Energy dependence of forward-rapidity J/psi and psi (2S) production in pp collisions at the LHC

S. Acharya; D. Adamova; M.M. Aggarwal; G.A. Rinella; Maria Agnello; N. Agrawal; Z. Ahammed; S. U. Ahn; S. Aiola; A. Akindinov; S. Alam; D.S.D. Albuquerque; D. Aleksandrov; B. Alessandro; A. Alici; Ian Bearden; Christian Holm Christensen; Marek Chojnacki; Jens Jørgen Gaardhøje; Kristjan Herlache Gulbrandsen; Christian Alexander Bourjau; Børge Svane Nielsen; You Zhou; Valentina Zaccolo; Katarina Gajdosova; Lais Ozelin de Lima Pimentel; Vojtech Pacik

doi:10.1140/epjc/s10052-017-4940-4

Energy dependence of forward-rapidity J/psi and psi (2S) production in pp collisions at the LHC

S. Acharya, D. Adamova, M.M. Aggarwal, G.A. Rinella, Maria Agnello, N. Agrawal, Z. Ahammed, S. U. Ahn, S. Aiola, A. Akindinov, S. Alam, D.S.D. Albuquerque, D. Aleksandrov, B. Alessandro, A. Alici, Ian Bearden, Christian Holm Christensen, Marek Chojnacki, Jens Jørgen Gaardhøje, Kristjan Herlache GulbrandsenChristian Alexander Bourjau, Børge Svane Nielsen, You Zhou, Valentina Zaccolo, Katarina Gajdosova, Lais Ozelin de Lima Pimentel, Vojtech Pacik

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Abstract

We present results on transverse momentum (pT) and rapidity (y) differential production cross sections, mean transverse momentum and mean transverse momentum square of inclusive J / ψ and ψ(2 S) at forward rapidity (2.5 < y< 4) as well as ψ(2 S) -to-J / ψ cross section ratios. These quantities are measured in pp collisions at center of mass energies s=5.02 and 13 TeV with the ALICE detector. Both charmonium states are reconstructed in the dimuon decay channel, using the muon spectrometer. A comprehensive comparison to inclusive charmonium cross sections measured at s=2.76, 7 and 8 TeV is performed. A comparison to non-relativistic quantum chromodynamics and fixed-order next-to-leading logarithm calculations, which describe prompt and non-prompt charmonium production respectively, is also presented. A good description of the data is obtained over the full pT range, provided that both contributions are summed. In particular, it is found that for pT>15 GeV/c the non-prompt contribution reaches up to 50% of the total charmonium yield.

Originalsprog	Engelsk
Artikelnummer	392
Tidsskrift	European Physical Journal C
Vol/bind	77
Udgave nummer	6
ISSN	1434-6044
DOI	https://doi.org/10.1140/epjc/s10052-017-4940-4
Status	Udgivet - 1 jun. 2017

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10.1140/epjc/s10052-017-4940-4Licens: CC BY

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Acharya, S., Adamova, D., Aggarwal, M. M., Rinella, G. A., Agnello, M., Agrawal, N., Ahammed, Z., U. Ahn, S., Aiola, S., Akindinov, A., Alam, S., Albuquerque, D. S. D., Aleksandrov, D., Alessandro, B., Alici, A., Bearden, I., Christensen, C. H., Chojnacki, M., Gaardhøje, J. J., ... Pacik, V. (2017). Energy dependence of forward-rapidity J/psi and psi (2S) production in pp collisions at the LHC. European Physical Journal C, 77(6), [392]. https://doi.org/10.1140/epjc/s10052-017-4940-4

Acharya, S, Adamova, D, Aggarwal, MM, Rinella, GA, Agnello, M, Agrawal, N, Ahammed, Z, U. Ahn, S, Aiola, S, Akindinov, A, Alam, S, Albuquerque, DSD, Aleksandrov, D, Alessandro, B, Alici, A, Bearden, I , Christensen, CH, Chojnacki, M, Gaardhøje, JJ , Gulbrandsen, KH, Bourjau, CA, Nielsen, BS , Zhou, Y, Zaccolo, V, Gajdosova, K, Pimentel, LODL & Pacik, V 2017, 'Energy dependence of forward-rapidity J/psi and psi (2S) production in pp collisions at the LHC', European Physical Journal C, bind 77, nr. 6, 392. https://doi.org/10.1140/epjc/s10052-017-4940-4

