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Dissecting the $$Delta I=1/2$$ rule at large $$N_c$$ 详细剖析$$Delta I=1/2$$规则 $$N_c$$
arXiv: High Energy Physics - Lattice Pub Date : 2020-03-23 DOI: 10.1140/EPJC/S10052-020-8192-3
A. Donini, P. Hern'andez, C. Peña, F. Romero-López
{"title":"Dissecting the $$Delta I=1/2$$ rule at large $$N_c$$","authors":"A. Donini, P. Hern'andez, C. Peña, F. Romero-López","doi":"10.1140/EPJC/S10052-020-8192-3","DOIUrl":"https://doi.org/10.1140/EPJC/S10052-020-8192-3","url":null,"abstract":"","PeriodicalId":8440,"journal":{"name":"arXiv: High Energy Physics - Lattice","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74308333","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
Constraints on charm-anticharm asymmetry in the nucleon from lattice QCD 晶格QCD中核子的粲-反粲不对称约束
arXiv: High Energy Physics - Lattice Pub Date : 2020-03-02 DOI: 10.1016/j.physletb.2020.135633
R. Sufian, Tianbo Liu, A. Alexandru, S. Brodsky, Guy F. de Téramond, H. Dosch, T. Draper, Keh-Fei Liu, Yi-Bo Yang
{"title":"Constraints on charm-anticharm asymmetry in the nucleon from lattice QCD","authors":"R. Sufian, Tianbo Liu, A. Alexandru, S. Brodsky, Guy F. de Téramond, H. Dosch, T. Draper, Keh-Fei Liu, Yi-Bo Yang","doi":"10.1016/j.physletb.2020.135633","DOIUrl":"https://doi.org/10.1016/j.physletb.2020.135633","url":null,"abstract":"","PeriodicalId":8440,"journal":{"name":"arXiv: High Energy Physics - Lattice","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85892638","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: 30
Thermal phase structure of a supersymmetric matrix model 超对称矩阵模型的热相结构
arXiv: High Energy Physics - Lattice Pub Date : 2020-03-02 DOI: 10.22323/1.363.0069
D. Schaich, Raghav G. Jha, Anosh Joseph
{"title":"Thermal phase structure of a supersymmetric matrix model","authors":"D. Schaich, Raghav G. Jha, Anosh Joseph","doi":"10.22323/1.363.0069","DOIUrl":"https://doi.org/10.22323/1.363.0069","url":null,"abstract":"We present initial results from ongoing lattice investigations into the thermal phase structure of the Berenstein--Maldacena--Nastase deformation of maximally supersymmetric Yang--Mills quantum mechanics. The phase diagram of the theory depends on both the temperature $T$ and the deformation parameter $mu$, through the dimensionless ratios $T / mu$ and $g equiv lambda / mu^3$ with $lambda$ the 't Hooft coupling. Considering couplings $g$ that span three orders of magnitude, we reproduce the weak-coupling perturbative prediction for the deconfinement $T / mu$ and approach recent large-$N$ dual supergravity analyses in the strong-coupling limit. We are carrying out calculations with lattice sizes up to $N_{tau} = 24$ and numbers of colors up to $N = 16$, to allow initial checks of the large-$N$ continuum limit.","PeriodicalId":8440,"journal":{"name":"arXiv: High Energy Physics - Lattice","volume":"117 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81062913","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
Recent results of nucleon structure & matrix elementcalculations 核子结构与矩阵元素计算的最新结果
arXiv: High Energy Physics - Lattice Pub Date : 2020-02-20 DOI: 10.22323/1.363.0247
Tanmoy Bhattacharya, Rajan Gupta, B. Yoon
{"title":"Recent results of nucleon structure & matrix elementcalculations","authors":"Tanmoy Bhattacharya, Rajan Gupta, B. Yoon","doi":"10.22323/1.363.0247","DOIUrl":"https://doi.org/10.22323/1.363.0247","url":null,"abstract":"A review of recent lattice calculations of nucleon structure and matrix elements of operators in nucleons is presented. It primarily covers developments in the calculation of the matrix elements of the scalar, tensor, pseudo-scalar, axial-vector and vector operators in the ground state of neutrons and protons in the isospin symmetric limit. Some preliminary calculations of the electric dipole moment, the gravitational moments and stress-energy distribution, and the magnetic polarizability are briefly described.","PeriodicalId":8440,"journal":{"name":"arXiv: High Energy Physics - Lattice","volume":"116 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77969472","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
