1. Production of π0 and η mesons in Cu+Au collisions at sNN=200GeV
- Author
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Aidala, C, Ajitanand, NN, Akiba, Y, Akimoto, R, Alexander, J, Alfred, M, Aoki, K, Apadula, N, Asano, H, Atomssa, ET, Awes, TC, Azmoun, B, Babintsev, V, Bagoly, A, Bai, M, Bai, X, Bannier, B, Barish, KN, Bathe, S, Baublis, V, Baumann, C, Baumgart, S, Bazilevsky, A, Beaumier, M, Belmont, R, Berdnikov, A, Berdnikov, Y, Black, D, Blau, DS, Boer, M, Bok, JS, Boyle, K, Brooks, ML, Bryslawskyj, J, Buesching, H, Bumazhnov, V, Butsyk, S, Campbell, S, Canoa Roman, V, Chen, CH, Chi, CY, Chiu, M, Choi, IJ, Choi, JB, Choi, S, Christiansen, P, Chujo, T, Cianciolo, V, Cole, BA, Connors, M, Cronin, N, Crossette, N, Csanád, M, Csörgo, T, Danley, TW, Datta, A, Daugherity, MS, David, G, Deblasio, K, Dehmelt, K, Denisov, A, Deshpande, A, Desmond, EJ, Ding, L, Do, JH, D'Orazio, L, Drapier, O, Drees, A, Drees, KA, Durham, JM, Durum, A, Engelmore, T, Enokizono, A, Esumi, S, Eyser, KO, Fadem, B, Fan, W, Feege, N, Fields, DE, Finger, M, Fleuret, F, Fokin, SL, Frantz, JE, Franz, A, Frawley, AD, Fukao, Y, Fusayasu, T, Gainey, K, Gal, C, Gallus, P, Garg, P, Garishvili, A, Garishvili, I, Ge, H, Giordano, F, Glenn, A, Gong, X, Gonin, M, and Goto, Y
- Subjects
Particle and Plasma Physics ,hep-ex ,Nuclear Theory ,Molecular ,High Energy Physics::Experiment ,Nuclear ,Nuclear Experiment ,Atomic ,Nuclear & Particles Physics - Abstract
Production of π0 and η mesons has been measured at midrapidity in Cu+Au collisions at sNN=200GeV. Measurements were performed in π0(η)→γγ decay channel in the 1(2)-20GeV/c transverse momentum range. A strong suppression is observed for π0 and η meson production at high transverse momentum in central Cu+Au collisions relative to the p+p results scaled by the number of nucleon-nucleon collisions. In central collisions the suppression is similar to Au+Au with comparable nuclear overlap. The η/π0 ratio measured as a function of transverse momentum is consistent with mT-scaling parametrization down to pT=2GeV/c, its asymptotic value is constant and consistent with Au+Au and p+p and does not show any significant dependence on collision centrality. Similar results were obtained in hadron-hadron, hadron-nucleus, and nucleus-nucleus collisions as well as in e+e- collisions in a range of collision energies sNN=3-1800 GeV. This suggests that the quark-gluon-plasma medium produced in Cu+Cu collisions either does not affect the jet fragmentation into light mesons or it affects the π0 and η the same way.
- Published
- 2018