Charged-particle multiplicity measurement in proton-proton collisions at root s=0.9 and 2.36 TeV with ALICE at LHC
(2010) In European Physical Journal C. Particles and Fields 68(1-2). p.89-108- Abstract
- Charged-particle production was studied in proton-proton collisions collected at the LHC with the ALICE detector at centre-of-mass energies 0.9 TeV and 2.36 TeV in the pseudorapidity range vertical bar eta vertical bar < 1.4. In the central region (vertical bar eta vertical bar < 0.5), at 0.9 TeV, we measure charged-particle pseudo-rapidity density dN(ch)/d eta = 3.02 +/- 0.01(stat.)(-0.05)(+0.08)(syst.) for inelastic interactions, and dN(ch)/d eta = 3.58 +/- 0.01 (stat.)(-0.12)(+0.12)(syst.) for non-single-diffractive interactions. At 2.36 TeV, we find dN(ch)/d eta = 3.77 +/- 0.01(stat.)(-0.12)(+0.25)(syst.) for inelastic, and dN(ch)/d eta = 4.43 +/- 0.01(stat.)(-0.12)(+0.17)(syst.) for non-single-diffractive collisions. The... (More)
- Charged-particle production was studied in proton-proton collisions collected at the LHC with the ALICE detector at centre-of-mass energies 0.9 TeV and 2.36 TeV in the pseudorapidity range vertical bar eta vertical bar < 1.4. In the central region (vertical bar eta vertical bar < 0.5), at 0.9 TeV, we measure charged-particle pseudo-rapidity density dN(ch)/d eta = 3.02 +/- 0.01(stat.)(-0.05)(+0.08)(syst.) for inelastic interactions, and dN(ch)/d eta = 3.58 +/- 0.01 (stat.)(-0.12)(+0.12)(syst.) for non-single-diffractive interactions. At 2.36 TeV, we find dN(ch)/d eta = 3.77 +/- 0.01(stat.)(-0.12)(+0.25)(syst.) for inelastic, and dN(ch)/d eta = 4.43 +/- 0.01(stat.)(-0.12)(+0.17)(syst.) for non-single-diffractive collisions. The relative increase in charged-particle multiplicity from the lower to higher energy is 24.7% +/- 0.5%(stat.)(-2.8)(+5.7)%(syst.) for inelastic and 23.7% +/- 0.5%(stat.)(-1.1)(+4.6)%(syst.) for non-single-diffractive interactions. This increase is consistent with that reported by the CMS collaboration for non-single-diffractive events and larger than that found by a number of commonly used models. The multiplicity distribution was measured in different pseudorapidity intervals and studied in terms of KNO variables at both energies. The results are compared to proton-antiproton data and to model predictions. (Less)
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https://lup.lub.lu.se/record/1654976
- author
- organization
- publishing date
- 2010
- type
- Contribution to journal
- publication status
- published
- subject
- in
- European Physical Journal C. Particles and Fields
- volume
- 68
- issue
- 1-2
- pages
- 89 - 108
- publisher
- Springer
- external identifiers
-
- wos:000279843400003
- scopus:77954524072
- ISSN
- 1434-6044
- DOI
- 10.1140/epjc/s10052-010-1339-x
- language
- English
- LU publication?
- yes
- id
- 3ff9e355-8d07-4dfa-86e8-fe449190b683 (old id 1654976)
- date added to LUP
- 2016-04-01 13:01:47
- date last changed
- 2023-03-02 01:52:39
@article{3ff9e355-8d07-4dfa-86e8-fe449190b683, abstract = {{Charged-particle production was studied in proton-proton collisions collected at the LHC with the ALICE detector at centre-of-mass energies 0.9 TeV and 2.36 TeV in the pseudorapidity range vertical bar eta vertical bar < 1.4. In the central region (vertical bar eta vertical bar < 0.5), at 0.9 TeV, we measure charged-particle pseudo-rapidity density dN(ch)/d eta = 3.02 +/- 0.01(stat.)(-0.05)(+0.08)(syst.) for inelastic interactions, and dN(ch)/d eta = 3.58 +/- 0.01 (stat.)(-0.12)(+0.12)(syst.) for non-single-diffractive interactions. At 2.36 TeV, we find dN(ch)/d eta = 3.77 +/- 0.01(stat.)(-0.12)(+0.25)(syst.) for inelastic, and dN(ch)/d eta = 4.43 +/- 0.01(stat.)(-0.12)(+0.17)(syst.) for non-single-diffractive collisions. The relative increase in charged-particle multiplicity from the lower to higher energy is 24.7% +/- 0.5%(stat.)(-2.8)(+5.7)%(syst.) for inelastic and 23.7% +/- 0.5%(stat.)(-1.1)(+4.6)%(syst.) for non-single-diffractive interactions. This increase is consistent with that reported by the CMS collaboration for non-single-diffractive events and larger than that found by a number of commonly used models. The multiplicity distribution was measured in different pseudorapidity intervals and studied in terms of KNO variables at both energies. The results are compared to proton-antiproton data and to model predictions.}}, author = {{Aamodt, K. and Abel, N. and Abeysekara, U. and Quintana, A. Abrahantes and Abramyan, A. and Adamova, D. and Aggarwal, M. M. and Rinella, G. Aglieri and Agocs, A. G. and Salazar, S. Aguilar 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 Molina, R. Alfaro and Alici, A. and Almaraz Avina, 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 Appelshaeuser, 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 Badala, 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 Barnafoeldi, 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 Borshchov, V. 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. 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Particles and Fields}}, title = {{Charged-particle multiplicity measurement in proton-proton collisions at root s=0.9 and 2.36 TeV with ALICE at LHC}}, url = {{http://dx.doi.org/10.1140/epjc/s10052-010-1339-x}}, doi = {{10.1140/epjc/s10052-010-1339-x}}, volume = {{68}}, year = {{2010}}, }