期刊文献+
共找到6篇文章
< 1 >
每页显示 20 50 100
Sensitivity of Pion versus Parton-Jet Nuclear Modification Factors to the Path-Length Dependence of Jet-Energy Loss at RHIC and LHC
1
作者 Barbara Betz Miklos Gyulassy 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第12期30-34,共5页
We compare the jet-path length and beam-energy dependence of the pion nuclear modification factor and a patton-jet nuclear modification factor at RHIC and LHC, and contrast the predictions based on a linear pQCD and a... We compare the jet-path length and beam-energy dependence of the pion nuclear modification factor and a patton-jet nuclear modification factor at RHIC and LHC, and contrast the predictions based on a linear pQCD and a highly non-linear hybrid AdS holographic model of jet-energy loss. It is found that both models require a reduction of the jet-medium coupling from RHIC to LHC to account for the measured pion nuclear modification factor. In the case of the parton-jet nuclear modification factor, however, which serves as a lower bound for the LO jet nuclear modification factor of reconstructed jets, the extracted data can be characterized without a reduced jet-medium coupling at LHC energies. It is concluded that when the reconstructed jets are sensitive to both quarks and gluons and thus provide more information than the pion nuclear modification factor, their information regarding the jet-medium coupling is limited due to the superposition with NLO and medium effects. Hence, a detailed description of the underlying physics requires both the leading hadron and the reconstructed jet nuclear modification factor. Unfortunately, the results for both the pion and the parton-jet nuclear modification factor are insensitive to the jet-path dependence of the models considered. 展开更多
关键词 LHC Sensitivity of Pion versus Parton-Jet nuclear modification factors to the Path-Length Dependence of Jet-Energy Loss at RHIC and LHC
下载PDF
Nuclear modification factor for J/ψ production in nucleus-nucleus collisions
2
作者 许晓明 周杰 《Chinese Physics C》 SCIE CAS CSCD 2011年第5期463-466,共4页
The STAR Collaboration has offered an eminent nuclear modification factor of J/ψ at high p T and midrapidity produced in Cu-Cu collisions at sNN^(1/2) = 200 GeV. Recalling a prediction, we can understand that the f... The STAR Collaboration has offered an eminent nuclear modification factor of J/ψ at high p T and midrapidity produced in Cu-Cu collisions at sNN^(1/2) = 200 GeV. Recalling a prediction, we can understand that the feature of high-pT nuclear modification factor is related to cc produced by 2 → 1 and 2 → 2 partonic processes in deconfined matter, particularly in the prethermal stage and to the recombination of c and c. The nuclear modification factor at high p T is sensitive to the earliest form of deconfined matter that does not have a temperature. 展开更多
关键词 nuclear modification factor prethermal stage recombination mechanism
原文传递
Study on open charm hadron production and angular correlation in high-energy nuclear collisions 被引量:7
3
作者 Hai Wang Jin-Hui Chen 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2021年第1期10-16,共7页
We study the production and angular correlationof charm hadrons in hot and dense matter produced in high-energy nuclear-nuclear collisions within a multiphasetransport model(AMPT).By triggering additional charm-antich... We study the production and angular correlationof charm hadrons in hot and dense matter produced in high-energy nuclear-nuclear collisions within a multiphasetransport model(AMPT).By triggering additional charm-anticharm quark pair production in the AMPT,the modeldescribes the D^0 nuclear modification factor in the low andintermediate pr regions in Au+Au collisions at√VSNN=200 GeV reasonably well.Further exploration of the D^0 pair azimuthal angular correlation for different centralitiesshows clear evolution from low-multiplicity to high-mul-tiplicity events,which is associated with the number ofcharm quark interactions with medium partons duringAMPT transport. 展开更多
关键词 Heavy-ion collision Heavy flavor nuclear modification factor Two-particle correlations
下载PDF
Jet production at next-to-leading order in p+Au collisions at the RHIC
4
作者 何云存 张本威 王恩科 《Chinese Physics C》 SCIE CAS CSCD 2012年第11期1077-1081,共5页
