Isospin Effects by Mass ReweightingMost of today's lattice simulations are performed in the isospin symmetric limit of the light quark sector. Mass reweighting is a technique to include effects of isospin breaking in the sea…Jacob Finkenrath, Francesco Knechtli, Björn Leder·Jan 26, 2015SaveLearn
Tuning of the strange quark mass with optimal reweightingQuark mass reweighting can be used to tune the mass of dynamical quarks. The basic idea is to use gauge field ensembles generated at some bare mass parameters to evaluate observables at different…Björn Leder, Jacob Finkenrath·Jan 26, 2015SaveLearn
Baryon spectrum in the composite sextet modelThe strongly coupled near-conformal gauge theory with two fermion flavors in the two-index symmetric (sextet) representation of SU(3) is potentially a minimal realization of the composite Higgs…Zoltan Fodor, Kieran Holland, Julius Kuti et al.·Jan 26, 2015SaveLearn
Scalar correlators near the 3-flavor thermal critical pointWe investigate screening masses at both sides of the first order finite temperature transition with 3 quark flavors using the nonperturbatively improved clover fermion action and the Iwasaki gauge…Xiao-Yong Jin, Yoshinobu Kuramashi, Yoshifumi Nakamura et al.·Jan 26, 2015SaveLearn
Instantons and MonopolesThis study is part of a research program aimed to investigate the relations between instantons, monopoles, and chiral symmetry breaking. Monopoles are important 3-dimensional topological…Adriano Di Giacomo, Masayasu Hasegawa·Jan 26, 2015SaveLearn
Pion electric polarizability from lattice QCDElectromagnetic polarizabilities are important parameters for understanding the interaction between photons and hadrons. For pions these quantities are poorly constrained experimentally since they…Andrei Alexandru, Michael Lujan, Walter Freeman et al.·Jan 26, 2015SaveLearn
Condensation phenomena in two-flavor scalar QED at finite chemical potentialWe study condensation in two-flavored, scalar QED with non-degenerate masses at finite chemical potential. The conventional formulation of the theory has a sign problem at finite density which can be…Alexander Schmidt, Philippe de Forcrand, Christof Gattringer·Jan 26, 2015SaveLearn
Multipoint reweighting method and beta functions for the calculation of QCD equation of stateWe study a reweighting method aiming at numerical studies of QCD at finite density, in which the conventional Monte-Carlo method cannot be applied directly. One of the most important problems in the…Ryo Iwami, S. Ejiri, K. Kanaya et al.·Jan 26, 2015SaveLearn
Using NSPT for the Removal of Hypercubic Lattice ArtifactsThe treatment of hypercubic lattice artifacts is essential for the calculation of non-perturbative renormalization constants of RI-MOM schemes. It has been shown that for the RI'-MOM scheme a…Jakob Simeth, Andre Sternbeck, Meinulf Gockeler et al.·Jan 26, 2015SaveLearn
Comparative study of topological chargeComparative study of topological charge is performed. Topological charges are measured by a cloverleaf operator on smoothed gauge configurations. Various types of smoothing techniques are employed.…Yusuke Namekawa·Jan 26, 2015SaveLearn
Magnetic monopole and confinement/deconfinement phase transition in SU(3) Yang-Mills theoryWe have proposed the non-Abelian dual superconductivity in SU(3) Yang-Mills theory for the mechanism of quark confinement,and we presented the numerical evidences in preceding lattice conferences by…Akihiro Shibata, Kei-Ichi Kondo, Seikou Kato et al.·Jan 26, 2015SaveLearn
Spectroscopy of SU(4) gauge theory with two flavors of sextet fermionsWe present a first look at the spectroscopy of SU(4) gauge theory coupled to two flavors of Dirac fermions in the two-index antisymmetric representation, which is a real representation. We compute…Thomas DeGrand, Yuzhi Liu, Ethan T. Neil et al.·Jan 22, 2015SaveLearn
