Measurement of sequential Υ suppression in Au+Au collisions at √sNN=200 GeV with the STAR experiment
We report on measurements of sequential Υ suppression in Au+Au collisions at √sNN=200 GeV with the STAR detector at the Relativistic Heavy Ion Collider (RHIC) through both the dielectron and dimuon decay channels. In the 0%-60% centrality class, the nuclear modification factors (RAA), which quantify...
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| Main Authors: | , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) Editorial |
| Language: | English |
| Published: |
14 March 2023
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| In: |
Physical review letters
Year: 2023, Volume: 130, Issue: 11, Pages: 1-8 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.130.112301 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.130.112301 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.130.112301 
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| Author Notes: | STAR Collaboration* |
MARC
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| 246 | 3 | 3 | |a Measurement of sequential Ypsilon suppression in Au + Au collisions at square root s NN = 200 GeV with the STAR experiment |
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| 520 | |a We report on measurements of sequential Υ suppression in Au+Au collisions at √sNN=200 GeV with the STAR detector at the Relativistic Heavy Ion Collider (RHIC) through both the dielectron and dimuon decay channels. In the 0%-60% centrality class, the nuclear modification factors (RAA), which quantify the level of yield suppression in heavy-ion collisions compared to p+p collisions, for Υ(1S) and Υ(2S) are 0.40±0.03(stat)±0.03(sys)±0.09(norm) and 0.26±0.08(stat)±0.02(sys)±0.06(norm), respectively, while the upper limit of the Υ(3S) RAA is 0.17 at a 95% confidence level. This provides experimental evidence that the Υ(3S) is significantly more suppressed than the Υ(1S) at RHIC. The level of suppression for Υ(1S) is comparable to that observed at the much higher collision energy at the Large Hadron Collider. These results point to the creation of a medium at RHIC whose temperature is sufficiently high to strongly suppress excited Υ states. | ||
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