Three-body Unitarity in the Finite VolumeThe physical interpretation of lattice QCD simulations, performed in a small volume, requires an extrapolation to the infinite volume. A method is proposed to perform such an extrapolation for three…M. Mai, M. Döring·Sep 24, 2017SaveLearn
An numerical approach for finite volume three-body interactionIn present work, we study an numerical approach to one dimensional finite volume three-body interaction, the method is demonstrated by considering a toy model of three spinless particles interacting…Peng Guo, Vladimir Gasparian·Sep 24, 2017SaveLearn
Thermal quarkonium physics in the pseudoscalar channelThe pseudoscalar correlator is an ideal lattice probe for thermal modifications to quarkonium spectra, given that it is not compromised by a contribution from a large transport peak. We construct a…Y. Burnier, H. -T. Ding, O. Kaczmarek et al.·Sep 22, 2017SaveLearn
Massive Schwinger model at finite θUsing the approach developed in [V. Azcoiti, G. Di Carlo, A. Galante, V. Laliena, Phys. Lett. B563, (2003) 117], we are able to reconstruct the behavior of the massive 1-flavor…Vicente Azcoiti, Giuseppe Di Carlo, Eduardo Follana et al.·Sep 22, 2017SaveLearn
Progress in computing parton distribution functions from the quasi-PDF approachWe discuss the current developments by the European Twisted Mass Collaboration in extracting parton distribution functions from the quasi-PDF approach. We concentrate on the non-perturbative…Constantia Alexandrou, Krzysztof Cichy, Martha Constantinou et al.·Sep 21, 2017SaveLearn
The running coupling from gluon and ghost propagators in the Landau gauge: Yang-Mills theories with adjoint fermionsNon-Abelian gauge theories with fermions transforming in the adjoint representation of the gauge group (AdjQCD) are a fundamental ingredient of many models that describe the physics beyond the…Georg Bergner, Stefano Piemonte·Sep 21, 2017SaveLearn
Topological susceptibility from twisted mass fermions using spectral projectors and the gradient flowWe compare lattice QCD determinations of topological susceptibility using a gluonic definition from the gradient flow and a fermionic definition from the spectral projector method. We use ensembles…Constantia Alexandrou, Andreas Athenodorou, Krzysztof Cichy et al.·Sep 19, 2017SaveLearn
Modifying partition functions: a way to solve the sign problemA possible method to solve the sign problem is developed by modifying the original theory. Considering several modifications of the partition function, the observable in the original theory is…Takahiro M. Doi, Shoichiro Tsutsui·Sep 18, 2017SaveLearn
Chiral Transition of SU(4) Gauge Theory with Fermions in Multiple RepresentationsWe report preliminary results on the finite temperature behavior of SU(4) gauge theory with dynamical quarks in both the fundamental and two-index antisymmetric representations. This system is a…Venkitesh Ayyar, Thomas DeGrand, Daniel C. Hackett et al.·Sep 18, 2017SaveLearn
Topology in the 2d Heisenberg Model under Gradient FlowThe 2d Heisenberg model --- or 2d O(3) model --- is popular in condensed matter physics, and in particle physics as a toy model for QCD. Along with other analogies, it shares with 4d Yang-Mills…Ilya O. Sandoval, Wolfgang Bietenholz, Philippe de Forcrand et al.·Sep 18, 2017SaveLearn
Generating a non-perturbative mass gap using Feynman diagrams in an asymptotically free theoryUsing the example of a two dimensional four-fermion lattice field theory we demonstrate that Feynman diagrams can generate a mass gap when massless fermions interact via a marginally relevant…Venkitesh Ayyar, Shailesh Chandrasekharan·Sep 18, 2017SaveLearn
Relating Quark Confinement and Chiral Symmetry Breaking in QCDWe study the relation between quark confinement and chiral symmetry breaking in QCD. Using lattice QCD formalism, we analytically express the various "confinement indicators", such as the…Hideo Suganuma, Takahiro M. Doi, Krzysztof Redlich et al.·Sep 15, 2017SaveLearn
