Measurement of substructure-dependent jet suppression in Pb+Pb collisions at 5.02 TeV with the ATLAS detector

ATLAS Collaboration

doi:10.1103/PhysRevC.107.054909

Measurement of substructure-dependent jet suppression in Pb+Pb collisions at 5.02 TeV with the ATLAS detector

ATLAS Collaboration

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

34 Citations (Scopus)

Abstract

The ATLAS detector at the Large Hadron Collider has been used to measure jet substructure modification and suppression in Pb+Pb collisions at a nucleon–nucleon center-of-mass energy ^√s_NN = 5.02 TeV in comparison with proton–proton (pp) collisions at √s = 5.02 TeV. The Pb+Pb data, collected in 2018, have an integrated luminosity of 1.72 nb⁻¹, while the ppdata, collected in 2017, have an integrated luminosity of 260 pb⁻¹. Jets used in this analysis are clustered using the anti-k_t algorithm with a radius parameter R = 0.4. The jet constituents, defined by both tracking and calorimeter information, are used to determine the angular scale r_g of the first hard splitting inside the jet by reclustering them using the Cambridge–Aachen algorithm and employing the soft-drop grooming technique. The nuclear modification factor, R_AA, used to characterize jet suppression in Pb+Pb collisions, is presented differentially in r_g, jet transverse momentum, and in intervals of collision centrality. The R_AA value is observed to depend significantly on jet r_g. Jets produced with the largest measured r_g are found to be twice as suppressed as those with the smallest r_g in central Pb+Pb collisions. The R_AA values do not exhibit a strong variation with jet p_T in any of the r_g intervals. The r_g and p_T dependence of jet R_AA is qualitatively consistent with a picture of jet quenching arising from coherence and provides the most direct evidence in support of this approach.

Original language	English
Article number	e054909
Journal	Physical Review C
Volume	107
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.107.054909
Publication status	Published - May 2023

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.107.054909

Cite this

@article{678633a4be734e90888edb70b57809bd,

title = "Measurement of substructure-dependent jet suppression in Pb+Pb collisions at 5.02 TeV with the ATLAS detector",

abstract = "The ATLAS detector at the Large Hadron Collider has been used to measure jet substructure modification and suppression in Pb+Pb collisions at a nucleon–nucleon center-of-mass energy √sNN = 5.02 TeV in comparison with proton–proton (pp) collisions at √s = 5.02 TeV. The Pb+Pb data, collected in 2018, have an integrated luminosity of 1.72 nb−1, while the ppdata, collected in 2017, have an integrated luminosity of 260 pb−1. Jets used in this analysis are clustered using the anti-kt algorithm with a radius parameter R = 0.4. The jet constituents, defined by both tracking and calorimeter information, are used to determine the angular scale rg of the first hard splitting inside the jet by reclustering them using the Cambridge–Aachen algorithm and employing the soft-drop grooming technique. The nuclear modification factor, RAA, used to characterize jet suppression in Pb+Pb collisions, is presented differentially in rg, jet transverse momentum, and in intervals of collision centrality. The RAA value is observed to depend significantly on jet rg. Jets produced with the largest measured rg are found to be twice as suppressed as those with the smallest rg in central Pb+Pb collisions. The RAA values do not exhibit a strong variation with jet pT in any of the rg intervals. The rg and pT dependence of jet RAA is qualitatively consistent with a picture of jet quenching arising from coherence and provides the most direct evidence in support of this approach.",

author = "\{ATLAS Collaboration\} and Filmer, \{E. K.\} and P. Jackson and Kong, \{A. X.Y.\} and H. Potti and Ruggeri, \{T. A.\} and Ting, \{E. X.L.\} and White, \{M. J.\} and Gingrich, \{D. M.\} and Lindon, \{J. H.\} and N. Nishu and Pinfold, \{J. L.\} and O. Cakir and \{Duran Yildiz\}, H. and S. Kuday and \{Turk Cakir\}, I. and S. Sultansoy and \{Adam Bourdarios\}, C. and N. Berger and F. Costanza and M. Delmastro and \{Di Ciaccio\}, L. and C. Goy and T. Guillemin and T. Hryn{\textquoteright}ova and S. J{\'e}z{\'e}quel and I. Koletsou and J. Lev{\^e}que and Little, \{J. D.\} and \{Lorenzo Martinez\}, N. and G. Poddar and E. Rossi and \{Sanchez Pineda\}, A. and E. Sauvan and L. Selem and G. Bernardi and M. Bomben and R. Bouquet and G. Marchiori and Bhopatkar, \{V. S.\} and S. Chekanov and S. Darmora and Hopkins, \{W. H.\} and E. Kourlitis and T. LeCompte and J. Love and M. Bhamjee and Connell, \{S. H.\} and N. Govender and L. Truong and Gololo, \{M. G.D.\}",

note = "Publisher Copyright: {\textcopyright} 2023 CERN, for the ATLAS Collaboration.",

year = "2023",

month = may,

doi = "10.1103/PhysRevC.107.054909",

language = "English",

volume = "107",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "5",

}

TY - JOUR

T1 - Measurement of substructure-dependent jet suppression in Pb+Pb collisions at 5.02 TeV with the ATLAS detector

AU - ATLAS Collaboration

AU - Filmer, E. K.

