arXiv: High Energy Physics - Lattice最新文献_第2页

Construction of bbu¯d¯ tetraquark states on lattice with NRQCD bottom and HISQ up and down quarks 具有NRQCD底夸克和HISQ上夸克和下夸克的晶格上bbu¯d¯四夸克态的构造

arXiv: High Energy Physics - Lattice Pub Date : 2020-08-25 DOI: 10.1103/physrevd.102.094516

Protick Mohanta, S. Basak

引用次数: 14

PDFs and Neutrino-Nucleon Scattering from Hadronic Tensor pdf和强子张量中的中微子-核子散射

arXiv: High Energy Physics - Lattice Pub Date : 2020-08-22 DOI: 10.22323/1.363.0046

Jian Liang, Keh-Fei Liu

引用次数: 3

Relative scale setting for two-color QCD with $N_f=2$ Wilson fermions $N_f=2$ Wilson费米子双色QCD的相对尺度设置

arXiv: High Energy Physics - Lattice Pub Date : 2020-08-14 DOI: 10.1093/ptep/ptaa170

K. Iida, E. Itou, Tong-Gyu Lee

{"title":"Relative scale setting for two-color QCD with $N_f=2$ Wilson fermions","authors":"K. Iida, E. Itou, Tong-Gyu Lee","doi":"10.1093/ptep/ptaa170","DOIUrl":"https://doi.org/10.1093/ptep/ptaa170","url":null,"abstract":"We determine the scale setting function and the pseudo-critical temperature on the lattice in $N_f=2$ two-color QCD using the Iwasaki gauge and Wilson fermion actions. Although two-color QCD does not correspond to the real world, it is very useful as a good testing ground for three-color QCD. The scale setting function gives the relative lattice spacings of simulations performed at different values of the bare coupling. It is a necessary tool for taking the continuum limit. Firstly, we measure the meson spectra for various combinations of ($beta,kappa$) and find a line of constant physics in $beta$--$kappa$ plane. Next, we determine the scale setting function via $w_0$ scale in the gradient flow method. Furthermore, we estimate the pseudo-critical temperature at zero chemical potential from the chiral susceptibility. Combining these results, we can discuss the QCD phase diagram in which both axes are given by dimensionless quantities, namely, the temperature normalized by the pseudo-critical temperature on the lattice and the chemical potential normalized by the pseudoscalar meson mass. It makes it easy to compare among several lattice studies and also makes it possible to compare theoretical analyses and lattice studies in the continuum limit.","PeriodicalId":8440,"journal":{"name":"arXiv: High Energy Physics - Lattice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72811382","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: 14

Double-winding Wilson loops in SU(N) lattice Yang-Mills gauge theory SU(N)晶格Yang-Mills规范理论中的双绕组Wilson环

arXiv: High Energy Physics - Lattice Pub Date : 2020-08-09 DOI: 10.1103/physrevd.102.094521

S. Kato, A. Shibata, K. Kondo

引用次数: 1

Application of effective field theory to finite-volume effects in aμHVP 有效场理论在aμHVP有限体积效应中的应用

arXiv: High Energy Physics - Lattice Pub Date : 2020-08-09 DOI: 10.1103/physrevd.102.094511

C. Aubin, T. Blum, M. Golterman, S. Peris

引用次数: 4

Bethe-Salpeter amplitudes of Upsilons

arXiv: High Energy Physics - Lattice Pub Date : 2020-07-31 DOI: 10.1103/physrevd.102.114508

R. Larsen, S. Meinel, S. Mukherjee, P. Petreczky

引用次数: 5

Strangeonium-like hybrids on the lattice 晶格上的类奇异杂化

arXiv: High Energy Physics - Lattice Pub Date : 2020-07-29 DOI: 10.1088/1674-1137/abc241

