- Main
Nonperturbative-transverse-momentum broadening in dihadron angular correlations in sNN =200 GeV proton-nucleus collisions
- Author(s): 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;
- Canoa Roman, V;
- Cervantes, R;
- Chi, CY;
- Chiu, M;
- Choi, IJ;
- Choi, JB;
- Citron, Z;
- Connors, M;
- Cronin, N;
- Csanád, M;
- Csörgo, T;
- Danley, TW;
- Daugherity, MS;
- David, G;
- Deblasio, K;
- Dehmelt, K;
- Denisov, A;
- Deshpande, A;
- Desmond, EJ;
- Dion, A;
- Dixit, D;
- Do, JH;
- 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;
- 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;
- Grosse Perdekamp, M;
- 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;
- Ivanishchev, D
- et al.
Published Web Location
https://doi.org/10.1103/PhysRevC.99.044912Abstract
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.
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