Journal article
Measurement of nuclear modification factors of ϒ(1S), ϒ(2S), and ϒ(3S) mesons in PbPb collisions at √sNN = 5.02 TeV
Physics letters. B Nuclear, elementary particle and high-energy physics, Vol.790, pp.270-293
03/10/2019
DOI: 10.1016/j.physletb.2019.01.006
Abstract
The cross sections for ϒ(1S), ϒ(2S), and ϒ(3S) production in lead–lead (PbPb) and proton–proton (pp)
collisions at √sNN = 5.02 TeV have been measured using the CMS detector at the LHC. The nuclear
modification factors, RAA, derived from the PbPb-to-pp ratio of yields for each state, are studied as
functions of meson rapidity and transverse momentum, as well as PbPb collision centrality. The yields of
all three states are found to be significantly suppressed, and compatible with a sequential ordering of the
suppression, RAA(ϒ(1S)) > RAA(ϒ(2S)) > RAA(ϒ(3S)). The suppression of ϒ(1S) is larger than that seen
at √sNN = 2.76 TeV, although the two are compatible within uncertainties. The upper limit on the RAA of
ϒ(3S) integrated over pT, rapidity and centrality is 0.096 at 95% confidence level, which is the strongest
suppression observed for a quarkonium state in heavy ion collisions to date
Details
- Title: Subtitle
- Measurement of nuclear modification factors of ϒ(1S), ϒ(2S), and ϒ(3S) mesons in PbPb collisions at √sNN = 5.02 TeV
- Creators
- CMS Collaboration (Institution)B. Bilki - University of IowaW Clarida - University of IowaKamuran Dilsiz - University of Iowa, Physics and AstronomyS. Durgut - University of IowaR. P. Gandrajula - University of IowaM. Haytmyradov - University of IowaV Khristenko - University of IowaJ-P Merlo - University of IowaH Mermerkaya - University of IowaAlexi Mestvirishvili - University of Iowa, Physics and AstronomyA. Moeller - University of IowaJane M Nachtman - University of Iowa, Physics and AstronomyHasan Ogul - University of Iowa, Physics and AstronomyYasar Onel - University of Iowa, Physics and AstronomyF. Ozok - University of IowaAldo Penzo - University of Iowa, Physics and AstronomyC. Snyder - University of IowaE. Tiras - University of IowaKai Yi - University of Iowa, Physics and AstronomyJames W Wetzel - University of Iowa, Physics and Astronomy
- Resource Type
- Journal article
- Publication Details
- Physics letters. B Nuclear, elementary particle and high-energy physics, Vol.790, pp.270-293
- DOI
- 10.1016/j.physletb.2019.01.006
- ISSN
- 0370-2693
- eISSN
- 1873-2445
- Publisher
- Elsevier
- Grant note
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- Language
- English
- Date published
- 03/10/2019
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984439158902771
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