Nuclear modification factors of phi mesons in d plus Au, Cu plus Cu, and Au plus Au collisions at root s(NN)=200 GeV

  • Adare, A.
  • Afanasiev, S.
  • Aidala, C.
  • Ajitanand, N. N.
  • Akiba, Y.
  • ... Hong, B.
  • 외 526명
Citations

WEB OF SCIENCE

74
Citations

SCOPUS

104

초록

The PHENIX experiment at the Relativistic Heavy Ion Collider has performed systematic measurements of phi meson production in the K+K- decay channel at midrapidity in p + p, d + Au, Cu + Cu, and Au + Au collisions at root s(NN) = 200 GeV. Results are presented on the phi invariant yield and the nuclear modification factor R-AA for Au + Au and Cu + Cu, and R-dA for d + Au collisions, studied as a function of transverse momentum (1 < p(T) < 7 GeV/c) and centrality. In central and midcentral Au + Au collisions, the R-AA of phi exhibits a suppression relative to expectations from binary scaled p + p results. The amount of suppression is smaller than that of the pi(0) and the. in the intermediate p(T) range (2-5 GeV/c), whereas, at higher p(T), the phi, pi(0), and. show similar suppression. The baryon (proton and antiproton) excess observed in central Au + Au collisions at intermediate p(T) is not observed for the phi meson despite the similar masses of the proton and the phi. This suggests that the excess is linked to the number of valence quarks in the hadron rather than its mass. The difference gradually disappears with decreasing centrality, and, for peripheral collisions, the R-AA values for both particle species are consistent with binary scaling. Cu + Cu collisions show the same yield and suppression as Au + Au collisions for the same number of N-part. The R-dA of phi shows no evidence for cold nuclear effects within uncertainties.

키워드

LARGE TRANSVERSE-MOMENTUMD+AU COLLISIONSHADRONSENERGYSTATISTICSDEPENDENCEP+P
제목
Nuclear modification factors of phi mesons in d plus Au, Cu plus Cu, and Au plus Au collisions at root s(NN)=200 GeV
저자
Adare, A.Afanasiev, S.Aidala, C.Ajitanand, N. N.Akiba, Y.Al-Bataineh, H.Alexander, J.Al-Jamel, A.Angerami, A.Aoki, K.Apadula, N.Aphecetche, L.Aramaki, Y.Armendariz, R.Aronson, S. H.Asai, J.Atomssa, E. T.Averbeck, R.Awes, T. C.Azmoun, B.Babintsev, V.Bai, M.Baksay, G.Baksay, L.Baldisseri, A.Barish, K. N.Barnes, P. D.Bassalleck, B.Basye, A. T.Bathe, S.Batsouli, S.Baublis, V.Bauer, F.Baumann, C.Bazilevsky, A.Belikov, S.Belmont, R.Bennett, R.Berdnikov, A.Berdnikov, Y.Bhom, J. H.Bickley, A. A.Bjorndal, M. T.Blau, D. S.Boissevain, J. G.Bok, J. S.Borel, H.Borggren, N.Boyle, K.Brooks, M. L.Brown, D. S.Bucher, D.Buesching, H.Bumazhnov, V.Bunce, G.Burward-Hoy, J. M.Butsyk, S.Campbell, S.Caringi, A.Chai, J. -S.Chang, B. S.Charvet, J. L.Chen, C. H.Chernichenko, S.Chiba, J.Chi, C. Y.Chiu, M.Choi, I. J.Choi, J. B.Choudhury, R. K.Christiansen, P.Chujo, T.Chung, P.Churyn, A.Chvala, O.Cianciolo, V.Citron, Z.Cleven, C. R.Cobigo, Y.Cole, B. A.Comets, M. P.del Valle, Z. 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DOI
10.1103/PhysRevC.83.024909
발행일
2011-02-18
유형
Article
저널명
Physical Review C - Nuclear Physics
83
2