Lattice simulations of the QCD chiral transition at real μBMost lattice studies of hot and dense QCD matter rely on extrapolation from zero or imaginary chemical potentials. The ill-posedness of numerical analytic continuation puts severe limitations on the…Attila Pasztor, Szabolcs Borsanyi, Zoltan Fodor et al.·Jan 3, 2022SaveLearn
Instanton effects on chiral symmetry breaking and hadron spectroscopyThis project aims to give indications to find monopole and instanton effects in QCD on the observables by experiments. First, we add the monopole and anti-monopole to the QCD vacuum of the quenched…Masayasu Hasegawa·Jan 2, 2022SaveLearn
Nucleon isovector momentum fraction, helicity and transversity moment using Lattice QCDWe present our recent high precision calculations (Phys. Rev. D102 (2020) no.5, 054512 and JHEP 04 (2021) 044, JHEP 21 (2020) 004) of the first moment of nucleon isovector polarized, unpolarized and…Santanu Mondal, Tanmoy Bhattacharya, Rajan Gupta et al.·Dec 31, 2021SaveLearn
Machine Learning Trivializing Maps: A First Step Towards Understanding How Flow-Based Samplers Scale UpA trivializing map is a field transformation whose Jacobian determinant exactly cancels the interaction terms in the action, providing a representation of the theory in terms of a deterministic…Luigi Del Debbio, Joe Marsh Rossney, Michael Wilson·Dec 31, 2021SaveLearn
Critical exponents for a spin-charge flip symmetric fixed point in 2+1d with massless Dirac fermionsIn the Hamiltonian picture, free spin-1/2 Dirac fermions on a bipartite lattice have an O(4) (spin-charge) symmetry. Here we construct an interacting lattice model with an interaction V, which…Emilie Huffman·Dec 31, 2021SaveLearn
Approach to K '+ '- decay width on latticeLattice QCD plays an increasing role in reducing theoretical uncertainties in kaon decays. Here we focus on kaon decay channels K '+ '-, which are closely related to…Xin-Yu Tuo·Dec 31, 2021SaveLearn
Critical behavior towards the chiral limit at vanishing and non-vanishing chemical potentialsWe study the scaling behavior of the (2+1)-flavor QCD crossover region towards the chiral limit with smaller-than-physical light quark mass gauge ensembles, generated using the HISQ fermion…Olaf Kaczmarek, Frithjof Karsch, Anirban Lahiri et al.·Dec 31, 2021SaveLearn
A new phase in the Lorentzian type IIB matrix model and the emergence of continuous space-timeThe Lorentzian type IIB matrix model is a promising candidate for a non-perturbative formulation of superstring theory. In previous studies, Monte Carlo calculations provided interesting results…Mitsuaki Hirasawa, Konstantinos Anagnostopoulos, Takehiro Azuma et al.·Dec 31, 2021SaveLearn
Relationship between the Euclidean and Lorentzian versions of the type IIB matrix modelThe type IIB matrix model was proposed as a non-perturbative formulation of superstring theory in 1996. We simulate a model that describes the late time behavior of the IIB matrix model by applying…Kohta Hatakeyama, Konstantinos Anagnostopoulos, Takehiro Azuma et al.·Dec 31, 2021SaveLearn
The lower moments of nucleon structure functions in lattice QCD with physical quark massesWe present results for the nucleon structure functions and form factors obtained from 2+1 flavor lattice QCD with physical light quark masses (mπ=135 MeV) in a large spatial extent of about 10…Ryutaro Tsuji, Yasumichi Aoki, Ken-Ichi Ishikawa et al.·Dec 31, 2021SaveLearn
Finite-volume effects and meson scattering in the 2-flavour Schwinger modelWe investigate the 2-flavour Schwinger model in the canonical formulation with fixed fermion numbers. We use Wilson fermions and a formalism which describes the determinant of the Dirac operator in…Patrick Bühlmann, Urs Wenger·Dec 30, 2021SaveLearn
Normalizing flows for the real-time sign problemWe discuss the application of normalizing flows to bosonic lattice field theories with real-time sign problems. A normalizing flow, once it is found for such a lattice field theory, is guaranteed to…Yukari Yamauchi, Scott Lawrence·Dec 30, 2021SaveLearn
