- 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
© 2019 authors. Published by the American Physical Society. Funded by SCOAP 3 . 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.