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Measurement of angular and momentum distributions of charged particles within and around jets in Pb+Pb and pp collisions at √sNN=5.02 TeV with the ATLAS detector

Aad, Georges ; Abbott, Brad ; Abbott, Dale C ; Abed Abud, Adam ; Abeling, Kira ; Abhayasinghe, Deshan Kavishka ; Abidi, Syed Haider ; AbouZeid, Hass ; Abraham, Nadine L ; Abramowicz, Halina ; Bjørke, Kristian ; Bugge, Magnar Kopangen ; Cameron, David Gordon ; Catmore, James Richard ; Garonne, Vincent ; Gramstad, Eirik ; Hellesund, Simen ; Morisbak, Vanja ; Oppen, Henrik ; Ould-Saada, Farid ; Pedersen, Maiken ; Read, Alexander Lincoln ; Rye, Eli Bæverfjord ; Røhne, Ole Myren ; Sandaker, Heidi ; Vadla, Knut Oddvar Høie ; Buanes, Trygve ; Djuvsland, Julia Isabell ; Eigen, Gerald ; Fomin, Nikolai ; Lee, Graham Richard ; Lipniacka, Anna ; Martin dit Latour, Bertrand ; Mæland, Steffen ; Stugu, Bjarne ; Træet, Are Sivertsen ; Abreu, Henso ; Abulaiti, Yiming ; Acharya, Bobby S ; Achkar, Baida ; Adachi, Shunsuke ; Adam, Lennart ; Adam-Bourdarios, Claire ; Adamczyk, Leszek ; Adamek, Lukas ; Adelman, Jareed ; Adersberger, Michael ; Adigüzel, Aytül ; Adorni, Sofia ; Adye, Tim ; ATLAS, Collaboration

Physical review. C, 2019-12, Vol.100 (6) [Periódico revisado por pares]

United States: American Physical Society

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Título:
Measurement of angular and momentum distributions of charged particles within and around jets in Pb+Pb and pp collisions at √sNN=5.02 TeV with the ATLAS detector
Autor: Aad, Georges ; Abbott, Brad ; Abbott, Dale C ; Abed Abud, Adam ; Abeling, Kira ; Abhayasinghe, Deshan Kavishka ; Abidi, Syed Haider ; AbouZeid, Hass ; Abraham, Nadine L ; Abramowicz, Halina ; Bjørke, Kristian ; Bugge, Magnar Kopangen ; Cameron, David Gordon ; Catmore, James Richard ; Garonne, Vincent ; Gramstad, Eirik ; Hellesund, Simen ; Morisbak, Vanja ; Oppen, Henrik ; Ould-Saada, Farid ; Pedersen, Maiken ; Read, Alexander Lincoln ; Rye, Eli Bæverfjord ; Røhne, Ole Myren ; Sandaker, Heidi ; Vadla, Knut Oddvar Høie ; Buanes, Trygve ; Djuvsland, Julia Isabell ; Eigen, Gerald ; Fomin, Nikolai ; Lee, Graham Richard ; Lipniacka, Anna ; Martin dit Latour, Bertrand ; Mæland, Steffen ; Stugu, Bjarne ; Træet, Are Sivertsen ; Abreu, Henso ; Abulaiti, Yiming ; Acharya, Bobby S ; Achkar, Baida ; Adachi, Shunsuke ; Adam, Lennart ; Adam-Bourdarios, Claire ; Adamczyk, Leszek ; Adamek, Lukas ; Adelman, Jareed ; Adersberger, Michael ; Adigüzel, Aytül ; Adorni, Sofia ; Adye, Tim ; ATLAS, Collaboration
Assuntos: fragmentation into hadrons ; Fysik ; jets & heavy flavor physics ; Natural Sciences ; Naturvetenskap ; Physical Sciences ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ; relativistic heavy-ion collisions ; Subatomic Physics ; Subatomär fysik
É parte de: Physical review. C, 2019-12, Vol.100 (6)
Notas: NFR/255182
USDOE Office of Science (SC)
AC02-76SF00515; AC02-05CH11231; SC0007881; AC52-07NA27344
CERN-EP-2019-158; LLNL-JRNL-793460
USDOE National Nuclear Security Administration (NNSA)
Descrição: Studies of the fragmentation of jets into charged particles in heavy-ion collisions can provide information about the mechanism of jet quenching by the hot and dense QCD matter created in such collisions, the quark-gluon plasma. This paper presents a measurement of the angular distribution of charged particles around the jet axis in √sNN=5.02 TeV Pb+Pb and pp collisions, using the ATLAS detector at the LHC. The Pb+Pb and pp data sets have integrated luminosities of 0.49nb−1 and 25pb−1, respectively. The measurement is performed for jets reconstructed with the anti-kt algorithm with radius parameter R=0.4 and is extended to an angular distance of r=0.8 from the jet axis. Results are presented as a function of Pb+Pb collision centrality and distance from the jet axis for charged particles with transverse momenta in the 1- to 63-GeV range, matched to jets with transverse momenta in the 126- to 316-GeV range and an absolute value of jet rapidity of less than 1.7. Modifications to the measured distributions are quantified by taking a ratio to the measurements in pp collisions. Yields of charged particles with transverse momenta below 4 GeV are observed to be increasingly enhanced as a function of angular distance from the jet axis, reaching a maximum at r=0.6. Charged particles with transverse momenta above 4 GeV have an enhanced yield in Pb+Pb collisions in the jet core for angular distances up to r=0.05 from the jet axis, with a suppression at larger distances.
Editor: United States: American Physical Society
Idioma: Norueguês;Inglês

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Measurement of angular and momentum distributions of charged particles within and around jets in Pb+Pb and pp collisions at √sNN=5.02 TeV with the ATLAS detector

United States: American Physical Society

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