Real-Time Dynamics at Large NThe large-N limit of O(N)-symmetric bosonic field theories, or U(N)-symmetric fermionic field theories, is amenable to a saddle point approximation. As a result, there is a family of closely…Scott Lawrence·Dec 30, 2021SaveLearn
Lattice QCD calculation of the two-photon exchange contribution to the muonic-hydrogen Lamb shiftWe develop a method for lattice QCD calculation of the two-photon exchange (TPE) contribution to the muonic-hydrogen Lamb shift. To demonstrate the feasibility of this method, we also present an…Yang Fu·Dec 30, 2021SaveLearn
Fast and flexible implementations of Wilson, Brillouin and Susskind fermions in lattice QCDA modern Fortran implementation of three Dirac operators (Wilson, Brillouin, Susskind) in lattice QCD is presented, based on OpenMP shared-memory parallelization and SIMD pragmas. The main idea is to…Stephan Durr·Dec 29, 2021SaveLearn
Towards robust constraints on nuclear effective field theory from lattice QCDWe will discuss several new results from the NPLQCD Collaboration that combine lattice QCD results on (hyper)nuclear systems at unphysical pion masses together with nuclear effective field theories.…Marc Illa·Dec 28, 2021SaveLearn
B\!\!D(*) semileptonic decays in lattice QCD with domain-wall heavy quarksWe calculate the B D(*) form factors in 2+1 flavor relativistic lattice QCD by employing the M\"obius domain-wall action for all quark flavors. Our simulations are carried out at…T. Kaneko, Y. Aoki, B. Colquhoun et al.·Dec 27, 2021SaveLearn
Lattice fermions as spectral graphsWe study lattice fermions from the viewpoint of spectral graph theory (SGT). We find that a fermion defined on a certain lattice is identified as a spectral graph. SGT helps us investigate the number…Jun Yumoto, Tatsuhiro Misumi·Dec 27, 2021SaveLearn
Fifty ways to build a deuteron: a variational calculation of two-nucleon systemsA variational study of two-nucleon systems with lattice quantum chromodynamics is performed using a wide range of interpolating operators: dibaryon operators built from products of momentum-projected…Michael L. Wagman·Dec 27, 2021SaveLearn
Quark spin-orbit correlations in the protonGeneralized transverse momentum-dependent parton distributions (GTMDs) provide a comprehensive framework for imaging the internal structure of the proton. In particular, by encoding the simultaneous…M. Engelhardt, J. R. Green, N. Hasan et al.·Dec 26, 2021SaveLearn
Baryon masses from full QCD+QEDC simulationsIn these proceedings we present preliminary results for the masses of the proton, neutron and - baryons obtained from QCD+QED lattice simulations performed with four dynamical quarks using…Lucius Bushnaq, Isabel Campos, Marco Catillo et al.·Dec 23, 2021SaveLearn
Equivariance and generalization in neural networksThe crucial role played by the underlying symmetries of high energy physics and lattice field theories calls for the implementation of such symmetries in the neural network architectures that are…Srinath Bulusu, Matteo Favoni, Andreas Ipp et al.·Dec 23, 2021SaveLearn
Generalization capabilities of neural networks in lattice applicationsIn recent years, the use of machine learning has become increasingly popular in the context of lattice field theories. An essential element of such theories is represented by symmetries, whose…Srinath Bulusu, Matteo Favoni, Andreas Ipp et al.·Dec 23, 2021SaveLearn
The Higgs phase as a spin glass phase in D=5 dimensional SU(2) gauge Higgs theoryAccording to recent work of Greensite and Matsuyama, the Higgs phase of a gauge Higgs theory is distinguished from the confinement and massless phases by the spontaneous breaking of a global center…David Ward·Dec 22, 2021SaveLearn
A note on improved stochastic trace estimation for fermionic string fluctuationsWe report on the use of a stochastic trace estimator algorithm, based on mutually unbiased bases, for evaluating the trace of a matrix differential operator appearing in the context of lattice…Valentina Forini, Bjoern Leder, Nils Wauschkuhn·Dec 22, 2021SaveLearn