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Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018)最新文献

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Lattice Landau gauge quark propagator at finite temperature 有限温度下晶格朗道规范夸克传播子
Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018) Pub Date : 2018-11-30 DOI: 10.22323/1.336.0163
P. Silva, O. Oliveira
{"title":"Lattice Landau gauge quark propagator at finite temperature","authors":"P. Silva, O. Oliveira","doi":"10.22323/1.336.0163","DOIUrl":"https://doi.org/10.22323/1.336.0163","url":null,"abstract":"We study the Landau gauge quark propagator, at finite temperature, using quenched lattice simulations. Special focus is given to the behaviour of the momentum space form factors across the confinement-deconfinement phase transition.","PeriodicalId":441384,"journal":{"name":"Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124858488","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
One-loop lattice study of composite bilinear operators in Supersymmetric QCD 超对称QCD中复合双线性算子的单环格研究
Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018) Pub Date : 2018-11-30 DOI: 10.22323/1.336.0170
Mário Costa, H. Panagopoulos
{"title":"One-loop lattice study of composite bilinear operators in Supersymmetric QCD","authors":"Mário Costa, H. Panagopoulos","doi":"10.22323/1.336.0170","DOIUrl":"https://doi.org/10.22323/1.336.0170","url":null,"abstract":"We study 4-dimensional SQCD with gauge group SU(Nc) and Nf flavors of chiral supermultiplets on the lattice. We perform extensive calculations of matrix elements and renormalization factors of composite operators in Perturbation Theory. In particular, we compute the renormalization factors of quark and squark bilinears, as well as their mixing at the quantum level with gluino and gluon bilinear operators. From these results we construct correctly renormalized composite operators, which are free of mixing effects and may be employed in non-perturbative studies of Supersymmetry. All our calculations have been performed with massive matter fields, in order to regulate the infrared singularities which are inherent in renormalizing squark bilinears. Furthermore, the quark and squark propagators are computed in momentum space with nonzero masses. \u0000This work is a feasibility study for lattice computations relevant to a number of observables, such as spectra and distribution functions of hadrons, but in the context of supersymmetric QCD, as a forerunner to lattice investigations of SUSY extensions of the Standard Model.","PeriodicalId":441384,"journal":{"name":"Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132779730","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
Selected updates on semileptonic $B$ decays and $|V_{xb}|$ determination 精选更新了半光子$B$衰减和$|V_{xb}|$测定
Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018) Pub Date : 2018-11-30 DOI: 10.22323/1.336.0128
G. Ricciardi
{"title":"Selected updates on semileptonic $B$ decays and $|V_{xb}|$ determination","authors":"G. Ricciardi","doi":"10.22323/1.336.0128","DOIUrl":"https://doi.org/10.22323/1.336.0128","url":null,"abstract":"We summarize selected up-to-date results related to semileptonic $B$ meson decays, namely results on the exclusive determination of the parameter $|V_{cb}|$ of the CKM matrix, on the inclusive determination of $|V_{ub}|$, and on $R(D^{(*)})$.","PeriodicalId":441384,"journal":{"name":"Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121041819","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
Dynamical spin effects in the pseudoscalar nonetwithin holographic QCD 伪标量全息QCD中的动态自旋效应
Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018) Pub Date : 2018-11-30 DOI: 10.22323/1.336.0093
M. Ahmady, C. Mondal, R. Sandapen
{"title":"Dynamical spin effects in the pseudoscalar nonetwithin holographic QCD","authors":"M. Ahmady, C. Mondal, R. Sandapen","doi":"10.22323/1.336.0093","DOIUrl":"https://doi.org/10.22323/1.336.0093","url":null,"abstract":"We investigate the importance of dynamical spin effects in the holographic light-front wavefunctions of the pseudoscalar mesons. We find that these effects are crucial to describe the pion data while they are not necessary to describe the available kaon data. For $eta-eta^prime$ system, we find that dynamical spin effects are required to describe their transition form factors data.","PeriodicalId":441384,"journal":{"name":"Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018)","volume":"18 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123648397","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
String-like theory as solution to the sign problem of a finite density gauge theory 类弦理论作为有限密度规理论符号问题的解
Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018) Pub Date : 2018-11-30 DOI: 10.22323/1.336.0049
K. Langfeld
{"title":"String-like theory as solution to the sign problem of a finite density gauge theory","authors":"K. Langfeld","doi":"10.22323/1.336.0049","DOIUrl":"https://doi.org/10.22323/1.336.0049","url":null,"abstract":"Z3 gauge theory with dynamical (bosonic) matter is studied in 4 dimensions with a finite chemical potential. This theory could be viewed as an effective theory describing the centre vortex picture of QCD colour confinement, but it is studied here with local interactions as theory in its own right. It is shown that the sign-problem can be solved by dualisation. The dual theory is derived: the pure gauge sector is a theory of closed membranes with Nambu-Goto action, and matter is described by open branes bounded by closed matter loops. The brane theory is simulated with Monte-Carlo techniques. Some evidence is found that the theory possesses a weakly-renormalisable phase with the scale set by a mass gap. Deconfinement at low temperatures and finite chemical potentials appears as a percolation transition for matter loops.","PeriodicalId":441384,"journal":{"name":"Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123351497","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
Infrared Behaviour of SU(2) Gauge Theory with $N_f$ fundamental flavours 具有N_f基本特征的SU(2)规范理论的红外行为
Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018) Pub Date : 2018-11-29 DOI: 10.22323/1.336.0225
V. Leino, K. Rummukainen, Joni M. Suorsa, K. Tuominen, Sara Tahtinen
