Pub Date : 2006-01-30DOI: 10.1556/APH.27.2006.4.12
T. Novak
Bose-Einstein correlations of identical charged-pion pairs produced in hadronic Z decays are analyzed in terms of various parametrizations. A good description is achieved using Levy stable distributions. The source function is reconstructed with the help of the τ model.
{"title":"Shortest Movie from Bose-Einstein Correlation Functions in e + e - Annihilations","authors":"T. Novak","doi":"10.1556/APH.27.2006.4.12","DOIUrl":"https://doi.org/10.1556/APH.27.2006.4.12","url":null,"abstract":"Bose-Einstein correlations of identical charged-pion pairs produced in hadronic Z decays are analyzed in terms of various parametrizations. A good description is achieved using Levy stable distributions. The source function is reconstructed with the help of the τ model.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129754554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-11-28DOI: 10.1556/APH.27.2006.2-3.8
M. McCumber, J. Frantz
As in previous analyses at √s NN =200 GeV., correlations in azimuthal angles between inclusive charge particles at intermediate transverse momentum (p T=1.0−4.0) GeV are studied at √s NN =62.4 GeV. The di-jet correlations reveal similar modification as in 200 GeV. Specifically large modification, including the “volcano” or “cone” structure, persists in the awayside correlation.
如在前面的分析√s NN =200 GeV。，研究了在中间横动量(p T=1.0 ~ 4.0) GeV下，包荷粒子之间方位角的相关性。双喷流相关性显示了与200gev类似的变化。特别大的变化，包括“火山”或“锥”结构，在远端相关性中持续存在。
{"title":"Return of the volcano: PHENIX azimuthal correlations 62.4 GeV Au+Au","authors":"M. McCumber, J. Frantz","doi":"10.1556/APH.27.2006.2-3.8","DOIUrl":"https://doi.org/10.1556/APH.27.2006.2-3.8","url":null,"abstract":"As in previous analyses at √s NN =200 GeV., correlations in azimuthal angles between inclusive charge particles at intermediate transverse momentum (p T=1.0−4.0) GeV are studied at √s NN =62.4 GeV. The di-jet correlations reveal similar modification as in 200 GeV. Specifically large modification, including the “volcano” or “cone” structure, persists in the awayside correlation.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121849432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-11-21DOI: 10.1556/APH.27.2006.2-3.10
W. Horowitz
We present a new plot for representing R AA(o) data that emphasizes the strong correlation between high-p η suppression and its elliptic anisotropy. We demonstrate that existing models cannot reproduce the centrality dependence of this correlation. Modification of a geometric energy loss model to include thermal absorption and stimulated emission can match the trend of the data, but requires dN g/dy values inconsistent with the observed multiplicity. By including a small, outward-normal directed surface impulse opposing energy loss, (Delta p_ bot hat n), one can account for the centrality dependence of the observed Au+Au elliptic quench pattern. We also present predictions for Cu+Cu reactions.
我们提出了一个新的表示R AA(o)数据的图，强调了高p η抑制与其椭圆各向异性之间的强相关性。我们证明，现有的模型不能再现这种相关性的中心性依赖。修正几何能量损失模型，使其包括热吸收和受激发辐射，可以匹配数据的趋势，但要求dN g/dy值与观测到的多重性不一致。通过包括一个小的，向外法线定向表面脉冲反对能量损失，(Delta p_ bot hat n)，人们可以解释的中心性依赖观察到的Au+Au椭圆猝灭模式。我们也提出了Cu+Cu反应的预测。
{"title":"Large observed v(2) as a signature for deconfinement","authors":"W. Horowitz","doi":"10.1556/APH.27.2006.2-3.10","DOIUrl":"https://doi.org/10.1556/APH.27.2006.2-3.10","url":null,"abstract":"We present a new plot for representing R AA(o) data that emphasizes the strong correlation between high-p η suppression and its elliptic anisotropy. We demonstrate that existing models cannot reproduce the centrality dependence of this correlation. Modification of a geometric energy loss model to include thermal absorption and stimulated emission can match the trend of the data, but requires dN g/dy values inconsistent with the observed multiplicity. By including a small, outward-normal directed surface impulse opposing energy loss, (Delta p_ bot hat n), one can account for the centrality dependence of the observed Au+Au elliptic quench pattern. We also present predictions for Cu+Cu reactions.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125728879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-11-19DOI: 10.1556/APH.27.2006.2-3.23
I. Vitev
We present an analytic model of jet quenching, based on the (D)GLV energy loss formalism, to describe the system size dependence of QGP-induced parton absorption in relativistic heavy ion collisions. Numerical simulations of the transverse momentum dependence of jet quenching are given for central Au+Au and Cu+Cu reactions. Low p Tdijet correlations are shown to be sensitive to the reappearance of the lost energy as soft hadrons. At high p Twe find that the attenuation of dihadrons is similar to that of single inclusive particles. Comparison to recent data from PHENIX and STAR is given as a test of the jet quenching theory.