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title = "Energy dependence of forward-rapidity J/psi and psi (2S) production in pp collisions at the LHC",

abstract = "We present results on transverse momentum (pT) and rapidity (y) differential production cross sections, mean transverse momentum and mean transverse momentum square of inclusive J / ψ and ψ(2 S) at forward rapidity (2.5 < y< 4) as well as ψ(2 S) -to-J / ψ cross section ratios. These quantities are measured in pp collisions at center of mass energies s=5.02 and 13 TeV with the ALICE detector. Both charmonium states are reconstructed in the dimuon decay channel, using the muon spectrometer. A comprehensive comparison to inclusive charmonium cross sections measured at s=2.76, 7 and 8 TeV is performed. A comparison to non-relativistic quantum chromodynamics and fixed-order next-to-leading logarithm calculations, which describe prompt and non-prompt charmonium production respectively, is also presented. A good description of the data is obtained over the full pT range, provided that both contributions are summed. In particular, it is found that for pT>15 GeV/c the non-prompt contribution reaches up to 50% of the total charmonium yield.",

author = "S. Acharya and D. Adamova and M.M. Aggarwal and G.A. Rinella and Maria Agnello and N. Agrawal and Z. Ahammed and {U. Ahn}, S. and S. Aiola and A. Akindinov and S. Alam and D.S.D. Albuquerque and D. Aleksandrov and B. Alessandro and A. Alici and Ian Bearden and Christensen, {Christian Holm} and Marek Chojnacki and Gaardh{\o}je, {Jens J{\o}rgen} and Gulbrandsen, {Kristjan Herlache} and Bourjau, {Christian Alexander} and Nielsen, {B{\o}rge Svane} and You Zhou and Valentina Zaccolo and Katarina Gajdosova and Pimentel, {Lais Ozelin de Lima} and Vojtech Pacik",

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month = jun,

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doi = "10.1140/epjc/s10052-017-4940-4",

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T1 - Energy dependence of forward-rapidity J/psi and psi (2S) production in pp collisions at the LHC

AU - Acharya, S.

AU - Adamova, D.

AU - Aggarwal, M.M.

AU - Rinella, G.A.

AU - Agnello, Maria

AU - Agrawal, N.

AU - Ahammed, Z.

AU - U. Ahn, S.

AU - Aiola, S.

AU - Akindinov, A.

AU - Alam, S.

AU - Albuquerque, D.S.D.

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Alici, A.

AU - Bearden, Ian

AU - Christensen, Christian Holm

AU - Chojnacki, Marek

AU - Gaardhøje, Jens Jørgen

AU - Gulbrandsen, Kristjan Herlache

AU - Bourjau, Christian Alexander

AU - Nielsen, Børge Svane

AU - Zhou, You

AU - Zaccolo, Valentina

AU - Gajdosova, Katarina

AU - Pimentel, Lais Ozelin de Lima

AU - Pacik, Vojtech

PY - 2017/6/1

Y1 - 2017/6/1

N2 - We present results on transverse momentum (pT) and rapidity (y) differential production cross sections, mean transverse momentum and mean transverse momentum square of inclusive J / ψ and ψ(2 S) at forward rapidity (2.5 < y< 4) as well as ψ(2 S) -to-J / ψ cross section ratios. These quantities are measured in pp collisions at center of mass energies s=5.02 and 13 TeV with the ALICE detector. Both charmonium states are reconstructed in the dimuon decay channel, using the muon spectrometer. A comprehensive comparison to inclusive charmonium cross sections measured at s=2.76, 7 and 8 TeV is performed. A comparison to non-relativistic quantum chromodynamics and fixed-order next-to-leading logarithm calculations, which describe prompt and non-prompt charmonium production respectively, is also presented. A good description of the data is obtained over the full pT range, provided that both contributions are summed. In particular, it is found that for pT>15 GeV/c the non-prompt contribution reaches up to 50% of the total charmonium yield.

AB - We present results on transverse momentum (pT) and rapidity (y) differential production cross sections, mean transverse momentum and mean transverse momentum square of inclusive J / ψ and ψ(2 S) at forward rapidity (2.5 < y< 4) as well as ψ(2 S) -to-J / ψ cross section ratios. These quantities are measured in pp collisions at center of mass energies s=5.02 and 13 TeV with the ALICE detector. Both charmonium states are reconstructed in the dimuon decay channel, using the muon spectrometer. A comprehensive comparison to inclusive charmonium cross sections measured at s=2.76, 7 and 8 TeV is performed. A comparison to non-relativistic quantum chromodynamics and fixed-order next-to-leading logarithm calculations, which describe prompt and non-prompt charmonium production respectively, is also presented. A good description of the data is obtained over the full pT range, provided that both contributions are summed. In particular, it is found that for pT>15 GeV/c the non-prompt contribution reaches up to 50% of the total charmonium yield.

U2 - 10.1140/epjc/s10052-017-4940-4

DO - 10.1140/epjc/s10052-017-4940-4

M3 - Journal article

C2 - 28775665

SN - 1434-6044

VL - 77

JO - The European Physical Journal C: Particles and Fields

JF - The European Physical Journal C: Particles and Fields

IS - 6

M1 - 392

ER -

Energy dependence of forward-rapidity J/psi and psi (2S) production in pp collisions at the LHC

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