Measurement of azimuthal anisotropy of muons from charm and bottom hadrons in Pb+Pb collisions at √sNN=5.02 TeV TeV with the ATLAS detector

Azimuthal anisotropies of muons from charm and bottom hadron decays are measured in Pb+Pb collisions at √sNN=5.02TeV. The data were collected with the ATLAS detector at the Large Hadron Collider in 2015 and 2018 with integrated luminosities of 0.5nb−1 and 1.4nb−1, respectively. The kinematic selecti...

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Veröffentlicht in:Physics letters. B 2020
Hauptverfasser: 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, 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, Affolder, Anthony Allen, ATLAS, Collaboration
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container_title Physics letters. B
container_volume
creator 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
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
Affolder, Anthony Allen
ATLAS, Collaboration
description Azimuthal anisotropies of muons from charm and bottom hadron decays are measured in Pb+Pb collisions at √sNN=5.02TeV. The data were collected with the ATLAS detector at the Large Hadron Collider in 2015 and 2018 with integrated luminosities of 0.5nb−1 and 1.4nb−1, respectively. The kinematic selection for heavy-flavor muons requires transverse momentum 4 < pT < 30GeV and pseudorapidity |η| < 2.0. The dominant sources of muons in this pT range are semi-leptonic decays of charm and bottom hadrons. These heavy-flavor muons are separated from light-hadron decay muons and punch-through hadrons using the momentum imbalance between the measurements in the tracking detector and in the muon spectrometers. Azimuthal anisotropies, quantified by flow coefficients, are measured via the event-plane method for inclusive heavy-flavor muons as a function of the muon pTand in intervals of Pb+Pb collision centrality. Heavy-flavor muons are separated into contributions from charm and bottom hadron decays using the muon transverse impact parameter with respect to the event primary vertex. Non-zero elliptic (v2) and triangular (v3) flow coefficients are extracted for charm and bottom muons, with the charm muon coefficients larger than those for bottom muons for all Pb+Pb collision centralities. The results indicate substantial modification to the charm and bottom quark angular distributions through interactions in the quark-gluon plasma produced in these Pb+Pb collisions, with smaller modifications for the bottom quarks as expected theoretically due to their larger mass.
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Heavy-flavor muons are separated into contributions from charm and bottom hadron decays using the muon transverse impact parameter with respect to the event primary vertex. Non-zero elliptic (v2) and triangular (v3) flow coefficients are extracted for charm and bottom muons, with the charm muon coefficients larger than those for bottom muons for all Pb+Pb collision centralities. The results indicate substantial modification to the charm and bottom quark angular distributions through interactions in the quark-gluon plasma produced in these Pb+Pb collisions, with smaller modifications for the bottom quarks as expected theoretically due to their larger mass.</description><issn>0370-2693</issn><issn>1873-2445</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>3HK</sourceid><recordid>eNqFisFKw0AURQdRMGq_oW8vKZNMp00XLoooXdRSaOg2TJIJM5KZJzMviH6BG3_Az_NLbMS9i8uBc-4ZS7JiKdJ8PpfnLOFiydN8sRKX7CrGZ855JvkiYZ9PWsUhaKc9AXag3q0byKgelLcRKeDL2-jdgD5CF9BBY1Rwp9xCjUQnYVQbxmo97OvbfQ0N9r2NdnSK4PvjK-52d3LGcyj18XevlgyQ0bAut-sDtJp0Qxhu2EWn-qgnf7xm08eH8n6TNsFGsr7yGFSV8ULmVSHkSor_Hz_loFHu</recordid><startdate>2020</startdate><enddate>2020</enddate><creator>Aad, Georges</creator><creator>Abbott, Brad</creator><creator>Abbott, Dale C</creator><creator>Abed Abud, Adam</creator><creator>Abeling, Kira</creator><creator>Abhayasinghe, Deshan Kavishka</creator><creator>Abidi, Syed Haider</creator><creator>AbouZeid, Hass</creator><creator>Abraham, Nadine L</creator><creator>Abramowicz, Halina</creator><creator>Bjørke, Kristian</creator><creator>Bugge, Magnar Kopangen</creator><creator>Cameron, David Gordon</creator><creator>Catmore, James Richard</creator><creator>Garonne, Vincent</creator><creator>Gramstad, Eirik</creator><creator>Hellesund, Simen</creator><creator>Morisbak, Vanja</creator><creator>Oppen, Henrik</creator><creator>Ould-Saada, Farid</creator><creator>Pedersen, Maiken</creator><creator>Read, Alexander Lincoln</creator><creator>Rye, Eli Bæverfjord</creator><creator>Røhne, Ole Myren</creator><creator>Sandaker, Heidi</creator><creator>Vadla, Knut Oddvar Høie</creator><creator>Buanes, Trygve</creator><creator>Djuvsland, Julia Isabell</creator><creator>Eigen, Gerald</creator><creator>Fomin, Nikolai</creator><creator>Lee, Graham Richard</creator><creator>Lipniacka, Anna</creator><creator>Martin dit Latour, Bertrand</creator><creator>Stugu, Bjarne</creator><creator>Træet, Are Sivertsen</creator><creator>Abreu, Henso</creator><creator>Abulaiti, Yiming</creator><creator>Acharya, Bobby S</creator><creator>Achkar, Baida</creator><creator>Adachi, Shunsuke</creator><creator>Adam, Lennart</creator><creator>Adam-Bourdarios, Claire</creator><creator>Adamczyk, Leszek</creator><creator>Adamek, Lukas</creator><creator>Adelman, Jareed</creator><creator>Adersberger, Michael</creator><creator>Adigüzel, Aytül</creator><creator>Adorni, Sofia</creator><creator>Adye, Tim</creator><creator>Affolder, Anthony Allen</creator><creator>ATLAS, Collaboration</creator><general>North-Holland</general><scope>3HK</scope></search><sort><creationdate>2020</creationdate><title>Measurement of azimuthal anisotropy of muons from charm and bottom hadrons in Pb+Pb collisions at √sNN=5.02 TeV TeV with the ATLAS detector</title><author>Aad, Georges ; 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B</jtitle><date>2020</date><risdate>2020</risdate><issn>0370-2693</issn><eissn>1873-2445</eissn><abstract>Azimuthal anisotropies of muons from charm and bottom hadron decays are measured in Pb+Pb collisions at √sNN=5.02TeV. The data were collected with the ATLAS detector at the Large Hadron Collider in 2015 and 2018 with integrated luminosities of 0.5nb−1 and 1.4nb−1, respectively. The kinematic selection for heavy-flavor muons requires transverse momentum 4 &lt; pT &lt; 30GeV and pseudorapidity |η| &lt; 2.0. The dominant sources of muons in this pT range are semi-leptonic decays of charm and bottom hadrons. These heavy-flavor muons are separated from light-hadron decay muons and punch-through hadrons using the momentum imbalance between the measurements in the tracking detector and in the muon spectrometers. 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title Measurement of azimuthal anisotropy of muons from charm and bottom hadrons in Pb+Pb collisions at √sNN=5.02 TeV TeV with the ATLAS detector
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