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Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020)最新文献

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Jet acoplanarity via hadron+jet measurements in Pb–Pbcollisions at√sNN=5.02 TeV with ALICE 用ALICE测量在√sNN=5.02 TeV下pb - pb碰撞中强子+喷流的共面性
Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020) Pub Date : 2021-09-01 DOI: 10.22323/1.387.0127
J. Norman
{"title":"Jet acoplanarity via hadron+jet measurements in Pb–Pbcollisions at√sNN=5.02 TeV with ALICE","authors":"J. Norman","doi":"10.22323/1.387.0127","DOIUrl":"https://doi.org/10.22323/1.387.0127","url":null,"abstract":"We present the first fully-corrected semi-inclusive distribution of charged jets recoiling from a trigger hadron in 0-10% Pb--Pb collisions at $sqrt{s_{mathrm{NN}}}$ = 5.02 TeV as a function of the azimuthal angle between the trigger hadron and jet, $Deltavarphi$. This technique provides a precise data-driven subtraction of the large uncorrelated background contaminating the measurement, and enables the exploration of jet acoplanarity. Results for $R=0.2$ recoil jets in the region $30 < {p}_{mathrm{T,jet}}^{mathrm{ch}} < 40~mathrm{GeV}/c$ are shown, where a suppression and narrowing of the $Deltavarphi$ distribution is observed in 0-10% Pb--Pb collisions with respect to a PYTHIA pp reference.","PeriodicalId":309796,"journal":{"name":"Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020)","volume":"179 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115458367","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
Open heavy-flavor production in pPb collisions at LHCb LHCb中pPb碰撞的重味产物
Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020) Pub Date : 2021-09-01 DOI: 10.22323/1.387.0056
Jianqiao Wang
{"title":"Open heavy-flavor production in pPb collisions at LHCb","authors":"Jianqiao Wang","doi":"10.22323/1.387.0056","DOIUrl":"https://doi.org/10.22323/1.387.0056","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, suggesting a strong suppression for the forward rapidity and no suppression for the backward rapidity. The results help to constrain nuclear parton distribution distribution down to Bjorken-x∼ 10^−5. The charm pair production is first measured in pPb data, which comfirms the enhancement of double parton scattering in pPb collisons. These data provide important inputs to understand the Quark-Gluon Plasma formed in heavy-nucleus collisions.","PeriodicalId":309796,"journal":{"name":"Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124784994","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
Electroweak Probes Experimental Overview: TimeEvolution of Electroweak Measurements 电弱探针实验综述:电弱测量的时间演化
Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020) Pub Date : 2021-09-01 DOI: 10.22323/1.387.0008
Z. Citron
{"title":"Electroweak Probes Experimental Overview: TimeEvolution of Electroweak Measurements","authors":"Z. Citron","doi":"10.22323/1.387.0008","DOIUrl":"https://doi.org/10.22323/1.387.0008","url":null,"abstract":"Electroweak probes of high energy nuclear collisions play a unique role in the study of QCD matter - they grant access to information about the collision without themselves undergoing QCD interactions. This provides a probe of the initial state through QGP evolution. Indeed, studies of electroweak probes have played a role of forming and answering key questions of high energy nuclear collisions in the last decades. In this article, a selection of the recent results of electroweak measurements discussed at the Hard Probes 2020 conference are presented.","PeriodicalId":309796,"journal":{"name":"Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126500353","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
Exploring potential jet modification in small collision systems with two particle correlations at PHENIX 在PHENIX上探索两粒子相关的小型碰撞系统中潜在的射流修饰
Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020) Pub Date : 2021-09-01 DOI: 10.22323/1.387.0107
Cheuk-Ping Wong
{"title":"Exploring potential jet modification in small collision systems with two particle correlations at PHENIX","authors":"Cheuk-Ping Wong","doi":"10.22323/1.387.0107","DOIUrl":"https://doi.org/10.22323/1.387.0107","url":null,"abstract":"Flow results in the small collision systems at RHIC and the LHC indicate QGP droplets are formed in these small systems. Measurements of jet $R_{pA}$ on the other hand shows that there is no modification to the jets. However, non-zero $v_n$ values for high momentum particles, which in ${A+A}$ collisions are attributed to path-length dependent energy loss, have been observed in small systems. To further probe possible modification to jet particles, PHENIX measures the relative modification of the near and away-side jet