QCD mesonic screening masses up to high temperaturesWe discuss a strategy to study non-perturbatively QCD up to very high temperatures by Monte Carlo simulations on the lattice. It allows not only the thermodynamic properties of the theory but also…Mattia Dalla Brida, Leonardo Giusti, Tim Harris et al.·Nov 21, 2022SaveLearn
Localisation of Dirac eigenmodes and confinement in gauge theories: the Roberge-Weiss transitionAmple numerical evidence from lattice calculations shows a strong connection between the confining properties of gauge theories at finite temperature and the localisation properties of the low-lying…Marco Cardinali, Massimo D'Elia, Francesco Garosi et al.·Nov 21, 2022SaveLearn
The hadronic running of the electroweak couplings from lattice QCDThe energy dependency (running) of the strength of electromagnetic interactions α plays an important role in precision tests of the Standard Model. The running of the former to the Z pole is…Marco Cè, Antoine Gérardin, Georg von Hippel et al.·Nov 21, 2022SaveLearn
Simulating the Femtouniverse on a Quantum ComputerWe compute the low-lying spectrum of 4D SU(2) Yang-Mills in a finite volume using quantum simulations. In contrast to small-volume lattice truncations of the Hilbert space, we employ toroidal…Nouman Butt, Patrick Draper, Jiayu Shen·Nov 20, 2022SaveLearn
Kernel controlled real-time Complex Langevin simulationThis study explores the utility of a kernel in complex Langevin simulations of quantum real-time dynamics on the Schwinger-Keldysh contour. We give several examples where we use a systematic scheme…Daniel Alvestad, Rasmus Larsen, Alexander Rothkopf·Nov 19, 2022SaveLearn
Inverse problems, real-time dynamics and lattice simulationsThe determination of real-time dynamics of strongly coupled quantum fields is a central goal of modern nuclear and particle physics, which requires insight into quantum field theory beyond the…Alexander Rothkopf·Nov 19, 2022SaveLearn
Towards symmetric discretization schemes via weak boundary conditionsThe Szymanzik improvement program for gauge theories is most commonly implemented using forward finite difference corrections to the Wilson action. Central symmetric schemes naively applied, suffer…Alexander Rothkopf·Nov 19, 2022SaveLearn
The density of states method in Yang-Mills theories and first order phase transitionsExtensions of the standard model that lead to first-order phase transitions in the early universe can produce a stochastic background of gravitational waves, which may be accessible to future…David Mason, Biagio Lucini, Maurizio Piai et al.·Nov 18, 2022SaveLearn
Magnetic catalysis in the 1-flavor Gross-Neveu model in 2+1 dimensionsWe investigate the Gross-Neveu model in 2+1 dimensions in a constant and homogeneous magnetic field using one reducible flavor of overlap fermions. Our lattice simulations suggest that the magnetic…Michael Mandl, Julian J. Lenz, Andreas Wipf·Nov 18, 2022SaveLearn
Equation of state from complex Langevin simulationsWe use complex Langevin simulations to study the QCD phase diagram with two light quark flavours. In this study, we use Wilson fermions with an intermediate pion mass of 480\,MeV. By studying…Felipe Attanasio, Benjamin Jäger, Felix P. G. Ziegler·Nov 18, 2022SaveLearn
QCD confronts heavy-flavor and exotic hadronsA review of QCD-based theory approaches to study the heavy-flavor and exotic hadrons is given. The focus is on the results from lattice QCD and from lattice QCD complemented by effective field…Sasa Prelovsek·Nov 18, 2022SaveLearn
Three-particle Lellouch-L\"uscher formalism in moving framesA manifestly relativistic-invariant Lellouch-L\"uscher formalism for the three-particle decays is proposed. Similarly to ref.[1], the formalism is based on the use of the non-relativistic effective…Fabian Müller, Jin-Yi Pang, Akaki Rusetsky et al.·Nov 18, 2022SaveLearn
Meson screening mass at finite chemical potentialKnowledge of the screening masses at finite chemical potential can provide insight into the nature of the QCD phase diagram. However, lattice studies at finite chemical potential suffer from the…Rishabh Thakkar, Prasad Hegde·Nov 18, 2022SaveLearn
