Large volumes and spectroscopy of walking theoriesA detailed investigation of finite size effects is performed for SU(2) gauge theory with two fermions in the adjoint representation, which previous lattice studies have shown to be inside the…L. Del Debbio, B. Lucini, A. Patella et al.·Dec 27, 2015SaveLearn
Numerical Stochastic Perturbation Theory and Gradient Flow in ϕ4 TheoryIn this contribution we present an exploratory study of several novel methods for numerical stochastic perturbation theory. For the investigation we consider observables defined through the gradient…Mattia Dalla Brida, Marco Garofalo, Anthony D. Kennedy·Dec 27, 2015SaveLearn
The Lefschetz thimble and the sign problemIn this talk I review the proposal to formulate quantum field theories (QFTs) on a Lefschetz thimble, which was put forward to enable Monte Carlo simulations of lattice QFTs affected by sign problem.…Luigi Scorzato·Dec 25, 2015SaveLearn
Finite-volume effects in the muon anomalous magnetic moment on the latticeWe investigate finite-volume effects in the hadronic vacuum polarization, with an eye toward the corresponding systematic error in the muon anomalous magnetic moment. We consider both recent lattice…Christopher Aubin, Thomas Blum, Peter Chau et al.·Dec 23, 2015SaveLearn
A note on the Loop Formula for the fermionic determinantA formula expressing the fermionic determinant as an infinite product of smaller determinants is derived and discussed. These smaller determinants are of a fixed size, independent of the size of the…Erhard Seiler, Ion-Olimpiu Stamatescu·Dec 23, 2015SaveLearn
Roberge-Weiss transition in Nf=2 QCD with Wilson fermions and Nτ=6QCD with imaginary chemical potential is free of the sign problem and exhibits a rich phase structure constraining the phase diagram at real chemical potential. We simulate the critical endpoint of…Francesca Cuteri, Christopher Pinke, Alessandro Sciarra et al.·Dec 22, 2015SaveLearn
Charge transport and vector meson dissociation across the thermal phase transition in lattice QCD with two light quark flavorsWe compute and analyze correlation functions in the isovector vector channel at vanishing spatial momentum across the deconfinement phase transition in lattice QCD. The simulations are carried out at…Bastian B. Brandt, Anthony Francis, Benjamin Jaeger et al.·Dec 22, 2015SaveLearn
The light bound states of supersymmetric SU(2) Yang-Mills theorySupersymmetry provides a well-established theoretical framework for extensions of the standard model of particle physics and the general understanding of quantum field theories. We summarise here our…Georg Bergner, Pietro Giudice, Istvan Montvay et al.·Dec 22, 2015SaveLearn
Conserved Charge Fluctuations from Lattice QCD and the Beam Energy ScanWe discuss the next-to-leading order Taylor expansion of ratios of cumulants of net-baryon number fluctuations. We focus on the relation between the skewness ratio, SBσB = χ3B/χ1B, and the…F. Karsch, A. Bazavov, H. -T. Ding et al.·Dec 22, 2015SaveLearn
Lattice QCD on Non-Orientable ManifoldsA common problem in lattice QCD simulations on the torus is the extremely long autocorrelation time of the topological charge, when one approaches the continuum limit. The reason is the suppressed…Simon Mages, Balint C. Toth, Szabolcs Borsanyi et al.·Dec 21, 2015SaveLearn
Axion phenomenology and θ-dependence from Nf = 2+1 lattice QCDWe investigate the topological properties of Nf = 2+1 QCD with physical quark masses, both at zero and finite temperature. We adopt stout improved staggered fermions and explore a range of lattice…Claudio Bonati, Massimo D'Elia, Marco Mariti et al.·Dec 21, 2015SaveLearn
Dual representation for 1+1 dimensional fermions interacting with 3+1 dimensional U(1) gauge fieldsWe study a system of nanowires, i.e., the theory of 1+1 dimensional massless fermions interacting with 3+1 dimensional U(1) gauge fields. When allowing for non-zero chemical potentials, this system…Christof Gattringer, Vasily Sazonov·Dec 21, 2015SaveLearn
