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Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018)最新文献

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Low-$p_{rm T}$ $e^+e^-$ pair production in Au+Au collisions at $sqrt{s_{rm NN}}$ = 200 GeV and U+U collisions at $sqrt{s_{rm NN}}$ = 193 GeV at STAR 在$sqrt{s_{rm NN}}$ = 200 GeV的Au+Au碰撞和$sqrt{s_{rm NN}}$ = 193 GeV的U+U碰撞的低-$p_{rm T}$ $e^+e^-$对产生
Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018) Pub Date : 2019-04-23 DOI: 10.22323/1.345.0189
Shuai Yang
{"title":"Low-$p_{rm T}$ $e^+e^-$ pair production in Au+Au collisions at $sqrt{s_{rm NN}}$ = 200 GeV and U+U collisions at $sqrt{s_{rm NN}}$ = 193 GeV at STAR","authors":"Shuai Yang","doi":"10.22323/1.345.0189","DOIUrl":"https://doi.org/10.22323/1.345.0189","url":null,"abstract":"","PeriodicalId":412392,"journal":{"name":"Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130667558","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}
引用次数: 0
Jet-medium interactions in QCD matter (theory) QCD物质中的射流-介质相互作用(理论)
Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018) Pub Date : 2019-03-24 DOI: 10.22323/1.345.0036
T. Luo
{"title":"Jet-medium interactions in QCD matter (theory)","authors":"T. Luo","doi":"10.22323/1.345.0036","DOIUrl":"https://doi.org/10.22323/1.345.0036","url":null,"abstract":"","PeriodicalId":412392,"journal":{"name":"Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018)","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128174531","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}
引用次数: 1
Charm baryon production in pp, p–Pb and Pb–Pb collisions with ALICE at the LHC 大型强子对撞机ALICE中pp, p-Pb和Pb-Pb碰撞的粲重子产生
Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018) Pub Date : 2019-02-28 DOI: 10.22323/1.345.0137
E. Meninno
{"title":"Charm baryon production in pp, p–Pb and Pb–Pb collisions with ALICE at the LHC","authors":"E. Meninno","doi":"10.22323/1.345.0137","DOIUrl":"https://doi.org/10.22323/1.345.0137","url":null,"abstract":"In this contribution, the latest ALICE results on charmed baryon production are presented. In particular the measurements of $Lambda_{c}^{+}$ baryon production in pp collisions at $sqrt{s}$ = 5.02 TeV and in p-Pb collisions at $sqrt{s_{NN}}$ = 5.02 TeV are shown and compared with previous measurements performed using pp and p-Pb data samples collected during LHC Run 1. At mid-rapidity charmed baryons are reconstructed via their hadronic decay and semileptonic decay channels, exploiting the high precision tracking, excellent vertexing and particle identification capabilities offered by the ALICE detector. The first measurement of lcp-baryon production in Pb-Pb collisions at $sqrt{s_{NN}}$ = 5.02 TeV is also shown. Results are compared with theoretical expectations.","PeriodicalId":412392,"journal":{"name":"Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126446261","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}
引用次数: 1
Constraining energy loss from high-pt azimuthal asymmetries 抑制高pt方位不对称造成的能量损失
Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018) Pub Date : 2019-02-20 DOI: 10.22323/1.345.0070
C. Andres, N. Armesto, H. Niemi, R. Paatelainen, C. Salgado
{"title":"Constraining energy loss from high-pt azimuthal asymmetries","authors":"C. Andres, N. Armesto, H. Niemi, R. Paatelainen, C. Salgado","doi":"10.22323/1.345.0070","DOIUrl":"https://doi.org/10.22323/1.345.0070","url":null,"abstract":"The nuclear modification factor $R_{rm AA}$ has been satisfactorily described by various jet quenching models. Nonetheless, all these formalisms, until very recently, underpredicted the high-$p_{rm T}$ (> 10 GeV) elliptic flow $v_2$. We find that the simultaneous description of these observables requires to strongly suppress the quenching for the first $sim 0.6$ fm after the collision. This shows the potential of jet quenching observables to constrain the dynamics of the initial stages of the evolution.","PeriodicalId":412392,"journal":{"name":"Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129338017","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}
