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Charged-particle multiplicity measurement in proton-proton collisions at root s=7 TeV with ALICE at LHC

Aamodt, K. ; Abel, N. ; Abeysekara, U. ; Abrahantes Quintana, A. ; Abramyan, A. ; Adamova, D. ; Aggarwal, M. M. ; Aglieri Rinella, G. ; Agocs, A. G. and Aguilar Salazar, S. , et al. (2010) In European Physical Journal C. Particles and Fields 68(3-4). p.345-354
Abstract
The pseudorapidity density and multiplicity distribution of charged particles produced in proton-proton collisions at the LHC, at a centre-of-mass energy root s = 7 TeV, were measured in the central pseudorapidity region vertical bar eta vertical bar < 1. Comparisons are made with previous measurements at root s = 0.9 TeV and 2.36 TeV. At root s = 7 TeV, for events with at least one charged particle in |eta vertical bar| < 1, we obtain dN(ch)/d eta = 6.01 +/- 0.01(stat.)(-0.12)(+0.20) (syst.). This corresponds to an increase of 57.6%+/-0.4%(stat.)(-1.8%)(+3.6) (syst.) relative to collisions at 0.9 TeV, significantly higher than calculations from commonly used models. The multiplicity distribution at 7 TeV is described fairly well by... (More)
The pseudorapidity density and multiplicity distribution of charged particles produced in proton-proton collisions at the LHC, at a centre-of-mass energy root s = 7 TeV, were measured in the central pseudorapidity region vertical bar eta vertical bar < 1. Comparisons are made with previous measurements at root s = 0.9 TeV and 2.36 TeV. At root s = 7 TeV, for events with at least one charged particle in |eta vertical bar| < 1, we obtain dN(ch)/d eta = 6.01 +/- 0.01(stat.)(-0.12)(+0.20) (syst.). This corresponds to an increase of 57.6%+/-0.4%(stat.)(-1.8%)(+3.6) (syst.) relative to collisions at 0.9 TeV, significantly higher than calculations from commonly used models. The multiplicity distribution at 7 TeV is described fairly well by the negative binomial distribution. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
European Physical Journal C. Particles and Fields
volume
68
issue
3-4
pages
345 - 354
publisher
Springer
external identifiers
  • wos:000280642600001
  • scopus:77955249568
ISSN
1434-6044
DOI
10.1140/epjc/s10052-010-1350-2
language
English
LU publication?
yes
id
552c5e55-c038-4cd9-b1f9-6e1e81d31ec9 (old id 1675496)
date added to LUP
2016-04-01 12:53:03
date last changed
2023-01-03 19:42:02
@article{552c5e55-c038-4cd9-b1f9-6e1e81d31ec9,
  abstract     = {{The pseudorapidity density and multiplicity distribution of charged particles produced in proton-proton collisions at the LHC, at a centre-of-mass energy root s = 7 TeV, were measured in the central pseudorapidity region vertical bar eta vertical bar &lt; 1. Comparisons are made with previous measurements at root s = 0.9 TeV and 2.36 TeV. At root s = 7 TeV, for events with at least one charged particle in |eta vertical bar| &lt; 1, we obtain dN(ch)/d eta = 6.01 +/- 0.01(stat.)(-0.12)(+0.20) (syst.). This corresponds to an increase of 57.6%+/-0.4%(stat.)(-1.8%)(+3.6) (syst.) relative to collisions at 0.9 TeV, significantly higher than calculations from commonly used models. The multiplicity distribution at 7 TeV is described fairly well by the negative binomial distribution.}},
  author       = {{Aamodt, K. and Abel, N. and Abeysekara, U. and Abrahantes Quintana, A. and Abramyan, A. and Adamova, D. and Aggarwal, M. M. and Aglieri Rinella, G. and Agocs, A. G. and Aguilar Salazar, S. and Ahammed, Z. and Ahmad, A. and Ahmad, N. and Ahn, S. U. and Akimoto, R. and Akindinov, A. and Aleksandrov, D. and Alessandro, B. and Alfaro Molina, R. and Alici, A. and Almaraz Avia, E. and Alme, J. and Alt, T. and Altini, V. and Altinpinar, S. and Andrei, C. and Andronic, A. and Anelli, G. and Angelov, V. and Anson, C. and Anticic, T. and Antinori, F. and Antinori, S. and Antipin, K. and Antonczyk, D. and Antonioli, P. and Anzo, A. and Aphecetche, L. and Appelshauser, H. and Arcelli, S. and Arceo, R. and Arend, A. and Armesto, N. and Arnaldi, R. and Aronsson, T. and Arsene, I. C. and Asryan, A. and Augustinus, A. and Averbeck, R. and Awes, T. C. and Aysto, J. and Azmi, M. D. and Bablok, S. and Bach, M. and Badalia, A. and Baek, Y. W. and Bagnasco, S. and Bailhache, R. and Bala, R. and Baldisseri, A. and Baldit, A. and Ban, J. and Barbera, R. and Barnafoldi, G. G. and Barnby, L. and Barret, V. and Bartke, J. and Barile, F. and Basile, M. and Basmanov, V. and Bastid, N. and Bathen, B. and Batigne, G. and Batyunya, B. and Baumann, C. and Bearden, I. G. and Becker, B. and Belikov, I. and Bellwied, R. and