Comment on "Fractional topological charges and the lowest Dirac modes"We comment on a recent article published in Phys. Rev. D98 (2018) no.9, 094513, arXiv:1811.09029, pointing out severe problems in the numerical investigation leading to questionable results and…Derar Altarawneh, Roman Höllwieser·Dec 30, 2018SaveLearn
Path optimization method with use of neural network for the sign problem in field theoriesWe investigate the sign problem in field theories by using the path optimization method with use of the neural network. For theories with the sign problem, integral in the complexified variable space…Akira Ohnishi, Yuto Mori, Kouji Kashiwa·Dec 30, 2018SaveLearn
Improving the Kinetic Couplings in Lattice Non-Relativistic QCDWe improve the non-relativistic QCD (NRQCD) action by comparing the dispersion relation to that of the continuum through O(p6) in perturbation theory. The one-loop matching coefficients…Christine T. H. Davies, Judd Harrison, Ciaran Hughes et al.·Dec 30, 2018SaveLearn
Scattering length from BS wave function inside the interaction rangeWe evaluate I=2 two-pion scattering length through the scattering amplitude obtained by the Bethe-Salpeter wave function inside the interaction range. The scattering length is computed with $mπ=…Y. Namekawa, T. Yamazaki·Dec 30, 2018SaveLearn
Lattice QCD and nuclear physics for searches of physics beyond the Standard ModelLow-energy tests of fundamental symmetries are extremely sensitive probes of physics beyond the Standard Model, reaching scales that are comparable, if not higher, than directly accessible at the…Emanuele Mereghetti·Dec 28, 2018SaveLearn
Lattice QCD Impact on Determination of the CKM MatrixWe review many lattice QCD calculations that impact the precise determination of the CKM matrix. We focus on decay constants and semileptonic form factors of both light (π and K) and heavy-light…Steven Gottlieb·Dec 28, 2018SaveLearn
Quark-photon vertex from lattice QCD in Landau gaugeWe study the nonperturbative structure of the quark-photon vertex in Landau gauge. To this end, we utilize lattice QCD data for the vector current for two mass-degenerate quark flavours and extract…Milena Leutnant, André Sternbeck·Dec 28, 2018SaveLearn
Symmetries and Interactions from Lattice QCDPrecision experimental tests of the Standard Model of particle physics (SM) are one of our best hopes for discovering what new physics lies beyond the SM (BSM). Key in the search for new physics is…A. Nicholson, E. Berkowitz, H. Monge-Camacho et al.·Dec 28, 2018SaveLearn
QED-corrected Lellouch-Lüscher formula for K → ππ decayA precise SM prediction for the direct CP violation in the K → ππ decay process is of great importance in confronting experiments and constraining new physics. The state-of-art lattice…Yiming Cai, Zohreh Davoudi·Dec 28, 2018SaveLearn
Lattice study of supersymmetry breaking in N=2 supersymmetric quantum mechanicsWe study supersymmetry breaking from a lattice model of N=2 supersymmetric quantum mechanics using the direct computational method proposed in arXiv:1803.07960. The vanishing Witten index is realized…Daisuke Kadoh, Katsumasa Nakayama·Dec 27, 2018SaveLearn
Proton and neutron electromagnetic form factors from lattice QCDThe electromagnetic form factors of the proton and the neutron are computed within lattice QCD using simulations with quarks masses fixed to their physical values. Both connected and disconnected…C. Alexandrou, S. Bacchio, M. Constantinou et al.·Dec 26, 2018SaveLearn
Systematics in nucleon matrix element calculationsThe current status of calculations of simple nucleon structure observables is reviewed, with a focus on the axial charge. A major challenge is the combination of an exponentially decaying…Jeremy Green·Dec 26, 2018SaveLearn
Irregular parameter dependence of numerical results in tensor renormalization group analysisWe study the parameter dependence of numerical results obtained by the tensor renormalization group. We often observe an irregular behavior as the parameters are varied with the method, which makes…Daisuke Kadoh, Yoshinobu Kuramashi, Ryoichiro Ueno·Dec 26, 2018SaveLearn
