Strong CP problem, electric dipole moment, and fate of the axionThree hard problems! In this talk I investigate the long-distance properties of quantum chromodynamics in the presence of a topological theta term. This is done on the lattice, using the gradient…Gerrit Schierholz·Jan 30, 2022SaveLearn
Complex Langevin simulations for PT-symmetric modelsSelf-interacting scalar quantum field theories possessing PT-symmetry are physically admissible since their energy spectrum is real and bounded below. However, models with PT-invariant potentials…Arpith Kumar, Anosh Joseph·Jan 28, 2022SaveLearn
Scaled Affine Quantization of 44 in the Low Temperature LimitWe prove through Monte Carlo analysis that the covariant euclidean scalar field theory, rn, where r denotes the power of the interaction term and n = s + 1 where s is the spatial…Riccardo Fantoni, John R. Klauder·Jan 28, 2022SaveLearn
Nucleon isovector tensor charge from lattice QCD with physical light quarksWe present preliminary results for the axial, scalar and tensor charges of the nucleon measured in 2+1 flavor QCD with the physical light quarks (mπ=135 MeV). Our simulations are carried out…Ryutaro Tsuji, Yasumichi Aoki, Ken-Ichi Ishikawa et al.·Jan 27, 2022SaveLearn
Measurements of SU(3)f symmetry breaking in B meson decay constantsWe present updates from QCDSF/UKQCD/CSSM on the SU(3)f breaking in B meson decay constants. The b-quarks are generated with an anisotropic clover-improved action, and are tuned to match…S. A. De La Motte, S. E. Hollitt, R. Horsley et al.·Jan 26, 2022SaveLearn
A novel nonperturbative renormalization scheme for local operatorsThe gradient flow exponentially suppresses ultraviolet field fluctuations and removes ultraviolet divergences (up to a multiplicative fermionic wavefunction renormalization). It can be used to…Anna Hasenfratz, Christopher J. Monahan, Matthew D. Rizik et al.·Jan 24, 2022SaveLearn
Implementing noise reduction techniques into theOpenQ*D packageWe present the results of testing a new technique for stochastic noise reduction in the calculation of propagators by implementing it in OpenQ*D for two ensembles with O(a) improved Wilson fermion…Lucius Bushnaq, Isabel Campos, Marco Catillo et al.·Jan 24, 2022SaveLearn
Digitising SU(2) Gauge Fields and the Freezing TransitionEfficient discretisations of gauge groups are crucial with the long term perspective of using tensor networks or quantum computers for lattice gauge theory simulations. For any Lie group other than…Tobias Hartung, Timo Jakobs, Karl Jansen et al.·Jan 24, 2022SaveLearn
Self-dual U(1) lattice field theory with a θ-termWe study U(1) gauge theories with a modified Villain action. Such theories can naturally be coupled to electric and magnetic matter, and display exact electric-magnetic duality. In their simplest…Mariia Anosova, Christof Gattringer, Tin Sulejmanpasic·Jan 24, 2022SaveLearn
Long and short distance behavior of the imaginary part of the heavy-quark potentialThe imaginary part of the effective heavy-quark potential is related to the total in-medium decay width of heavy quark-antiquark bound states. We extract the static limit of this quantity using…Kirill Boguslavski, Babak Kasmaei, Michael Strickland·Jan 23, 2022SaveLearn
Pion and Kaon Distribution Amplitudes from Lattice QCDWe present the state-of-the-art lattice QCD calculation of the pion and kaon light-cone distribution amplitudes (DAs) using large-momentum effective theory. The calculation is done at three lattice…Jun Hua, Min-Huan Chu, Jin-Chen He et al.·Jan 23, 2022SaveLearn
Performance of the GPU inverters with Chroma+QUDA for various fermion actionsWe present our progress on the Chroma interfaces of the twisted-mass, HISQ (highly improved staggered quark) and overlap fermion inverters using QUDA.Kuan Zhang, Wei Sun, Yi-Bo Yang et al.·Jan 22, 2022SaveLearn
Stochastic normalizing flows as non-equilibrium transformationsNormalizing flows are a class of deep generative models that provide a promising route to sample lattice field theories more efficiently than conventional Monte Carlo simulations. In this work we…Michele Caselle, Elia Cellini, Alessandro Nada et al.·Jan 21, 2022SaveLearn
