Second Moment of the Pion Light-cone Distribution Amplitude from Lattice QCDWe present the results of a lattice study of the second moment of the light-cone pion distribution amplitude using two flavors of dynamical (clover) fermions on lattices of different volumes and pion…V. M. Braun, S. Collins, M. Göckeler et al.·Mar 12, 2015SaveLearn
A simple idea for Lattice QCD at finite densityWe pursue the idea of adding the naive μN term, where μ is the quark chemical potential and N is the conserved quark number, to the lattice QCD action. While computations of higher order…Rajiv V. Gavai, Sayantan Sharma·Mar 12, 2015SaveLearn
X(3872) and Y(4140) using diquark-antidiquark operators with lattice QCDWe perform a lattice study of charmonium-like mesons with JPC=1++ and three quark contents cc du, cc( uu+ dd) and cc ss, where the later two can mix…M. Padmanath, C. B. Lang, Sasa Prelovsek·Mar 11, 2015SaveLearn
Lambda Phenomena: the Lambda points of liquid Helium and chiral QCDThe superfluid transition of liquid Helium shares an interesting phenomenon with the chiral limit of QCD: the specific heat is finite at the critical point, but has a cusp. From this follows an…Sourendu Gupta, Rishi Sharma·Mar 11, 2015SaveLearn
ΩΩ interaction from 2+1 flavor lattice QCDWe investigate the interaction between Ω baryons in the 1S0 channel from 2+1 flavor lattice QCD simulations. On the basis of the HAL QCD method, the ΩΩ potential is extracted from the…Masanori Yamada, Kenji Sasaki, Sinya Aoki et al.·Mar 11, 2015SaveLearn
Gradient flow and scale setting on MILC HISQ ensemblesWe report on a scale determination with gradient-flow techniques on the Nf=2+1+1 highly improved staggered quark ensembles generated by the MILC Collaboration. The ensembles include four lattice…MILC Collaboration, A. Bazavov, C. Bernard et al.·Mar 10, 2015SaveLearn
Expanding the Interpolator Basis in the Variational Method to Explicitly Account for Backward Running StatesIn this paper, I show that backward (in time) running states can be explicitly accounted for by expanding the interpolator basis in the variational method in lattice QCD. The backward running states…Rainer W. Schiel·Mar 9, 2015SaveLearn
IR fixed points in SU(3) gauge TheoriesWe propose a novel RG method to specify the location of the IR fixed point in lattice gauge theories and apply it to the SU(3) gauge theories with Nf fundamental fermions. It is based on the…K. -I. Ishikawa, Y. Iwasaki, Yu Nakayama et al.·Mar 9, 2015SaveLearn
Low-energy Scattering of (D*D*) System and the Resonance-like Structure Zc(4025)In this paper, low-energy scattering of the (D*D*) meson system is studied within Lüscher's finite-size formalism using Nf=2 twisted mass gauge field configurations. With…Ying Chen, Ming Gong, Yu-Hong Lei et al.·Mar 9, 2015SaveLearn
Domain-Wall Fermion with R5 SymmetryWe present the domain-wall fermion operator which is reflection symmetric in the fifth dimension, with the approximate sign function S(H) of the effective 4-dimensional Dirac operator satisfying…Ting-Wai Chiu·Mar 5, 2015SaveLearn
Long-distance contributions to flavour-changing processesStandard lattice calculations in flavour physics or in studies of hadronic structure are based on the evaluation of matrix elements of local composite operators between hadronic states or the vacuum.…C. Sachrajda·Mar 5, 2015SaveLearn
Λb p - ν and Λb Λc - ν form factors from lattice QCD with relativistic heavy quarksMeasurements of the Λb p - ν and Λb Λc - ν decay rates can be used to determine the magnitudes of the CKM matrix elements Vub and Vcb, provided…William Detmold, Christoph Lehner, Stefan Meinel·Mar 4, 2015SaveLearn
The Yang-Mills vacuum wave functional thirty-five years laterThe first paper attempting direct calculation of the Yang-Mills vacuum wave functional was published by Greensite in 1979. I review some recent results of the determination of the vacuum wave…Stefan Olejnik·Mar 4, 2015SaveLearn
