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

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Spectral Projectors Method for Staggered Fermions 交错费米子的光谱投影方法
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2019-12-22 DOI: 10.22323/1.363.0089
C. Bonanno, Giuseppe Clemente, M. D’Elia, F. Sanfilippo
{"title":"Spectral Projectors Method for Staggered Fermions","authors":"C. Bonanno, Giuseppe Clemente, M. D’Elia, F. Sanfilippo","doi":"10.22323/1.363.0089","DOIUrl":"https://doi.org/10.22323/1.363.0089","url":null,"abstract":"We extend the spectral projectors method to staggered fermions. Applying the index theorem to the staggered Dirac operator it is possible to work out an expression for the topological susceptibility which depends only on the orthogonal projectors on quasi zero-modes, as it has already been done for Dirac-Wilson fermions. Besides, we generalize this method deriving analogous expressions for all higher-order coefficients in the $theta$-expansion of the vacuum energy.","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117068811","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
Sp(2N) Yang-Mills towards large N. Sp(2N) Yang-Mills趋向大N。
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2019-12-20 DOI: 10.22323/1.363.0177
Jack Holligan, E. Bennett, D. Hong, Jong-Wan Lee, C. Lin, B. Lucini, M. Piai, Davide Vadacchino
{"title":"Sp(2N) Yang-Mills towards large N.","authors":"Jack Holligan, E. Bennett, D. Hong, Jong-Wan Lee, C. Lin, B. Lucini, M. Piai, Davide Vadacchino","doi":"10.22323/1.363.0177","DOIUrl":"https://doi.org/10.22323/1.363.0177","url":null,"abstract":"Non-perturbative aspects of the physics of $Sp(2N)$ gauge theories are interesting for phenomenological and theoretical reasons, and little studied so far, particularly in the approach to the large-$N$ limit. We examine the spectrum of glueballs and the string tension of Yang-Mills theories based upon these groups. Glueball masses are calculated numerically with a variational method from Monte-Carlo generated lattice gauge configurations. After taking continuum limits for $N$ = 1, 2, 3 and 4, we extrapolate the results towards large $N$. We compare the resulting spectrum with that of $SU(N)$ gauge theories, both at finite $N$ and as $N$ approaches infinity.","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127132695","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
Semileptonic $Btopiellnu$, $Bto Dellnu$, $B_sto Kellnu$, and $B_sto D_sellnu$ decays
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2019-12-20 DOI: 10.22323/1.363.0184
J. Flynn, R. Hill, A. Juttner, A. Soni, J. Tsang, O. Witzel
{"title":"Semileptonic $Btopiellnu$, $Bto Dellnu$, $B_sto Kellnu$, and $B_sto D_sellnu$ decays","authors":"J. Flynn, R. Hill, A. Juttner, A. Soni, J. Tsang, O. Witzel","doi":"10.22323/1.363.0184","DOIUrl":"https://doi.org/10.22323/1.363.0184","url":null,"abstract":"We present updates for our nonperturbative lattice QCD calculations to determine semileptonic form factors for exclusive $Bto piellnu$, $Bto D ellnu$, $B_sto Kell nu$, and $B_sto D_sellnu$ decays. Our calculation is based on RBC-UKQCD's set of $2+1$-dynamical-flavor gauge field ensembles. In the valence sector we use domain wall fermions for up/down, strange and charm quarks, whereas bottom quarks are simulated with the relativistic heavy quark action. The continuum limit is based on three lattice spacings. Using kinematical $z$ expansions we aim to obtain form factors over the full $q^2$ range. These form factors are the basis for predicting ratios addressing lepton flavor universality or, when combined with experimental results, to obtain CKM matrix elements $|V_{ub}|$ and $|V_{cb}|$.","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129052353","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
Continuous Time Simulations of Strong Coupling LQCD at Finite Baryon Density 有限重子密度下强耦合LQCD的连续时间模拟
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2019-12-20 DOI: 10.22323/1.363.0163
Marc Klegrewe, W. Unger
