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Rapidity and transverse momentum dependence of inclusive J/ψ production in pp collisions at sqrt(s) = 7 TeV

(ALICE Collaboration) Aamodt, K.; Quintana, A. Abrahantes; Adamova, D.; Adare, A. M.; Aggarwal, M. M.; Rinella, G. Aglieri; Agocs, A. G.; Agostinelli, A.; Salazar, S. Aguilar; Ahammed, Z.; Ahmad, N.; Masoodi, A. Ahmad; Ahn, S. U.; Akindinov, A.; Aleksandrov, D.; Alessandro, B.; Molina, R. Alfaro; Alici, A.; Alkin, A.; Avina, E. Almaraz; Alme, J.; Alt, T.; Altini, V.; Altsybeev, I.; Andrei, C.; Andronic, A.; Anguelov, V.; Anson, C.; Anticic, T.; Antinori, F.; Antonioli, P.; Aphecetche, L.; Appelshaeuser, H.; Arbor, N.; Arcelli, S.; Arend, A.; Armesto, N.; Arnaldi, R.; Aronsson, T.; Arsene, I. C.; Asryan, A.; Augustinus, A.; Averbeck, R.; Awes, T. C.; Aysto, J.; Azmi, M. D.; Bach, M.; Badala, A.; Baek, Y. W.; Bailhache, R.; Bala, R.; Ferroli, R. Baldini; Baldisseri, A.; Baldit, A.; Ban, J.; Barbera, R.; Barile, F.; Barnafoeldi, G. G.; Barnby, L. S.; Barret, V.; Bartke, J.; Basile, M.; Bastid, N.; Bathen, B.; Batigne, G.; Batyunya, B.; Baumann, C.; Bearden, I. G.; Beck, H.; Belikov, I.; Bellini, F.; Bellwied, R.; Belmont-Moreno, E.; Beole, S.; Berceanu, I.; Bercuci, A.; Berdermann, E.; Berdnikov, Y.; Bergmann, C.; Betev, L.; Bhasin, A.; Bhati, A. K.; Bianchi, L.; Bianchi, N.; Bianchin, C.; Bielcik, J.; Bielcikova, J.; Bilandzic, A.; Biolcati, E.; Blanc, A.; Blanco, F.; Blanco, F.; Blau, D.; Blume, C.; Bock, N.; Bogdanov, A.; Boggild, H.; Bogolyubsky, M.; Boldizsar, L.; Bombara, M.; Bombonati, C.; Book, J.; Borel, H.; Borissov, A.; Bortolin, C.; Bose, S.; Bossu, F.; Botje, M.; Boettger, S.; Boyer, B.; . (2011) Rapidity and transverse momentum dependence of inclusive J/ψ production in pp collisions at sqrt(s) = 7 TeV. Physics Letters B, 704 (5). pp. 442-455. ISSN 0370-2693

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The ALICE experiment at the LHC has studied inclusive J/ψ production at central and forward rapidities in pp collisions at √s = 7 TeV. In this Letter, we report on the first results obtained detecting the J/ψ through the dilepton decay into e+e− and μ+μ− pairs in the rapidity ranges |y| < 0.9 and 2.5 < y < 4, respectively, and with acceptance down to zero pT. In the dielectron channel the analysis was carried out on a data sample corresponding to an integrated luminosity Lint = 5.6 nb−1 and the number of signal events is NJ/ψ = 352 ± 32 (stat.) ± 28 (syst.) ; the corresponding figures in the dimuon channel are Lint = 15.6 nb−1 and NJ/ψ = 1924 ± 77 (stat.) ± 144 (syst.). The measured production cross sections are σJ/ψ (|y| < 0.9) = 10.7 ± 1.0 (stat.) ± 1.6 (syst.) +1.6 −2.3 (syst.pol.) μb and σJ/ψ (2.5 < y < 4) = 6.31 ± 0.25 (stat.)±0.76 (syst.) +0.95 −1.96 (syst.pol.) μb. The differential cross sections, in transverse momentum and rapidity, of the J/ψ were also measured.

Item Type: Article
Uncontrolled Keywords: ALICE; LHC; J/Psi; 7 TeV; p+p
Subjects: NATURAL SCIENCES > Physics
Divisions: Division of Experimental Physics
Project titleProject leaderProject codeProject type
Experimental physics at LHC energies (Eksperimentalna fizika na LHC energijama)-Krešo Kadija098-0982887-2878MZOS
Depositing User: Tome Antičić
Date Deposited: 23 Feb 2016 16:40
DOI: 10.1016/j.physletb.2011.09.054

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