Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
First measurement of large area jet transverse momentum spectra in heavy-ion collisions. / The CMS collaboration.
в: Journal of High Energy Physics, Том 2021, № 5, 284, 05.2021.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - First measurement of large area jet transverse momentum spectra in heavy-ion collisions
AU - The CMS collaboration
AU - Sirunyan, A. M.
AU - Tumasyan, A.
AU - Adam, W.
AU - Ambrogi, F.
AU - Bergauer, T.
AU - Dragicevic, M.
AU - Erö, J.
AU - Escalante Del Valle, A.
AU - Flechl, M.
AU - Frühwirth, R.
AU - Jeitler, M.
AU - Krammer, N.
AU - Krätschmer, I.
AU - Liko, D.
AU - Madlener, T.
AU - Mikulec, I.
AU - Rad, N.
AU - Schieck, J.
AU - Schöfbeck, R.
AU - Spanring, M.
AU - Waltenberger, W.
AU - Wulz, C. E.
AU - Zarucki, M.
AU - Drugakov, V.
AU - Mossolov, V.
AU - Suarez Gonzalez, J.
AU - Darwish, M. R.
AU - De Wolf, E. A.
AU - Di Croce, D.
AU - Janssen, X.
AU - Kello, T.
AU - Lelek, A.
AU - Pieters, M.
AU - Rejeb Sfar, H.
AU - Van Haevermaet, H.
AU - Van Mechelen, P.
AU - Van Putte, S.
AU - Van Remortel, N.
AU - Blekman, F.
AU - Bols, E. S.
AU - Chhibra, S. S.
AU - D’Hondt, J.
AU - De Clercq, J.
AU - Lontkovskyi, D.
AU - Lowette, S.
AU - Barnyakov, A.
AU - Blinov, V.
AU - Dimova, T.
AU - Kardapoltsev, L.
AU - Skovpen, Y.
N1 - Funding Information: This study is supported in part by NIH grants R01CA70896, R01CA75503, R01CA86072, R01CA137494 and R01CA132115 and National Natural Science Foundation of China 81272418. We are grateful to Elsa R Flores, Ph.D. (Department of Biochemistry and Molecular Biology, Division of Basic Science Research, The University of Texas MD Anderson Cancer Center) for her helpful advice and suggestions. Publisher Copyright: © 2021, The Author(s).
PY - 2021/5
Y1 - 2021/5
N2 - 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.
AB - 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.
KW - Hadron-Hadron scattering (experiments)
KW - Heavy-ion collision
KW - Jets
UR - http://www.scopus.com/inward/record.url?scp=85107771526&partnerID=8YFLogxK
U2 - 10.1007/JHEP05(2021)284
DO - 10.1007/JHEP05(2021)284
M3 - Article
AN - SCOPUS:85107771526
VL - 2021
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
SN - 1029-8479
IS - 5
M1 - 284
ER -
ID: 28877390