Transverse-energy distributions at midrapidity in p+p, d+Au, and Au+Au collisions at s NN =62.4 -200 GeV and implications for particle-production models

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Title:	Transverse-energy distributions at midrapidity in p+p, d+Au, and Au+Au collisions at s NN =62.4 -200 GeV and implications for particle-production models
Authors:	彭仁傑;Adler, S. S.;Aidala, C.;Ajitanand, N. N.;Aoki, K.;Aphecetche, L.;Bathe, S.;Bazilevsky, A.;Bennett, R.;Boissevain, J. G.;Borel, H.;Boyle, K.;Burward-Hoy, J. M.;Chai, J.-S.;Chand, P.;Chi, C. Y.;Chiu, M.;Cobigo, Y.;Csanád, M.;Csörgő, T.;Durum, A.;Enokizono, A.;Fields, D. E.;Franz, A.;Frawley, A. D.;Fung, S.-Y.;Gosset, J.;Haggerty, J. S.;Hasuko, K.;He, X.;Hidas, P.;Hobbs, R.;Homma, K.;Ichihara, T.;Isobe, T.;Issah, M.;Joo, K. S.;Jouan, D.;Kamihara, N.;Kazantsev, A. V.;Kelly, S.;Khanzadeev, A.;Kikuchi, J.;Kim, D. J.;Kochetkov, V.;Kozlov, A.;Kroon, P. J.;Kunde, G. J.;Kurita, K.;Kweon, M. J.;Kyle, G. S.;Lee, D. M.;Malakhov, A.;Manko, V. I.;Mao, Y.;Matathias, F.;McGaughey, P. L.;Milov, A.;Nagamiya, S.;Nagle, J. L.;Nakamura, T.;Nguyen, M.;Nyanin, A. S.;Omiwade, O. O.;Pal, D.;Papavassiliou, V.;Park, W. J.;Penev, V.;Peresedov, V.;Pisani, R. P.;Purschke, M. L.;Purwar, A. K.;Qualls, J. M.;Ravinovich, I.;Read, K. F.;Rosnet, P.;Ryu, S. S.;Saito, N.;Sanfratello, L.;Sarsour, M.;Sato, H. D.;Sawada, S.;Shea, T. K.;Singh, V.;Soldatov, A.;Sorensen, S. P.;Sourikova, I. V.;Sugitate, T.;Tanaka, Y.;Tanida, K.;Togawa, M.;Towell, R. S.;Tyurin, N.;Hecke, H. W. van;Velkovsky, M.;Volkov, M. A.;Wang, X. R.;Watanabe, Y.;Willis, N.;Yushmanov, I. E.;Zhang, C.
Contributors:	高能與強場物理研究中心
Keywords:	[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex];FOS: Physical sciences;Nuclear Experiment;Nuclear Experiment (nucl-ex)
Date:	2014-04-09
Issue Date:	2026-04-23 12:08:00 (UTC+8)
Publisher:	American Physical Society;American Physical Society (APS)
Abstract:	摘要： Measurements of the midrapidity transverse energy distribution, $d\Et/d $, are presented for $p$$+$$p$, $d$$+$Au, and Au$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV and additionally for Au$+$Au collisions at $\sqrt{s_{_{NN}}}=62.4$ and 130 GeV. The $d\Et/d $ distributions are first compared with the number of nucleon participants $N_{\rm part}$, number of binary collisions $N_{\rm coll}$, and number of constituent-quark participants $N_{qp}$ calculated from a Glauber model based on the nuclear geometry. For Au$+$Au, $\mean{d\Et/d }/N_{\rm part}$ increases with $N_{\rm part}$, while $\mean{d\Et/d }/N_{qp}$ is approximately constant for all three energies. This indicates that the two component ansatz, $dE_{T}/d \propto (1-x) N_{\rm part}/2 + x N_{\rm coll}$, which has been used to represent $E_T$ distributions, is simply a proxy for $N_{qp}$, and that the $N_{\rm coll}$ term does not represent a hard-scattering component in $E_T$ distributions. The $dE_{T}/d $ distributions of Au$+$Au and $d$$+$Au are then calculated from the measured $p$$+$$p$ $E_T$ distribution using two models that both reproduce the Au$+$Au data. However, while the number-of-constituent-quark-participant model agrees well with the $d$$+$Au data, the additive-quark model does not. 391 authors, 24 pages, 19 figures, and 15 Tables. Submitted to Phys. Rev. C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are publicly available at http://www.phenix.bnl.gov/papers.html 出版者： American Physical Society (APS) 出版日期： 2014-04-09 出處： Physical Review C, 2014-04, Vol.89 (4) 識別號： ISSN: 0556-2813 識別號： DOI: 10.48550/arxiv.1312.6676 識別號： DOI: 10.1103/physrevc.89.044905
Appears in Collections:	[Center for High Energy and High Field Physics (CHiP)] journal & Dissertation

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