Measurement of jet fragmentation into charged particles in pp and PbPb collisions at √s NN = 2.76 TeV
Entity
UAM. Departamento de Física TeóricaPublisher
Springer Verlag; SISSA 2012Date
2012-10-12Citation
10.1007/JHEP10(2012)087
Journal of High Energy Physics 2012.10 (2012): 087
ISSN
1126-6708 (print); 1029-8479 (online)DOI
10.1007/JHEP10(2012)087Editor's Version
http://dx.doi.org/10.1007/JHEP10(2012)087Subjects
Hadron-hadron scattering; FísicaNote
Journal of High Energy Physics 2012.10 (2012): 087 reproduced by permission of Scuola Internazionale Superiore di Studi Avanzati (SISSA)Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM
Rights
© SISSA 2012Abstract
Jet fragmentation in pp and PbPb collisions at a centre-of-mass energy of 2.76TeV per nucleon pair was studied using data collected with the CMS detector at the LHC. Fragmentation functions are constructed using charged-particle tracks with transverse momenta pT > 4 GeV/c for dijet events with a leading jet of pT > 100 GeV/c. The fragmentation functions in PbPb events are compared to those in pp data as a function of collision centrality, as well as dijet-pT imbalance. Special emphasis is placed on the most central PbPb events including dijets with unbalanced momentum, indicative of energy loss of the hard scattered parent partons. The fragmentation patterns for both the leading and subleading jets in PbPb collisions agree with those seen in pp data at 2.76TeV. The results provide evidence that, despite the large parton energy loss observed in PbPb collisions, the partition of the remaining momentum within the jet cone into high-pT particles is not strongly modified in comparison to that observed for jets in vacuum
Files in this item
Google Scholar:The CMS collaboration
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Chatrchyan, S.
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Albajar Molera, Carmen
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Codispoti, G.
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Fernández Trocóniz Acha, Jorge
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