Yunheng Ma, Ying Chen, M. Gong, Zhaofeng Liu

{"title":"Strangeonium-like hybrids on the lattice","authors":"Yunheng Ma, Ying Chen, M. Gong, Zhaofeng Liu","doi":"10.1088/1674-1137/abc241","DOIUrl":"https://doi.org/10.1088/1674-1137/abc241","url":null,"abstract":"The strangeonium-like $sbar{s}g$ hybrids are investigated from lattice QCD in the quenched approximation. In the Coulomb gauge, spatially extended operators are constructed for $1^{--}$ and $(0,1,2)^{-+}$ states with the color octet $sbar{s}$ component being separated from the chromomagnetic field strength by spatial distances $r$, whose matrix elements between the vacuum and the corresponding states are interpreted as Bethe-Salpeter (BS) wave functions. In each of the $(1,2)^{-+}$ channels, the masses and the BS wave functions are reliably derived. The $1^{-+}$ ground state mass is around 2.1-2.2 GeV, and that of $2^{-+}$ is around 2.3-2.4 GeV, while the masses of the first excited states are roughly 1.4 GeV higher. This mass splitting is much larger than the expectation of the phenomenological flux-tube model or constituent gluon model for hybrids, which is usually a few hundred MeV. The BS wave functions with respect to $r$ show clear radial nodal structures of non-relativistic two-body system, which imply that $r$ is a meaningful dynamical variable for these hybrids and motivate a color halo picture of hybrids that the color octet $sbar{s}$ is surrounded by gluonic degrees of freedom. In the $1^{--}$ channel, the properties of the lowest two states comply with those of $phi(1020)$ and $phi(1680)$. We have not obtained convincing information relevant to $phi(2170)$ yet, however, we argue that whether $phi(2170)$ is a conventional $sbar{s}$ meson or a $sbar{s}g$ hybrid within the color halo scenario, the ratio of partial decay widths $Gamma(phi eta)$ and $Gamma (phi eta')$ observed by BESIII can be understood by the mechanism of hadronic transition of a strangeonium-like meson along with the $eta-eta'$ mixing.","PeriodicalId":8440,"journal":{"name":"arXiv: High Energy Physics - Lattice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86784978","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

Valence parton distribution of the pion from lattice QCD: Approaching the continuum limit 晶格QCD介子的价部子分布:接近连续体极限

arXiv: High Energy Physics - Lattice Pub Date : 2020-07-13 DOI: 10.1103/physrevd.102.094513

Xiang Gao, Luchang Jin, C. Kallidonis, Nikhil Karthik, S. Mukherjee, P. Petreczky, Charles Shugert, S. Syritsyn, Yong Zhao

引用次数: 34

Role of boundary conditions in quantum computations of scattering observables 边界条件在散射观测量量子计算中的作用

arXiv: High Energy Physics - Lattice Pub Date : 2020-07-01 DOI: 10.1103/physrevd.103.014506

R. Briceño, J. V. Guerrero, M. Hansen, A. Sturzu

{"title":"Role of boundary conditions in quantum computations of scattering observables","authors":"R. Briceño, J. V. Guerrero, M. Hansen, A. Sturzu","doi":"10.1103/physrevd.103.014506","DOIUrl":"https://doi.org/10.1103/physrevd.103.014506","url":null,"abstract":"Quantum computing may offer the opportunity to simulate strongly-interacting field theories, such as quantum chromodynamics, with physical time evolution. This would give access to Minkowski-signature correlators, in contrast to the Euclidean calculations routinely performed at present. However, as with present-day calculations, quantum computation strategies still require the restriction to a finite system size, including a finite, usually periodic, spatial volume. In this work, we investigate the consequences of this in the extraction of hadronic and Compton-like scattering amplitudes. Using the framework presented in Phys. Rev. D101 014509 (2020), we quantify the volume effects for various $1+1$D Minkowski-signature quantities and show that these can be a significant source of systematic uncertainty, even for volumes that are very large by the standards of present-day Euclidean calculations. We then present an improvement strategy, based in the fact that the finite volume has a reduced symmetry. This implies that kinematic points, which yield the same Lorentz invariants, may still be physically distinct in the finite-volume system. As we demonstrate, both numerically and analytically, averaging over such sets can significantly suppress the unwanted volume distortions and improve the extraction of the physical scattering amplitudes.","PeriodicalId":8440,"journal":{"name":"arXiv: High Energy Physics - Lattice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91467293","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: 19

Lattice investigation of exotic tetraquark channels 奇异四夸克通道的晶格研究

arXiv: High Energy Physics - Lattice Pub Date : 2020-06-25 DOI: 10.1103/physrevd.102.114506

R. Hudspith, B. Colquhoun, A. Francis, R. Lewis, K. Maltman

引用次数: 30