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Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019)最新文献

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Pion observables with the Minkowski Space Pion Model 用Minkowski空间介子模型观测到的介子
Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019) Pub Date : 2020-05-06 DOI: 10.22323/1.374.0037
João Pacheco De Melo, R. M. Moita, T. Frederico
{"title":"Pion observables with the Minkowski Space Pion Model","authors":"João Pacheco De Melo, R. M. Moita, T. Frederico","doi":"10.22323/1.374.0037","DOIUrl":"https://doi.org/10.22323/1.374.0037","url":null,"abstract":"The pion structure in Minkowski space is described in terms of an analytic model of the Bethe-Salpeter amplitude combined with Euclidean Lattice QCD results for the running quark mass. In the present work, a pion model previously proposed, which allows for a Nakanishi integral representation, is studied in order to verify the sensitivity of the pion electromagnetic form factor to small variations of the quark self-energy. In addition, we extend the previous work, providing the Nakanishi integral representation for the invariants associated with a decomposition of the pion Bethe-Salpeter amplitude.","PeriodicalId":299412,"journal":{"name":"Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019)","volume":"57 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123387524","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
The homogeneous Bethe-Salpeter equation for fermion-scalar systems in Minkowski space 闵可夫斯基空间中费米-标量系统的齐次Bethe-Salpeter方程
Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019) Pub Date : 2020-05-06 DOI: 10.22323/1.374.0077
G. Salmè, T. Frederico, J. Nogueira, E. Pace
{"title":"The homogeneous Bethe-Salpeter equation for fermion-scalar systems in Minkowski space","authors":"G. Salmè, T. Frederico, J. Nogueira, E. Pace","doi":"10.22323/1.374.0077","DOIUrl":"https://doi.org/10.22323/1.374.0077","url":null,"abstract":"The approach for solving the Bethe-Salpeter equation of bound systems with spin degrees of freedom has been further tested by investigating a fermion-scalar bound state. The main outcome of such a study is given by the extraction of genuinely dynamical information on both the valence probabilities and light-front distributions (longitudinal and transverse ones) and it has been achieved by exploiting the well-known Nakanishi integral representation of the Bethe-Salpeter amplitude. The whole set of obtained results improves the perspective of actually constructing a phenomenological framework where the dynamical features of a bound system can be studied directly in Minkowski space.","PeriodicalId":299412,"journal":{"name":"Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129465143","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
Probing linearly polarized gluon distribution in electron-proton collision at EIC EIC中电子-质子碰撞中线极化胶子分布的探测
Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019) Pub Date : 2020-05-06 DOI: 10.22323/1.374.0051
R. Kishore, A. Mukherjee
{"title":"Probing linearly polarized gluon distribution in electron-proton collision at EIC","authors":"R. Kishore, A. Mukherjee","doi":"10.22323/1.374.0051","DOIUrl":"https://doi.org/10.22323/1.374.0051","url":null,"abstract":"We present a recent estimate [8] of azimuthal asymmetry $(cos~2phi)$ in $J/psi$ production in ep collision within the kinematics of the planned electron-ion collider (EIC). We find a small but sizable asymmetry in the small-$x$ region which can be observed at the EIC. This asymmetry directly probes the Weizs\"acker-Williams (WW) type linearly polarized gluon distribution in the unpolarized proton. We calculate the asymmetry at next-to-leading order in the kinematical region which satisfies, energy fraction of $J/psi$, $z < 1$ and the subprocess $gamma^∗ + g rightarrow c + bar{c}+ g$ gives the leading contribution. We use color singlet (CS) model for $J/psi$ production. We estimate the asymmetry in two models for TMDs: (i) Gaussian type parameterization and (ii) McLerran-Venugopalan (MV) model at small-$x$ and also we present the upper bound of the asymmetry.","PeriodicalId":299412,"journal":{"name":"Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019)","volume":"166 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126267187","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
The dipole picture and the non-relativistic expansion 偶极子图像和非相对论性膨胀
Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019) Pub Date : 2020-05-06 DOI: 10.22323/1.374.0039
Miguel Angel Escobedo Espinosa, T. Lappi
{"title":"The dipole picture and the non-relativistic expansion","authors":"Miguel Angel Escobedo Espinosa, T. Lappi","doi":"10.22323/1.374.0039","DOIUrl":"https://doi.org/10.22323/1.374.0039","url":null,"abstract":"We study exclusive quarkonium production in the dipole picture at next-to-leading order (NLO) accuracy, using the non-relativistic expansion for the quarkonium wavefunction. The quarkonium light cone wave functions needed in the dipole picture have typically been available only at tree level, either in phenomenological models or in the nonrelativistic limit. Here, we discuss the compatibility of the dipole approach and the non-relativistic expansion and compute NLO relativistic corrections to the quarkonium light-cone wave function in light-cone gauge.","PeriodicalId":299412,"journal":{"name":"Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115203054","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
Chiral symmetry restoration and the thermal $f_0(500)$ state 手性对称恢复与热态f_0(500)$
Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019) Pub Date : 2020-02-03 DOI: 10.22323/1.374.0086
A. Vioque-Rodr'iguez, A. G. Nicola
