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Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)最新文献

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Euclidean correlation functions of the topological charge density 拓扑电荷密度的欧氏相关函数
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2020-01-31 DOI: 10.22323/1.363.0219
Lukas Mazur, L. Altenkort, O. Kaczmarek, Hai-Tao Shu
{"title":"Euclidean correlation functions of the topological charge density","authors":"Lukas Mazur, L. Altenkort, O. Kaczmarek, Hai-Tao Shu","doi":"10.22323/1.363.0219","DOIUrl":"https://doi.org/10.22323/1.363.0219","url":null,"abstract":"We present first results of our study on the Euclidean topological charge density correlation function. In order to get a well defined topological charge density and to improve the signal of the correlation function at large separations we make use of the gradient flow. We investigate the flow-time dependence on fine quenched lattices. The final goal of this study is to perform a continuum extrapolation for the pure SU(3) plasma and to extract the related transport coefficient, the sphaleron rate.","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115638689","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: 5
One-thimble regularisation of lattice field theories: is it only a dream? 点阵场理论的一针规格化:它只是一个梦吗?
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2020-01-31 DOI: 10.22323/1.363.0105
F. Renzo, Simran Singh, K. Zambello
{"title":"One-thimble regularisation of lattice field theories: is it only a dream?","authors":"F. Renzo, Simran Singh, K. Zambello","doi":"10.22323/1.363.0105","DOIUrl":"https://doi.org/10.22323/1.363.0105","url":null,"abstract":"Lefschetz thimbles regularisation of (lattice) field theories was put forward as a possible solution to the sign problem. Despite elegant and conceptually simple, it has many subtleties, a major one boiling down to a plain question: how many thimbles should we take into account? In the original formulation, a single thimble dominance hypothesis was put forward: in the thermodynamic limit, universality arguments could support a scenario in which the dominant thimble (associated to the global minimum of the action) captures the physical content of the field theory. We know by now many counterexamples and we have been pursuing multi-thimble simulations ourselves. Still, a single thimble regularisation would be the real breakthrough. We report on ongoing work aiming at a single thimble formulation of lattice field theories, in particular putting forward the proposal of performing Taylor expansions on the dominant thimble.","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123981613","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: 4
Electromagnetic corrections to leptonic pion decay from lattice QCD using infinite-volume reconstruction method 用无限体积重构方法对晶格QCD轻子介子衰变进行电磁修正
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2020-01-31 DOI: 10.22323/1.363.0259
Xu Feng
{"title":"Electromagnetic corrections to leptonic pion decay from lattice QCD using infinite-volume reconstruction method","authors":"Xu Feng","doi":"10.22323/1.363.0259","DOIUrl":"https://doi.org/10.22323/1.363.0259","url":null,"abstract":"","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123333225","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: 7
Exotic Phases of a Higgs-Yukawa Model withReduced Staggered Fermions 减少交错费米子的希格斯-汤川模型的奇异相
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2020-01-30 DOI: 10.22323/1.363.0044
S. Catterall, N. Butt, D. Schaich
{"title":"Exotic Phases of a Higgs-Yukawa Model withReduced Staggered Fermions","authors":"S. Catterall, N. Butt, D. Schaich","doi":"10.22323/1.363.0044","DOIUrl":"https://doi.org/10.22323/1.363.0044","url":null,"abstract":"We investigate the phase structure of a four dimensional SO(4) invariant lattice Higgs-Yukawa model comprising four reduced staggered fermions interacting with a real scalar field. The fermions belong to the fundamental representation of the symmetry group while the three scalar field components transform in the self-dual representation of SO(4). We explore the phase diagram and find evidence of a continuous transition between a phase where the fermions are massless to one where the fermions acquire mass. This transition is not associated with symmetry breaking and there is no obvious local order parameter.","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121930002","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: 4