Multi-Representation Dynamics of SU(4) Composite Higgs Models: Chiral Limit and Spectral ReconstructionsWe present a lattice study of the SU(4) gauge theory with two Dirac fermions in the fundamental and two in the two-index antisymmetric representation, a model close to a theory of partial…Luigi Del Debbio, Alessandro Lupo, Marco Panero et al.·Nov 17, 2022SaveLearn
Composite dynamics in Sp(2N) gauge theoriesSp(2N) gauge theories with fermonic matter provide an ideal laboratory to build extensions of the standard model based on novel composite dynamics. Examples include composite Higgs along with top…Jong-Wan Lee, Ed Bennett, Deog Ki Hong et al.·Nov 16, 2022SaveLearn
Cellular automaton for spinor gravity in four dimensionsCertain fermionic quantum field theories are equivalent to probabilistic cellular automata, with fermionic occupation numbers associated to bits. We construct an automaton that represents a discrete…C. Wetterich·Nov 16, 2022SaveLearn
Semidefinite Programs at Finite Fermion DensitySemidefinite programs can be constructed to provide a non-perturbative view of the zero-temperature behavior of quantum systems. This paper examines the properties of these semidefinite programs when…Scott Lawrence·Nov 16, 2022SaveLearn
RG-running of the tensor currents for Nf =3 QCD in a SF setupWe present the preliminary results of the non-perturbative running of the flavour non-singlet tensor operator in the high-energy range 2~GeV μ 128~GeV in Nf=3…Isabel Campos Plasencia, Mattia Dalla Brida, Giulia Maria de Divitiis et al.·Nov 16, 2022SaveLearn
Phase structure and critical point in heavy-quark QCD at finite temperatureWe study phase structure and critical point of finite-temperature QCD in the heavy-quark region applying the hopping parameter expansion (HPE). We first study finite-size scaling on the critical…Kazuyuki Kanaya, Ryo Ashikawa, Shinji Ejiri et al.·Nov 16, 2022SaveLearn
Viscosity of pure-glue QCD from the latticeWe calculate shear viscosity and bulk viscosity in SU(3) gauge theory on the lattice at 1.5 \,Tc. The viscosities are extracted via a Kubo formula from the reconstructed spectral function which we…Luis Altenkort, Alexander M. Eller, Anthony Francis et al.·Nov 15, 2022SaveLearn
Aspects of scaling and scalability for flow-based sampling of lattice QCDRecent applications of machine-learned normalizing flows to sampling in lattice field theory suggest that such methods may be able to mitigate critical slowing down and topological freezing. However,…Ryan Abbott, Michael S. Albergo, Aleksandar Botev et al.·Nov 14, 2022SaveLearn
Four-dimensional domain decomposition for the factorization of the fermion determinantThe non-local dependence of the fermion determinant on the gauge field limits our ability of simulating Quantum Chromodynamics on the lattice. Here we present a factorization of the gauge field…Matteo Saccardi, Leonardo Giusti·Nov 13, 2022SaveLearn
Confinement-deconfinement transition in SU(3)-Higgs theoryWe study lattice cutoff effects on the confinement-deconfinement transition and the Z3 symmetry in SU(3)-Higgs theory in 3+1 dimensions. The Higgs in this study is a complex triplet with…Sanatan Digal, Vinod Mamale, Sabiar Shaikh·Nov 12, 2022SaveLearn
On the Infinite Variance Problem in Fermion ModelsMonte Carlo calculations of fermionic systems with continuous auxiliary fields frequently suffer from a diverging variance. If a system has the infinite variance problem, one cannot estimate…Andrei Alexandru, Paulo Bedaque, Andrea Carosso et al.·Nov 11, 2022SaveLearn
Multiple breaking patterns in the Brout-Englert-Higgs effect beyond perturbation theoryIn many BSM theories, especially GUTs, introducing a Brout-Englert-Higgs effect allows for multiple breaking patterns of the gauge symmetry. The possibility to select a particular pattern is usually…Elizabeth Dobson, Axel Maas, Bernd Riederer·Nov 10, 2022SaveLearn