Measurement of Υ(1S) Elliptic Flow at Forward Rapidity in Pb-Pb Collisions at √sNN=5.02 TeV
(2019) In Physical Review Letters 123(19).- Abstract
- The first measurement of the Υ(1S) elliptic flow coefficient (v2) is performed at forward rapidity (2.5<y<4) in Pb–Pb collisions at √sNN=5.02 TeV with the ALICE detector at the LHC. The results are obtained with the scalar product method and are reported as a function of transverse momentum (pT) up to 15 GeV/c in the 5%–60% centrality interval. The measured Υ(1S)v2 is consistent with 0 and with the small positive values predicted by transport models within uncertainties. The v2 coefficient in 2<pT<15 GeV/c is lower than that of inclusive J/ψ mesons in the same pT interval by 2.6 standard deviations. These results, combined with earlier suppression measurements, are in agreement with a scenario in which the Υ(1S) production... (More)
- The first measurement of the Υ(1S) elliptic flow coefficient (v2) is performed at forward rapidity (2.5<y<4) in Pb–Pb collisions at √sNN=5.02 TeV with the ALICE detector at the LHC. The results are obtained with the scalar product method and are reported as a function of transverse momentum (pT) up to 15 GeV/c in the 5%–60% centrality interval. The measured Υ(1S)v2 is consistent with 0 and with the small positive values predicted by transport models within uncertainties. The v2 coefficient in 2<pT<15 GeV/c is lower than that of inclusive J/ψ mesons in the same pT interval by 2.6 standard deviations. These results, combined with earlier suppression measurements, are in agreement with a scenario in which the Υ(1S) production in Pb–Pb collisions at LHC energies is dominated by dissociation limited to the early stage of the collision, whereas in the J/ψ case there is substantial experimental evidence of an additional regeneration component. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/872b71e7-7a7d-4f2b-a79f-cac07e46538b
- author
- author collaboration
- organization
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Atomic physics, Physics, Experimental evidence, Forward rapidity, Pb-Pb collisions, Positive value, Scalar product, Standard deviation, Transport models, Transverse momenta, Binary alloys
- in
- Physical Review Letters
- volume
- 123
- issue
- 19
- article number
- 192301
- publisher
- American Physical Society
- external identifiers
-
- scopus:85074896931
- pmid:31765217
- ISSN
- 1079-7114
- DOI
- 10.1103/PhysRevLett.123.192301
- language
- English
- LU publication?
- yes
- id
- 872b71e7-7a7d-4f2b-a79f-cac07e46538b
- date added to LUP
- 2019-11-29 13:06:32
- date last changed
- 2023-04-10 04:05:32
@article{872b71e7-7a7d-4f2b-a79f-cac07e46538b, abstract = {{The first measurement of the Υ(1S) elliptic flow coefficient (v2) is performed at forward rapidity (2.5<y<4) in Pb–Pb collisions at √sNN=5.02 TeV with the ALICE detector at the LHC. The results are obtained with the scalar product method and are reported as a function of transverse momentum (pT) up to 15 GeV/c in the 5%–60% centrality interval. The measured Υ(1S)v2 is consistent with 0 and with the small positive values predicted by transport models within uncertainties. The v2 coefficient in 2<pT<15 GeV/c is lower than that of inclusive J/ψ mesons in the same pT interval by 2.6 standard deviations. These results, combined with earlier suppression measurements, are in agreement with a scenario in which the Υ(1S) production in Pb–Pb collisions at LHC energies is dominated by dissociation limited to the early stage of the collision, whereas in the J/ψ case there is substantial experimental evidence of an additional regeneration component.}}, author = {{Acharya, S and Adolfsson, Jonatan and Christiansen, Peter and Matonoha, Oliver and Nassirpour, Adrian and Oskarsson, Anders and Richert, Tuva and Vazquez Rueda, Omar and Silvermyr, David and Stenlund, Evert and Zurlo, N}}, issn = {{1079-7114}}, keywords = {{Atomic physics; Physics; Experimental evidence; Forward rapidity; Pb-Pb collisions; Positive value; Scalar product; Standard deviation; Transport models; Transverse momenta; Binary alloys}}, language = {{eng}}, number = {{19}}, publisher = {{American Physical Society}}, series = {{Physical Review Letters}}, title = {{Measurement of Υ(1S) Elliptic Flow at Forward Rapidity in Pb-Pb Collisions at √sNN=5.02 TeV}}, url = {{http://dx.doi.org/10.1103/PhysRevLett.123.192301}}, doi = {{10.1103/PhysRevLett.123.192301}}, volume = {{123}}, year = {{2019}}, }