{"title":"Infrared Behaviour of SU(2) Gauge Theory with $N_f$ fundamental flavours","authors":"V. Leino, K. Rummukainen, Joni M. Suorsa, K. Tuominen, Sara Tahtinen","doi":"10.22323/1.336.0225","DOIUrl":"https://doi.org/10.22323/1.336.0225","url":null,"abstract":"We review our recent results on the infrared behaviour of the SU(2) gauge theory with $N_f$ massless fundamental flavour fermions. We have analyzed the running of the coupling in SU(2) gauge theories with six and eight fermionic flavours using the gradient flow step scaling method. From the running of the coupling, we see a clear indication of an infrared stable fixed point in theories with six and eight flavours. These results are confirmed by our mass spectrum study, where we varied the number of flavours from two to six. We also compute the anomalous dimensions of mass and coupling.","PeriodicalId":441384,"journal":{"name":"Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117053824","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: 8
BRST invariant $d=2$ condensates in Gribov-Zwanziger theory Gribov-Zwanziger理论中的BRST不变量$d=2$凝聚体
Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018) Pub Date : 2018-11-29 DOI: 10.22323/1.336.0044
D. Dudal, C. Felix, L. Palhares, Franccois Rondeau, D. Vercauteren
{"title":"BRST invariant $d=2$ condensates in Gribov-Zwanziger theory","authors":"D. Dudal, C. Felix, L. Palhares, Franccois Rondeau, D. Vercauteren","doi":"10.22323/1.336.0044","DOIUrl":"https://doi.org/10.22323/1.336.0044","url":null,"abstract":"In this proceeding, $SU(N)$ Yang-Mills theory is quantized in the linear covariant gauges, while taking into account the issue of Gribov copies and we construct the one-loop effective potential for a set of mass dimension 2 condensates, including the Gribov parameter, that refines the infrared region of the Gribov-Zwanziger theory, whilst respecting renormalization group invariance and BRST symmetry.","PeriodicalId":441384,"journal":{"name":"Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128958323","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-winding flux tubes in CFL quark matter CFL夸克物质中的多绕组磁通管
Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018) Pub Date : 2018-11-29 DOI: 10.22323/1.336.0213
A. Haber, A. Schmitt
{"title":"Multi-winding flux tubes in CFL quark matter","authors":"A. Haber, A. Schmitt","doi":"10.22323/1.336.0213","DOIUrl":"https://doi.org/10.22323/1.336.0213","url":null,"abstract":"Color-flavor locked quark matter can be described as a three-component superconductor and thus shows unconventional behavior in the transition regime from type-I to type-II superconductivity. We discuss this behavior by studying magnetic line defects in a Ginzburg-Landau approach, taking into account all possible values of the three winding numbers. After a brief discussion of the defects that include baryon circulation we focus on pure magnetic flux tubes. We show that at strong coupling, relevant for neutron stars, type-II behavior is conceivable and the most preferred configuration has minimal total winding. Only at weak coupling we find a regime where multi-winding flux tubes are preferred, although this regime most likely requires an unrealistically large superconducting gap.","PeriodicalId":441384,"journal":{"name":"Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018)","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116592491","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
Review of quarkonium production: status and prospects 夸克元素生产综述:现状与展望
Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018) Pub Date : 2018-11-29 DOI: 10.22323/1.336.0007
Hee Sok Chung
{"title":"Review of quarkonium production: status and prospects","authors":"Hee Sok Chung","doi":"10.22323/1.336.0007","DOIUrl":"https://doi.org/10.22323/1.336.0007","url":null,"abstract":"Production cross sections of heavy quarkonia are considered as useful tools to study various aspects of QCD. We have entered a new era of quarkonium production phenomenology, with the help of new measurements from the LHC giving access to more varieties of observables, and recent theoretical developments that provided us a better understanding of the short-distance process in which quarkonia are produced. With a more concrete understanding of perturbative corrections and a prolific collection of data, a satisfactory description of the quarkonium production mechanism might now be within reach. Unfortunately, the exact mechanism of quarkonium production still remains elusive. Even analyses based on the same formalism can lead to different descriptions of the production process and give contradicting predictions of processes involving heavy quarkonia. This implies that there are much more physics yet to be understood and much work yet to be done in quarkonium production phenomenology. In this paper, we review the current status of theoretical approaches and discuss possible strategies that may improve our understanding of heavy quarkonium production.","PeriodicalId":441384,"journal":{"name":"Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121740743","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: 9
Current status of $varepsilon'/varepsilon$ in the Standard Model 标准模型中$varepsilon'/varepsilon$的当前状态
Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018) Pub Date : 2018-11-28 DOI: 10.22323/1.336.0178
H. Gisbert
{"title":"Current status of $varepsilon'/varepsilon$ in the Standard Model","authors":"H. Gisbert","doi":"10.22323/1.336.0178","DOIUrl":"https://doi.org/10.22323/1.336.0178","url":null,"abstract":"A recent lattice prediction of $varepsilon'/varepsilon$, with a 2.1 $sigma$ deviation from the experimental value, has triggered several studies of possible contributions from physics beyond the Standard Model. We have recently updated the SM prediction, including all known short-distance and long-distance contributions, our result $mbox{Re}left(varepsilon'/varepsilonright) = (15 pm 7)cdot 10^{-4}$ is in complete agreement with the experimental measurement. In addition, we emphasize on the importance of the long-distance re-scattering of the final pions in $K to pi pi$ for a correct prediction of $varepsilon'/varepsilon$.","PeriodicalId":441384,"journal":{"name":"Proceedings of XIII Quark Confinement and the Hadron Spectrum — PoS(Confinement2018)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122056389","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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