Modification of jet shapes in PbPb collisions at sNN=2.76TeV
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, cilt.730, ss.243-263, 2014 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 730
- Basım Tarihi: 2014
- Doi Numarası: 10.1016/j.physletb.2014.01.042
- Dergi Adı: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.243-263
- Anahtar Kelimeler: CMS, Heavy ion physics, Jet shapes
- Yıldız Teknik Üniversitesi Adresli: Evet
Özet
The first measurement of jet shapes, defined as the fractional transverse momentum radial distribution, for inclusive jets produced in heavy-ion collisions is presented. Data samples of PbPb and pp collisions, corresponding to integrated luminosities of 150 μb-1 and 5.3 pb-1 respectively, were collected at a nucleon-nucleon centre-of-mass energy of sNN=2.76TeV with the CMS detector at the LHC. The jets are reconstructed with the anti-kT algorithm with a distance parameter R = 0.3, and the jet shapes are measured for charged particles with transverse momentum pT > 1GeV/c. The jet shapes measured in PbPb collisions in different collision centralities are compared to reference distributions based on the pp data. A centrality-dependent modification of the jet shapes is observed in the more central PbPb collisions, indicating a redistribution of the energy inside the jet cone. This measurement provides information about the parton shower mechanism in the hot and dense medium produced in heavy-ion collisions. © 2014 The Authors.