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Measurement of jet-medium interactions via direct photon-hadron correlations in Au+Au and d+Au collisions at sNN =200 GeV

Publication ,  Journal Article
Acharya, U; Adare, A; Afanasiev, S; Aidala, C; Ajitanand, NN; Akiba, Y; Akimoto, R; Al-Bataineh, H; Alexander, J; Al-Ta'ani, H; Angerami, A ...
Published in: Physical Review C
November 19, 2020

We present direct photon-hadron correlations in 200 GeV/A Au+Au, d+Au, and p+p collisions, for direct photon pT from 5-12 GeV/c, collected by the PHENIX Collaboration in the years from 2006 to 2011. We observe no significant modification of jet fragmentation in d+Au collisions, indicating that cold nuclear matter effects are small or absent. Hadrons carrying a large fraction of the quark's momentum are suppressed in Au+Au compared to p+p and d+Au. As the momentum fraction decreases, the yield of hadrons in Au+Au increases to an excess over the yield in p+p collisions. The excess is at large angles and at low hadron pT and is most pronounced for hadrons associated with lower momentum direct photons. Comparison to theoretical calculations suggests that the hadron excess arises from medium response to energy deposited by jets.

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Published In

Physical Review C

DOI

EISSN

2469-9993

ISSN

2469-9985

Publication Date

November 19, 2020

Volume

102

Issue

5

Related Subject Headings

  • 5106 Nuclear and plasma physics
 

Citation

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Acharya, U., Adare, A., Afanasiev, S., Aidala, C., Ajitanand, N. N., Akiba, Y., … Drapier, O. (2020). Measurement of jet-medium interactions via direct photon-hadron correlations in Au+Au and d+Au collisions at sNN =200 GeV. Physical Review C, 102(5). https://doi.org/10.1103/PhysRevC.102.054910
Acharya, U., A. Adare, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, R. Akimoto, et al. “Measurement of jet-medium interactions via direct photon-hadron correlations in Au+Au and d+Au collisions at sNN =200 GeV.” Physical Review C 102, no. 5 (November 19, 2020). https://doi.org/10.1103/PhysRevC.102.054910.
Acharya U, Adare A, Afanasiev S, Aidala C, Ajitanand NN, Akiba Y, et al. Measurement of jet-medium interactions via direct photon-hadron correlations in Au+Au and d+Au collisions at sNN =200 GeV. Physical Review C. 2020 Nov 19;102(5).
Acharya, U., et al. “Measurement of jet-medium interactions via direct photon-hadron correlations in Au+Au and d+Au collisions at sNN =200 GeV.” Physical Review C, vol. 102, no. 5, Nov. 2020. Scopus, doi:10.1103/PhysRevC.102.054910.
Acharya U, Adare A, Afanasiev S, Aidala C, Ajitanand NN, Akiba Y, Akimoto R, Al-Bataineh H, Alexander J, Al-Ta’ani H, Angerami A, Aoki K, Apadula N, Aramaki Y, Asano H, Aschenauer EC, Atomssa ET, Averbeck R, Awes TC, Azmoun B, Babintsev V, Bai M, Baksay G, Baksay L, Bannier B, Barish KN, Bassalleck B, Basye AT, Bathe S, Baublis V, Baumann C, Baumgart S, Bazilevsky A, Belikov S, Belmont R, Bennett R, Berdnikov A, Berdnikov Y, Bhom JH, Bichon L, Bickley AA, Black D, Blankenship B, Blau DS, Bok JS, Borisov V, Boyle K, Brooks ML, Bryslawskyj J, Buesching H, Bumazhnov V, Bunce G, Butsyk S, Camacho CM, Campbell S, Canoa Roman V, Caringi A, Castera P, Chen CH, Chi CY, Chiu M, Choi IJ, Choi JB, Choi S, Choudhury RK, Christiansen P, Chujo T, Chung P, Chvala O, Cianciolo V, Citron Z, Cole BA, Conesa Del Valle Z, Connors M, Constantin P, Cronin N, Crossette N, Csanád M, Csörgo T, Dahms T, Dairaku S, Danchev I, Das K, Datta A, Daugherity MS, David G, Dayananda MK, Deblasio K, Dehmelt K, Denisov A, Deshpande A, Desmond EJ, Dharmawardane KV, Dietzsch O, Ding L, Dion A, Do JH, Donadelli M, D’Orazio L, Drapier O. Measurement of jet-medium interactions via direct photon-hadron correlations in Au+Au and d+Au collisions at sNN =200 GeV. Physical Review C. 2020 Nov 19;102(5).

Published In

Physical Review C

DOI

EISSN

2469-9993

ISSN

2469-9985

Publication Date

November 19, 2020

Volume

102

Issue

5

Related Subject Headings

  • 5106 Nuclear and plasma physics