Form factors of two-hadron states from a covariant finite-volume formalismIn this work we develop a Lorentz-covariant version of the previously derived formalism for relating finite-volume matrix elements to 2 + J 2 transition amplitudes. We…Alessandro Baroni, Raúl A. Briceño, Maxwell T. Hansen et al.·Dec 26, 2018SaveLearn
QED self energies from lattice QCD without power-law finite-volume errorsUsing the infinite-volume photon propagator, we developed a method which allows us to calculate electromagnetic corrections to stable hadron masses with only exponentially suppressed finite-volume…Xu Feng, Luchang Jin·Dec 24, 2018SaveLearn
Isospin breaking corrections to the HVP at the physical pointA determination of the hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon from lattice QCD aiming at a precision of 1\% requires to include isospin breaking…Vera Gülpers, Andreas Jüttner, Christoph Lehner et al.·Dec 22, 2018SaveLearn
Proton decay matrix element on the lattice with physical pion massProton decay is one of possible signatures of baryon number violation, which has to exist to explain the baryon asymmetry and the existence of nuclear matter. Proton decays must be mediated through…Jun-Sik Yoo, Yasumichi Aoki, Taku Izubuchi et al.·Dec 21, 2018SaveLearn
Nπ-state contamination in lattice calculations of the nucleon axial form factorsThe nucleon-pion-state contribution to QCD two-point and three-point functions used in lattice calculations of the nucleon axial form factors are studied in chiral perturbation theory. For small…Oliver Bar·Dec 21, 2018SaveLearn
Topological susceptibility and η' meson mass from Nf=2 lattice QCD at the physical pointIn this paper we explore the computation of topological susceptibility and η' meson mass in Nf=2 flavor QCD using lattice techniques with physical value of the pion mass as well as larger…Petros Dimopoulos, Christopher Helmes, Christian Jost et al.·Dec 20, 2018SaveLearn
SU(3)-breaking ratios for D(s) and B(s) mesonsWe present results for the SU(3) breaking ratios of decay constants fDs/fD and fBs/fB and - for the first time with physical pion masses - the ratio of bag parameters…Peter A Boyle, Luigi Del Debbio, Nicolas Garron et al.·Dec 20, 2018SaveLearn
Consistency between Lüscher's finite volume method and HAL QCD method for two-baryon systems in lattice QCDThere exist two methods to study two-baryon systems in lattice QCD: the direct method which extracts eigenenergies from the plateaux of the temporal correlator and the HAL QCD method which extracts…Takumi Iritani, Sinya Aoki, Takumi Doi et al.·Dec 20, 2018SaveLearn
Finite-density gauge correlation functions in QC2D2-color QCD is the simplest QCD-like theory which is accessible to lattice simulations at finite density. It therefore plays an important role to test qualitative features and to provide benchmarks…Tamer Boz, Ouraman Hajizadeh, Axel Maas et al.·Dec 20, 2018SaveLearn
Nucleon generalized form factors from two-flavor lattice QCDWe determine the generalized form factors, which correspond to the second Mellin moment (i.e., the first x-moment) of the generalized parton distributions of the nucleon at leading twist. The…Gunnar S. Bali, Sara Collins, Meinulf Göckeler et al.·Dec 19, 2018SaveLearn
Chiral crossover in QCD at zero and non-zero chemical potentialsWe present results for pseudo-critical temperatures of QCD chiral crossovers at zero and non-zero values of baryon (B), strangeness (S), electric charge (Q), and isospin (I) chemical…A. Bazavov, H. -T. Ding, P. Hegde et al.·Dec 19, 2018SaveLearn
Hadronic spectrum calculations in the quark-gluon plasmaA status report on FASTSUM's programme of computing spectral quantities in thermal QCD, using anisotropic lattice simulations with Nf=2+1 flavours of Wilson fermions, is given. We provide in…Gert Aarts, Chris Allton, Jonas Glesaaen et al.·Dec 19, 2018SaveLearn