Non-perturbative phase structure of the bosonic BMN matrix modelWe study the bosonic part of the BMN matrix model for wide ranges of temperatures, values of the deformation parameter, and numbers of colors 16 ≤ N ≤ 48. Using lattice computations, we…Navdeep Singh Dhindsa, Raghav G. Jha, Anosh Joseph et al.·Jan 21, 2022SaveLearn
Investigations of supersymmetric Yang--Mills theoriesWe present new results from ongoing lattice investigations of supersymmetric Yang--Mills (SYM) theories in three and four space-time dimensions. First considering the maximally supersymmetric 3d…Angel Sherletov, David Schaich·Jan 21, 2022SaveLearn
Effective electroweak Hamiltonian in the gradient-flow formalismThe effective electroweak Hamiltonian in the gradient-flow formalism is constructed for the current-current operators through next-to-next-to-leading order QCD. The results are presented for two…Robert V. Harlander, Fabian Lange·Jan 21, 2022SaveLearn
The Compton Amplitude, lattice QCD and the Feynman-Hellmann approachA major objective of lattice QCD is the computation of hadronic matrix elements. The standard method is to use three-point and four-point correlation functions. An alternative approach, requiring…K. U. Can, A. Hannaford-Gunn, R. Horsley et al.·Jan 20, 2022SaveLearn
New insight in the 2-flavor Schwinger model based on lattice simulationsWe consider the Schwinger model with two degenerate, light fermion flavors by means of lattice simulations. At finite temperature, we probe the viability of a bosonization method by Hosotani et al.…Jaime Fabián Nieto Castellanos, Wolfgang Bietenholz, Ivan Hip·Jan 20, 2022SaveLearn
Exploring Bosonic and Fermionic Link Models on (3+1)-d tubesQuantum link models (QLMs) have attracted a lot of attention in recent times as a generalization of Wilson's lattice gauge theories (LGT), and are particularly suitable for realization on quantum…Debasish Banerjee, Emilie Huffman, Lukas Rammelmüller·Jan 18, 2022SaveLearn
Proton generalized parton distributions from lattice QCDMomentum and spatial distributions of quarks and gluons inside hadrons are typically encoded in the so-called generalized parton distributions (GPDs). GPDs are multi-dimensional quantities that are…Aurora Scapellato, Constantia Alexandrou, Krzysztof Cichy et al.·Jan 17, 2022SaveLearn
Leading order mesonic and baryonic SU(3) low energy constants from Nf = 3 lattice QCDWe determine the leading order mesonic~(B0 and F0) and baryonic~(m0, D and F) SU(3) chiral perturbation theory low energy constants from lattice QCD. We employ gauge ensembles with…Gunnar S. Bali, Sara Collins, Wolfgang Söldner et al.·Jan 14, 2022SaveLearn
Low energy constant and mixed-action effectWe present the pion mass and decay constant using the overlap fermion valence on domain wall (DW) fermion sea at several lattice spacings. The mixed action effect in the lattice calculation is also…Dian-Jun Zhao, Yi-Bo Yang·Jan 13, 2022SaveLearn
Nonabelian lattice theories: Consistent measures and strataThe role of consistent measures in the rigorous construction of nonabelian lattice theories is analized. General conditions that measures must fulfill to insure consistency, positivity and a mass gap…R. Vilela Mendes·Jan 12, 2022SaveLearn
The Difference between the Longitudinal and Transverse Gluon Propagators as an Indicator of the Postconfinement DomainWe study numerically the dependence of the difference between the longitudinal and transverse gluon propagators, =DL-DT, on the momentum and temperature at T Tc both in SU(2) and…V. G. Bornyakov, N. V. Gerasimeniuk, V. A. Goy et al.·Jan 12, 2022SaveLearn
Novel Algorithms for Computing Correlation Functions of NucleiThe computational cost required to calculate nuclear correlation functions grows factorially in the number of quarks, making the study of large nuclei inaccessible to ab initio study using lattice…Nabil Humphrey, William Detmold, Ross D. Young et al.·Jan 12, 2022SaveLearn