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

PHENIX Collaboration

doi:10.1103/PhysRevC.102.054910

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

PHENIX Collaboration

Georgia State University
University of Colorado Boulder
Joint Institute for Nuclear Research
Los Alamos National Laboratory
University of Massachusetts
University of Michigan, Ann Arbor
Stony Brook University
RIKEN
Brookhaven National Lab
The University of Tokyo
New Mexico State University
Columbia University
High Energy Accelerator Research Organization, Tsukuba
Kyoto University
Iowa State University
United States Department of Energy
Laboratoire Leprince-Ringuet
Oak Ridge National Laboratory
Institute for High Energy Physics
Brookhaven National Laboratory
Florida Institute of Technology
University of California at Riverside
University of New Mexico
Abilene Christian University
City University of New York
Petersburg Nuclear Physics InstituteGatchina
University of Münster
University of North Carolina at Greensboro
Vanderbilt University
Peter the Great St. Petersburg Polytechnic University
Yonsei University

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

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.

Original language	English
Article number	054910
Journal	Physical Review C
Volume	102
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.102.054910
State	Published - Nov 19 2020

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10.1103/PhysRevC.102.054910

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@article{2a799f0901a7432ab436e53b84e596d1,

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

abstract = "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.",

author = "\{PHENIX Collaboration\} and U. Acharya and A. Adare and S. Afanasiev and C. Aidala and Ajitanand, \{N. N.\} and Y. Akiba and R. Akimoto and H. Al-Bataineh and J. Alexander and H. Al-Ta'ani and A. Angerami and K. Aoki and N. Apadula and Y. Aramaki and H. Asano and Aschenauer, \{E. C.\} and Atomssa, \{E. T.\} and R. Averbeck and Awes, \{T. C.\} and B. Azmoun and V. Babintsev and M. Bai and G. Baksay and L. Baksay and B. Bannier and Barish, \{K. N.\} and B. Bassalleck and Basye, \{A. T.\} and S. Bathe and V. Baublis and C. Baumann and S. Baumgart and A. Bazilevsky and S. Belikov and R. Belmont and R. Bennett and A. Berdnikov and Y. Berdnikov and Bhom, \{J. H.\} and L. Bichon and Bickley, \{A. A.\} and D. Black and B. Blankenship and K. Dehmelt and A. Deshpande and A. Drees and R. Esha and Hemmick, \{T. K.\} and J. Jia and R. Lacey",

note = "Publisher Copyright: {\textcopyright} 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.",

year = "2020",

month = nov,

day = "19",

doi = "10.1103/PhysRevC.102.054910",

language = "English",

volume = "102",

journal = "Physical Review C",

issn = "2469-9985",

number = "5",

}

TY - JOUR

T1 - Measurement of jet-medium interactions via direct photon-hadron correlations in Au+Au and d+Au collisions at sNN =200 GeV

AU - PHENIX Collaboration

AU - Acharya, U.

AU - Adare, A.

AU - Afanasiev, S.

AU - Aidala, C.

AU - Ajitanand, N. N.

AU - Akiba, Y.

AU - Akimoto, R.

AU - Al-Bataineh, H.

AU - Alexander, J.

AU - Al-Ta'ani, H.

AU - Angerami, A.

AU - Aoki, K.

AU - Apadula, N.

AU - Aramaki, Y.

AU - Asano, H.

AU - Aschenauer, E. C.

AU - Atomssa, E. T.

AU - Averbeck, R.

AU - Awes, T. C.

AU - Azmoun, B.

AU - Babintsev, V.

AU - Bai, M.

AU - Baksay, G.

AU - Baksay, L.

AU - Bannier, B.

AU - Barish, K. N.

AU - Bassalleck, B.

AU - Basye, A. T.

AU - Bathe, S.

AU - Baublis, V.

AU - Baumann, C.

AU - Baumgart, S.

AU - Bazilevsky, A.

AU - Belikov, S.

AU - Belmont, R.

AU - Bennett, R.

AU - Berdnikov, A.

AU - Berdnikov, Y.

AU - Bhom, J. H.

AU - Bichon, L.

AU - Bickley, A. A.

AU - Black, D.

AU - Blankenship, B.

AU - Dehmelt, K.

AU - Deshpande, A.

AU - Drees, A.

AU - Esha, R.

AU - Hemmick, T. K.

AU - Jia, J.

AU - Lacey, R.

N1 - Publisher Copyright: © 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

PY - 2020/11/19

Y1 - 2020/11/19

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/85097148723

U2 - 10.1103/PhysRevC.102.054910

DO - 10.1103/PhysRevC.102.054910

M3 - Article

AN - SCOPUS:85097148723

SN - 2469-9985

VL - 102

JO - Physical Review C

JF - Physical Review C

IS - 5

M1 - 054910

ER -

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

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