Beam energy dependence of (anti-)deuteron production in Au + Au collisions at the BNL Relativistic Heavy Ion Collider
We report the energy dependence of mid-rapidity (anti-)deuteron production in Au+Au collisions at root s(NN) = 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200 GeV, measured by the STAR experiment at the BNL Relativistic Heavy Ion Collider. The yield of deuterons is found to be well described by the the...
Saved in:
| Main Authors: | , , |
|---|---|
| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
21 June 2019
|
| In: |
Physical review
Year: 2019, Volume: 99, Issue: 6, Pages: 1-12 |
| ISSN: | 2469-9993 |
| DOI: | 10.1103/PhysRevC.99.064905 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1103/PhysRevC.99.064905 Verlag, Volltext: https://journals.aps.org/prc/abstract/10.1103/PhysRevC.99.064905 
|
| Author Notes: | J. Adam, I.M. Deppner, N. Herrmann [und 345 weitere] (STAR Collaboration) |
| Summary: | We report the energy dependence of mid-rapidity (anti-)deuteron production in Au+Au collisions at root s(NN) = 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200 GeV, measured by the STAR experiment at the BNL Relativistic Heavy Ion Collider. The yield of deuterons is found to be well described by the thermal model. The collision energy, centrality, and transverse momentum dependence of the coalescence parameter B-2 are discussed. We find that the values of B-2 for antideuterons are systematically lower than those for deuterons, indicating that the correlation volume of antibaryons is larger than that of baryons at root s(NN) from 19.6 to 39 GeV. In addition, values of B-2 are found to vary with collision energy and show a broad minimum around root s(NN) = 20-40 GeV, which might imply a change of the equation of state of the medium in these collisions. |
|---|---|
| Item Description: | Gesehen am 26.11.2019 |
| Physical Description: | Online Resource |
| ISSN: | 2469-9993 |
| DOI: | 10.1103/PhysRevC.99.064905 |