引用次数: 0
Ultra-peripheral-collision studies in the fixed-target mode with the proton and lead LHC beams 质子和铅强子对撞机固定目标模式下的超外围碰撞研究
Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018) Pub Date : 2019-02-18 DOI: 10.22323/1.345.0184
N. Yamanaka, C. Hadjidakis, D. Kikoła, J. Lansberg, L. Massacrier, M. Echevarria, A. Kusina, I. Schienbein, J. Seixas, H. Shao, A. Signori, B. Trzeciak, S. Brodsky, G. Cavoto, C. Silva, F. Donato, E. Ferreiro, I. Hrivnácová, A. Klein, A. Kurepin, C. Lorcé, F. Lyonnet, Y. Makdisi, S. Porteboeuf, C. Quintans, A. Rakotozafindrabe, P. Robbe, W. Scandale, N. Topilskaya, A. Uras, J. Wagner, Z. Yang, A. Zelenski
{"title":"Ultra-peripheral-collision studies in the fixed-target mode with the proton and lead LHC beams","authors":"N. Yamanaka, C. Hadjidakis, D. Kikoła, J. Lansberg, L. Massacrier, M. Echevarria, A. Kusina, I. Schienbein, J. Seixas, H. Shao, A. Signori, B. Trzeciak, S. Brodsky, G. Cavoto, C. Silva, F. Donato, E. Ferreiro, I. Hrivnácová, A. Klein, A. Kurepin, C. Lorcé, F. Lyonnet, Y. Makdisi, S. Porteboeuf, C. Quintans, A. Rakotozafindrabe, P. Robbe, W. Scandale, N. Topilskaya, A. Uras, J. Wagner, Z. Yang, A. Zelenski","doi":"10.22323/1.345.0184","DOIUrl":"https://doi.org/10.22323/1.345.0184","url":null,"abstract":"We address the physics case related to the studies of ultra-peripheral pH, pPb, PbH, and PbPb collisions in the fixed-target mode at the LHC. In particular, we discuss how one can measure the gluon generalized parton distribution E_g(x,xi,t) in exclusive J/psi photoproduction with a transversely polarized hydrogen target.","PeriodicalId":412392,"journal":{"name":"Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130860855","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}
引用次数: 0
Event-plane dependent away-side jet-like correlation shape in Au+Au collisions at $sqrt{s_{rm NN}}$=200 GeV from STAR $sqrt{s_{rm NN}}$= 200gev时Au+Au碰撞中事件平面相关的远侧喷流相关形状
Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018) Pub Date : 2019-02-16 DOI: 10.22323/1.345.0083
Liang Zhang
{"title":"Event-plane dependent away-side jet-like correlation shape in Au+Au collisions at $sqrt{s_{rm NN}}$=200 GeV from STAR","authors":"Liang Zhang","doi":"10.22323/1.345.0083","DOIUrl":"https://doi.org/10.22323/1.345.0083","url":null,"abstract":"We employ a data-driven method to subtract the flow background of all harmonics by calculating the difference of the two-particle correlations between the close-region and far-region, determined depending on the pseudo-rapidity ($eta$) distance from the region where an enhanced recoil transverse momentum ($P_x$) from a high-$p_T$ trigger particle is selected. We analyze the correlation shape as a function of the trigger particle azimuthal angle relative to the event-plane (EP) reconstructed from the beam-beam counters (BBCs) which are displaced by several units in $eta$ from the mid-rapidity region. The large $eta$ gap can effectively eliminate the auto-correlation between trigger particles and EP. We correct for the relatively large resolution effect from the BBC EP determination via an unfolding procedure. The width of unfolded away-side jet-like correlation increases with longer path-length, which is an indication of jet-medium interactions.","PeriodicalId":412392,"journal":{"name":"Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121832238","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}