{"title":"Testing the mechanism of QGP-induced energy loss","authors":"I. Vitev","doi":"10.1556/APH.27.2006.2-3.23","DOIUrl":"https://doi.org/10.1556/APH.27.2006.2-3.23","url":null,"abstract":"We present an analytic model of jet quenching, based on the (D)GLV energy loss formalism, to describe the system size dependence of QGP-induced parton absorption in relativistic heavy ion collisions. Numerical simulations of the transverse momentum dependence of jet quenching are given for central Au+Au and Cu+Cu reactions. Low p Tdijet correlations are shown to be sensitive to the reappearance of the lost energy as soft hadrons. At high p Twe find that the attenuation of dihadrons is similar to that of single inclusive particles. Comparison to recent data from PHENIX and STAR is given as a test of the jet quenching theory.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134101882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-11-19DOI: 10.1556/APH.27.2006.2-3.21
Edward A. Wenger
The PHOBOS Collaboration has measured transverse momentum distributions of charged hadrons produced in Cu+Cu collisions at √sNN=200 and 62.4 GeV. The nuclear modification factor RAANpart is calculated relative to p+p data at both collision energies as a function of collision centrality. For the same number of participating nucleons, RAANpart is essentially the same in both systems over the full range of pTthat is measured. In addition, we observe that within experimental uncertainties, the ratio of 200 GeV to 62.4 GeV Cu+Cu yields has only a moderate centrality dependence and is consistent with the value previously measured in Au+Au collisions for a broad range of pT.
{"title":"Energy and System Size Dependence of Charged Hadron Transverse Momentum Spectra from Cu+Cu and Au+Au Collisions at √ s NN = 62.4 and 200 GeV","authors":"Edward A. Wenger","doi":"10.1556/APH.27.2006.2-3.21","DOIUrl":"https://doi.org/10.1556/APH.27.2006.2-3.21","url":null,"abstract":"The PHOBOS Collaboration has measured transverse momentum distributions of charged hadrons produced in Cu+Cu collisions at √sNN=200 and 62.4 GeV. The nuclear modification factor RAANpart is calculated relative to p+p data at both collision energies as a function of collision centrality. For the same number of participating nucleons, RAANpart is essentially the same in both systems over the full range of pTthat is measured. In addition, we observe that within experimental uncertainties, the ratio of 200 GeV to 62.4 GeV Cu+Cu yields has only a moderate centrality dependence and is consistent with the value previously measured in Au+Au collisions for a broad range of pT.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128700101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-11-18DOI: 10.1556/APH.27.2006.2-3.45
T. Tatsumi, E. Nakano
Taking into account pseudoscalar as well as scalar condensates, we reexamine the chiral restoration path on the chiral manifold. We shall see both condensates coherently produce a density wave at a certain density, which delays chiral restoration as density or temperature is increased.
{"title":"How is chiral symmetry restored at finite density","authors":"T. Tatsumi, E. Nakano","doi":"10.1556/APH.27.2006.2-3.45","DOIUrl":"https://doi.org/10.1556/APH.27.2006.2-3.45","url":null,"abstract":"Taking into account pseudoscalar as well as scalar condensates, we reexamine the chiral restoration path on the chiral manifold. We shall see both condensates coherently produce a density wave at a certain density, which delays chiral restoration as density or temperature is increased.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122427780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-11-18DOI: 10.1556/aph.27.2006.2-3.22
I. Vitev, T. Goldman, Mikkel B. Johnson, J. Qiu
We calculate and resum the nuclear enhanced power corrections from the final state partonic scattering in nuclear matter to open charm production and correlations. In p+A reactions, we find that single and double inclusive D mesons can be suppressed as much as the neutral pions from the dynamical high twist shadowing. Effects of initial state energy loss in p+A collisions are also investigated and may lead to significantly weaker transverse momentum dependence of the nuclear suppression.