Non-perturbatively gauge-fixed compact U(1) lattice gauge theoryAn extensive study of the compact U(1) lattice gauge theory with a higher derivative gauge-fixing term and a suitable counter-term has been undertaken to determine the nature of the possible…Asit K. De, Mugdha Sarkar·Sep 14, 2017SaveLearn
Kramers-Wannier duality and worldline representation for the SU(2) principal chiral modelIn this letter we explore different representations of the SU(2) principal chiral model on the lattice. We couple chemical potentials to two of the conserved charges to induce finite density. This…Christof Gattringer, Daniel Göschl, Carlotta Marchis·Sep 14, 2017SaveLearn
Pion distribution amplitude from Euclidean correlation functionsFollowing the proposal in [1], we study the feasibility to calculate the pion distribution amplitude (DA) from suitably chosen Euclidean correlation functions at large momentum. In our lattice study…Gunnar S. Bali, Vladimir M. Braun, Benjamin Gläßle et al.·Sep 13, 2017SaveLearn
Dual simulation of the massless lattice Schwinger model with topological term and non-zero chemical potentialWe discuss simulation strategies for the massless lattice Schwinger model with a topological term and finite chemical potential. The simulation is done in a dual representation where the complex…Daniel Göschl·Sep 13, 2017SaveLearn
Application of neural network to sign problem via path optimization methodWe introduce the feedforward neural network to attack the sign problem via the path optimization method. The variables of integration is complexified and the integration path is optimized in the…Yuto Mori, Kouji Kashiwa, Akira Ohnishi·Sep 11, 2017SaveLearn
Fermion bag approach to Hamiltonian lattice field theories in continuous timeWe extend the idea of fermion bags to Hamiltonian lattice field theories in the continuous time formulation. Using a class of models we argue that the temperature is a parameter that splits the…Emilie Huffman, Shailesh Chandrasekharan·Sep 11, 2017SaveLearn
b b u d four-quark systems in the Born-Oppenheimer approximation: prospects and challengesWe summarize previous work on b bud four-quark systems in the Born-Oppenheimer approximation and discuss first steps towards an extension to the theoretically more challenging $b b…Antje Peters, Pedro Bicudo, Marc Wagner·Sep 11, 2017SaveLearn
Pion and ρ-meson screening masses at finite chemical potential in two-flavor lattice QCD with Wilson fermionWe investigate the real and imaginary chemical-potential dependence of pion and ρ-meson screening masses in both the confinement and the deconfinement region by using two-flavor lattice QCD. The…Junpei Sugano, Junichi Takahashi, Hiroaki Kouno et al.·Sep 7, 2017SaveLearn
The Casimir effect and deconfinement phase transitionWe show that the Casimir effect may lead to a deconfinement phase transition induced by the presence of boundaries in confining gauge theories. Using first-principle numerical simulations we…M. N. Chernodub, V. A. Goy, A. V. Molochkov·Sep 7, 2017SaveLearn
Distribution law of the Dirac eigenmodes in QCDThe near-zero modes of the Dirac operator are connected to spontaneous breaking of chiral symmetry in QCD (SBCS) via the Banks-Casher relation. At the same time the distribution of the near-zero…M. Catillo, L. Ya. Glozman·Sep 6, 2017SaveLearn
Optimization of the Brillouin operator on the KNL architectureExperiences with optimizing the matrix-times-vector application of the Brillouin operator on the Intel KNL processor are reported. Without adjustments to the memory layout, performance figures of 360…Stephan Durr·Sep 6, 2017SaveLearn
Deep Learning Beyond Lefschetz ThimblesThe generalized thimble method to treat field theories with sign problems requires repeatedly solving the computationally-expensive holomorphic flow equations. We present a machine learning technique…Andrei Alexandru, Paulo Bedaque, Henry Lamm et al.·Sep 6, 2017SaveLearn
Tetraquark operators in lattice QCD and exotic flavour states in the charm sectorWe present a general class of operators resembling compact tetraquarks which have a range of colour-flavour-spin structures, transform irreducibly under the symmetries of the lattice and respect…Gavin K. C. Cheung, Christopher E. Thomas, Jozef J. Dudek et al.·Sep 5, 2017SaveLearn