Calculation of Nucleon Electric Dipole Moments Induced by Quark Chromo-Electric Dipole Moments and the QCD θ-termElectric dipole moments (EDMs) of nucleons and nuclei, which are sought as evidence of CP violation, require lattice calculations to connect constraints from experiments to limits on the strong CP…S. Syritsyn, T. Izubuchi, H. Ohki·Jan 16, 2019SaveLearn
Reconstructing parton distribution functions from Ioffe time data: from Bayesian methods to Neural NetworksThe computation of the parton distribution functions (PDF) or distribution amplitudes (DA) of hadrons from first principles lattice QCD constitutes a central open problem. In this study, we present…Joseph Karpie, Kostas Orginos, Alexander Rothkopf et al.·Jan 16, 2019SaveLearn
Reweighting Lefschetz ThimblesWe present a novel reweighting technique to calculate the relative weights in the Lefschetz thimble decomposition of a path integral. Our method is put to work using a U(1) one-link model providing…Stefan Bluecher, Jan M. Pawlowski, Manuel Scherzer et al.·Jan 16, 2019SaveLearn
Bs Ds(*)lν Form Factors with Heavy HISQ QuarksWe present progress on an ongoing calculation of the Bs Ds(*) l ν form factors calculated on the nf=2+1+1 MILC ensembles and using the Highly Improved Staggered Quark action for all…E. McLean, C. T. H. Davies, A. T. Lytle et al.·Jan 15, 2019SaveLearn
The strange quark contribution to the spin of the nucleonQuark line disconnected matrix elements of an operator, such as the axial current, are difficult to compute on the lattice. The standard method uses a stochastic estimator of the operator, which is…R. Horsley, Y. Nakamura, H. Perlt et al.·Jan 15, 2019SaveLearn
Insight into thermal modifications of quarkonia from a comparison of continuum-extrapolated lattice results to perturbative QCD^In this work, we strive to gain insight into thermal modifications of charmonium and bottomonium bound states as well as the heavy quark diffusion coefficient. The desired information is contained in…H. -T. Ding, O. Kaczmarek, A. -L. Kruse et al.·Jan 14, 2019SaveLearn
Towards non-perturbative matching of three/four-flavor Wilson coefficients with a position-space procedureWe propose a strategy to non-perturbatively match the Wilson coefficients in the three- and four-flavor theories, which uses two-point Green's functions of the corresponding four-quark operators…Masaaki Tomii·Jan 14, 2019SaveLearn
Pion Valence Quark Distribution from Matrix Element Calculated in Lattice QCDWe present the first exploratory lattice QCD calculation of the pion valence quark distribution extracted from spatially separated current-current correlations in coordinate space. We show that an…Raza Sabbir Sufian, Joseph Karpie, Colin Egerer et al.·Jan 13, 2019SaveLearn
One-loop renormalization of staple-shaped operators in continuum and lattice regularizationsIn this paper we present one-loop results for the renormalization of nonlocal quark bilinear operators, containing a staple-shaped Wilson line, in both continuum and lattice regularizations. The…Martha Constantinou, Haralambos Panagopoulos, Gregoris Spanoudes·Jan 12, 2019SaveLearn
Scale Setting and Topological Observables in Pure SU(2) LGTIn this dissertation, we investigate the approach of pure SU(2) lattice gauge theory to its continuum limit using the deconfinement temperature, six gradient scales, and six cooling scales. We find…David Clarke·Jan 10, 2019SaveLearn
Abelian gauge theories on the lattice: θ-terms and compact gauge theory with(out) monopolesWe discuss a particular lattice discretization of abelian gauge theories in arbitrary dimensions. The construction is based on gauging the center symmetry of a non-compact abelian gauge theory, which…Tin Sulejmanpasic, Christof Gattringer·Jan 9, 2019SaveLearn
Variational analysis of low-lying states in supersymmetric Yang-Mills theoryWe have calculated the masses of bound states numerically in N = 1 supersymmetric Yang-Mills theory with gauge group SU(2). Using the suitably optimised variational method with an operator basis…Sajid Ali, Georg Bergner, Henning Gerber et al.·Jan 8, 2019SaveLearn