Nucleon Axial Form Factors from Clover Fermion on 2+1+1-flavor HISQ Lattice 三叶草费米子在2+1+1味HISQ晶格上的核子轴向形状因子
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2020-01-30 DOI: 10.22323/1.363.0131
Yong-Chull Jang, Rajan Gupta, Tanmoy Bhattacharya, Sungwoo Park, B. Yoon, Huey-Wen Lin
{"title":"Nucleon Axial Form Factors from Clover Fermion on 2+1+1-flavor HISQ Lattice","authors":"Yong-Chull Jang, Rajan Gupta, Tanmoy Bhattacharya, Sungwoo Park, B. Yoon, Huey-Wen Lin","doi":"10.22323/1.363.0131","DOIUrl":"https://doi.org/10.22323/1.363.0131","url":null,"abstract":"The nucleon axial form factors -- axial $G_A$, induced pseudoscalar $widetilde{G}_P$ and pseudoscalar $G_P$ -- have displayed large systematics in lattice QCD calculations. The major symptoms were the violation of the partially conserved axial current (PCAC) relation between the three form factors, and the underestimation of the induced pseudoscalar coupling $g_P^ast$ and the axial charge radius $r_A$ compared to phenomenological estimates. The small $g_P^ast$ was a consequence of the failure of the pion-pole dominance (PPD) hypothesis, especially at low $M_pi^2$. The small charge radius $r_A$ and the underestimate of $g_A$ were related. The dominant systematic responsible is the lack of inclusion of low-energy ($N pi$) states that are not manifest in the multiexponential fit to the nucleon two-point correlator. We show that this low-energy state can be determined from the three-point correlator $langle N A_4 N rangle $ with the insertion of the temporal component of the axial current $A_4$ within the nucleon state, ie, the strategy labeled $S_{A4}$ [1]. Including this low-energy state in fits to control excited-state contamination (ESC) gives results for $g_A$, $r_A$, and $g_P^ast$ that are consistent with experimental/phenomenological values. However, the systematic uncertainties, especially in data at small $Q^2$, are now much larger.","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129006272","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
Continuum limit of SU(3) $mathcal{N}=1$ supersymmetric Yang-Mills theory and supersymmetric gauge theories on the lattice 格上SU(3) $mathcal{N}=1$超对称Yang-Mills理论和超对称规范理论的连续统极限
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2020-01-27 DOI: 10.22323/1.363.0175
Sajid Ali, G. Bergner, H. Gerber, C. L'opez, I. Montvay, G. Munster, S. Piemonte, P. Scior
{"title":"Continuum limit of SU(3) $mathcal{N}=1$ supersymmetric Yang-Mills theory and supersymmetric gauge theories on the lattice","authors":"Sajid Ali, G. Bergner, H. Gerber, C. L'opez, I. Montvay, G. Munster, S. Piemonte, P. Scior","doi":"10.22323/1.363.0175","DOIUrl":"https://doi.org/10.22323/1.363.0175","url":null,"abstract":"We summarize our investigations of several aspects of $mathcal{N}=1$ supersymmetric Yang-Mills (SYM) theory. We present our final results for SU(3) $mathcal{N}=1$ SYM simulated with Wilson fermions. We also discuss the first test of the simulations of the theory with overlap gluinos. Finally, we present some recent progresses concerning the phase structure of the compactified theory on $R^3times S^1$.","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126322618","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
$(1+1)$-d $U(1)$ Quantum Link Models from Effective Hamiltonians of Dipolar Molecules $(1+1)$-d $U(1)$偶极分子有效哈密顿量的量子链接模型
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2020-01-26 DOI: 10.22323/1.363.0125
Jiayu Shen, Di Luo, Michael Highman, B. Clark, B. Demarco, A. El-Khadra, B. Gadway
