TY - JOUR
T1 - Comparison of inclusive and photon-tagged jet suppression in 5.02 TeV Pb+Pb collisions with ATLAS
AU - The ATLAS collaboration
AU - Aad, G.
AU - Abbott, B.
AU - Abeling, K.
AU - Abicht, N. J.
AU - Abidi, S. H.
AU - Aboulhorma, A.
AU - Abramowicz, H.
AU - Abreu, H.
AU - Abulaiti, Y.
AU - Abusleme Hoffman, A. C.
AU - Acharya, B. S.
AU - Adam Bourdarios, C.
AU - Adamczyk, L.
AU - Adamek, L.
AU - Addepalli, S. V.
AU - Addison, M. J.
AU - Adelman, J.
AU - Adiguzel, A.
AU - Adye, T.
AU - Affolder, A. A.
AU - Afik, Y.
AU - Agaras, M. N.
AU - Agarwala, J.
AU - Aggarwal, A.
AU - Agheorghiesei, C.
AU - Ahmad, A.
AU - Ahmadov, F.
AU - Ahmed, W. S.
AU - Ahuja, S.
AU - Ai, X.
AU - Aielli, G.
AU - Ait Tamlihat, M.
AU - Aitbenchikh, B.
AU - Aizenberg, I.
AU - Akbiyik, M.
AU - Åkesson, T. P.A.
AU - Akimov, A. V.
AU - Akiyama, D.
AU - Akolkar, N. N.
AU - Al Khoury, K.
AU - Barak, L.
AU - Bella, G.
AU - Cohen, H.
AU - Etzion, E.
AU - Kuprash, O.
AU - Lutz, M. S.
AU - Nayak, R.
AU - Reikher, D.
AU - Soffer, A.
AU - Tamir, N. M.
N1 - Publisher Copyright:
© 2023 The Author(s)
PY - 2023/11/10
Y1 - 2023/11/10
N2 - Parton energy loss in the quark–gluon plasma (QGP) is studied with a measurement of photon-tagged jet production in 1.7 nb−1 of Pb+Pb data and 260 pb−1 of pp data, both at sNN=5.02 TeV, with the ATLAS detector. The process pp →γ+jet+X and its analogue in Pb+Pb collisions is measured in events containing an isolated photon with transverse momentum (pT) above 50 GeV and reported as a function of jet pT. This selection results in a sample of jets with a steeply falling pT distribution that are mostly initiated by the showering of quarks. The pp and Pb+Pb measurements are used to report the nuclear modification factor, RAA, and the fractional energy loss, Sloss, for photon-tagged jets. In addition, the results are compared with the analogous ones for inclusive jets, which have a significantly smaller quark-initiated fraction. The RAA and Sloss values are found to be significantly different between those for photon-tagged jets and inclusive jets, demonstrating that energy loss in the QGP is sensitive to the colour-charge of the initiating parton. The results are also compared with a variety of theoretical models of colour-charge-dependent energy loss.
AB - Parton energy loss in the quark–gluon plasma (QGP) is studied with a measurement of photon-tagged jet production in 1.7 nb−1 of Pb+Pb data and 260 pb−1 of pp data, both at sNN=5.02 TeV, with the ATLAS detector. The process pp →γ+jet+X and its analogue in Pb+Pb collisions is measured in events containing an isolated photon with transverse momentum (pT) above 50 GeV and reported as a function of jet pT. This selection results in a sample of jets with a steeply falling pT distribution that are mostly initiated by the showering of quarks. The pp and Pb+Pb measurements are used to report the nuclear modification factor, RAA, and the fractional energy loss, Sloss, for photon-tagged jets. In addition, the results are compared with the analogous ones for inclusive jets, which have a significantly smaller quark-initiated fraction. The RAA and Sloss values are found to be significantly different between those for photon-tagged jets and inclusive jets, demonstrating that energy loss in the QGP is sensitive to the colour-charge of the initiating parton. The results are also compared with a variety of theoretical models of colour-charge-dependent energy loss.
UR - http://www.scopus.com/inward/record.url?scp=85172322734&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2023.138154
DO - 10.1016/j.physletb.2023.138154
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:85172322734
SN - 0370-2693
VL - 846
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
M1 - 138154
ER -