Medium modification of the shape of small-radius jets in central Pb-Pb collisions at root s(NN)=2:76 TeV
文献类型：期刊论文
| 作者 | Acharya, S; Acosta, FT-; Adamova, D; Adler, A; Adolfsson, J; Aggarwal, MM; Aglieri Rinella, G; Agnello, M; Agrawal, N; Ahammed, Z |
| 刊名 | JOURNAL OF HIGH ENERGY PHYSICS
 |
| 出版日期 | 2018 |
| 期号 | 10页码:- |
| 关键词 | TRANSVERSE-MOMENTUM DEPENDENCE LHC |
| ISSN号 | 1029-8479 |
| DOI | 10.1007/JHEP10(2018)139 |
| 文献子类 | 期刊论文 |
| 英文摘要 | We present the measurement of a new set of jet shape observables for trackbased jets in central Pb-Pb collisions at p sNN = 2 : 76TeV. The set of jet shapes includes the fi rst radial moment or angularity, g; the momentum dispersion, pTD; and the di ff erence between the leading and sub-leading constituent track transverse momentum, LeSub. These observables provide complementary information on the jet fragmentation and can constrain di ff erent aspects of the theoretical description of jet-medium interactions. The jet shapes were measured for a small resolution parameter R = 0 : 2 and were fully corrected to particle level. The observed jet shape modi fi cations indicate that in-medium fragmentation is harder and more collimated than vacuum fragmentation as obtained by PYTHIA calculations, which were validated with the measurements of the jet shapes in proton-proton collisions at p s = 7TeV. The comparison of the measured distributions to templates for quark and gluon-initiated jets indicates that in-medium fragmentation resembles that of quark jets in vacuum. We further argue that the observed modi fi cations are not consistent with a totally coherent energy loss picture where the jet loses energy as a single colour charge, suggesting that the medium resolves the jet structure at the angular scales probed by our measurements ( R = 0 : 2). Furthermore, we observe that small-R jets can help to isolate purely energy loss e ff ects from other e ff ects that contribute to the modi fi cations of the jet shower in medium such as the correlated background or medium response. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/31028]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Nagasaki Inst Appl Sci, Nagasaki, Japan 2.Politecn Torino, Dipartimento DET, Turin, Italy 3.Moscow MV Lomonosov State Univ, DV Skobeltsyn Inst Nucl Phys, Moscow, Russia 4.Aligarh Muslim Univ, Dept Appl Phys, Aligarh, Uttar Pradesh, India 5.Univ Wroclaw, Inst Theoret Phys, Wroclaw, Poland 6.Yerevan Phys Inst Fdn, AI Alikhanyan Natl Sci Lab, Yerevan, Armenia 7.Natl Acad Sci Ukraine, Bogolyubov Inst Theoret Phys, Kiev, Ukraine 8.Bose Inst, Dept Phys, Kolkata, India 9.Bose Inst, CAPSS, Kolkata, India 10.Budker Inst Nucl Phys, Novosibirsk, Russia |
| 推荐引用方式 GB/T 7714 | Acharya, S,Acosta, FT-,Adamova, D,et al. Medium modification of the shape of small-radius jets in central Pb-Pb collisions at root s(NN)=2:76 TeV[J]. JOURNAL OF HIGH ENERGY PHYSICS,2018(10):-. |
| APA | Acharya, S.,Acosta, FT-.,Adamova, D.,Adler, A.,Adolfsson, J.,...&Zmeskal, J.(2018).Medium modification of the shape of small-radius jets in central Pb-Pb collisions at root s(NN)=2:76 TeV.JOURNAL OF HIGH ENERGY PHYSICS(10),-. |
| MLA | Acharya, S,et al."Medium modification of the shape of small-radius jets in central Pb-Pb collisions at root s(NN)=2:76 TeV".JOURNAL OF HIGH ENERGY PHYSICS .10(2018):-. |
入库方式： OAI收割
来源：上海应用物理研究所
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