{"title":"$(1+1)$-d $U(1)$ Quantum Link Models from Effective Hamiltonians of Dipolar Molecules","authors":"Jiayu Shen, Di Luo, Michael Highman, B. Clark, B. Demarco, A. El-Khadra, B. Gadway","doi":"10.22323/1.363.0125","DOIUrl":"https://doi.org/10.22323/1.363.0125","url":null,"abstract":"We study the promising idea of using dipolar molecular systems as analog quantum simulators for quantum link models, which are discrete versions of lattice gauge theories. In a quantum link model the link variables have a finite number of degrees of freedom and discrete values. We construct the effective Hamiltonian of a system of dipolar molecules with electric dipole-dipole interactions, where we use the tunable parameters of the system to match it to the target Hamiltonian describing a U(1) quantum link model in 1+1 dimensions.","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133398791","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
Quark masses and decay constants in $N_f=2+1+1$ isoQCD with Wilson clover twisted mass fermions 威尔森三叶草扭曲质量费米子在$N_f=2+1+1$ isoQCD中的夸克质量和衰变常数
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2020-01-24 DOI: 10.22323/1.363.0181
Extended Twisted Mass Collaboration Georg Bergner, P. Dimopoulos, J. Finkenrath, E. Fiorenza, R. Frezzotti, M. Garofalo, B. Kostrzewa, F. Sanfilippo, S. Simula, U. Wenger
{"title":"Quark masses and decay constants in $N_f=2+1+1$ isoQCD with Wilson clover twisted mass fermions","authors":"Extended Twisted Mass Collaboration Georg Bergner, P. Dimopoulos, J. Finkenrath, E. Fiorenza, R. Frezzotti, M. Garofalo, B. Kostrzewa, F. Sanfilippo, S. Simula, U. Wenger","doi":"10.22323/1.363.0181","DOIUrl":"https://doi.org/10.22323/1.363.0181","url":null,"abstract":"We present a preliminary study of the pion, kaon and D-meson masses and decay constants in isosymmetric QCD, as well as a preliminary result for the light-quark renormalized mass. The analysis is based on the gauge ensembles produced by ETMC with $N_f=2+1+1$ flavours of Wilson-clover twisted mass quarks, spanning a range of lattice spacings from $sim0.10$ to $0.07$ fm and include configurations at the physical pion point on lattices with linear size up to $L~sim~5.6$~fm","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125078050","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: 7
Charm CP: $Delta A_{CP}$ and Radiative decays 魅力CP: $ δ A_{CP}$和辐射衰减
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2020-01-21 DOI: 10.22323/1.363.0111
A. Soni
{"title":"Charm CP: $Delta A_{CP}$ and Radiative decays","authors":"A. Soni","doi":"10.22323/1.363.0111","DOIUrl":"https://doi.org/10.22323/1.363.0111","url":null,"abstract":"Motivated by the very important discovery of CP violation in charm-decays for the first time, by the LHCb collaboration, the role of nearby resonances such as the scalar $f_0(1710)$ in accounting for the observed CP is discussed. It is suggested that the influence of such a resonance may also explain the long-standing puzzle of such a large breaking of SU(3) seen in its decays. It is also explained that intervention of such resonance(s) will render first principles calculations of $Delta A_{CP}$ rather difficult. Instead, it is proposed that searches for CP violation in simple radiative final states, such as $D^0 to gamma phi [to K^+ K^-]$, $D^0 to l^+ l^- pi$ etc. has much better chance of theoretical precision studies and therefore theoretical and experimental investigations therein are strongly urged.","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125748894","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
Chiral Ward identities for Dirac eigenmodes with staggered fermions 交错费米子Dirac本征模的手性Ward恒等式
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2020-01-18 DOI: 10.22323/1.363.0031
Hwancheol Jeong, C. Jung, Sunghee Kim, Weonjong Lee, Jeonghwan Pak
{"title":"Chiral Ward identities for Dirac eigenmodes with staggered fermions","authors":"Hwancheol Jeong, C. Jung, Sunghee Kim, Weonjong Lee, Jeonghwan Pak","doi":"10.22323/1.363.0031","DOIUrl":"https://doi.org/10.22323/1.363.0031","url":null,"abstract":"We study chiral properties of eigenvalue spectrum for staggered quarks. We present a new method to identify would-be zero modes and nonzero modes using their symmetry and chiral properties. Here, we review the traditional method with HYP improved staggered quarks, and extend it to a completely new method which uses the chiral Ward identities and leakage patterns to achieve the goal.","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114343081","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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