{"title":"Chiral symmetry restoration and the thermal $f_0(500)$ state","authors":"A. Vioque-Rodr'iguez, A. G. Nicola","doi":"10.22323/1.374.0086","DOIUrl":"https://doi.org/10.22323/1.374.0086","url":null,"abstract":"We analize the role played by the thermal $f_0(500)$ state or $sigma$ in chiral symmetry restoration. The temperature corrections to the spectral properties of that state are included in order to provide a better description of the scalar susceptibility $chi_S$ around the transition region. We use the Linear Sigma Model to establish the relation between $chi_S$ and the $sigma$ propagator, which is used as a benchmark to test the approach where $chi_S$ is saturated by the $f_0(500)$ inverse self-energy. Within such saturation approach, a peak for $chi_S$ around the chiral transition is obtained when considering the $f_0(500)$ generated as a $pipi$ scattering pole within Unitarized Chiral Perturbation Theory at finite temperature. That approach yields results complying with lattice data when the uncertainties of the low-energy constants are taken into account. Those uncertainties and the unitarization method are used to check the robustness of this approximation. Finally, we will discuss some recent results within the chiral lagrangian framework related to the topological susceptibility and its connection with chiral and $U_A(1)$ restoration.","PeriodicalId":299412,"journal":{"name":"Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114942664","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
Light front quantum mechanics and quantum field theory 光前沿量子力学和量子场论
Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019) Pub Date : 2020-01-17 DOI: 10.22323/1.374.0009
W. Polyzou
{"title":"Light front quantum mechanics and quantum field theory","authors":"W. Polyzou","doi":"10.22323/1.374.0009","DOIUrl":"https://doi.org/10.22323/1.374.0009","url":null,"abstract":"Contribution to Light Cone 2019: This contribution discusses some of the advantages and unique properties of relativistic quantum theories with kinematic light-front symmetries.","PeriodicalId":299412,"journal":{"name":"Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123422408","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
Basis light-front quantization approach to nucleon 核子的基光前量子化方法
Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019) Pub Date : 2020-01-13 DOI: 10.22323/1.374.0067
C. Mondal, Siqi Xu, Jiangshan Lan, Xingbo Zhao, Yang Li, D. Chakrabarti, J. Vary
{"title":"Basis light-front quantization approach to nucleon","authors":"C. Mondal, Siqi Xu, Jiangshan Lan, Xingbo Zhao, Yang Li, D. Chakrabarti, J. Vary","doi":"10.22323/1.374.0067","DOIUrl":"https://doi.org/10.22323/1.374.0067","url":null,"abstract":"We obtain the light-front wavefunctions for the nucleon in the valence quark Fock space from an effective Hamiltonian, which includes the transverse and longitudinal confinement and the one-gluon exchange interaction with fixed coupling. The wavefunctions are generated by solving the eigenvalue equation in a basis light-front quantization. Fitting the model parameters, the wavefunctions lead to good simultaneous description of electromagnetic form factors, radii, and parton distribution functions for the proton.","PeriodicalId":299412,"journal":{"name":"Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116899075","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: 3
Boson Stars and QCD Boson Stars 玻色子星和QCD玻色子星
Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019) Pub Date : 2020-01-11 DOI: 10.22323/1.374.0054
U. Kulshreshtha, Sanjeev Kumar, D. Kulshreshtha, J. Kunz
{"title":"Boson Stars and QCD Boson Stars","authors":"U. Kulshreshtha, Sanjeev Kumar, D. Kulshreshtha, J. Kunz","doi":"10.22323/1.374.0054","DOIUrl":"https://doi.org/10.22323/1.374.0054","url":null,"abstract":"In this talk, we present a review of our work on boson stars in a theory of a massless complex scalar field in the presence of a $U(1)$ gauge field and gravity. A sequence of bifurcation points obtained in the phase diagrams of the theory is presented and the plots of the mass $~M~$ versus charge $~Q~$ as well as plots of the mass per unit charge $~M/Q~$ versus the charge $~Q~$ of the boson stars are presented along with a discussion of the results. We also present some ideas on the possibilities of QCD boson stars.","PeriodicalId":299412,"journal":{"name":"Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115196840","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
An overview of light-front holography 光前全息术概述
Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019) Pub Date : 2020-01-10 DOI: 10.22323/1.374.0011
R. Sandapen
{"title":"An overview of light-front holography","authors":"R. Sandapen","doi":"10.22323/1.374.0011","DOIUrl":"https://doi.org/10.22323/1.374.0011","url":null,"abstract":"Light-front holography offers a successful first semiclassical approximation to hadronic spectroscopy and dynamics. We review its underlying assumptions, its remarkable predictions as well as attempts to go beyond the semiclassical approximation in order to the describe a wide range of data with a universal AdS/QCD mass scale.","PeriodicalId":299412,"journal":{"name":"Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126099634","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
Glueballs as gravitons in holographic approaches 胶球作为全息方法中的引力子
Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019) Pub Date : 2020-01-07 DOI: 10.22323/1.374.0094
M. Rinaldi
{"title":"Glueballs as gravitons in holographic approaches","authors":"M. Rinaldi","doi":"10.22323/1.374.0094","DOIUrl":"https://doi.org/10.22323/1.374.0094","url":null,"abstract":"In this contribution we present a a phenomenological analysis of the scalar glueball and scalar meson spectra within AdS/QCD models in the bottom-up approach. In particular, we consider a Light-Front QCD framework which allows to relate the AdS/QCD mode functions to the hadronic wave-functions. Such a procedure is here adopted to analyse the mixing between scalar mesons and glueballs.","PeriodicalId":299412,"journal":{"name":"Proceedings of Light Cone 2019 - QCD on the light cone: from hadrons to heavy ions — PoS(LC2019)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121301987","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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