Bs Kν decay from lattice QCDWe use lattice QCD to calculate the form factors f+(q2) and f0(q2) for the semileptonic decay Bs Kν. Our calculation uses six MILC asqtad 2+1 flavor gauge-field ensembles with three…A. Bazavov, C. Bernard, C. DeTar et al.·Jan 8, 2019SaveLearn
Measuring of chiral susceptibility using gradient flowIn lattice QCD with Wilson-type quarks, the chiral symmetry is explicitly broken by the Wilson term on finite lattices. Though the symmetry is guaranteed to recover in the continuum limit, a series…Atsushi Baba, Shinji Ejiri, Kazuyuki Kanaya et al.·Jan 8, 2019SaveLearn
Evaluating topological charge density with symmetric multi-probing methodWe evaluated the topological charge density of SU(3) gauge fields on lattice by calculating the trace of overlap Dirac matrix employing symmetric multi-probing(SMP) method with 3 modes. Since the…Guang-Yi Xiong, Jian-Bo Zhang, You-Hao Zou·Jan 8, 2019SaveLearn
On the calculation and use of non-zero momentum correlators in lattice simulationsIn lattice simulations one generally projects correlators over zero spatial momentum to calculate masses and related spectral data. The sum over space lattice points, however, discards information…Claudio Rebbi·Jan 7, 2019SaveLearn
Relation between scattering amplitude and Bethe-Salpeter wave function in quantum field theoryWe discuss an exact relation between the two-particle scattering amplitude and the Bethe-Salpeter (BS) wave function inside the interaction range in quantum field theory. In the relation the reduced…Takeshi Yamazaki, Yoshinobu Kuramashi·Jan 7, 2019SaveLearn
Study of energy-momentum tensor correlation function in Nf=2+1 full QCD for QGP viscositiesWe study correlation functions of the energy-momentum tensor (EMT) in (2+1)-flavor full QCD to evaluate QGP viscosities. We adopt nonperturbatively improved Wilson fermion and Iwasaki gauge action.…Yusuke Taniguchi, Atsushi Baba, Shinji Ejiri et al.·Jan 7, 2019SaveLearn
Quark orbital angular momentum in the proton evaluated using a direct derivative methodQuark orbital angular momentum (OAM) in the proton can be calculated directly given a Wigner function encoding the simultaneous distribution of quark transverse positions and momenta. This…M. Engelhardt, J. Green, N. Hasan et al.·Jan 3, 2019SaveLearn
Localization and topology in high temperature QCDAt high temperature part of the spectrum of the quark Dirac operator is known to consist of localized states. This comes about because around the crossover temperature to the quark-gluon plasma…Tamas G. Kovacs, Reka A. Vig·Jan 3, 2019SaveLearn
Lattice QCD and Three-particle Decays of ResonancesMost strong-interaction resonances have decay channels involving three or more particles, including many of the recently discovered X, Y and Z resonances. In order to study such resonances from…Maxwell T. Hansen, Stephen R. Sharpe·Jan 2, 2019SaveLearn
B Dν at non-zero recoilWe present preliminary blinded results from our analysis of the form factors for B→ Dν decay at non-zero recoil. Our analysis includes 15 MILC asqtad ensembles with Nf=2+1…Alejandro Vaquero Avilés-Casco, Carleton DeTar, Aida X. El-Khadra et al.·Jan 1, 2019SaveLearn
Updates on Nucleon Form Factors from Clover-on-HISQ Lattice FormulationUpdates on results for the electric, magnetic and axial vector form factors are presented. The data analyzed cover high statistics measurements on 11 ensembles generated with 2+1+1 flavors of HISQ…Yong-Chull Jang, Tanmoy Bhattacharya, Rajan Gupta et al.·Dec 31, 2018SaveLearn
Lattice-QCD Determination of the Hyperon Axial Couplings in the Continuum LimitWe present the first continuum extrapolation of the hyperon octet axial couplings (gΣΣ and gΞΞ) from Nf=2+1+1 lattice QCD. These couplings are important parameters in the low-energy…Aditya Savanur, Huey-Wen Lin·Dec 31, 2018SaveLearn
The path from finite to infinite volume: Hadronic observables from lattice QCDStandard Model determinations of properties of strongly interacting systems of hadrons have become possible with the powerful method of lattice quantum chromodynamics (LQCD), a method with growing…Zohreh Davoudi·Dec 31, 2018SaveLearn