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First proton-proton collisions at the LHC as observed with the ALICE detector: measurement of the charged-particle pseudorapidity density at root s=900 GeV
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SYSNO ASEP 0435890 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title First proton-proton collisions at the LHC as observed with the ALICE detector: measurement of the charged-particle pseudorapidity density at root s=900 GeV Author(s) Aamodt, K. (NO)
Adamová, Dagmar (UJF-V) RID, ORCID, SAI
Bielčík, J. (CZ)
Bielčíková, Jana (UJF-V) RID, ORCID, SAI
Kapitán, Jan (UJF-V)
Král, J. (CZ)
Krus, M. (CZ)
Kushpil, Svetlana (UJF-V) RID, ORCID, SAI
Kushpil, Vasilij (UJF-V) ORCID, SAI
Mareš, Jiří A. (FZU-D) RID, ORCID
Pachr, M. (CZ)
Petráček, V. (CZ)
Polák, Karel (FZU-D)
Pospíšil, V. (CZ)
Šmakal, R. (CZ)
Šumbera, Michal (UJF-V) RID, ORCID, SAI
Tlustý, D. (CZ)
Wagner, V. (CZ)
Závada, Petr (FZU-D) RID, ORCID
Zycháček, V. (CZ)Number of authors 1055 Source Title European Physical Journal C. - : Springer - ISSN 1434-6044
Roč. 65, 1-2 (2010), s. 111-125Number of pages 15 s. Publication form Print - P Language eng - English Country US - United States Keywords ALICE ; high energies ; hadrons Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders Subject RIV - cooperation Institute of Physics - Elementary Particles and High Energy Physics R&D Projects LA09013 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support FZU-D - RVO:68378271 ; UJF-V - RVO:61389005 UT WOS 000272912700006 DOI 10.1140/epjc/s10052-009-1227-4 Annotation On 23rd November 2009, during the early commissioning of the CERN Large Hadron Collider (LHC), two counter-rotating proton bunches were circulated for the first time concurrently in the machine, at the LHC injection energy of 450 GeV per beam. Although the proton intensity was very low, with only one pilot bunch per beam, and no systematic attempt was made to optimize the collision optics, all LHC experiments reported a number of collision candidates. In the ALICE experiment, the collision region was centred very well in both the longitudinal and transverse directions and 284 events were recorded in coincidence with the two passing proton bunches. The events were immediately reconstructed and analyzed both online and offline. We have used these events to measure the pseudorapidity density of charged primary particles in the central region. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2015
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