ϒ production and nuclear modification at forward rapidity in Pb–Pb collisions at sNN=5.02TeV

S Acharya; Jonatan Adolfsson; Sumit Basu; Peter Christiansen; Oliver Matonoha; Adrian Nassirpour; Alice Ohlson; Anders Oskarsson; Tuva Richert; Omar Vazquez Rueda; David Silvermyr; N Zurlo; ALICE Collaboration

doi:10.1016/j.physletb.2021.136579

ϒ production and nuclear modification at forward rapidity in Pb–Pb collisions at sNN=5.02TeV

S Acharya, Jonatan Adolfsson, Sumit Basu, Peter Christiansen, Oliver Matonoha, Adrian Nassirpour, Alice Ohlson, Anders Oskarsson, Tuva Richert, Omar Vazquez Rueda, David Silvermyr, N Zurlo, ALICE Collaboration

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Abstract

The production of ϒ mesons in Pb–Pb collisions at a centre-of-mass energy per nucleon pair sNN=5.02 TeV is measured with the muon spectrometer of the ALICE detector at the LHC. The yields as well as the nuclear modification factors are determined in the forward rapidity region 2.5<y<4.0, as a function of rapidity, transverse momentum and collision centrality. The results show that the production of the ϒ(1S) meson is suppressed by a factor of about three with respect to the production in proton–proton collisions. For the first time, a significant signal for the ϒ(2S) meson is observed at forward rapidity, indicating a suppression stronger by about a factor 2–3 with respect to the ground state. The measurements are compared with transport, hydrodynamic, comover and statistical hadronisation model calculations. © 2021 European Organization for Nuclear Research, ALICE

Original language	English
Article number	136579
Journal	Physics Letters B
Volume	822
DOIs	https://doi.org/10.1016/j.physletb.2021.136579
Publication status	Published - 2021 Nov 10

Subject classification (UKÄ)

Subatomic Physics

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Acharya, S., Adolfsson, J., Basu, S., Christiansen, P., Matonoha, O., Nassirpour, A., Ohlson, A., Oskarsson, A., Richert, T., Vazquez Rueda, O., Silvermyr, D., Zurlo, N., & ALICE Collaboration (2021). ϒ production and nuclear modification at forward rapidity in Pb–Pb collisions at sNN=5.02TeV. Physics Letters B, 822, Article 136579. https://doi.org/10.1016/j.physletb.2021.136579

@article{eb0393b9540240caad6ce24727c4787c,

title = "ϒ production and nuclear modification at forward rapidity in Pb–Pb collisions at sNN=5.02TeV",

abstract = "The production of ϒ mesons in Pb–Pb collisions at a centre-of-mass energy per nucleon pair sNN=5.02 TeV is measured with the muon spectrometer of the ALICE detector at the LHC. The yields as well as the nuclear modification factors are determined in the forward rapidity region 2.5<y<4.0, as a function of rapidity, transverse momentum and collision centrality. The results show that the production of the ϒ(1S) meson is suppressed by a factor of about three with respect to the production in proton–proton collisions. For the first time, a significant signal for the ϒ(2S) meson is observed at forward rapidity, indicating a suppression stronger by about a factor 2–3 with respect to the ground state. The measurements are compared with transport, hydrodynamic, comover and statistical hadronisation model calculations. {\textcopyright} 2021 European Organization for Nuclear Research, ALICE",

author = "S Acharya and Jonatan Adolfsson and Sumit Basu and Peter Christiansen and Oliver Matonoha and Adrian Nassirpour and Alice Ohlson and Anders Oskarsson and Tuva Richert and {Vazquez Rueda}, Omar and David Silvermyr and N Zurlo and {ALICE Collaboration}",

year = "2021",

month = nov,

day = "10",

doi = "10.1016/j.physletb.2021.136579",

language = "English",

volume = "822",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

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TY - JOUR

T1 - ϒ production and nuclear modification at forward rapidity in Pb–Pb collisions at sNN=5.02TeV

AU - Acharya, S

AU - Adolfsson, Jonatan

AU - Basu, Sumit

AU - Christiansen, Peter

AU - Matonoha, Oliver

AU - Nassirpour, Adrian

AU - Ohlson, Alice

AU - Oskarsson, Anders

AU - Richert, Tuva

AU - Vazquez Rueda, Omar

AU - Silvermyr, David

AU - Zurlo, N

AU - ALICE Collaboration

PY - 2021/11/10

Y1 - 2021/11/10

N2 - The production of ϒ mesons in Pb–Pb collisions at a centre-of-mass energy per nucleon pair sNN=5.02 TeV is measured with the muon spectrometer of the ALICE detector at the LHC. The yields as well as the nuclear modification factors are determined in the forward rapidity region 2.5<y<4.0, as a function of rapidity, transverse momentum and collision centrality. The results show that the production of the ϒ(1S) meson is suppressed by a factor of about three with respect to the production in proton–proton collisions. For the first time, a significant signal for the ϒ(2S) meson is observed at forward rapidity, indicating a suppression stronger by about a factor 2–3 with respect to the ground state. The measurements are compared with transport, hydrodynamic, comover and statistical hadronisation model calculations. © 2021 European Organization for Nuclear Research, ALICE

AB - The production of ϒ mesons in Pb–Pb collisions at a centre-of-mass energy per nucleon pair sNN=5.02 TeV is measured with the muon spectrometer of the ALICE detector at the LHC. The yields as well as the nuclear modification factors are determined in the forward rapidity region 2.5<y<4.0, as a function of rapidity, transverse momentum and collision centrality. The results show that the production of the ϒ(1S) meson is suppressed by a factor of about three with respect to the production in proton–proton collisions. For the first time, a significant signal for the ϒ(2S) meson is observed at forward rapidity, indicating a suppression stronger by about a factor 2–3 with respect to the ground state. The measurements are compared with transport, hydrodynamic, comover and statistical hadronisation model calculations. © 2021 European Organization for Nuclear Research, ALICE

U2 - 10.1016/j.physletb.2021.136579

DO - 10.1016/j.physletb.2021.136579

M3 - Article

SN - 0370-2693

VL - 822

JO - Physics Letters B

JF - Physics Letters B

M1 - 136579

ER -

ϒ production and nuclear modification at forward rapidity in Pb–Pb collisions at sNN=5.02TeV

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