1. Nonperturbative-transverse-momentum broadening in dihadron angular correlations in sNN=200GeV proton-nucleus collisions
- Author
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Aidala, C, Akiba, Y, Alfred, M, Andrieux, V, Apadula, N, Asano, H, Azmoun, B, Babintsev, V, Bandara, NS, Barish, KN, Bathe, S, Bazilevsky, A, Beaumier, M, Belmont, R, Berdnikov, A, Berdnikov, Y, Blau, DS, Boer, M, Bok, JS, Brooks, ML, Bryslawskyj, J, Bumazhnov, V, Campbell, S, Roman, V Canoa, Cervantes, R, Y., C, Chiu, M, Choi, IJ, Choi, JB, Citron, Z, Connors, M, Cronin, N, Csanád, M, Csörgő, T, Danley, TW, Daugherity, MS, David, G, DeBlasio, K, Dehmelt, K, Denisov, A, Deshpande, A, Desmond, EJ, Dion, A, Dixit, D, H., J, Drees, A, Drees, KA, Durham, JM, Durum, A, Enokizono, A, En'yo, H, Esumi, S, Fadem, B, Fan, W, Feege, N, Fields, DE, Finger, M, Fokin, SL, Frantz, JE, Franz, A, Frawley, AD, Fukuda, Y, Gal, C, Gallus, P, Garg, P, Ge, H, Giordano, F, Goto, Y, Grau, N, Greene, SV, Perdekamp, M Grosse, Gunji, T, Guragain, H, Hachiya, T, Haggerty, JS, Hahn, KI, Hamagaki, H, Hamilton, HF, Han, SY, Hanks, J, Hasegawa, S, Haseler, TOS, He, X, Hemmick, TK, Hill, JC, Hill, K, Hodges, A, Hollis, RS, Homma, K, Hong, B, Hoshino, T, Hotvedt, N, Huang, J, Huang, S, Imai, K, Inaba, M, Iordanova, A, Isenhower, D, and Ivanishchev, D
- Subjects
Nuclear and Plasma Physics ,Particle and High Energy Physics ,Physical Sciences ,hep-ex ,nucl-ex ,Nuclear and plasma physics - Abstract
The PHENIX collaboration has measured high-pT dihadron correlations in p+p, p+Al, and p+Au collisions at sNN=200 GeV. The correlations arise from inter- and intrajet correlations and thus have sensitivity to nonperturbative effects in both the initial and final states. The distributions of pout, the transverse-momentum component of the associated hadron perpendicular to the trigger hadron, are sensitive to initial- and final-state transverse momenta. These distributions are measured multidifferentially as a function of xE, the longitudinal momentum fraction of the associated hadron with respect to the trigger hadron. The near-side pout widths, sensitive to fragmentation transverse momentum, show no significant broadening between p+Au, p+Al, and p+p. The away-side nonperturbative pout widths are found to be broadened in p+Au when compared to p+p; however, there is no significant broadening in p+Al compared to p+p collisions. The data also suggest that the away-side pout broadening is a function of Ncoll, the number of binary nucleon-nucleon collisions, in the interaction. The potential implications of these results with regard to initial- and final-state transverse-momentum broadening and energy loss of partons in a nucleus, among other nuclear effects, are discussed.
- Published
- 2019