Complex Paths Around The Sign ProblemThe Monte Carlo evaluation of path integrals is one of a few general purpose methods to approach strongly coupled systems. It is used in all branches of Physics, from QCD/nuclear physics to the…Andrei Alexandru, Gokce Basar, Paulo F. Bedaque et al.·Jul 10, 2020SaveLearn
The SU(3) spin model with chemical potential by series expansion techniquesThe SU(3) spin model with chemical potential corresponds to a simplified version of QCD with static quarks in the strong coupling regime. It has been studied previously as a testing ground for new…Jangho Kim, Anh Quang Pham, Owe Philipsen et al.·Jul 8, 2020SaveLearn
Path optimization for U(1) gauge theory with complexified parametersIn this article, we apply the path optimization method to handle the complexified parameters in the 1+1 dimensional pure U(1) gauge theory on the lattice. Complexified parameters make it possible…Kouji Kashiwa, Yuto Mori·Jul 8, 2020SaveLearn
Myth of scattering in finite volumeIn this notes, we illustrate why the infinite volume scattering amplitude is in fact dispensable when it comes to formulating few-body quantization condition in finite volume. Only subprocess…Peng Guo·Jul 8, 2020SaveLearn
Properties of the QCD thermal transition with Nf=2+1 flavours of Wilson quarkWe study properties of the thermal transition in QCD, using anisotropic, fixed-scale lattice simulations with Nf = 2+1 flavours of Wilson fermion. Observables are compared for two values of the…G. Aarts, C. Allton, J. Glesaaen et al.·Jul 8, 2020SaveLearn
Spectral functions and dynamic critical behavior of relativistic Z2 theoriesWe investigate the dynamic critical behaviour of a relativistic scalar field theory with Z2 symmetry by calculating spectral functions of the order parameter at zero and non-vanishing momenta from…Dominik Schweitzer, Sören Schlichting, Lorenz von Smekal·Jul 7, 2020SaveLearn
Ab-initio calculation of the proton and the neutron's scalar couplings for new physics searchesMany low-energy, particle-physics experiments seek to reveal new fundamental physics by searching for very rare scattering events on atomic nuclei. The interpretation of their results requires…Sz. Borsanyi, Z. Fodor, C. Hoelbling et al.·Jul 7, 2020SaveLearn
Multi-level Monte Carlo computation of the hadronic vacuum polarization contribution to (gμ-2)The hadronic contribution to the muon anomalous magnetic moment aμ=(gμ-2)/2 has to be determined at the per-mille level for the Standard Model prediction to match the expected final…Mattia Dalla Brida, Leonardo Giusti, Tim Harris et al.·Jul 6, 2020SaveLearn
Notes on lattice observables for parton distributions: nongauge theoriesWe review recent theoretical developments concerning the definition and the renormalization of equal-time correlators that can be computed on the lattice and related to Parton Distribution Functions…Luigi Del Debbio, Tommaso Giani, Christopher J. Monahan·Jul 4, 2020SaveLearn
Lattice QCD evaluation of the Compton amplitude employing the Feynman-Hellmann theoremThe forward Compton amplitude describes the process of virtual photon scattering from a hadron and provides an essential ingredient for the understanding of hadron structure. As a physical amplitude,…K. U. Can, A. Hannaford-Gunn, R. Horsley et al.·Jul 3, 2020SaveLearn
Hadronic vacuum polarization using gradient flowThe gradient-flow operator product expansion for QCD current correlators including operators up to mass dimension four is calculated through NNLO. This paves an alternative way for efficient lattice…Robert V. Harlander, Fabian Lange, Tobias Neumann·Jul 2, 2020SaveLearn
The role of boundary conditions in quantum computations of scattering observablesQuantum computing may offer the opportunity to simulate strongly-interacting field theories, such as quantum chromodynamics, with physical time evolution. This would give access to…Raúl A. Briceño, Juan V. Guerrero, Maxwell T. Hansen et al.·Jul 1, 2020SaveLearn
Stealth dark matter confinement transition and gravitational wavesWe use non-perturbative lattice calculations to investigate the finite-temperature confinement transition of stealth dark matter, focusing on the regime in which this early-universe transition is…R. C. Brower, K. Cushman, G. T. Fleming et al.·Jun 29, 2020SaveLearn
