Physical Review Letters
We report the first measurement of charmed-hadron (D0) production via the hadronic decay channel (D0→K−+π+) in Au+Au collisions at √sNN=200 GeV with the STAR experiment. The charm production cross section per nucleon-nucleon collision at midrapidity scales with the number of binary collisions, Nbin, from p+p to central Au+Au collisions. The D0 meson yields in central Au+Au collisions are strongly suppressed compared to those in p+p scaled by Nbin, for transverse momenta pT > 3 GeV/c, demonstrating significant energy loss of charm quarks in the hot and dense medium. An enhancement at intermediate pT is also observed. Model calculations including strong charm-medium interactions and coalescence hadronization describe our measurements.
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Original Publication Citation
Adamczyk, L., Adkins, J. K., Agakishiev, G., Aggarwal, M.M., Ahammed, Z., Alekseev, I., Alford, J., Anson, C.D., Aparin, A., Arkhipkin, D., Aschenauer, E. C., Averichev, G. S., Banerjee, A., Beavis, D. S., Bellwied, R., Bhasin, A., Bhati, A. K., Bhattarai, P., Bichsel, H. . . . Zyzak, M. (2014) Observation of D⁰ meson nuclear modifications in Au + Au collisions at √SNN = 200 GeV. Physical Review Letters, 113(14), 1-7, Article 142301. https://doi.org/10.1103/PhysRevLett.113.142301
Adamczyk, L.; Adkins, J. K.; Agakishiev, G.; Aggarwal, M. M.; Ahammed, Z.; Alekseev, I.; Alford, J.; Anson, C. D.; Aparin, A.; Arkhipkin, D.; Aschenauer, E. C.; Averichev, G. S.; Banerjee, A.; Beavis, D. R.; Bellwied, R.; Bhasin, A.; Bhati, A. K.; Bhattarai, P.; Bichsel, H.; Zyzak, M.; Et al.; and STAR Collaboration, "Observation of D⁰ Meson Nuclear Modifications in Au + Au Collisions at √SNN = 200 GeV" (2014). Physics Faculty Publications. 797.