Electroweak box diagrams on the lattice for pion and neutron decayCKM matrix is unitary by construction in the standard model(SM). The recent analyses on the first row of CKM matrix show ≈ 3σ tension with unitarity. Nonperturbative calculations of the…Jun-Sik Yoo, Tanmoy Bhattacharya, Rajan Gupta et al.·Dec 24, 2022SaveLearn
D-meson semileptonic decays to pseudoscalars from four-flavor lattice QCDWe present lattice-QCD calculations of the hadronic form factors for the semileptonic decays Dπ, D K, and Ds K. Our calculation uses the highly improved…Alexei Bazavov, Carleton DeTar, Aida X. El-Khadra et al.·Dec 24, 2022SaveLearn
Unpolarized proton PDF at NNLO from lattice QCD with physical quark massesWe present a lattice QCD calculation of the unpolarized isovector quark parton distribution function (PDF) of the proton utilizing a perturbative matching at next-to-next-to-leading-order (NNLO). The…Xiang Gao, Andrew D. Hanlon, Jack Holligan et al.·Dec 23, 2022SaveLearn
Optimizing Staggered Multigrid for Exascale performanceAdaptive multi-grid methods have proven very successful in dealing with critical slow down for the Wilson-Dirac solver in lattice gauge theory. Multi-grid algorithms developed for Staggered fermions…Venkitesh Ayyar, Richard Brower, M. A. Clark et al.·Dec 23, 2022SaveLearn
Lattice calculation of the R-ratio smeared with Gaussian kernelThe ratio R(E) of the cross-sections for e+e- hadrons and e+e- μ+μ- is a valuable energy-dependent probe of the hadronic sector of the Standard Model. Moreover, the experimental…Constantia Alexandrou, Simone Bacchio, Alessandro De Santis et al.·Dec 23, 2022SaveLearn
Implications of gradient flow on the static forceWe use gradient flow to compute the static force based on a Wilson loop with a chromoelectric field insertion. The result can be compared on one hand to the static force from the numerical derivative…Nora Brambilla, Viljami Leino, Julian Mayer-Steudte et al.·Dec 23, 2022SaveLearn
Study of charm and beauty in QGP from unquenched lattice QCDWe present charmonium and bottomonium correlators and corresponding reconstructed spectral functions from full QCD calculations in the pseudoscalar channel. Correlators are obtained using a…Sajid Ali, Dibyendu Bala, Olaf Kaczmarek et al.·Dec 23, 2022SaveLearn
Low energy effective theories on the lattice with coloured noiseLow energy effective theories give access to regimes of the QCD phase diagram that to date are hard to simulate directly with lattice QCD or with functional approaches. For lattice QCD this includes…Felipe Attanasio, Jan Philipp Klinger, Jan M. Pawlowski·Dec 23, 2022SaveLearn
Study of Hadron Masses with Faddeev-Popov Eigenmode Projection in the Coulomb GaugeUsing SU(3) lattice QCD, we investigate role of spatial gluons for hadron masses in the Coulomb gauge, considering the relation between QCD and the quark model. From the Coulomb-gauge configurations…Hiroki Ohata, Hideo Suganuma·Dec 23, 2022SaveLearn
Calculating the QED correction to the hadronic vacuum polarisation on the latticeIsospin-breaking corrections to the hadron vacuum polarization component of the anomalous magnetic moment of the muon are needed to ensure the theoretical precision of gμ -2 is below the…Gaurav Ray, Alexei Bazavov, Christine Davies et al.·Dec 22, 2022SaveLearn
Complex Langevin boundary terms in full QCDLattice simulations of non-zero density QCD introduce the so-called sign problem (complex or negative probabilities), which invalidates importance sampling methods. To circumvent this, we use the…Michael W. Hansen, Dénes Sexty·Dec 22, 2022SaveLearn
Novel Bottomonium ResultsWe present the latest results from the use of the Backus-Gilbert method for reconstructing the spectra of NRQCD bottomonium mesons using anisotropic FASTSUM ensembles at non-zero temperature. We…Ben Page, Chris Allton, Seyong Kim·Dec 22, 2022SaveLearn
General kinematics of the three-gluon vertex from quenched lattice QCDWe present new results for the transversely projected three-gluon vertex from quenched lattice QCD simulations using standard Wilson action. While previous works focused in some particular kinematics…Fernando Pinto-Gómez, Feliciano de Soto, Mauricio N. Ferreira et al.·Dec 22, 2022SaveLearn