Belmont-Moreno, E. and Belogianni, A. and Benhabib, L. and Beole, S. and Berceanu, I. and Bercuci, A. and Berdermann, E. and Berdnikov, Y. and Betev, L. and Bhasin, A. and Bhati, A. K. and Bianchi, L. and Bianchi, N. and Bianchin, C. and Bielik, J. and Bielikova, J. and Bilandzic, A. and Bimbot, L. and Biolcati, E. and Blanc, A. and Blanco, F. and Blanco, F. and Blau, D. and Blume, C. and Boccioli, M. and Bock, N. and Bogdanov, A. and Boggild, H. and Bogolyubsky, M. and Bohm, J. and Boldizsar, L. and Bombara, M. and Bombonati, C. and Bondila, M. and Borel, H. and Borisov, A. and Bortolin, C. and Bose, S. and Bosisio, L. and Bossu, F. and Botje, M. and Bottger, S. and Bourdaud, G. and Boyer, B. and Braun, M. and Braun-Munzinger, P. and Bravina, L. and Bregant, M. and Breitner, T. and Bruckner, G. and Brun, R. and Bruna, E. and Bruno, G. E. and Budnikov, D. and Buesching, H. and Buncic, P. and Busch, O. and Buthelezi, Z. and Caffarri, D. and Cai, X. and Caines, H. and Camacho, E. and Camerini, P. and Campbell, M. and Canoa Roman, V. and Capitani, G. P. and Cara Romeo, G. and Carena, F. and Carena, W. and Carminati, F. and Diaz, A. Casanova and Caselle, M. and Castellanos, J. Castillo and Castillo Hernandez, J. F. and Catanescu, V. and Cattaruzza, E. and Cavicchioli, C. and Cerello, P. and Chambert, V. and Chang, B. and Chapeland, S. and Charpy, A. and Charvet, J. L. and Chattopadhyay, S. and Chattopadhyay, S. and Cherney, M. and Cheshkov, C. and Cheynis, B. and Chiavassa, E. and Barroso, V. Chibante and Chinellato, D. D. and Chochula, P. and Choi, K. and Chojnacki, M. and Christakoglou, P. and Christensen, C. H. and Christiansen, Peter and Chujo, T. and Chuman, F. and Cicalo, C. and Cifarelli, L. and Cindolo, F. and Cleymans, J. and Cobanoglu, O. and Coffin, J. -P. and Coli, S. and Colla, A. and Conesa Balbastre, G. and del Valle, Z. Conesa and Conner, E. S. and Constantin, P. and Contin, G. and Contreras, J. G. and Morales, Y. Corrales and Cormier, T. M. and Cortese, P. and Maldonado, I. Cortes and Cosentino, M. R. and Costa, F. and Cotallo, M. E. and Crescio, E. and Crochet, P. and Cuautle, E. and Cunqueiro, L. and Cussonneau, J. and Dainese, A. and Dalsgaard, H. H. and Danu, A. and Das, I. and Dash, A. and Dash, S. and Barros, G. O. V. de and Caro, A. De and de Cataldo, G. and de Cuveland, J. and Falco, A. De and Gaspari, M. De and de Groot, J. and Gruttola, D. De and Marco, N. De and Pasquale, S. De and Remigis, R. De and de Rooij, R. and de Vaux, G. and Delagrange, H. and Dellacasa, G. and Deloff, A. and Demanov, V. and Denes, E. and Deppman, A. and D'Erasmo, G. and Derkach, D. and Devaux, A. and Di Bari, D. and Di Giglio, C. and Di Liberto, S. and Di Mauro, A. and Di Nezza, P. and Dialinas, M. and Diaz, L. and Diaz, R. and Dietel, T. and Divi, R. and Djuvsland, O. and Dobretsov, V. and Dobrin, Alexandru and Dobrowolski, T. and Donigus, B. and Dominguez, I. and Don, D. M. M. and Dordic, O. and Dubey, A. K. and Dubuisson, J. and Ducroux, L. and Dupieux, P. and Dutta Majumdar, A. K. and Dutta Majumdar, M. 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W. and Hartig, M. and Harutyunyan, A. and Hasch, D. and Hasegan, D. and Hatzifotiadou, D. and Hayrapetyan, A. and Heide, M. and Heinz, M. and Helstrup, H. and Herghelegiu, A. and Hernandez, C. and Herrera Corral, G. and Herrmann, N. and Hetland, K. F. and Hicks, B. and Hiei, A. and Hille, P. T. and Hippolyte, B. and Horaguchi, T. and Hori, Y. and Hristov, P. and Hrivnacova, I. and Hu, S. and Huang, M. and Huber, S. and Humanic, T. J. and Hutter, D. and Hwang, D. S. and Ichou, R. and Ilkaev, R. and Ilkiv, I. and Inaba, M. and Innocenti, P. G. and Ippolitov, M. and Irfan, M. and Ivan, C. and Ivanov, A. and Ivanov, M. and Ivanov, V. and Iwasaki, T. and Jachokowski, A. and Jacobs, P. and Janurova, L. and Jangal, S. and Janik, R. and Jena, C. and Jena, S. and Jirden, L. and Jones, G. T. and Jones, P. G. and Jovanoviic, P. and Jung, H. and Jung, W. and Jusko, A. and Kaidalov, A. 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  issn         = {{1434-6044}},
  language     = {{eng}},
  number       = {{3-4}},
  pages        = {{345--354}},
  publisher    = {{Springer}},
  series       = {{European Physical Journal C. Particles and Fields}},
  title        = {{Charged-particle multiplicity measurement in proton-proton collisions at root s=7 TeV with ALICE at LHC}},
  url          = {{http://dx.doi.org/10.1140/epjc/s10052-010-1350-2}},
  doi          = {{10.1140/epjc/s10052-010-1350-2}},
  volume       = {{68}},
  year         = {{2010}},
}