引用次数: 0
Measurements of inclusive, boson-tagged, and heavy quark flavor jet energy loss in PbPb collisions at $sqrt{s_{rm NN}}$ = 5.02 TeV with the CMS detector 在$sqrt{s_{rm NN}}$ = 5.02 TeV下，用CMS探测器测量包含、玻色子标记和重夸克味喷流的能量损失
Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018) Pub Date : 2019-02-15 DOI: 10.22323/1.345.0172
X. Wang
{"title":"Measurements of inclusive, boson-tagged, and heavy quark flavor jet energy loss in PbPb collisions at $sqrt{s_{rm NN}}$ = 5.02 TeV with the CMS detector","authors":"X. Wang","doi":"10.22323/1.345.0172","DOIUrl":"https://doi.org/10.22323/1.345.0172","url":null,"abstract":"","PeriodicalId":412392,"journal":{"name":"Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018)","volume":"2017 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127554640","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}
引用次数: 0
Multi-stage jet evolution through QGP using the JETSCAPE framework: inclusive jets, correlations and leading hadrons. 使用JETSCAPE框架通过QGP进行多阶段射流演化:包括射流、相关性和领先强子。
Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018) Pub Date : 2019-02-15 DOI: 10.22323/1.345.0072
C. Park, A. Angerami, S. Bass, S. Cao, J. Coleman, L. Cunqueiro, T. Dai, L. Du, H. Elfner, D. Everett, W. Fan, R. Fries, C. Gale, Y. He, U. Heinz, B. Jacak, P. Jacobs, S. Jeon, K. Kauder, W. Ke, E. Khalaj, M. Kordell, A. Kumar, T. Luo, A. Majumder, M. McNelis, C. Nattrass, D. Oliinychenko, D. Pablos, L. Pang, J. Paquet, J. Putschke, G. Roland, B. Schenke, L. Schwiebert, C. Shen, C. Sirimanna, R. Soltz, Y. Tachibana, G. Vujanovic, X. Wang, R. Wolpert, Y. Xu, Z. Yang
{"title":"Multi-stage jet evolution through QGP using the JETSCAPE framework: inclusive jets, correlations and leading hadrons.","authors":"C. Park, A. Angerami, S. Bass, S. Cao, J. Coleman, L. Cunqueiro, T. Dai, L. Du, H. Elfner, D. Everett, W. Fan, R. Fries, C. Gale, Y. He, U. Heinz, B. Jacak, P. Jacobs, S. Jeon, K. Kauder, W. Ke, E. Khalaj, M. Kordell, A. Kumar, T. Luo, A. Majumder, M. McNelis, C. Nattrass, D. Oliinychenko, D. Pablos, L. Pang, J. Paquet, J. Putschke, G. Roland, B. Schenke, L. Schwiebert, C. Shen, C. Sirimanna, R. Soltz, Y. Tachibana, G. Vujanovic, X. Wang, R. Wolpert, Y. Xu, Z. Yang","doi":"10.22323/1.345.0072","DOIUrl":"https://doi.org/10.22323/1.345.0072","url":null,"abstract":"The JETSCAPE Collaboration has recently announced the first release of the JETSCAPE package that provides a modular, flexible, and extensible Monte Carlo event generator. This innovative framework makes it possible to perform a comprehensive study of multi-stage high-energy jet evolution in the Quark-Gluon Plasma. In this work, we illustrate the performance of the event generator for different algorithmic approaches to jet energy loss, and reproduce the measurements of several jet and hadron observables as well as correlations between the hard and soft sector. We also carry out direct comparisons between different approaches to energy loss to study their sensitivity to those observables.","PeriodicalId":412392,"journal":{"name":"Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125722310","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}
引用次数: 6
Production of open charm and beauty states in pPb collisions with LHCb pPb与LHCb碰撞中开放魅力态和美态的产生
Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018) Pub Date : 2019-02-11 DOI: 10.22323/1.345.0159
Yanxi Zhang
