Non-monotonic energy dependence of net-proton number fluctuations

Non-monotonic energy dependence of net-proton number fluctuations

Non-monotonic variation with collision energy (√sNN) of the moments of the net-baryon number distribution in heavy-ion collisions, related to the correlation length and the susceptibilities of the system, is suggested as a signature for the Quantum Chromodynamics (QCD) critical point. We report the...

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Veröffentlicht in:Physical review letters 2021-01, Vol.126 (9)
Hauptverfasser: Adam, Jaroslav, Adamczyk, L., Aparin, A., Beliwied, R., Aschenauer, E. C., Brown, D., Bryslawskyj, J., Caines, H., Chakaberia, I, Chaloupka, P., Chankova-Bunzarova, N., Chatterjee, A., Chattopadhyay, S., Cherney, M., Contin, G., Das, S., Derevschikov, A. A., Dilks, C., Dunlop, J. C., Fatemi, R., Federic, P., Flores, C. E., Gagliardi, C. A., Gibson, A., Gupta, A., Eyser, O., Hirsch, A., Hong, Y., Huang, X., Humanic, T. J., Igo, G., Jowzaee, S., Ju, X., Kagamaster, S., Kang, K., Kauder, K., Keane, D., Kisiel, A., Kochenda, L., Kraishan, A. F., Kramarik, L., Krueger, K., Kumar, L., Kwasizur, J. H., Lacey, R., Lednicky, R., Lee, J. H., Li, C., Li, X., Lin, T., Liu, Y., Ljubicic, T., Lomnitz, M., Luo, S., Ma, L., Magdy, N., Mallick, D., Margetis, S., Markert, C., Mazer, J. A., Minaev, N. G., Mioduszewski, S., Mishra, D., Mohanty, B., Mondal, M. M., Mooney, I, Morozov, D. A., Nemes, D. B., Nie, M., Nonaka, T., Oh, K., Pawlik, B., Porter, J., Pruthi, N. K., Przybycien, M., Quintero, A., Ray, R. L., Roberts, J. B., Rusnak, J., Salur, S., Schambach, J., Schweid, B. R., Seck, F., Shao, M., Sikora, R., Simko, M., Singh, J., Sorensen, P., Stewart, D. J., Stringfellow, B., Summa, B., Taranenko, A., Tarnowsky, T., Tlusty, D., Todoroki, T., Tomkiel, C. A., Tribble, R. E., Tripathy, S. K., Tu, B., Ullrich, T.
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Sprache:eng
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NUCLEAR PHYSICS AND RADIATION PHYSICS
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Zusammenfassung:Non-monotonic variation with collision energy (√sNN) of the moments of the net-baryon number distribution in heavy-ion collisions, related to the correlation length and the susceptibilities of the system, is suggested as a signature for the Quantum Chromodynamics (QCD) critical point. We report the first evidence of a nonmonotonic variation in kurtosis times variance of the net-proton number (proxy for net-baryon number) distribution as a function of √sNN with 3.1σ significance, for head-on (central) gold on-gold (Au+Au) collisions measured using the STAR detector at RHIC. Data in non-central Au+Au collisions and models of heavy-ion collisions without a critical point show a monotonic variation as a function of √sNN.
ISSN:0031-9007
1079-7114