{"title":"Nuclear effects on open charm production in p+A reactions","authors":"I. Vitev, T. Goldman, Mikkel B. Johnson, J. Qiu","doi":"10.1556/aph.27.2006.2-3.22","DOIUrl":"https://doi.org/10.1556/aph.27.2006.2-3.22","url":null,"abstract":"We calculate and resum the nuclear enhanced power corrections from the final state partonic scattering in nuclear matter to open charm production and correlations. In p+A reactions, we find that single and double inclusive D mesons can be suppressed as much as the neutral pions from the dynamical high twist shadowing. Effects of initial state energy loss in p+A collisions are also investigated and may lead to significantly weaker transverse momentum dependence of the nuclear suppression.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"54 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120909260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-11-17DOI: 10.1556/APH.27.2006.2-3.4
N. Ajitanand
Modifications of jet properties resulting from the coupling of jets to the strongly interacting matter produced in RHIC collisions are of great current interest. In recent work, the PHENIX collaboration has applied a novel technique to the analysis of two-particle azimuthal correlations which extinguishes the harmonic part of the underlying event revealing the true jet shape. Recent extensions of the method to three-particle correlations allow for a more revealing study of jet topologies in Au+Au collisions at (√s NN=200 GeV).
{"title":"Identification of exotic jet topologies via three-particle correlations in PHENIX","authors":"N. Ajitanand","doi":"10.1556/APH.27.2006.2-3.4","DOIUrl":"https://doi.org/10.1556/APH.27.2006.2-3.4","url":null,"abstract":"Modifications of jet properties resulting from the coupling of jets to the strongly interacting matter produced in RHIC collisions are of great current interest. In recent work, the PHENIX collaboration has applied a novel technique to the analysis of two-particle azimuthal correlations which extinguishes the harmonic part of the underlying event revealing the true jet shape. Recent extensions of the method to three-particle correlations allow for a more revealing study of jet topologies in Au+Au collisions at (√s\u0000 NN=200 GeV).","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123711815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-11-17DOI: 10.1556/APH.27.2006.2-3.13
Jiamin Jin
This poster presents the PHENIX results on high-p Tγ-hadron and π0-hadron correlations and shows the modification of away side jet shape by the medium. By comparing their jet shapes and yields, we see some evidence of the direct γ contribution to correlation functions.
这张海报介绍了高p t - γ-强子和π - 0-强子相关的PHENIX结果，并展示了介质对远侧射流形状的改变。通过比较它们的射流形状和产率，我们看到了γ对相关函数直接贡献的一些证据。
{"title":"High- p T γ-hadron and π 0 -hadron correlations in √ s NN =200 GeV Au+Au collisions in PHENIX","authors":"Jiamin Jin","doi":"10.1556/APH.27.2006.2-3.13","DOIUrl":"https://doi.org/10.1556/APH.27.2006.2-3.13","url":null,"abstract":"This poster presents the PHENIX results on high-p\u0000 Tγ-hadron and π0-hadron correlations and shows the modification of away side jet shape by the medium. By comparing their jet shapes and yields, we see some evidence of the direct γ contribution to correlation functions.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127025263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-11-17DOI: 10.1556/APH.27.2006.2-3.28
J. Noronha, H. Ren, I. Giannakis, D. Hou, D. Rischke
Type-I color superconductors display a first-order phase transition due to thermal gauge-field fluctuations. We numerically evaluated the critical temperature of the first-order phase transition and the corresponding discontinuity of the diquark condensate at the critical point.
{"title":"Effect of gauge-field fluctuations on the phase transition between normal and color-superconducting quark matter","authors":"J. Noronha, H. Ren, I. Giannakis, D. Hou, D. Rischke","doi":"10.1556/APH.27.2006.2-3.28","DOIUrl":"https://doi.org/10.1556/APH.27.2006.2-3.28","url":null,"abstract":"Type-I color superconductors display a first-order phase transition due to thermal gauge-field fluctuations. We numerically evaluated the critical temperature of the first-order phase transition and the corresponding discontinuity of the diquark condensate at the critical point.","PeriodicalId":201208,"journal":{"name":"Acta Physica Hungarica A) Heavy Ion Physics","volume":"24 11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133568848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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