Recent results on topology on the lattice (in memory of Pierre van Baal)Memorizing Pierre van Baal we will shortly review his life and his scientific achievements. Starting then with some basics in gauge field topology we mainly will discuss recent efforts in determining…Michael Muller-Preussker·Mar 4, 2015SaveLearn
The running coupling of 8 flavors and 3 colorsWe compute the renormalized running coupling of SU(3) gauge theory coupled to Nf = 8 flavors of massless fundamental Dirac fermions. The recently proposed finite volume gradient flow scheme is used.…Zoltan Fodor, Kieran Holland, Julius Kuti et al.·Mar 3, 2015SaveLearn
Charge Symmetry Violation in the Electromagnetic Form Factors of the ProtonExperimental tests of QCD through its predictions for the strange-quark content of the proton have been drastically restricted by our lack of knowledge of the violation of charge symmetry (CSV). We…P. E. Shanahan, R. Horsley, Y. Nakamura et al.·Mar 3, 2015SaveLearn
Complex Langevin method applied to the 2D SU(2) Yang-Mills theoryThe complex Langevin method in conjunction with the gauge cooling is applied to the two-dimensional lattice SU(2) Yang-Mills theory that is analytically solvable. We obtain strong numerical…Hiroki Makino, Hiroshi Suzuki, Daisuke Takeda·Mar 2, 2015SaveLearn
The density of states approach for the simulation of finite density quantum field theoriesFinite density quantum field theories have evaded first principle Monte-Carlo simulations due to the notorious sign-problem. The partition function of such theories appears as the Fourier transform…K. Langfeld, B. Lucini, A. Rago et al.·Mar 2, 2015SaveLearn
Gauge-invariant signatures of spontaneous gauge symmetry breaking by the Hosotani mechanismThe Hosotani mechanism claims to achieve gauge-symmetry breaking, for instance SU(3) SU(2)× U(1). To verify this claim, we propose to monitor the stability of a topological defect stable…Oscar Akerlund, Philippe de Forcrand·Mar 2, 2015SaveLearn
Numerical results for gauge theories near the conformal windowA novel strong interaction beyond the standard model could provide a dynamical explanation of electroweak symmetry breaking. Experimental results strongly constrain properties of models that realise…Biagio Lucini·Mar 1, 2015SaveLearn
Approaching SU(2) gauge dynamics with smeared Z(2) vorticesWe present a method to smear (center projected) Z(2) vortices in lattice gauge configurations such as to embed vortex physics into a full SU(2) gauge configuration framework. In particular, we…Roman Höllwieser, Michael Engelhardt·Feb 27, 2015SaveLearn
Phases of SU(3) Gauge Theories with Fundamental Quarks via Dirac Spectral DensityWe propose that, in SU(3) gauge theories with fundamental quarks, confinement can be inferred from spectral density of the Dirac operator. This stems from the proposition that its possible behaviors…Andrei Alexandru, Ivan Horváth·Feb 26, 2015SaveLearn
Overlap Quark Propagator in Coulomb Gauge QCD and the Interrelation of Confinement and Chiral Symmetry BreakingThe chirally symmetric overlap quark propagator is explored in Coulomb gauge for the first time. This gauge is especially well suited for studying the interrelation between confinement and chiral…M. Pak, M. Schröck·Feb 26, 2015SaveLearn
Non-perturbative improvement and renormalization of the axial current in Nf=3 lattice QCDWe report on a non-perturbative computation of the renormalization factor ZA of the axial vector current in three-flavour O(a) improved lattice QCD with Wilson quarks and tree-level Symanzik…John Bulava, Michele Della Morte, Jochen Heitger et al.·Feb 26, 2015SaveLearn
Evidence that centre vortices underpin dynamical chiral symmetry breaking in SU(3) gauge theoryThe link between dynamical chiral symmetry breaking and centre vortices in the gauge fields of pure SU(3) gauge theory is studied using the overlap-fermion quark propagator in Lattice QCD.…Amalie Trewartha, Waseem Kamleh, Derek Leinweber·Feb 24, 2015SaveLearn