We calculate jet productions in p+Au collisions at the RHIC at next-to-leading order with perturbative QCD. Inclusive jet transverse energy spectrum, dijet invariant mass spectrum, dijet angular distribution, and cor... We calculate jet productions in p+Au collisions at the RHIC at next-to-leading order with perturbative QCD. Inclusive jet transverse energy spectrum, dijet invariant mass spectrum, dijet angular distribution, and corresponding nuclear modification factors for the three observables in p+Au collisions at √s=200 GeV are given, where the initial-state cold nuclear matter (CNM) effects are included by taking advantage of four parametrization sets of nuclear parton distribution functions (nPDFs) - EPS, nCTEQ, HKN and DS. We demonstrate that inclusive jet transverse energy (ET) spectrum, dijet invariant mass (MJJ) spectrum with all 4 nPDFs are increased at low ET or MJJ, whereas at high ET or MJJ large deviation of results with different nPDFs is observed. It is found that the dijet angular distributions in p+Au collisions do not vary relative to those in p+p collisions for all 4 nPDFs. 展开更多
关键词 full jet CNM effects parametrization sets nuclear modification factor
原文传递
Centrality dependence of pT spectra for identified hadrons in Au+Au and Cu+Cu collisions at (~SNN)^(1/2)=200 GeV
5
作者 王云飞 邵凤兰 +2 位作者 宋军 魏德明 谢去病 《Chinese Physics C》 SCIE CAS CSCD 北大核心 2008年第12期976-983,共8页
The centrality dependence of transverse momentum spectra for identified hadrons at midrapidityin Au+Au collisions at √sNN=200GeV is systematically studied in a quark combination model. The PTspectra of π^±, K^... The centrality dependence of transverse momentum spectra for identified hadrons at midrapidityin Au+Au collisions at √sNN=200GeV is systematically studied in a quark combination model. The PTspectra of π^±, K^±, p(p) and A(A) in different centrality bins and the nuclear modification factors (Rcp) forthese hadrons are calculated. The centrality dependence of the average collective transverse velocity (β (r)) for the hot and dense quark matter is obtained in Au+Au collisions, and it is applied to a relative smallerCu+Cu collision system. The centrality dependence of PT spectra and the Rcp for π^0, Ks^0 and A in Cu-bCucollisions at √sNN = 200 GeV are well described. The results show that (β (r)〉is only a function of the numberof participants Npart and it is independent of the collision system. 展开更多
关键词 relativistic high energy nucleus-nucleus collisions nuclear modification factor transverse collective flow quark combination model
原文传递
Study of K^(*)(892)^(0)andФ(1020)meson production in proton–proton and Pb–Pb collisions at√S_(NN)=2.76 TeV
6
作者 Y Ali M Ahmed +4 位作者 A Arif Q Ali U Tabassam U Rubab M Suleymanov 《Communications in Theoretical Physics》 SCIE CAS CSCD 2021年第2期89-95,共7页
In this paper,we describe a study of charged particle yield as a function of pT for K^(*)(892)0 and phgr(1020)mesons in proton–proton(pp)and Pb–Pb collisions at√S_(NN)=2.76 TeV in the central rapidity region of|y|&... In this paper,we describe a study of charged particle yield as a function of pT for K^(*)(892)0 and phgr(1020)mesons in proton–proton(pp)and Pb–Pb collisions at√S_(NN)=2.76 TeV in the central rapidity region of|y|<0.5,in a pT range of 0<pT<15 GeV c^(−1)in pp collisions and in a pT range of 0<pT<20 GeV c−1 in Pb-Pb collisions.We also investigated a very important ratio,the nuclear modification factor,to study the effects of the medium in the most central region,i.e.0%–5%centrality.For data simulation,we used the EPOS-LHC and EPOS-1.99 models.To check the validity of these models'simulations,we compared the data obtained from these Monte Carlo simulation programs with ALICE experimental data for√S_(NN)=2.76 TeV.It was concluded that the models'predictions for the phgr-meson in pp and for the most central Pb-Pb collisions disagreed with the ALICE data,and that the difference increased with pT.This may be connected with the essential role of collective parton behaviors which could not have been taken into account by the models.For K^(*)0 mesons,both programs gave almost the same predictions,and with pT in the interval pT>3 GeV c^(−1),the predictions were very close to the experimental data.Both models gave higher predictions for the soft pT interval and lower predictions for the hard interactions.The values of the RAA distributions were lower than unity and both models were very close to the ALICE data.It is very interesting that the models were not able to describe the pT distributions,but they gave good predictions for their ratios.This may possibly be due to parton collective behaviors.We observed some additional suppression of K^(*)0 at low values of pT with respect to phgr-mesons,which may be related to the role of the masses of the particles in soft interactions.The rising trend for R_(AA)in the region from pT=10 GeV c^(−1)to 20 GeV c^(−1) observed by the ALICE experiment was absent for theФ-mesons. 展开更多
关键词 Quark Gluon Plasma EPOS-LHC nuclear modification factor
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部