Transverse mass scaling of dilepton radiation off a quark-gluon plasma

Coquet M, Du X, Ollitrault J-Y, Schlichting S, Winn M (2021)
arXiv:2112.13876.

Preprint | Englisch
 
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Autor*in
Coquet, Maurice; Du, XiaojianUniBi; Ollitrault, Jean-Yves; Schlichting, SörenUniBi ; Winn, Michael
Abstract / Bemerkung
The spectrum of dileptons produced by the quark-gluon plasma in an ultrarelativistic nucleus-nucleus collision depends only, to a good approximation, on the transverse mass M_t of the dilepton. This scaling is exact as long as transverse flow is negligible, and the system is in local thermal equilibrium. We implement a state-of-the-art modelization of kinetic and chemical equilibration in the early stages of the evolution to study the modifications of the spectrum. Violations of M_t scaling resulting from these effects are evaluated as a function of the shear viscosity to entropy ratio (eta/s) that controls the equilibration time. We determine the dependence of the spectrum on system size, centrality, rapidity, and collision energy. We show that the quark-gluon plasma produces more dileptons than the Drell-Yan process up to invariant masses of order M = 4 GeV. Due to different kinematics, for a given M_t , the dependence of the dilepton yield on M is opposite for the two processes, so that experiment alone can in principle determine which process dominates.
Erscheinungsjahr
2021
Zeitschriftentitel
arXiv:2112.13876
Page URI
https://pub.uni-bielefeld.de/record/2963713

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Coquet M, Du X, Ollitrault J-Y, Schlichting S, Winn M. Transverse mass scaling of dilepton radiation off a quark-gluon plasma. arXiv:2112.13876. 2021.
Coquet, M., Du, X., Ollitrault, J. - Y., Schlichting, S., & Winn, M. (2021). Transverse mass scaling of dilepton radiation off a quark-gluon plasma. arXiv:2112.13876
Coquet, M., Du, X., Ollitrault, J. - Y., Schlichting, S., and Winn, M. (2021). Transverse mass scaling of dilepton radiation off a quark-gluon plasma. arXiv:2112.13876.
Coquet, M., et al., 2021. Transverse mass scaling of dilepton radiation off a quark-gluon plasma. arXiv:2112.13876.
M. Coquet, et al., “Transverse mass scaling of dilepton radiation off a quark-gluon plasma”, arXiv:2112.13876, 2021.
Coquet, M., Du, X., Ollitrault, J.-Y., Schlichting, S., Winn, M.: Transverse mass scaling of dilepton radiation off a quark-gluon plasma. arXiv:2112.13876. (2021).
Coquet, Maurice, Du, Xiaojian, Ollitrault, Jean-Yves, Schlichting, Sören, and Winn, Michael. “Transverse mass scaling of dilepton radiation off a quark-gluon plasma”. arXiv:2112.13876 (2021).

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