{"title":"Continuous Time Simulations of Strong Coupling LQCD at Finite Baryon Density","authors":"Marc Klegrewe, W. Unger","doi":"10.22323/1.363.0163","DOIUrl":"https://doi.org/10.22323/1.363.0163","url":null,"abstract":"We study lattice QCD in the limit of infinite gauge coupling on a discrete spatial yet continuous Euclidean time lattice at finite baryon chemical potential $mu_B$. The continuous time framework is based on sending $N_taurightarrow infty$ and the bare anisotropy to infinity while fixing the temperature in a non-perturbative setup. This leads to a sign problem free algorithm that allows us to study the whole $mu_B$-$T$ plane. We construct Taylor coefficients required for a Taylor expansion in the pressure at zero chemical potential and in the chiral limit. On that account, cumulants in the baryon number density are measured in various fashions to improve on accuracy. These calculations are based on our worm type Monte Carlo algorithm featuring a polymer resummation scheme and a histogram method.","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130393254","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 Hubbard model in the canonical formulation 哈伯德模型中的规范表述
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2019-12-19 DOI: 10.22323/1.363.0249
S. Burri, U. Wenger
{"title":"The Hubbard model in the canonical formulation","authors":"S. Burri, U. Wenger","doi":"10.22323/1.363.0249","DOIUrl":"https://doi.org/10.22323/1.363.0249","url":null,"abstract":"We describe non-relativistic fermions on the lattice (Hubbard model) in the canonical formulation using transfer matrices in fixed fermion number sectors such that the partition function becomes fully factorized in time. By analytically integrating out the auxiliary Hubbard-Stratanovich field due to the four-fermion interaction, we express the system in terms of discrete, local fermion occupation numbers which are the only remaining degrees of freedom. We show the close relation to the fermion loop and the fermion bag formulation. One can prove that in 1+1 dimension the fermion sign problem is absent. Finally, we construct improved estimators for the ground state energy, 2-point functions, and for the chemical potential.","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126508259","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
Phase structure and real-time dynamics of the massive Thirring model in 1+1 dimensions using the tensor-network method 用张量网络方法研究1+1维大质量Thirring模型的相位结构和实时动力学
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2019-12-16 DOI: 10.22323/1.363.0022
M. Bañuls, K. Cichy, H. Hung, Y. Kao, C. Lin, Yu-Ping Lin, David T.-L. Tan
{"title":"Phase structure and real-time dynamics of the massive Thirring model in 1+1 dimensions using the tensor-network method","authors":"M. Bañuls, K. Cichy, H. Hung, Y. Kao, C. Lin, Yu-Ping Lin, David T.-L. Tan","doi":"10.22323/1.363.0022","DOIUrl":"https://doi.org/10.22323/1.363.0022","url":null,"abstract":"We present concluding results from our study for zero-temperature phase structure of the massive Thirring model in 1+1 dimensions with staggered regularisation. Employing the method of matrix product states, several quantities, including two types of correlators, are investigated, leading to numerical evidence of a Berezinskii-Kosterlitz-Thouless phase transition. Exploratory results for real-time dynamics pertaining to this transition, obtained using the approaches of variational uniform matrix product state and time-dependent variational principle, are also discussed.","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129507904","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
The $B to D^astellnu$ semileptonic decay at nonzero recoil and its implications for $|V_{cb}|$ and $R(D^ast)$ 非零反冲下的$B to D^ast阱nu$半光子衰变及其对$|V_{cb}|$和$R(D^ast)$的意义
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2019-12-12 DOI: 10.22323/1.363.0049
A. V. Avil'es-Casco, C. DeTar, A. El-Khadra, A. Kronfeld, J. Laiho, R. V. D. Water