particles in $pi^0$-hadron correlations in $200$~GeV ${d+Au}$ and $^3He+Au$ collisions. Similar modification as observed in ${A+A}$ collision, such as suppression of high $p_T$ particle yield and enhancement of low momentum associated with the high $p_T$ trigger have been observed in ${d+Au}$ collisions. These surprising results have now also been seen in $^3He+Au$ data. These PHENIX measurements and possible interpretations of these intriguing results are presented.","PeriodicalId":309796,"journal":{"name":"Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020)","volume":"972 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134095157","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 long-range correlations in $mathrm{gamma A}$ and $pp$ collisions with ATLAS 与ATLAS的$ mathm {gamma A}$和$pp$碰撞的长程相关测量
Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020) Pub Date : 2021-09-01 DOI: 10.22323/1.387.0111
B. Seidlitz
{"title":"Measurements of long-range correlations in $mathrm{gamma A}$ and $pp$ collisions with ATLAS","authors":"B. Seidlitz","doi":"10.22323/1.387.0111","DOIUrl":"https://doi.org/10.22323/1.387.0111","url":null,"abstract":"Measurements of long-range correlations in small systems have resulted in the observation of very similar signatures as in large systems. The correlations in large systems are known to arise from the hydrodynamic flow of the quark-gluon plasma (QGP). \u0000In small systems like $pp$ collisions, the interpretations of these collective signatures are much more diverse, ranging from a small droplet of QGP to initial-state correlations. To test the origin and sensitivity of these correlations to semi-hard processes, this proceeding presents the results of a two-particle correlation analysis that explicitly rejects particles from low-$p_mathrm{T}$ jets. The sensitivity of the correlations to the presence of $Z$-boson production in the event is also tested in $pp$ collisions. \u0000To further understand the origin of collective behavior of small systems, it is essential to study a diverse set of systems. This proceeding presents the observation of long-range correlations in photo-nuclear collisions. \u0000This behavior is possibly the result of the hadronic nature of the photon wave function. The process studied here is a subset of those available at the future Electron Ion Collider.","PeriodicalId":309796,"journal":{"name":"Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020)","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127578983","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
In-medium transverse momentum broadening effects ondi-jet observables 中向横向动量展宽对射流观测的影响
Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020) Pub Date : 2021-09-01 DOI: 10.22323/1.387.0128
M. Rohrmoser, K. Kutak, A. Hameren, W. Płaczek, K. Tywoniuk
{"title":"In-medium transverse momentum broadening effects ondi-jet observables","authors":"M. Rohrmoser, K. Kutak, A. Hameren, W. Płaczek, K. Tywoniuk","doi":"10.22323/1.387.0128","DOIUrl":"https://doi.org/10.22323/1.387.0128","url":null,"abstract":"Heavy ion collisions at high energies can be used as an interesting way to recreate and study the medium of the quark-gluon plasma (QGP). We particularly investigate the jets produced in hard binary collisions and their interactions with a tentative medium. These jets were obtained numerically from the Monte-Carlo simulations of hard collisions using the Katie-algorithm [1], where parton momenta within the colliding nucleons were describe by means of unintegrated parton distribution functions (uPDF). We evolved these jets within a medium that contains both, transverse kicks (yielding a broadening in momentum transvers to the jet-axis) as well as medium induced radiation within the Mincas-algorithm [2] following the works of [3,4]. We produce qualitative results for the decorrelation of dijets. In particular, we study deviations from a transverse momentum broadening that follows a Gaussian distribution.\u0000\u0000[1] A. van Hameren, Comput.Phys.Commun. 224 (2018) 371-380 \u0000[2] K. Kutak, W. Paczek, R. Straka, Eur.Phys.J. C79 (2019) no.4, 317 \u0000[3] J.-P. Blaizot, F. Dominguez, E. Iancu, Y. Mehtar-Tani, JHEP 1301 (2013) 143 \u0000[4] J.-P. Blaizot, F. Dominguez, E. Iancu, Y. Mehtar-Tani, JHEP 1406 (2014) 075","PeriodicalId":309796,"journal":{"name":"Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133331475","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
Full solution of the medium-induced radiation spectrum 介质诱导辐射谱的全解
Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020) Pub Date : 2021-09-01 DOI: 10.22323/1.387.0125
C. Andres, L. Apolinário, F. Dominguez
