Measurement of jet fragmentation in Pb plus Pb and pp collisions at root S-NN=5.02 TeV with the ATLAS detector

M. Aaboud; G. Aad; O. Abdinov; B Abeloos; DK Abhayasinghe; S.H. Abidi; Ossama Sherif Alexander Abouzeid; NL Abraham; H. Abramowicz; H. Abreu; Y. Abulaiti; B.S. Acharya; Shin-ichi Adachi; L. Adamczyk; J. Adelman; M. Adersberger; A. Adiguzel; T. Adye; A. A. Affolder; Y.  Afik; Milena Bajic; Geert-Jan Besjes; Alejandro Alonso Diaz; Jørn Dines Hansen; Jørgen Beck Hansen; Peter Henrik Hansen; Mogens Dam; Flavia de Almeida Dias; Gorm Aske Gram Krohn Galster; James William Monk; Simon Holm Stark; Fabian Alexander Jürgen Thiele; Troels Christian Petersen; Graig Wiglesworth; Stefania Xella

doi:10.1103/PhysRevC.98.024908

Measurement of jet fragmentation in Pb plus Pb and pp collisions at root S-NN=5.02 TeV with the ATLAS detector

M. Aaboud, G. Aad, O. Abdinov, B Abeloos, DK Abhayasinghe, S.H. Abidi, Ossama Sherif Alexander Abouzeid, NL Abraham, H. Abramowicz, H. Abreu, Y. Abulaiti, B.S. Acharya, Shin-ichi Adachi, L. Adamczyk, J. Adelman, M. Adersberger, A. Adiguzel, T. Adye, A. A. Affolder, Y. AfikMilena Bajic, Geert-Jan Besjes, Alejandro Alonso Diaz, Jørn Dines Hansen, Jørgen Beck Hansen, Peter Henrik Hansen, Mogens Dam, Flavia de Almeida Dias, Gorm Aske Gram Krohn Galster, James William Monk, Simon Holm Stark, Fabian Alexander Jürgen Thiele, Troels Christian Petersen, Graig Wiglesworth, Stefania Xella

Experimental Particle Physics

32 Citations (Scopus)

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Abstract

This paper presents a measurement of jet fragmentation functions in 0.49 nb-1 of Pb+Pb collisions and 25 pb-1 of pp collisions at sNN=5.02 TeV collected in 2015 with the ATLAS detector at the LHC. These measurements provide insight into the jet quenching process in the quark-gluon plasma created in the aftermath of ultrarelativistic collisions between two nuclei. The modifications to the jet fragmentation functions are quantified by dividing the measurements in Pb+Pb collisions by baseline measurements in pp collisions. This ratio is studied as a function of the transverse momentum of the jet, the jet rapidity, and the centrality of the collision. In both collision systems, the jet fragmentation functions are measured for jets with transverse momentum between 126 and 398 GeV and with an absolute value of jet rapidity less than 2.1. An enhancement of particles carrying a small fraction of the jet momentum is observed, which increases with centrality and with increasing jet transverse momentum. Yields of particles carrying a very large fraction of the jet momentum are also observed to be enhanced. Between these two enhancements of the fragmentation functions a suppression of particles carrying an intermediate fraction of the jet momentum is observed in Pb+Pb collisions. A small dependence of the modifications on jet rapidity is observed.

Original language	English
Article number	024908
Journal	Physical Review C
Volume	98
Issue number	2
Number of pages	34
ISSN	2469-9985
DOIs	https://doi.org/10.1103/PhysRevC.98.024908
Publication status	Published - 16 Aug 2018

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Aaboud, M., Aad, G., Abdinov, O., Abeloos, B., Abhayasinghe, DK., Abidi, S. H., Abouzeid, O. S. A., Abraham, NL., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. S., Adachi, S., Adamczyk, L., Adelman, J., Adersberger, M., Adiguzel, A., Adye, T., Affolder, A. A., ... Xella, S. (2018). Measurement of jet fragmentation in Pb plus Pb and pp collisions at root S-NN=5.02 TeV with the ATLAS detector. Physical Review C, 98(2), Article 024908. https://doi.org/10.1103/PhysRevC.98.024908