AU - Jackson, P.

AU - Kong, A. X.Y.

AU - Potti, H.

AU - Ruggeri, T. A.

AU - Ting, E. X.L.

AU - White, M. J.

AU - Gingrich, D. M.

AU - Lindon, J. H.

AU - Nishu, N.

AU - Pinfold, J. L.

AU - Cakir, O.

AU - Duran Yildiz, H.

AU - Kuday, S.

AU - Turk Cakir, I.

AU - Sultansoy, S.

AU - Adam Bourdarios, C.

AU - Berger, N.

AU - Costanza, F.

AU - Delmastro, M.

AU - Di Ciaccio, L.

AU - Goy, C.

AU - Guillemin, T.

AU - Hryn’ova, T.

AU - Jézéquel, S.

AU - Koletsou, I.

AU - Levêque, J.

AU - Little, J. D.

AU - Lorenzo Martinez, N.

AU - Poddar, G.

AU - Rossi, E.

AU - Sanchez Pineda, A.

AU - Sauvan, E.

AU - Selem, L.

AU - Bernardi, G.

AU - Bomben, M.

AU - Bouquet, R.

AU - Marchiori, G.

AU - Bhopatkar, V. S.

AU - Chekanov, S.

AU - Darmora, S.

AU - Hopkins, W. H.

AU - Kourlitis, E.

AU - LeCompte, T.

AU - Love, J.

AU - Bhamjee, M.

AU - Connell, S. H.

AU - Govender, N.

AU - Truong, L.

AU - Gololo, M. G.D.

PY - 2023/5

Y1 - 2023/5

N2 - The ATLAS detector at the Large Hadron Collider has been used to measure jet substructure modification and suppression in Pb+Pb collisions at a nucleon–nucleon center-of-mass energy √sNN = 5.02 TeV in comparison with proton–proton (pp) collisions at √s = 5.02 TeV. The Pb+Pb data, collected in 2018, have an integrated luminosity of 1.72 nb−1, while the ppdata, collected in 2017, have an integrated luminosity of 260 pb−1. Jets used in this analysis are clustered using the anti-kt algorithm with a radius parameter R = 0.4. The jet constituents, defined by both tracking and calorimeter information, are used to determine the angular scale rg of the first hard splitting inside the jet by reclustering them using the Cambridge–Aachen algorithm and employing the soft-drop grooming technique. The nuclear modification factor, RAA, used to characterize jet suppression in Pb+Pb collisions, is presented differentially in rg, jet transverse momentum, and in intervals of collision centrality. The RAA value is observed to depend significantly on jet rg. Jets produced with the largest measured rg are found to be twice as suppressed as those with the smallest rg in central Pb+Pb collisions. The RAA values do not exhibit a strong variation with jet pT in any of the rg intervals. The rg and pT dependence of jet RAA is qualitatively consistent with a picture of jet quenching arising from coherence and provides the most direct evidence in support of this approach.

AB - The ATLAS detector at the Large Hadron Collider has been used to measure jet substructure modification and suppression in Pb+Pb collisions at a nucleon–nucleon center-of-mass energy √sNN = 5.02 TeV in comparison with proton–proton (pp) collisions at √s = 5.02 TeV. The Pb+Pb data, collected in 2018, have an integrated luminosity of 1.72 nb−1, while the ppdata, collected in 2017, have an integrated luminosity of 260 pb−1. Jets used in this analysis are clustered using the anti-kt algorithm with a radius parameter R = 0.4. The jet constituents, defined by both tracking and calorimeter information, are used to determine the angular scale rg of the first hard splitting inside the jet by reclustering them using the Cambridge–Aachen algorithm and employing the soft-drop grooming technique. The nuclear modification factor, RAA, used to characterize jet suppression in Pb+Pb collisions, is presented differentially in rg, jet transverse momentum, and in intervals of collision centrality. The RAA value is observed to depend significantly on jet rg. Jets produced with the largest measured rg are found to be twice as suppressed as those with the smallest rg in central Pb+Pb collisions. The RAA values do not exhibit a strong variation with jet pT in any of the rg intervals. The rg and pT dependence of jet RAA is qualitatively consistent with a picture of jet quenching arising from coherence and provides the most direct evidence in support of this approach.

UR - https://www.scopus.com/pages/publications/85166543312

U2 - 10.1103/PhysRevC.107.054909

DO - 10.1103/PhysRevC.107.054909

M3 - Article

AN - SCOPUS:85166543312

SN - 2469-9985

VL - 107

JO - Physical Review C

JF - Physical Review C

IS - 5

M1 - e054909

ER -

Measurement of substructure-dependent jet suppression in Pb+Pb collisions at 5.02 TeV with the ATLAS detector

Abstract

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