Domain decomposition and multilevel integration for fermionsThe numerical computation of many hadronic correlation functions is exceedingly difficult due to the exponentially decreasing signal-to-noise ratio with the distance between source and sink.…Marco Cè, Leonardo Giusti, Stefan Schaefer·Dec 19, 2016SaveLearn
Recent progress on QCD inputs for axion phenomenologyThe properties of the QCD axion are strictly related to the dependence of strong interactions on the topological parameter theta. We present a determination of the topological properties of QCD for…Claudio Bonati, Massimo D'Elia, Marco Mariti et al.·Dec 19, 2016SaveLearn
Non-perturbative determinations of B-meson decay constants and semi-leptonic form factorsB-physics is one of the most promising windows to find new physics in the flavor sector. One key ingredient to these searches are precise theoretical predictions derived from the Standard Model.…Edwin Lizarazo, Oliver Witzel·Dec 19, 2016SaveLearn
QCD propagators and vertices from lattice QCD (in memory of Michael Müller-Preußker)We review lattice calculations of the elementary Greens functions of QCD with a special emphasis on the Landau gauge. These lattice results have been of interest to continuum approaches to QCD over…Andre Sternbeck·Dec 19, 2016SaveLearn
Electromagnetic Corrections to Meson Masses and the HVPWe present an exploratory study of the electromagnetic corrections to meson masses and the hadronic vacuum polarization using Nf=2+1 Domain Wall fermions. These corrections are estimated with two…Peter Boyle, Vera Gülpers, James Harrison et al.·Dec 18, 2016SaveLearn
Progress in three-particle scattering from LQCDWe present the status of our formalism for extracting three-particle scattering observables from lattice QCD (LQCD). The method relies on relating the discrete finite-volume spectrum of a quantum…Raúl A. Briceño, Maxwell T. Hansen, Stephen R. Sharpe·Dec 18, 2016SaveLearn
Ξc γ→Ξc transition in lattice QCDWe evaluate the electromagnetic Ξc γ→Ξc transition on 2+1 flavor lattices corresponding to a pion mass of 156 MeV. We extract the magnetic Sachs and Pauli form factors…H. Bahtiyar, K. U. Can, G. Erkol et al.·Dec 17, 2016SaveLearn
Tuning the hopping parameter in the Oktay-Kronfeld action for charm and bottom quarks on a MILC HISQ ensembleThe first step in the calculation of semi-leptonic form factors in the decay of heavy mesons is the tuning of the hopping parameter κ for the charm and bottom quark masses. Results for the…Hwancheol Jeong, Weonjong Lee, Jaehoon Leem et al.·Dec 17, 2016SaveLearn
Utilising optimised operators and distillation to extract scattering phase shiftsIn this investigation, we examine how the precision of energy spectra and scattering phase shifts, extracted in lattice QCD, depend upon the degree of distillation type smearing. We use the…Antoni J. Woss, Christopher E. Thomas·Dec 16, 2016SaveLearn
Update on Nf=3 finite temperature QCD phase structure with Wilson-Clover fermion actionWe present an update of the finite temperature phase structure analysis for three flavor QCD. In the study the Iwasaki gauge action and non-perturvatively O(a) improved Wilson-Clover fermion action…Shinji Takeda, Xiao-Yong Jin, Yoshinobu Kuramashi et al.·Dec 16, 2016SaveLearn
Localization and chiral properties near the ordering transition of an Anderson-like toy model for QCDThe Dirac operator in finite temperature QCD is equivalent to the Hamiltonian of an unconventional Anderson model, with on-site noise provided by the fluctuations of the Polyakov lines. The main…Matteo Giordano, Tamas G. Kovacs, Ferenc Pittler·Dec 15, 2016SaveLearn
Form factors for semi-leptonic B decaysSemi-leptonic B decays provide promising channels to test the Standard Model, search for signs of new physics, or determine fundamental parameters like CKM matrix elements. We present an update on…Jonathan Flynn, Taku Izubuchi, Andreas Juttner et al.·Dec 15, 2016SaveLearn