Stealth dark matter and gravitational waves 隐形暗物质和引力波
arXiv: High Energy Physics - Lattice Pub Date : 2020-02-01 DOI: 10.22323/1.363.0068
D. Schaich
{"title":"Stealth dark matter and gravitational waves","authors":"D. Schaich","doi":"10.22323/1.363.0068","DOIUrl":"https://doi.org/10.22323/1.363.0068","url":null,"abstract":"I present first results from ongoing lattice investigations into the finite-temperature dynamics of stealth dark matter, which adds to the standard model a new SU(4) gauge sector with four moderately heavy fundamental fermions. This work by the Lattice Strong Dynamics Collaboration builds on past studies of direct detection and collider searches for stealth dark matter, by analyzing the early-universe SU(4) confinement transition, which produces a stochastic background of gravitational waves if it is first order. In addition to delineating the parameter space in which a first-order transition is observed, I discuss the quantities we are analyzing in order to predict the resulting gravitational-wave spectrum.","PeriodicalId":8440,"journal":{"name":"arXiv: High Energy Physics - Lattice","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75591118","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
Recent Developments of Muon g-2 from Lattice QCD 晶格QCD中μ子g-2的最新进展
arXiv: High Energy Physics - Lattice Pub Date : 2020-01-31 DOI: 10.22323/1.363.0224
V. Gülpers
{"title":"Recent Developments of Muon g-2 from Lattice QCD","authors":"V. Gülpers","doi":"10.22323/1.363.0224","DOIUrl":"https://doi.org/10.22323/1.363.0224","url":null,"abstract":"One of the most promising quantities for the search of signatures of physics beyond the Standard Model is the anomalous magnetic moment $g-2$ of the muon, where a comparison of the experimental result with the Standard Model estimate yields a deviation of about $3.5~sigma$. On the theory side, the largest uncertainty arises from the hadronic sector, namely the hadronic vacuum polarisation and the hadronic light-by-light scattering. I review recent progress in calculating the hadronic contributions to the muon $g-2$ from the lattice and discuss the prospects and challenges to match the precision of the upcoming experiments.","PeriodicalId":8440,"journal":{"name":"arXiv: High Energy Physics - Lattice","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87212992","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
Neutron Electric Dipole Moments with Clover Fermions 三叶草费米子的中子电偶极矩
arXiv: High Energy Physics - Lattice Pub Date : 2020-01-31 DOI: 10.22323/1.363.0243
B. Yoon, Tanmoy Bhattacharya, V. Cirigliano, Rajan Gupta
{"title":"Neutron Electric Dipole Moments with Clover Fermions","authors":"B. Yoon, Tanmoy Bhattacharya, V. Cirigliano, Rajan Gupta","doi":"10.22323/1.363.0243","DOIUrl":"https://doi.org/10.22323/1.363.0243","url":null,"abstract":"We present preliminary results for the contributions to the neutron EDM arising from the QCD $theta$-term, the Weinberg three-gluon and the quark chromo-EDM operators from our ongoing lattice calculations using clover valence quarks on the MILC HISQ lattices. We use the gradient-flow technique to smooth the lattices and renormalize the gluonic operators, and use the Schwinger source method to incorporate the quark chromo-EDM interactions in the quark propagator. For the QCD $theta$-term and the Weinberg three-gluon operator, we report results in the gradient-flow scheme from 8 ensembles at four lattice spacings and three pion masses, including 2 physical pion mass ensembles. For the quark chromo-EDM, unrenormalized results are presented at two lattice spacings, $a=0.12$ and $0.09$ fm, and two pion masses, $M_pi = 310$ MeV and $220$ MeV.","PeriodicalId":8440,"journal":{"name":"arXiv: High Energy Physics - Lattice","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91012562","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