Aaboud, M, Aad, G, Abdinov, O, Abeloos, B, Abhayasinghe, DK, Abidi, SH, Abouzeid, OSA, Abraham, NL, Abramowicz, H, Abreu, H, Abulaiti, Y, Acharya, BS, Adachi, S, Adamczyk, L, Adelman, J, Adersberger, M, Adiguzel, A, Adye, T, Affolder, AA, Afik, Y, Bajic, M, Besjes, G-J, Alonso Diaz, A, Hansen, JD , Hansen, JB , Hansen, PH , Dam, M, de Almeida Dias, F, Galster, GAGK, Monk, JW, Stark, SH, Thiele, FAJ, Petersen, TC , Wiglesworth, G & Xella, S 2018, 'Measurement of jet fragmentation in Pb plus Pb and pp collisions at root S-NN=5.02 TeV with the ATLAS detector', Physical Review C, vol. 98, no. 2, 024908. https://doi.org/10.1103/PhysRevC.98.024908

@article{31eef7302462443c9c13a0b5fa23fbf2,

title = "Measurement of jet fragmentation in Pb plus Pb and pp collisions at root S-NN=5.02 TeV with the ATLAS detector",

abstract = "This paper presents a measurement of jet fragmentation functions in 0.49 nb-1 of Pb+Pb collisions and 25 pb-1 of pp collisions at sNN=5.02 TeV collected in 2015 with the ATLAS detector at the LHC. These measurements provide insight into the jet quenching process in the quark-gluon plasma created in the aftermath of ultrarelativistic collisions between two nuclei. The modifications to the jet fragmentation functions are quantified by dividing the measurements in Pb+Pb collisions by baseline measurements in pp collisions. This ratio is studied as a function of the transverse momentum of the jet, the jet rapidity, and the centrality of the collision. In both collision systems, the jet fragmentation functions are measured for jets with transverse momentum between 126 and 398 GeV and with an absolute value of jet rapidity less than 2.1. An enhancement of particles carrying a small fraction of the jet momentum is observed, which increases with centrality and with increasing jet transverse momentum. Yields of particles carrying a very large fraction of the jet momentum are also observed to be enhanced. Between these two enhancements of the fragmentation functions a suppression of particles carrying an intermediate fraction of the jet momentum is observed in Pb+Pb collisions. A small dependence of the modifications on jet rapidity is observed.",

author = "M. Aaboud and G. Aad and O. Abdinov and B Abeloos and DK Abhayasinghe and S.H. Abidi and Abouzeid, {Ossama Sherif Alexander} and NL Abraham and H. Abramowicz and H. Abreu and Y. Abulaiti and B.S. Acharya and Shin-ichi Adachi and L. Adamczyk and J. Adelman and M. Adersberger and A. Adiguzel and T. Adye and Affolder, {A. A.} and Y. Afik and Milena Bajic and Geert-Jan Besjes and {Alonso Diaz}, Alejandro and Hansen, {J{\o}rn Dines} and Hansen, {J{\o}rgen Beck} and Hansen, {Peter Henrik} and Mogens Dam and {de Almeida Dias}, Flavia and Galster, {Gorm Aske Gram Krohn} and Monk, {James William} and Stark, {Simon Holm} and Thiele, {Fabian Alexander J{\"u}rgen} and Petersen, {Troels Christian} and Graig Wiglesworth and Stefania Xella",

year = "2018",

month = aug,

day = "16",

doi = "10.1103/PhysRevC.98.024908",

language = "English",

volume = "98",

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T1 - Measurement of jet fragmentation in Pb plus Pb and pp collisions at root S-NN=5.02 TeV with the ATLAS detector

AU - Aaboud, M.

