Rapidity and transverse momentum dependence of inclusive J/ψproduction in pp collisions at √s = 7 TeV
Articolo
Data di Pubblicazione:
2011
Abstract:
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 its dilepton decay into e+e− and μ+μ− pairs in the rapidity range |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 L(int) = 3.9 nb−1 and the number of signal events is N(J/ψ) = 249 ± 27 (stat.) ± 20 (syst.); the corresponding figures in the dimuon channel are L(int) = 15.6 nb−1 and N(J/ψ) = 1924 ± 77 (stat.) ± 144 (syst.). The measured
production cross sections are σ(J/ψ)(|y| < 0.9) = 10.7 ± 1.2 (stat.) ± 1.7 (syst.) +1.6 −2.3 (syst.pol.) μb, and σ(J/ψ) (2.5 < y < 4) = 6.31 ± 0.25 (stat.) ± 0.80 (syst.) +0.95 −1.96 (syst.pol.) μb. The differential cross sections, in transverse momentum and rapidity, of the J/ψ were also measured.
Tipologia CRIS:
1.1 Articolo in rivista
Keywords:
ALICE; rapidity; transverse momentum
Elenco autori:
Aamodt 1, K.; Abrahantes Quintana 2, A.; Adamová3, D.; Adare4, A. M.; Aggarwal 5, M. M.; Aglieri Rinella 6, G.; Agocs 7, A. G.; Agostinelli 8, A.; Aguilar Salazar 9, S.; Ahammed 10, Z.; Ahmad11, N.; Ahmad Masoodi 11, A.; Ahn 12, S. U.; I, ; Akindinov 13, A.; Aleksandrov14, D.; Alessandro 15, B.; Alfaro Molina 9, R.; Alici 16, A.; Alkin 17, A.; Almaráz Aviña 9, E.; Alme18, J.; Alt19, T.; Altini 20, V.; Ii, ; Altsybeev21, I.; Andrei 22, C.; Andronic 23, A.; Anguelov 19, V.; Iii, ; Anson 24, C.; Antiˇci ´c 25, T.; Antinori 26, F.; Antonioli 27, P.; Aphecetche28, L.; Appelshäuser 29, H.; Arbor30, N.; Arcelli 8, S.; Arend29, A.; Armesto31, N.; Arnaldi 15, R.; Aronsson 4, T.; Arsene 23, I. C.; Asryan21, A.; Augustinus 6, A.; Averbeck23, R.; Awes32, T. C.; Äystö33, J.; Azmi 11, M. D.; Bach 19, M.; Badalà 34, A.; Baek12, Y. W.; I, ; Bailhache 29, R.; Bala15, R.; Baldini Ferroli 16, R.; Baldisseri 35, A.; Baldit 36, A.; Bán37, J.; Barbera38, R.; Barile 20, F.; Barnaföldi 7, G. G.; Barnby 39, L. S.; Barret36, V.; Bartke40, J.; Basile 8, M.; Bastid36, N.; Bathen41, B.; Batigne 28, G.; Batyunya42, B.; Baumann29, C.; Bearden 43, I. G.; Beck 29, H.; Belikov44, I.; Bellini 8, F.; Bellwied 45, R.; Belmont-Moreno 9, E.; Beole46, S.; Berceanu22, I.; Bercuci 22, A.; Berdermann23, E.; Berdnikov47, Y.; Bergmann 41, C.; Betev6, L.; Bhasin48, A.; Bhati 5, A. K.; Bianchi 46, L.; Bianchi 49, N.; Bianchin 50, C.; Bielˇcík 51, J.; Bielˇcíková 3, J.; Bilandzic 52, A.; Biolcati 46, E.; Blanc 36, A.; Blanco53, F.; Blanco45, F.; Blau14, D.; Blume29, C.; Bock24, N.; Bogdanov54, A.; Bøggild 43, H.; Bogolyubsky 55, M.; Boldizsár7, L.; Bombara56, M.; Bombonati 50, C.; Book 29, J.; Borel 35, H.; Borissov 57, A.; Bortolin 50, C.; Iv, ; Bose 58, S.; Bossú 6, F.; V, ; Botje52, M.; Böttger 59, S.; Boyer60, B.; Braun-Munzinger 23, P.; Bravina 61, L.; Bregant28, M.; Breitner 59, T.; Broz62, M.; Brun6, R.; Bruna 4, E.; Bruno 20, G. E.; Budnikov63, D.; Buesching 29, H.; Bufalino 46, S.; Busch64, O.; Buthelezi 65, Z.; Caffarri 50, D.; Cai 66, X.; Caines4, H.; Calvo Villar 67, E.; Camerini 68, P.; Canoa Roman69, V.; Vi, ; Cara Romeo27, G.; Carena6, F.; Carena6, W.; Carminati 6, F.; Casanova Díaz 49, A.; Caselle 6, M.; Castillo Castellanos 35, J.; Catanescu 22, V.; Cavicchioli 6, C.; Cepila 51, J.; Cerello 15, P.; Chang 33, B.; Chapeland 6, S.; Charvet 35, J. L.; Chattopadhyay58, S.; Chattopadhyay 10, S.; Cherney 70, M.; Cheshkov71, C.; Cheynis 71, B.; Chiavassa 46, E.; Chibante Barroso 6, V.; Chinellato 72, D. D.; Chochula6, P.; Chojnacki 73, M.; Christakoglou 73, P.; Christensen 43, C. H.; Christiansen 74, P.; Chujo 75, T.; Cicalo 76, C.; Cifarelli 8, L.; Ii, ; Cindolo27, F.; Cleymans65, J.; Coccetti 16, F.; Coffin44, J. -P.; Conesa Balbastre30, G.; Conesa del Valle 44, Z.; Ii, ; Constantin64, P.; Contin68, G.; Contreras 69, J. G.; Cormier 57, T. M.; Corrales Morales 46, Y.; Cortés Maldonado 77, I.; Cortese 78, P.; Cosentino 72, M. R.; Costa6, F.; Cotallo 53, M. E.; Crescio69, E.; Crochet36, P.; Cuautle 79, E.; Cunqueiro 49, L.; Erasmo 20, G. D.; Dainese26, A.; Dalsgaard 43, H. H.; Danu80, A.; Das58, D.; Das58, I.; Dash81, A.; Dash15, S.; De 10, S.; De Azevedo Moregula 49, A.; de Barros 82, G. O. V.; De Caro83, A.; de Cataldo 84, G.; de Cuveland 19, J.; De Falco 85, A.; De Gruttola83, D.; De Marco15, N.; De Pasquale 83, S.; de Rooij 73, R.; Del Castillo Sanchez 6, E.; Delagrange28, H.; Delgado Mercado 67, Y.; Dellacasa 78, G.; Vii, ; Deloff 86, A.; Demanov63, V.; Dénes 7, E.; Deppman 82, A.; Di Bari 20, D.; Di Giglio 20, C.; Di Liberto87, S.; Di Mauro6, A.; Di Nezza 49, P.; Dietel 41, T.; Divià 6, R.; Djuvsland 1, Ø.; Dobrin 57, A.; Dobrowolski 86, T.; Domínguez 79, I.; Dönigus 23, B.; Dordic 61, O.; Driga28, O.; Dubey10, A. K.; Ducroux 71, L.; Dupieux 36, P.; Dutta Majumdar 58, A. K.; Dutta
Majumdar 10, M. R.; Elia84, D.; Emschermann 41, D.; Engel 59, H.; Erdal 18, H. A.; Espagnon60, B.; Estienne 28, M.; Esumi 75, S.; Ev
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