QCD at non-zero temperature from the latticeI review the status of lattice QCD calculations at non-zero temperature. After summarizing what is known about the equilibrium properties of strongly interacting matter, I discuss in more detail…Harvey B. Meyer·Dec 21, 2015SaveLearn
The pole structure of the Lambda(1405) in a recent QCD simulationThe Λ(1405) baryon is difficult to detect in experiment, absent in many quark model calculations, and supposedly manifested through a two-pole structure. Its uncommon properties made it subject to…R. Molina, M. Doring·Dec 18, 2015SaveLearn
Thimble regularization at work besides toy models: from Random Matrix Theory to Gauge TheoriesThimble regularization as a solution to the sign problem has been successfully put at work for a few toy models. Given the non trivial nature of the method (also from the algorithmic point of view)…G. Eruzzi, F. Di Renzo·Dec 18, 2015SaveLearn
Thimble regularization at work for Gauge Theories: from toy models onwardsA final goal for thimble regularization of lattice field theories is the application to lattice QCD and the study of its phase diagram. Gauge theories pose a number of conceptual and algorithmic…F. Di Renzo, G. Eruzzi·Dec 18, 2015SaveLearn
From Domain Wall to Overlap in 2+1dThe equivalence of domain wall and overlap fermion formulations is demonstrated for lattice gauge theories in 2+1 spacetime dimensions with parity-invariant mass terms. Even though the domain wall…Simon Hands·Dec 18, 2015SaveLearn
Study of QCD Phase Diagram with Non-Zero Chiral Chemical PotentialIn this paper we report on lattice simulations of SU(3)-QCD with non-zero chiral chemical potential. We focus on the influence of the chiral chemical potential on the confinement/deconfinement phase…V. V. Braguta, E. -M. Ilgenfritz, A. Yu. Kotov et al.·Dec 18, 2015SaveLearn
BKT phase transitions in two-dimensional non-Abelian spin modelsIt is argued that two-dimensional U(N) spin models for any N undergo a BKT-like phase transition, similarly to the famous XY model. This conclusion follows from the Berezinskii-like calculation of…Oleg Borisenko, Volodymyr Chelnokov, Francesca Cuteri et al.·Dec 17, 2015SaveLearn
Determining the scale in Lattice QCDWe discuss scale setting in the context of 2+1 dynamical fermion simulations where we approach the physical point in the quark mass plane keeping the average quark mass constant. We have simulations…V. G. Bornyakov, R. Horsley, R. Hudspith et al.·Dec 17, 2015SaveLearn
Lattice simulation of the SU(2) chiral model at zero and non-zero pion densityWe propose a flux representation based lattice formulation of the partition function corresponding to the SU(2) principal chiral Lagrangian, including a chemical potential and scalar/pseudo-scalar…Tobias Rindlisbacher, Philippe de Forcrand·Dec 17, 2015SaveLearn
Finite density O(3) non-linear sigma model and low energy physicsWe present lattice results for simulations of the O(3) non-linear sigma model at finite chemical potential. The complex action problem is overcome by a dual variable representation of the model. We…Falk Bruckmann, Christof Gattringer, Thomas Kloiber et al.·Dec 17, 2015SaveLearn
Equation of state for cold and dense heavy QCDA previously derived three-dimensional effective lattice theory describing the thermodynamics of QCD with heavy quarks in the cold and dense region is extended through order u5κ8 in the…Jonas Glesaaen, Mathias Neuman, Owe Philipsen·Dec 16, 2015SaveLearn
Neutral Kaon mixing beyond the Standard ModelWe compute the hadronic matrix elements of the four-quark operators needed for the study of K0- K0 mixing beyond the Standard Model. We have used nf=2+1 flavours of domain wall fermion…R. J. Hudspith, N. Garron, A. T. Lytle·Dec 16, 2015SaveLearn
In-medium quarkonium properties from a lattice QCD based effective field theoryIn order to understand the experimental data on heavy quarkonium production in heavy ion collisions at RHIC and LHC it is necessary (though not sufficient) to pinpoint the properties of heavy…Seyong Kim, Peter Petreczky, Alexander Rothkopf·Dec 16, 2015SaveLearn