{"title":"Production of open charm and beauty states in pPb collisions with LHCb","authors":"Yanxi Zhang","doi":"10.22323/1.345.0159","DOIUrl":"https://doi.org/10.22323/1.345.0159","url":null,"abstract":"These proceedings summarize the LHCb measurements of charm- and beauty-hadron production in pPb collisions. The studies are made down to very low-pt of the observed heavy-flavor hadrons using fully reconstructed decays. Nuclear matter effects are quantified via nuclear modification factors and forward-backward production ratios. A strong suppression is observed at positive rapidity (proton beam direction), while a modest or no suppression is seen for the backward rapidity (lead beam direction). The nuclear parton distributions of the lead nucleus is constrained down to Bjorken-$xsim10^{-5}$, assuming it is the only nuclear effect for open heavy-flavor production. These data provide important inputs to understand the Quark-Gluon Plasma formed in heavy-nucleus collisions.","PeriodicalId":412392,"journal":{"name":"Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122492121","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}
引用次数: 2
Coherent J/$psi$ photo-production in Pb--Pb collisions with nuclear overlap, studied with ALICE at the LHC 具有核重叠的Pb—Pb碰撞的相干J/$psi$光产生，在大型强子对撞机上用ALICE研究
Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018) Pub Date : 2019-02-10 DOI: 10.22323/1.345.0181
L. Massacrier
{"title":"Coherent J/$psi$ photo-production in Pb--Pb collisions with nuclear overlap, studied with ALICE at the LHC","authors":"L. Massacrier","doi":"10.22323/1.345.0181","DOIUrl":"https://doi.org/10.22323/1.345.0181","url":null,"abstract":"The photoproduction of heavy vector mesons in the electromagnetic interactions of ultra-relativistic nuclei is thought to be sensitive to the gluon distributions in the nucleus and thus to cold nuclear effects like shadowing or gluon saturation. Besides the well known observations of vector meson production in ultra-peripheral collisions, first observations of an excess over the expected hadronic J/$psi$ production at very low transverse momentum ($p_T < $0.3 GeV/$c$) in peripheral and semi-central nucleus-nucleus collisions both at LHC and RHIC energies were interpreted as the first sign of coherent J/$psi$ photoproduction occurring in Pb-Pb collisions with nuclear overlap. The ALICE Collaboration published the J/$psi$ coherent photoproduction cross sections in peripheral and semi-central Pb-Pb collisions at $sqrt{s_{rm NN}}$ = 2.76 TeV and forward rapidity ($2.5<y<4.0$). Using the LHC Run-2 data, ALICE presents preliminary results in peripheral Pb-Pb collisions at $sqrt{s_{rm NN}}$ = 5.02 TeV at mid-rapidity ($|y|<0.9$) and forward rapidity. Thanks to the very good tracking resolution of the central barrel, the extraction of the $p_T$-differential cross section was also possible, strengthening the photoproduction origin of the observed J/$psi$ excess. The quantitative understanding of this low-$p_T$ excess poses significant theoretical challenges since the J/$psi$ photoproduction depends on the collision dynamics as well as on the photon-flux and the photonuclear cross section. In this proceeding, we present the latest ALICE measurements on J/$psi$ photoproduction cross section in peripheral Pb-Pb collisions, with emphasis on the new forward measurement in the dimuon decay channel at $sqrt{s_{rm NN}}$ = 5.02 TeV. These results will be discussed and compared to several model calculations of J/$psi$ photoproduction in Pb-Pb collisions with nuclear overlap.","PeriodicalId":412392,"journal":{"name":"Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2018)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117018247","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}
引用次数: 1
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