{"title":"Full solution of the medium-induced radiation spectrum","authors":"C. Andres, L. Apolinário, F. Dominguez","doi":"10.22323/1.387.0125","DOIUrl":"https://doi.org/10.22323/1.387.0125","url":null,"abstract":"New measurements of jet quenching observables at RHIC and at the LHC, such as jet substructure observables, demand an increased precision in the theory calculations describing medium-induced radiation of gluons. Closed expressions for the gluon spectrum including a full resummation of multiple scatterings have been known for the past 20 years. Still they have only been evaluated in specific limits either taking a few terms in an opacity expansion or by employing a Gaussian approximation for the interaction potential – which misses essential physical effects. We present here a new flexible method to compute the full spectrum for a realistic interaction potential, thus allowing us for the first time to properly quantify the effect of the all-order resummation of multiple scatterings. This new approach paves the way for precision phenomenological studies including multiple scattering effects such as coherence phenomena.","PeriodicalId":309796,"journal":{"name":"Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132571367","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
Quarkonium: Experimental Overview 夸克元素:实验概述
Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020) Pub Date : 2021-09-01 DOI: 10.22323/1.387.0021
M. Durham
{"title":"Quarkonium: Experimental Overview","authors":"M. Durham","doi":"10.22323/1.387.0021","DOIUrl":"https://doi.org/10.22323/1.387.0021","url":null,"abstract":"The study of the bound states of heavy quarks in a QCD medium is an important foundation of heavy ion physics. Two major experiments at the Relativistic Heavy Ion Collider (PHENIX and STAR) and four major experiments at the Large Hadron Collider (ALICE, ATLAS, CMS, and LHCb) are all producing new results and refining previous observations with unprecedented precision and kinematic reach. In addition, measurements of the interactions of exotic heavy quark states with a QCD medium are becoming accessible for the first time. The proceedings discuss new results and remaining puzzles in quarkonium measurements, the first experimental results on exotic hadrons in the QCD medium, and give a brief outlook on future facilities.","PeriodicalId":309796,"journal":{"name":"Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020)","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131308439","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
Quarkonia: Theory 间:理论
Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020) Pub Date : 2021-09-01 DOI: 10.22323/1.387.0020
Yan-Qing Ma, An-Ping Chen
{"title":"Quarkonia: Theory","authors":"Yan-Qing Ma, An-Ping Chen","doi":"10.22323/1.387.0020","DOIUrl":"https://doi.org/10.22323/1.387.0020","url":null,"abstract":"Recently, there have been significant progresses for theories of quarkonium production in proton-proton and proton-nucleus collisions at colliders. We give a brief review of these theories, with emphasis on the successes and difficulties of nonrelativistic QCD factorization formalism, as well as the new proposal of soft gluon factorization.","PeriodicalId":309796,"journal":{"name":"Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129816598","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
On gauge invariance of transverse momentum dependent distributions at small x 小x处横向动量相关分布的规范不变性
Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020) Pub Date : 2021-09-01 DOI: 10.22323/1.387.0182
Y. Mehtar-Tani, R. Boussarie
{"title":"On gauge invariance of transverse momentum dependent distributions at small x","authors":"Y. Mehtar-Tani, R. Boussarie","doi":"10.22323/1.387.0182","DOIUrl":"https://doi.org/10.22323/1.387.0182","url":null,"abstract":"Transverse momentum dependent (TMD) distributions at small x exhibit a rich infinite twist structure that encompasses the leading twist (partonic) distributions as well as the physics of gluon saturation. Progress to further the connection between the standard TMD framework at moderate x and small x has been recently made. In this context, we show that light cone Wilson line operators at small-x can be formulated in terms of transverse gauge links. This new formulation of small x operators allows a direct matching with the standard leading twist gluon TMD distributions and provides an efficient and general prescription for computing TMD distributions at small x beyond leading twist.","PeriodicalId":309796,"journal":{"name":"Proceedings of 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes2020)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129067783","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
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