First measurement of large area jet transverse momentum spectra in heavy-ion collisions

被引:0
作者
A. M. Sirunyan
A. Tumasyan
W. Adam
F. Ambrogi
T. Bergauer
M. Dragicevic
J. Erö
A. Escalante Del Valle
M. Flechl
R. Frühwirth
M. Jeitler
N. Krammer
I. Krätschmer
D. Liko
T. Madlener
I. Mikulec
N. Rad
J. Schieck
R. Schöfbeck
M. Spanring
W. Waltenberger
C.-E. Wulz
M. Zarucki
V. Drugakov
V. Mossolov
J. Suarez Gonzalez
M. R. Darwish
E. A. De Wolf
D. Di Croce
X. Janssen
T. Kello
A. Lelek
M. Pieters
H. Rejeb Sfar
H. Van Haevermaet
P. Van Mechelen
S. Van Putte
N. Van Remortel
F. Blekman
E. S. Bols
S. S. Chhibra
J. D’Hondt
J. De Clercq
D. Lontkovskyi
S. Lowette
I. Marchesini
S. Moortgat
Q. Python
S. Tavernier
W. Van Doninck
机构
[1] Yerevan Physics Institute,Institute for Nuclear Research and Nuclear Energy
[2] Institut für Hochenergiephysik,Department of Physics
[3] Institute for Nuclear Problems,State Key Laboratory of Nuclear Physics and Technology
[4] Universiteit Antwerpen,Academy of Scientific Research and Technology of the Arab Republic of Egypt
[5] Vrije Universiteit Brussel,Department of Physics
[6] Université Libre de Bruxelles,MTA
[7] Ghent University,ELTE Lendület CMS Particle and Nuclear Physics Group
[8] Université Catholique de Louvain,Institute of Physics
[9] Centro Brasileiro de Pesquisas Fisicas,National Centre for Particle Physics
[10] Universidade do Estado do Rio de Janeiro,National Centre for Physics
[11] Universidade Estadual Paulista,Institute of Experimental Physics, Faculty of Physics
[12] Universidade Federal do ABC,Skobeltsyn Institute of Nuclear Physics
[13] Bulgarian Academy of Sciences,Faculty of Physics
[14] University of Sofia,School of Physics and Astronomy
[15] Beihang University,undefined
[16] Tsinghua University,undefined
[17] Institute of High Energy Physics,undefined
[18] Peking University,undefined
[19] Zhejiang University,undefined
[20] Universidad de Los Andes,undefined
[21] Universidad de Antioquia,undefined
[22] University of Split,undefined
[23] Faculty of Electrical Engineering,undefined
[24] Mechanical Engineering and Naval Architecture,undefined
[25] University of Split,undefined
[26] Faculty of Science,undefined
[27] Institute Rudjer Boskovic,undefined
[28] University of Cyprus,undefined
[29] Charles University,undefined
[30] Escuela Politecnica Nacional,undefined
[31] Universidad San Francisco de Quito,undefined
[32] Egyptian Network of High Energy Physics,undefined
[33] National Institute of Chemical Physics and Biophysics,undefined
[34] University of Helsinki,undefined
[35] Helsinki Institute of Physics,undefined
[36] Lappeenranta University of Technology,undefined
[37] IRFU,undefined
[38] CEA,undefined
[39] Université Paris-Saclay,undefined
[40] Laboratoire Leprince-Ringuet,undefined
[41] CNRS/IN2P3,undefined
[42] Ecole Polytechnique,undefined
[43] Institut Polytechnique de Paris,undefined
[44] Université de Strasbourg,undefined
[45] CNRS,undefined
[46] IPHC UMR 7178,undefined
[47] Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules,undefined
[48] CNRS/IN2P3,undefined
[49] Université de Lyon,undefined
[50] Université Claude Bernard Lyon 1,undefined
来源
Journal of High Energy Physics | / 2021卷
关键词
Hadron-Hadron scattering (experiments); Heavy-ion collision; Jets;
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摘要
Jet production in lead-lead (PbPb) and proton-proton (pp) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV is studied with the CMS detector at the LHC, using PbPb and pp data samples corresponding to integrated luminosities of 404 μb−1 and 27.4 pb−1, respectively. Jets with different areas are reconstructed using the anti-kT algorithm by varying the distance parameter R. The measurements are performed using jets with transverse momenta (pT) greater than 200 GeV and in a pseudorapidity range of |η| < 2. To reveal the medium modification of the jet spectra in PbPb collisions, the properly normalized ratio of spectra from PbPb and pp data is used to extract jet nuclear modification factors as functions of the PbPb collision centrality, pT and, for the first time, as a function of R up to 1.0. For the most central collisions, a strong suppression is observed for high-pT jets reconstructed with all distance parameters, implying that a significant amount of jet energy is scattered to large angles. The dependence of jet suppression on R is expected to be sensitive to both the jet energy loss mechanism and the medium response, and so the data are compared to several modern event generators and analytic calculations. The models considered do not fully reproduce the data.
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