{"title":"The $B to D^astellnu$ semileptonic decay at nonzero recoil and its implications for $|V_{cb}|$ and $R(D^ast)$","authors":"A. V. Avil'es-Casco, C. DeTar, A. El-Khadra, A. Kronfeld, J. Laiho, R. V. D. Water","doi":"10.22323/1.363.0049","DOIUrl":"https://doi.org/10.22323/1.363.0049","url":null,"abstract":"We present nearly final results from our analysis of the form factors for $Bto D^astellnu$ decay at nonzero recoil. Our analysis includes 15 MILC asqtad ensembles with $N_f=2+1$ flavors of sea quarks and lattice spacings ranging from $aapprox0.15$ fm down to $0.045$ fm. The valence light quarks employ the asqtad action, whereas the $b$ and $c$ quarks are treated using the Fermilab action. We discuss the impact that our results will have on $ |V_{cb} |$ and $R(D^ast)$.","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125057041","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
Non-perturbative renormalization in QCD+QED and its applications to weak decays QCD+QED中的非微扰重整化及其在弱衰变中的应用
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2019-12-12 DOI: 10.22323/1.363.0196
M. Di Carlo, G. Martinelli, D. Giusti, V. Lubicz, C. Sachrajda, F. Sanfilippo, S. Simula, N. Tantalo
{"title":"Non-perturbative renormalization in QCD+QED and its applications to weak decays","authors":"M. Di Carlo, G. Martinelli, D. Giusti, V. Lubicz, C. Sachrajda, F. Sanfilippo, S. Simula, N. Tantalo","doi":"10.22323/1.363.0196","DOIUrl":"https://doi.org/10.22323/1.363.0196","url":null,"abstract":"","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124697792","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
Stress distribution in quark—anti-quark and single quark systems at nonzero temperature 非零温度下夸克-反夸克和单夸克系统的应力分布
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2019-12-10 DOI: 10.22323/1.363.0004
R. Yanagihara, T. Iritani, M. Kitazawa, M. Asakawa, T. Hatsuda
{"title":"Stress distribution in quark—anti-quark and single quark systems at nonzero temperature","authors":"R. Yanagihara, T. Iritani, M. Kitazawa, M. Asakawa, T. Hatsuda","doi":"10.22323/1.363.0004","DOIUrl":"https://doi.org/10.22323/1.363.0004","url":null,"abstract":"We explore the distribution of the energy momentum tensor (EMT) around quark--anti-quark and single quark at nonzero temperature in SU(3) Yang-Mills gauge theory by extending our previous study on the EMT distribution in static quark--anti-quark systems in vacuum. We discuss the disappearance of the flux tube structure observed in the vacuum simulation. We investigate the total stress acting on the mid-plane between a quark and an anti-quark and show that it agrees with the force obtained from the derivative of the free energy. The color Debye screening effect in the deconfined phase is also discussed in terms of the EMT distribution.","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129592029","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
Does confinement imply CP invariance of the strong interactions? 约束是否意味着强相互作用的CP不变性?
Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019) Pub Date : 2019-12-09 DOI: 10.22323/1.363.0172
Y. Nakamura, G. Schierholz
{"title":"Does confinement imply CP invariance of the strong interactions?","authors":"Y. Nakamura, G. Schierholz","doi":"10.22323/1.363.0172","DOIUrl":"https://doi.org/10.22323/1.363.0172","url":null,"abstract":"The strong coupling constant $1/g^2$ and the vacuum angle $theta$ of the SU(3) Yang-Mills theory are investigated in the infrared limit under the renormalization group flow. It is shown that the theory has an infrared attractive fixed point at $1/g^2 = theta = ,0$, which leads to linear confinement and naturally solves the strong CP problem. In particular, any initial value of $theta neq 0$ is found to be driven to $theta = 0$ at macroscopic distances, where quarks and gluons freeze into hadrons by the confinement mechanism.","PeriodicalId":147987,"journal":{"name":"Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128528351","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
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