Monte Carlo simulation of ϕ42 and O(N)ϕ43 theoriesWe report lattice simulations of ϕ42 and O(N)\,ϕ4 models, performed by means of a Monte Carlo method based on the all-order strong coupling expansion (worm algorithm). The investigation of the…Barbara De Palma, Marco Guagnelli·Dec 15, 2016SaveLearn
Partially conserved axial vector current and applicationsWe investigate implications of the use of the point-split axial vector current derived from a Wilson like fermionic action. We compute the corresponding renormalization factor nonperturbatively for…R. Horsley, S. Kazmin, Y. Nakamura et al.·Dec 15, 2016SaveLearn
The gradient flow coupling from numerical stochastic perturbation theoryPerturbative calculations of gradient flow observables are technically challenging. Current results are limited to a few quantities and, in general, to low perturbative orders. Numerical stochastic…Mattia Dalla Brida, Martin Lüscher·Dec 15, 2016SaveLearn
Flavour breaking effects in the pseudoscalar meson decay constantsThe SU(3) flavour symmetry breaking expansion in up, down and strange quark masses is extended from hadron masses to meson decay constants. This allows a determination of the ratio of kaon to pion…V. G. Bornyakov, R. Horsley, Y. Nakamura et al.·Dec 14, 2016SaveLearn
Novel applications of Lattice QCD: Parton distribution functions, proton charge radius and neutron electric dipole momentWe briefly discuss the current status of lattice QCD simulations and review selective results on nucleon observables focusing on recent developments in the lattice QCD evaluation of the nucleon form…Constantia Alexandrou·Dec 14, 2016SaveLearn
Complex Langevin simulations of a finite density matrix model for QCDWe study a random matrix model for QCD at finite density via complex Langevin dynamics. This model has a phase transition to a phase with nonzero baryon density. We study the convergence of the…Jacques Bloch, Jonas Glesaaen, Owe Philipsen et al.·Dec 14, 2016SaveLearn
Quark chiral condensate from the overlap quark propagatorFrom the overlap lattice quark propagator calculated in the Landau gauge, we determine the quark chiral condensate by fitting operator product expansion formulas to the lattice data. The quark…Chao Wang, Yujiang Bi, Hao Cai et al.·Dec 14, 2016SaveLearn
Lattice Calculation of Nucleon Isovector Axial Charge with Improved CurrentsWe employ dimension-4 operators to improve the local vector and axial-vector currents and calculate the nucleon isovector axial coupling g3A with overlap valence on 2+1-flavor Domain Wall…Jian Liang, Yi-Bo Yang, Keh-Fei Liu et al.·Dec 13, 2016SaveLearn
A local fermion update algorithm for SYM quantum mechanicsWe present a local fermion update algorithm for N=4 supersymmetric Yang-Mills quantum mechanics which allows simulations in fixed canonical sectors. We discuss some aspects of the physics of this…Georg Bergner, Hang Liu, Urs Wenger·Dec 13, 2016SaveLearn
Towards a theoretical description of dense QCDThe properties of matter at finite baryon densities play an important role for the astrophysics of compact stars as well as for heavy ion collisions or the description of nuclear matter. Because of…Owe Philipsen·Dec 11, 2016SaveLearn
Locations of Roberge-Weiss transition endpoints in lattice QCD with Nf=2 improved KS quarksResult on the locations of the tricritical points of Nf=2 lattice QCD with imaginary chemical potential is presented. Simulations are carried out with Symanzik improved gauge action and Asqtad…Liang-Kai Wu, Xiang-Fei Meng·Dec 11, 2016SaveLearn
The ρ-meson light-cone distribution amplitudes from lattice QCDWe present the results of a lattice study of the normalization constants and second moments of the light-cone distribution amplitudes of longitudinally and transversely polarized ρ mesons. The…Vladimir M. Braun, Peter C. Bruns, Sara Collins et al.·Dec 9, 2016SaveLearn
Including heavy spin effects in the prediction of a b b u d tetraquark with lattice QCD potentialsWe investigate spin effects in four-quark systems consisting of two heavy anti-bottom quarks and two light up/down quarks. To this end we use the Born-Oppenheimer approximation. We utilize potentials…Pedro Bicudo, Jonas Scheunert, Marc Wagner·Dec 8, 2016SaveLearn