Low-Energy QCD in the Delta RegimeWe investigate properties of low-energy QCD in a finite spatial volume, but with arbitrary temperature. In the limit of small temperature and small cube size compared to the pion Compton wavelength,…Matthew E. Matzelle, Brian C. Tiburzi·Dec 16, 2015SaveLearn
Introductory lectures on lattice QCD at nonzero baryon numberThese lecture notes contain an elementary introduction to lattice QCD at nonzero chemical potential. Topics discussed include chemical potential in the continuum and on the lattice; the sign, overlap…Gert Aarts·Dec 16, 2015SaveLearn
An Improved Single-Plaquette Gauge ActionWe describe and test a nonperturbatively improved single-plaquette lattice action for 4-d SU(2) and SU(3) pure gauge theory, which suppresses large fluctuations of the plaquette, without requiring…Debasish Banerjee, Michael Bögli, Kieran Holland et al.·Dec 15, 2015SaveLearn
Using Wilson flow to study the SU(3) deconfinement transitionWe explore the use of Wilson flow to study the deconfinement transition in SU(3) gauge theory. We use the flowed Polyakov loop as a renormalized order parameter for the transition, and use it to…Saumen Datta, Sourendu Gupta, Andrew Lytle·Dec 15, 2015SaveLearn
Towards Lattice QCD Baryon Forces at the Physical Point: First ResultsLattice QCD calculations of baryon forces are performed for the first time with (almost) physical quark masses. Nf = 2+1 dynamical clover fermion gauge configurations are generated at the lattice…Takumi Doi, Sinya Aoki, Shinya Gongyo et al.·Dec 14, 2015SaveLearn
Renormalization constants of the lattice energy momentum tensor using the gradient flowWe employ a new strategy for a non perturbative determination of the renormalized energy momentum tensor. The strategy is based on the definition of suitable lattice Ward identities probed by…Francesco Capponi, Luigi Del Debbio, Agostino Patella et al.·Dec 14, 2015SaveLearn
Selected results on hadron structure using state-of-the-art lattice QCD simulationsWe review progress on hadron structure using lattice QCD simulations at or near to physical values of the QCD parameters. In particular, we discuss recent results on hadron masses, the nucleon…Constantia Alexandrou·Dec 12, 2015SaveLearn
Abelian monopole or non-Abelian monopole responsible for quark confinementWe have pointed out that the SU(3) Yang-Mills theory has a new way of reformulation using new field variables (minimal option), in addition to the conventional option adopted by Cho, Faddeev and…Akihiro Shibata, Kei-Ichi Kondo, Seikou Kato et al.·Dec 11, 2015SaveLearn
Dyons near the transition temperature in lattice QCDWe study the topological structure of QCD by cluster analysis. The fermionic topological charge density is constructed from low lying modes of overlap Dirac operator for three types of temporal…V. G. Bornyakov, E. -M. Ilgenfritz, B. V. Martemyanov et al.·Dec 10, 2015SaveLearn
Grid: A next generation data parallel C++ QCD libraryIn this proceedings we discuss the motivation, implementation details, and performance of a new physics code base called Grid. It is intended to be more performant, more general, but similar in…Peter Boyle, Azusa Yamaguchi, Guido Cossu et al.·Dec 10, 2015SaveLearn
An estimate of the hadronic vacuum polarization disconnected contribution to the anomalous magnetic moment of the muon from lattice QCDThe quark-line disconnected diagram is a potentially important ingredient in lattice QCD calculations of the hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon. It…Bipasha Chakraborty, C. T. H. Davies, J. Koponen et al.·Dec 10, 2015SaveLearn
No evidence for bilinear condensate in parity-invariant three-dimensional QED with massless fermionsWe present our numerical study of three-dimensional QED with 2, 4, 6 and 8 flavors of massless two-component fermions using a parity-preserving lattice regularization with Wilson fermions. We study…Nikhil Karthik, Rajamani Narayanan·Dec 9, 2015SaveLearn
Gradient Flow Coupling in the SU(2) gauge theory with two adjoint fermionsWe study SU(2) gauge theory with two fermion flavors in the adjoint representation. Using a clover improved HEX smeared action and the gradient flow running coupling allows us to simulate with larger…Jarno Rantaharju·Dec 9, 2015SaveLearn