The pion-nucleon sigma term with Nf=2+1 O(a)-improved Wilson fermionsWe present an analysis of the pion-nucleon sigma term on the CLS ensembles with Nf=2+1 flavors of O(a)-improved Wilson fermions. We perform a chiral interpolation based on ensembles…Andria Agadjanov, Dalibor Djukanovic, Georg von Hippel et al.·Dec 22, 2022SaveLearn
Metadynamics Surfing on Topology Barriers in the Schwinger ModelTopological freezing is a well known problem in lattice simulations: with shrinking lattice spacing a transition between topological sectors becomes increasingly improbable, leading to a problematic…Christian Hoelbling, Timo Eichhorn, Philip Rouenhoff et al.·Dec 22, 2022SaveLearn
Supersphere non-linear sigma model on the latticeTwo-dimensional O(N) non-linear sigma models are exactly solvable theories and have many applications, from statistical mechanics to their use as QCD toy models. We consider a supersymmetric…Ilaria Costa, Valentina Forini, Ben Hoare et al.·Dec 22, 2022SaveLearn
Curved domain-wall fermion and its anomaly inflowWe investigate the effect of U (1) gauge field on lattice fermion systems with a curved domain-wall mass term. In the same way as the conventional flat domain-wall fermion, the chiral edge modes…Shoto Aoki, Hidenori Fukaya·Dec 22, 2022SaveLearn
Hadronic vacuum polarization with C* boundary conditionsWe present a progress report on the calculation of the connected hadronic contribution to the muon g-2 with C* boundary conditions. For that purpose we use a QCD gauge ensemble with 3+1 flavors and…Anian Altherr, Roman Gruber, Lucius Bushnaq et al.·Dec 22, 2022SaveLearn
Photon production rate from Transverse-Longitudinal (T-L) mesonic correlator on the latticeThermal photons from the QGP provide important information about the interaction among plasma constituents. The photon production rate from a thermally equilibrated system is proportional to the…Dibyendu Bala, Sajid Ali, Anthony Francis et al.·Dec 22, 2022SaveLearn
(Semi)leptonic kaon decays and neutral kaon mixing from lattice QCDWe review recent progress on leptonic and semileptonic kaon decays and neutral kaon mixing from lattice QCD.Takashi Kaneko·Dec 22, 2022SaveLearn
Gluon PDF for the proton using the twisted mass formulation of lattice QCDWe present results of the x-dependence of the unpolarized gluon PDF for the proton. We use an Nf=2+1+1 ensemble of maximally twisted mass fermions with clover improvement and the Iwasaki improved…Joseph Delmar, Constantia Alexandrou, Krzysztof Cichy et al.·Dec 21, 2022SaveLearn
Toward Exploring Phase Diagrams of Gauge Theories on Quantum Computers with Thermal Pure Quantum StatesAiming at evading the notorious sign problem in classical Monte-Carlo approaches to lattice quantum chromodynamics, we present an approach for quantum computing finite-temperature lattice gauge…Zohreh Davoudi, Niklas Mueller, Connor Powers·Dec 21, 2022SaveLearn
Use of Schwinger-Dyson equation in constructing an approximate trivializing mapWe construct an approximate trivializing map by using a Schwinger-Dyson equation. The advantage of this method is that: (1) The basis for the flow kernel can be chosen arbitrarily by hand. (2) It can…Peter Boyle, Taku Izubuchi, Luchang Jin et al.·Dec 21, 2022SaveLearn
Towards Quantum Monte Carlo Simulations at non-zero Baryon and Isospin Density in the Strong Coupling RegimeThe Hamiltonian formulation of Lattice QCD with staggered fermions in the strong coupling limit has no sign problem at non-zero baryon density and allows for Quantum Monte Carlo simulations. We have…Pratitee Pattanaik, Wolfgang Unger·Dec 21, 2022SaveLearn
Numerical Stochastic Perturbation Theory around instantonsNumerical Stochastic Perturbation Theory (NSPT) has over the years proved to be a valuable tool, in particular being able to reach unprecedented orders for Lattice Gauge Theories, whose perturbative…Paolo Baglioni, Francesco Di Renzo·Dec 21, 2022SaveLearn