
Journal of High Energy Physics, 2014Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, A Affolder, G Alkhazov, Alvarez P CartelleAbstract:Production of mesons in proton-lead collisions at a nucleon-nucleon centre-of-mass energy = 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(-1). The 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 (1S) mesons are determined. The data are compatible with the predictions for a suppression of (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/psi mesons.
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study of υ Production and cold nuclear matter effects in ppb collisions at snn 5 tev
Journal of High Energy Physics, 2014Co-Authors: R Aaij, B Adeva, M Adinolfi, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, A Affolder, G Alkhazov, Alvarez P CartelleAbstract:Production of Υ mesons in proton-lead collisions at a nucleon-nucleon centreof-mass energy √ sNN = 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−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.