B π ν and Bs K ν form factors and |Vub| from 2+1-flavor lattice QCD with domain-wall light quarks and relativistic heavy quarksWe calculate the B πν and Bs K ν form factors in dynamical lattice QCD. We use the (2+1)-flavor RBC-UKQCD gauge-field ensembles generated with the domain-wall fermion and Iwasaki…J. M. Flynn, T. Izubuchi, T. Kawanai et al.·Jan 22, 2015SaveLearn
A lattice study of a chirally invariant Higgs-Yukawa model including a higher dimensional Φ6-termWe discuss the non-thermal phase structure of a chirally invariant Higgs-Yukawa model on the lattice in the presence of a higher dimensional Φ6-term. For the exploration of the phase diagram we…David Y. -J. Chu, Karl Jansen, Bastian Knippschild et al.·Jan 22, 2015SaveLearn
Locally smeared operator product expansions in scalar field theoryWe propose a new locally smeared operator product expansion to decompose nonlocal operators in terms of a basis of smeared operators. The smeared operator product expansion formally connects…Christopher Monahan, Kostas Orginos·Jan 21, 2015SaveLearn
Leading-order hadronic contributions to the electron and tau anomalous magnetic momentsThe leading hadronic contributions to the anomalous magnetic moments of the electron and the τ-lepton are determined by a four-flavour lattice QCD computation with twisted mass fermions. The…Florian Burger, Karl Jansen, Marcus Petschlies et al.·Jan 21, 2015SaveLearn
A better conditioned Domain Wall OperatorA variation of the Domain Wall operator with an additional parameter alpha will be introduced. The conditioning of the new Domain Wall operator depends on alpha, whereas the corresponding 4D…Hartmut Neff·Jan 20, 2015SaveLearn
Universal formula for the energy--momentum tensor via a flow equation in the Gross--Neveu modelFor the fermion field in the two-dimensional Gross--Neveu model, we introduce a flow equation that allows a simple 1/N expansion. By employing the 1/N expansion, we examine the validity of a…Hiroshi Suzuki·Jan 19, 2015SaveLearn
Kenneth Wilson and lattice QCDWe discuss the physics and computation of lattice QCD, a space-time lattice formulation of quantum chromodynamics, and Kenneth Wilson's seminal role in its development. We start with the…Akira Ukawa·Jan 17, 2015SaveLearn
First moment of the flavour octet nucleon parton distribution function using lattice QCDWe perform a lattice computation of the flavour octet contribution to the average quark momentum in a nucleon, x(8)μ2 = 4 2. In particular, we fully take the disconnected…C. Alexandrou, M. Constantinou, S. Dinter et al.·Jan 15, 2015SaveLearn
Non-perturbative Heavy Quark Effective Theory: An application to semi-leptonic B-decaysWe review a lattice strategy how to non-perturbatively determine the coefficients in the HQET expansion of all components of the heavy-light axial and vector currents, including 1/mh-corrections. We…Michele Della Morte, Jochen Heitger, Hubert Simma et al.·Jan 14, 2015SaveLearn
Testing the Standard Model under the weight of heavy flavorsI review recently completed (since Lattice 2013) and ongoing lattice calculations in charm and bottom flavor physics. A comparison of the precision of lattice and experiment is made using both…C. M. Bouchard·Jan 13, 2015SaveLearn
Non-perturbative Heavy Quark Effective Theory: Introduction and StatusWe give an introduction to Heavy Quark Effective Theory (HQET). Our emphasis is on its formulation non-perturbative in the strong coupling, including the non-perturbative determination of the…Rainer Sommer·Jan 13, 2015SaveLearn
Hadron Wavefunctions as a Probe of a Two Color Baryonic MediumThe properties of the ground state of two-color QCD at non-zero baryon chemical potential μ present an interesting problem in strongly-interacting gauge theory; in particular the nature of the…Alessandro Amato, Pietro Giudice, Simon Hands·Jan 13, 2015SaveLearn
A Mixed Action Analysis of η and η' MesonsWe study η and η' mesons and their mixing angle in a mixed action approach with so-called Osterwalder-Seiler valence quarks on a Wilson twisted mass sea. The gauge configurations have been…Konstantin Ottnad, Carsten Urbach, Falk Zimmermann·Jan 12, 2015SaveLearn