Charged-particle multiplicity density at mid-rapidity in central Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV

Autor: Aamodt, K, Abelev, B, Quintana, A Abrahantes, Adamová, D, Adare, A M, Aggarwal, M M, Rinella, G Aglieri, Agocs, A G, Salazar, S Aguilar, Ahammed, Z, Masoodi, A Ahmad, Ahmad, N, Ahn, S U, Akindinov, A, Aleksandrov, D, Alessandro, B, Molina, R Alfaro, Alici, A, Alkin, A, Aviña, E Almaráz, Alt, T, Altini, V, Altinpinar, S, Altsybeev, I, Andrei, C, Andronic, A, Anguelov, V, Anson, C, Antičić, T, Antinori, F, Antonioli, P, Aphecetche, L, Appelshäuser, 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, Aystö, J, Azmi, M D, Bach, M, Badalà, A, Baek, Y W, Bagnasco, S, Bailhache, R, Bala, R, Ferroli, R Baldini, Baldisseri, A, Baldit, A, Pedrosa, F Baltasar Dos Santos, Bán, J, Barbera, R, Barile, F, Barnaföldi, 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, Bielčík, J, Bielčíková, J, Bilandzic, A, Biolcati, E, Blanc, A, Blanco, F, Blau, D, Blume, C, Boccioli, M, Bock, N, Bogdanov, A, Bøggild, H, Bogolyubsky, M, Boldizsár, L, Bombara, M, Bombonati, C, Book, J, Borel, H, Borissov, A, Bortolin, C, Bose, S, Bossú, F, Botje, M, Böttger, S, Boyer, B, Braun-Munzinger, P, Bravina, L, Bregant, M, Breitner, T, Broz, M, Brun, R, Bruna, E, Bruno, G E, Budnikov, D, Buesching, H, Bugaiev, K, Busch, O, Buthelezi, Z, Caffarri, D, Cai, X, Caines, H, Villar, E Calvo, Camerini, P, Roman, V Canoa, Romeo, G Cara, Carena, F, Carena, W, Carminati, F, Díaz, A Casanova, Caselle, M, Castellanos, J Castillo, Catanescu, V, Cavicchioli, C, Cepila, J, Cerello, P, Chang, B, Chapeland, S, Charvet, J L, Chattopadhyay, S, Cherney, M, Cheshkov, C, Cheynis, B, Chiavassa, E, Barroso, V Chibante, Chinellato, D D, Chochula, P, Chojnacki, M, Christakoglou, P, Christensen, C H, Christiansen, P, Chujo, T, Cicalo, C, Cifarelli, L, Cindolo, F, Cleymans, J, Coccetti, F, Coffin, J-P, Coli, S, Balbastre, G Conesa, Del Valle, Z Conesa, Constantin, P, Contin, G, Contreras, J G, Cormier, T M, Morales, Y Corrales, Maldonado, I Cortés, Cortese, P, Cosentino, M R, Costa, F, Cotallo, M E, Crescio, E, Crochet, P, Cuautle, E, Cunqueiro, L, Erasmo, G D, Dainese, A, Dalsgaard, H H, Danu, A, Das, D, Das, I, Das, K, Dash, A, Dash, S, De, S, Moregula, A De Azevedo, de Barros, G O V, De Caro, A, de Cataldo, G, de Cuveland, J, De Falco, A, De Gruttola, D, De Marco, N, De Pasquale, S, De Remigis, R, de Rooij, R, Debski, P R, Sanchez, E Del Castillo, Delagrange, H, Mercado, Y Delgado, Dellacasa, G, Deloff, A, Demanov, V, Dénes, E, Deppman, A, Di Bari, D, Di Giglio, C, Di Liberto, S, Di Mauro, A, Di Nezza, P, Dietel, T, Divià, R, Djuvsland, Ø, Dobrin, A, Dobrowolski, T, Domínguez, I, Dönigus, B, Dordic, O, Driga, O, Dubey, A K, Dubuisson, J, Ducroux, L, Dupieux, P, Majumdar, A K Dutta, Majumdar, M R Dutta, Elia, D, Emschermann, D, Engel, H, Erdal, H A, Espagnon, B, Estienne, M, Esumi, S, Evans, D, Evrard, S, Eyyubova, G, Fabjan, C W, Fabris, D, Faivre, J, Falchieri, D, Fantoni, A, Fasel, M, Fearick, R, Fedunov, A, Fehlker, D, Fekete, V, Felea, D, Feofilov, G, Téllez, A Fernández, Ferretti, A, Ferretti, R, Figiel, J, Figueredo, M A S, Filchagin, S, Fini, R, Finogeev, D, Fionda, F M, Fiore, E M, Floris, M, Foertsch, S, Foka, P, Fokin, S, Fragiacomo, E, Fragkiadakis, M, Frankenfeld, U, Fuchs, U, Furano, F, Furget, C, Girard, M Fusco, Gaardhøje, J J, Gadrat, S, Gagliardi, M, Gago, A, Gallio, M, Gangadharan, D R, Ganoti, P, Ganti, M S, Garabatos, C, Garcia-Solis, E, Garishvili, I, Gemme, R, Gerhard, J, Germain, M, Geuna, C, Gheata, A, Gheata, M, Ghidini, B, Ghosh, P, Gianotti, P, Girard, M R, Giraudo, G, Giubellino, P, Gladysz-Dziadus, E, Glässel, P, Gomez, R, Ferreiro, E G, Santos, H González, González-Trueba, L H, 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Přispěvatelé: Laboratoire de Physique Corpusculaire, Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire SUBATECH Nantes (SUBATECH), Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), ALICE, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre de Calcul de l'IN2P3 (CC-IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Jazyk: angličtina
Rok vydání: 2010
Předmět:
Zdroj: Physical Review Letters
Physical Review Letters, 2010, 105, pp.252301. ⟨10.1103/PhysRevLett.105.252301⟩
Physical Review Letters, American Physical Society, 2010, 105, pp.252301. ⟨10.1103/PhysRevLett.105.252301⟩
ISSN: 0031-9007
1079-7114
DOI: 10.1103/PhysRevLett.105.252301⟩
Popis: The first measurement of the charged-particle multiplicity density at mid-rapidity in Pb-Pb collisions at a centre-of-mass energy per nucleon pair $\sqrt{s_{\rm NN}}$ = 2.76 TeV is presented. For an event sample corresponding to the most central 5% of the hadronic cross section the pseudo-rapidity density of primary charged particles at mid-rapidity is 1584 $\pm$ 4 (stat) $\pm$ 76 (sys.), which corresponds to 8.3 $\pm$ 0.4 (sys.) per participating nucleon pair. This represents an increase of about a factor 1.9 relative to pp collisions at similar collision energies, and about a factor 2.2 to central Au-Au collisions at $\sqrt{s_{\rm NN}}$ = 0.2 TeV. This measurement provides the first experimental constraint for models of nucleus-nucleus collisions at LHC energies.
10 pages, 4 captioned figures, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/3895
Databáze: OpenAIRE