Hadronic light-by-light contribution to (g-2)μ from lattice QCD with SU(3) flavor symmetryWe perform a lattice QCD calculation of the hadronic light-by-light contribution to (g-2)μ at the SU(3) flavor-symmetric point mπ=mK 420\,MeV. The representation used is based on…En-Hung Chao, Antoine Gérardin, Jeremy R. Green et al.·Jun 29, 2020SaveLearn
Radial Lattice Quantization of 3D φ4 Field TheoryThe quantum extension of classical finite elements, referred to as quantum finite elements ( QFE)~Brower:2018szu,Brower:2016vsl, is applied to the radial quantization of 3d φ4…Richard C. Brower, George T. Fleming, Andrew D. Gasbarro et al.·Jun 28, 2020SaveLearn
Asymptotic low-temperature critical behavior of two-dimensional multiflavor lattice SO(Nc) gauge theoriesWe address the interplay between global and local gauge nonabelian symmetries in lattice gauge theories with multicomponent scalar fields. We consider two-dimensional lattice scalar nonabelian gauge…Claudio Bonati, Alessio Franchi, Andrea Pelissetto et al.·Jun 26, 2020SaveLearn
Double parton distributions in the pion from lattice QCDWe perform a lattice study of double parton distributions in the pion, using the relationship between their Mellin moments and pion matrix elements of two local currents. A good statistical signal is…Gunnar S. Bali, Luca Castagnini, Markus Diehl et al.·Jun 26, 2020SaveLearn
A lattice investigation of exotic tetraquark channelsWe perform an nf=2+1 lattice study of a number of channels where past claims exist in the literature for the existence of strong-interaction-stable light-heavy tetraquarks. We find no evidence for…R. J. Hudspith, B. Colquhoun, A. Francis et al.·Jun 25, 2020SaveLearn
I=1/2 S-wave and P-wave Kπ scattering and the and K* resonances from lattice QCDWe present a lattice-QCD determination of the elastic isospin-1/2 S-wave and P-wave Kπ scattering amplitudes as a function of the center-of-mass energy using L\"uscher's method. We perform…Gumaro Rendon, Luka Leskovec, Stefan Meinel et al.·Jun 24, 2020SaveLearn
The -resonance with physical pion mass from Nf=2 lattice QCDWe present the first-ever lattice computation of pi pi-scattering in the I=1 channel with Nf=2 dynamical quark flavours obtained including an ensemble with physical value of the pion mass. Employing…Matthias Fischer, Bartosz Kostrzewa, Maxim Mai et al.·Jun 24, 2020SaveLearn
Chiral phase structure of three flavor QCD in a background magnetic fieldWe investigate the chiral phase structure of three flavor QCD in a background U(1) magnetic field using the standard staggered action and the Wilson plaquette gauge action. We perform simulations…Heng-Tong Ding, Christian Schmidt, Akio Tomiya et al.·Jun 24, 2020SaveLearn
Topological defects and confinement with machine learning: the case of monopoles in compact electrodynamicsWe investigate the advantages of machine learning techniques to recognize the dynamics of topological objects in quantum field theories. We consider the compact U(1) gauge theory in three spacetime…M. N. Chernodub, Harold Erbin, V. A. Goy et al.·Jun 16, 2020SaveLearn
More on the three-gluon vertex in SU(2) Yang-Mills theory in three and four dimensionsThe three-gluon vertex has been found to be a vital ingredient in non-perturbative functional approaches. We present an updated lattice calculation of it in various kinematical configurations for all…Axel Maas, Milan Vujinović·Jun 15, 2020SaveLearn
Four quark operators for kaon bag parameter with gradient flowTo study the CP-violation using the K0-K0 oscillation, we need the kaon bag parameter which represents QCD corrections in the leading Feynman diagrams. The lattice QCD provides us with the…Asobu Suzuki, Yusuke Taniguchi, Hiroshi Suzuki et al.·Jun 12, 2020SaveLearn
Novel Approaches to Renormalization Group Transformations in the Continuum and on the LatticeThis thesis is about new methods of achieving RG transformations, in both a continuum spacetime background and on a lattice discretization thereof. The subject is explored from the point of view of…Andrea Carosso·Jun 12, 2020SaveLearn