Renormalisation of the energy-momentum tensor in scalar field theory using the Wilson flowA non-perturbative renormalisation prescription for the energy-momentum tensor, based on space-time symmetries along the Wilson flow, has been proposed recently in the context of 4-dimensional gauge…Francesco Capponi, Luigi Del Debbio, Susanne Ehret et al.·Dec 9, 2015SaveLearn
Finite-volume Hamiltonian method for ππ scattering in lattice QCDWithin a formulation of ππ scattering, we investigate the use of the finite-volume Hamiltonian approach to resolving scattering observables from lattice QCD spectra. We consider spectra in the…Jia-Jun Wu, T. -S. Harry Lee, Derek B. Leinweber et al.·Dec 9, 2015SaveLearn
Nonperturbative Renormalization in the RI-SMOM Scheme and Gribov Uncertainty in the RI-MOM Scheme for Staggered BilinearsWe present results of renormalization factors for bilinear operators obtained using the nonperturbative renormalization method (NPR) in the RI-SMOM schemes. The operators are constructed using HYP…Jangho Kim, Weonjong Lee, Jeonghwan Pak et al.·Dec 8, 2015SaveLearn
CP violation and Kaon weak matrix elements from Lattice QCDIn this short review, I present the recent lattice computations of kaon weak matrix elements relevant to K ππ decays and neutral kaon mixing. These matrix elements are key to the theoretical…Nicolas Garron·Dec 8, 2015SaveLearn
Understanding the problem with logarithmic singularities in the complex Langevin methodIn recent years, there has been remarkable progress in theoretical justification of the complex Langevin method, which is a promising method for evading the sign problem in the path integral with a…Jun Nishimura, Shinji Shimasaki·Dec 8, 2015SaveLearn
Light-cone distribution amplitudes of the baryon octetWe present results of the first ab initio lattice QCD calculation of the normalization constants and first moments of the leading twist distribution amplitudes of the full baryon octet, corresponding…Gunnar S. Bali, Vladimir M. Braun, Meinulf Göckeler et al.·Dec 7, 2015SaveLearn
Large-scale computation of the exponentially expanding universe in a simplified Lorentzian type IIB matrix modelThe type IIB matrix model is a conjectured nonperturbative formulation of superstring theory. Recent studies on the Lorentzian version of the model have shown that only three out of nine spatial…Yuta Ito, Jun Nishimura, Asato Tsuchiya·Dec 7, 2015SaveLearn
Effective action for the Abelian-Higgs model for a gauge-invariant implementation on optical latticesWe present a gauge-invariant effective action for the Abelian-Higgs model in 1+1 dimensions. It is constructed by integrating out the gauge field and then using the hopping parameter expansion. The…Alexei Bazavov, Yannick Meurice, Shan-Wen Tsai et al.·Dec 6, 2015SaveLearn
First results of baryon interactions from lattice QCD with physical masses (1) -- General overview and two-nucleon forces --We present the lattice QCD studies for baryon-baryon interactions for the first time with (almost) physical quark masses. Nf = 2+1 gauge configurations are generated with the Iwasaki gauge action…Takumi Doi, Sinya Aoki, Shinya Gongyo et al.·Dec 5, 2015SaveLearn
θ dependence in SU(3) Yang-Mills theory from analytic continuationWe investigate the topological properties of the SU(3) pure gauge theory by performing numerical simulations at imaginary values of the θ parameter. By monitoring the dependence of various…Claudio Bonati, Massimo D'Elia, Aurora Scapellato·Dec 4, 2015SaveLearn
Optimizing the domain wall fermion Dirac operator using the R-Stream source-to-source compilerThe application of the Dirac operator on a spinor field, the Dslash operation, is the most computation-intensive part of the lattice QCD simulations. It is often the key kernel to optimize to achieve…Meifeng Lin, Eric Papenhausen, M. Harper Langston et al.·Dec 4, 2015SaveLearn
Unphysical phases in staggered chiral perturbation theoryWe study the phase diagram for staggered quarks using chiral perturbation theory. In beyond-the-standard-model simulations using a large number (>8) of staggered fermions, unphysical phases appear…Christopher Aubin, Katrina Colletti, George Davila·Dec 3, 2015SaveLearn