AU - Aad, G.

AU - Abdinov, O.

AU - Abeloos, B

AU - Abhayasinghe, DK

AU - Abidi, S.H.

AU - Abouzeid, Ossama Sherif Alexander

AU - Abraham, NL

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Acharya, B.S.

AU - Adachi, Shin-ichi

AU - Adamczyk, L.

AU - Adelman, J.

AU - Adersberger, M.

AU - Adiguzel, A.

AU - Adye, T.

AU - Affolder, A. A.

AU - Afik, Y.

AU - Bajic, Milena

AU - Besjes, Geert-Jan

AU - Alonso Diaz, Alejandro

AU - Hansen, Jørn Dines

AU - Hansen, Jørgen Beck

AU - Hansen, Peter Henrik

AU - Dam, Mogens

AU - de Almeida Dias, Flavia

AU - Galster, Gorm Aske Gram Krohn

AU - Monk, James William

AU - Stark, Simon Holm

AU - Thiele, Fabian Alexander Jürgen

AU - Petersen, Troels Christian

AU - Wiglesworth, Graig

AU - Xella, Stefania

PY - 2018/8/16

Y1 - 2018/8/16

N2 - This paper presents a measurement of jet fragmentation functions in 0.49 nb-1 of Pb+Pb collisions and 25 pb-1 of pp collisions at sNN=5.02 TeV collected in 2015 with the ATLAS detector at the LHC. These measurements provide insight into the jet quenching process in the quark-gluon plasma created in the aftermath of ultrarelativistic collisions between two nuclei. The modifications to the jet fragmentation functions are quantified by dividing the measurements in Pb+Pb collisions by baseline measurements in pp collisions. This ratio is studied as a function of the transverse momentum of the jet, the jet rapidity, and the centrality of the collision. In both collision systems, the jet fragmentation functions are measured for jets with transverse momentum between 126 and 398 GeV and with an absolute value of jet rapidity less than 2.1. An enhancement of particles carrying a small fraction of the jet momentum is observed, which increases with centrality and with increasing jet transverse momentum. Yields of particles carrying a very large fraction of the jet momentum are also observed to be enhanced. Between these two enhancements of the fragmentation functions a suppression of particles carrying an intermediate fraction of the jet momentum is observed in Pb+Pb collisions. A small dependence of the modifications on jet rapidity is observed.

AB - This paper presents a measurement of jet fragmentation functions in 0.49 nb-1 of Pb+Pb collisions and 25 pb-1 of pp collisions at sNN=5.02 TeV collected in 2015 with the ATLAS detector at the LHC. These measurements provide insight into the jet quenching process in the quark-gluon plasma created in the aftermath of ultrarelativistic collisions between two nuclei. The modifications to the jet fragmentation functions are quantified by dividing the measurements in Pb+Pb collisions by baseline measurements in pp collisions. This ratio is studied as a function of the transverse momentum of the jet, the jet rapidity, and the centrality of the collision. In both collision systems, the jet fragmentation functions are measured for jets with transverse momentum between 126 and 398 GeV and with an absolute value of jet rapidity less than 2.1. An enhancement of particles carrying a small fraction of the jet momentum is observed, which increases with centrality and with increasing jet transverse momentum. Yields of particles carrying a very large fraction of the jet momentum are also observed to be enhanced. Between these two enhancements of the fragmentation functions a suppression of particles carrying an intermediate fraction of the jet momentum is observed in Pb+Pb collisions. A small dependence of the modifications on jet rapidity is observed.

U2 - 10.1103/PhysRevC.98.024908

DO - 10.1103/PhysRevC.98.024908

M3 - Journal article

SN - 2469-9985

VL - 98

JO - Physical Review C

JF - Physical Review C

IS - 2

M1 - 024908

ER -

Measurement of jet fragmentation in Pb plus Pb and pp collisions at root S-NN=5.02 TeV with the ATLAS detector

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