Lattice results on dibaryons and baryon–baryon interactions 双重子和重子-重子相互作用的晶格结果
arXiv: High Energy Physics - Lattice Pub Date : 2020-01-23 DOI: 10.1142/9789811219313_0011
S. Aoki
{"title":"Lattice results on dibaryons and baryon–baryon interactions","authors":"S. Aoki","doi":"10.1142/9789811219313_0011","DOIUrl":"https://doi.org/10.1142/9789811219313_0011","url":null,"abstract":"We present the recent study on dibaryons at the almost physical pion mass in lattice QCD by the HAL QCD potential method.","PeriodicalId":8440,"journal":{"name":"arXiv: High Energy Physics - Lattice","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73278027","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
Axial U(1) symmetry and mesonic correlators at high temperature in $N_f=2$ lattice QCD N_f=2晶格QCD高温下的轴向U(1)对称性和介子相关子
arXiv: High Energy Physics - Lattice Pub Date : 2020-01-22 DOI: 10.22323/1.363.0178
Kei Suzuki, S. Aoki, Y. Aoki, G. Cossu, H. Fukaya, S. Hashimoto, C. Rohrhofer
{"title":"Axial U(1) symmetry and mesonic correlators at high temperature in $N_f=2$ lattice QCD","authors":"Kei Suzuki, S. Aoki, Y. Aoki, G. Cossu, H. Fukaya, S. Hashimoto, C. Rohrhofer","doi":"10.22323/1.363.0178","DOIUrl":"https://doi.org/10.22323/1.363.0178","url":null,"abstract":"We investigate the high-temperature phase of QCD using lattice QCD simulations with $N_f = 2$ dynamical Mobius domain-wall fermions. On generated configurations, we study the axial $U(1)$ symmetry, overlap-Dirac spectra, screening masses from mesonic correlators, and topological susceptibility. We find that some of the observables are quite sensitive to lattice artifacts due to a small violation of the chiral symmetry. For those observables, we reweight the Mobius domain-wall fermion determinant by that of the overlap fermion. We also check the volume dependence of observables. Our data near the chiral limit indicates a strong suppression of the axial $U(1)$ anomaly at temperatures $geq$ 220 MeV.","PeriodicalId":8440,"journal":{"name":"arXiv: High Energy Physics - Lattice","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85996913","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
Two-pion scattering amplitude from Bethe-Salpeter wave function at the interaction boundary 贝特-萨尔皮特波函数在相互作用边界处的双介子散射振幅
arXiv: High Energy Physics - Lattice Pub Date : 2020-01-17 DOI: 10.22323/1.363.0032
T. Yamazaki, Y. Namekawa
{"title":"Two-pion scattering amplitude from Bethe-Salpeter wave function at the interaction boundary","authors":"T. Yamazaki, Y. Namekawa","doi":"10.22323/1.363.0032","DOIUrl":"https://doi.org/10.22323/1.363.0032","url":null,"abstract":"We observe that the ratio of the on-shell scattering amplitude to the Bethe-Salpeter (BS) wave function outside the interaction range is almost independent of time in our quenched calculation of the $I=2$ two-pion scattering with almost zero momentum. In order to discuss the time independence, we present a relation between the two-pion scattering amplitude and the surface term of the BS wave function at the boundary. Using the relation under some assumptions, we show that the ratio is independent of time if the two-pion four-point function in early time is dominated by scattering states with almost zero momentum in addition to the ground state of the two-pion scattering.","PeriodicalId":8440,"journal":{"name":"arXiv: High Energy Physics - Lattice","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76263788","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
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