Measurement of quarkonium production in proton-lead and proton-proton collisions at 5.02 TeV with the ATLAS detector

• Published in: The European physical journal. C, Particles and fields Vol. 78; no. 3; pp. 171 - 32
• Main Authors: Aaboud, M, Aad, G, Abbott, B, Abdallah, J, Abdinov, O, Abeloos, B, Abidi, S H, AbouZeid, O S, Abraham, N L, Abramowicz, H, Abreu, H, Abreu, R, Abulaiti, Y, Acharya, B S, Adachi, S, Adamczyk, L, Adelman, J, Adersberger, M, Adye, T, Affolder, A A, Agatonovic-Jovin, T, Agheorghiesei, C, Aguilar-Saavedra, J A, Ahlen, S P, Ahmadov, F, Aielli, G, Akatsuka, S, Akerstedt, H, Åkesson, T P A, Akimov, A V, Alberghi, G L, Albert, J, Alconada Verzini, M J, Aleksa, M, Aleksandrov, I N, Alexa, C, Alexander, G, Alexopoulos, T, Alhroob, M, Ali, B, Aliev, M, Alimonti, G, Alison, J, Alkire, S P, Allbrooke, B M M, Allen, B W, Allport, P P, Aloisio, A, Alonso, A, Alonso, F, Alpigiani, C, Alshehri, A A, Alstaty, M I, Alvarez Gonzalez, B, Álvarez Piqueras, D, Alviggi, M G, Amadio, B T, Amaral Coutinho, Y, Amelung, C, Amidei, D, Amor Dos Santos, S P, Amorim, A, Amoroso, S, Amundsen, G, Anastopoulos, C, Ancu, L S, Andari, N, Andeen, T, Anders, C F, Anders, J K, Anderson, K J, Andreazza, A, Andrei, V, Angelidakis, S, Angelozzi, I, Angerami, A, Anisenkov, A V, Anjos, N, Annovi, A, Antel, C, Antonelli, M, Antonov, A, Antrim, D J, Anulli, F, Aoki, M, Aperio Bella, L, Arabidze, G, Arai, Y, Araque, J P, Araujo Ferraz, V, Arce, A T H, Ardell, R E, Arduh, F A, Arguin, J-F, Argyropoulos, S, Arik, M, Armbruster, A J, Armitage, L J, Arnaez, O, Arnold, H
• Format: Journal Article
• Language: English
• Published: France Springer Nature B.V 2018; Springer Berlin/Heidelberg
• Subjects: Large Hadron Collider; Particle collisions; Protons; Transverse momentum
• ISSN: 1434-6044; 1434-6052; 1434-6052
• DOI: 10.1140/epjc/s10052-018-5624-4

The modification of the production of
,
, and
(
) in
+Pb collisions with respect to their production in
collisions has been studied. The
+Pb and
datasets used in this paper correspond to integrated luminosities of
and
respectively, collected in 2013 and 2015 by the ATLAS detector at the LHC, both at a centre-of-mass energy per nucleon pair of 5.02 TeV. The quarkonium states are reconstructed in the dimuon decay channel. The yields of
and
are separated into prompt and non-prompt sources. The measured quarkonium differential cross sections are presented as a function of rapidity and transverse momentum, as is the nuclear modification factor,
for
and
. No significant modification of the
production is observed while
production is found to be suppressed at low transverse momentum in
+Pb collisions relative to
collisions. The production of excited charmonium and bottomonium states is found to be suppressed relative to that of the ground states in central
+Pb collisions.