Variational approach to N-body interactions in finite volumeWe explore variational approach to the finite-volume N-body problem. The general formalism for N non-relativistic spinless particles interacting with periodic pair-wise potentials yields N-body…Peng Guo, Michael Döring, Adam P. Szczepaniak·Oct 2, 2018SaveLearn
Three-particle systems with resonant subprocesses in a finite volumeIn previous work, we have developed a relativistic, model-independent three-particle quantization condition, but only under the assumption that no poles are present in the two-particle K matrices…Raúl A. Briceño, Maxwell T. Hansen, Stephen R. Sharpe·Oct 2, 2018SaveLearn
The Anderson transition in QCD with Nf=2+1+1 twisted mass quarks: overlap analysisChiral Random Matrix Theory has proven to describe the spectral properties of low temperature QCD very well. However, at temperatures above the chiral symmetry restoring transition it can not provide…Lukas Holicki, Ernst-Michael Ilgenfritz, Lorenz von Smekal·Oct 2, 2018SaveLearn
Simulations of SU(2) lattice gauge theory with dynamical reduced staggered fermionsWe simulate SU(2) lattice gauge theory using dynamical reduced staggered fermions. The latter lead to two rather than four Dirac fermions in the continuum limit. We review the derivation and…Simon Catterall, Nouman Butt·Oct 1, 2018SaveLearn
From the colour glass condensate to filamentation: Systematics of classical Yang-Mills theoryThe non-equilibrium early time evolution of an ultra-relativistic heavy ion collision is often described by classical lattice Yang-Mills theory, starting from the colour glass condensate (CGC)…Owe Philipsen, Björn Wagenbach, Savvas Zafeiropoulos·Oct 1, 2018SaveLearn
3-body quantization condition in a unitary formalismUnitarity identifies all power-law finite-volume effects and is, therefore, the crucial S-matrix principle for a mapping between experimental results and those of Lattice QCD calculations. In this…Maxim Mai·Oct 1, 2018SaveLearn
B- and D-meson leptonic decay constants and quark masses from four-flavor lattice QCDWe describe a recent lattice-QCD calculation of the leptonic decay constants of heavy-light pseudoscalar mesons containing charm and bottom quarks and of the masses of the up, down, strange, charm,…Fermilab Lattice, MILC, TUMQCD Collaborations et al.·Sep 29, 2018SaveLearn
Opposite-Parity Contaminations in Lattice Nucleon Form FactorsThe recently-introduced Parity Expanded Variational Analysis (PEVA) technique allows for the isolation of baryon eigenstates at finite momentum free from opposite-parity contamination. In this paper,…Finn M. Stokes, Waseem Kamleh, Derek B. Leinweber·Sep 28, 2018SaveLearn
Nucleon charges and quark momentum fraction with Nf=2+1 Wilson fermionsWe present a nucleon structure analysis including local isovector charges as well as twist-2 operator insertions. Computations are performed on CLS ensembles with Nf=2+1 Wilson fermions, covering…Konstantin Ottnad, Tim Harris, Harvey Meyer et al.·Sep 27, 2018SaveLearn
Light-Neutrino Exchange and Long-Distance Contributions to 02β Decays: An Exploratory Study on ππ eeWe present an exploratory lattice QCD calculation of the neutrinoless double beta decay ππ ee. Under the mechanism of light-neutrino exchange, the decay amplitude involves significant…Xu Feng, Lu-Chang Jin, Xin-Yu Tuo et al.·Sep 27, 2018SaveLearn
High-Temperature QCD: theory overviewWe review the recent progress achieved in the theoretical investigation of Quantum Chromodynamics in the high temperature regime, with a focus on results achieved by lattice QCD simulations. The…Massimo D'Elia·Sep 27, 2018SaveLearn
Hadron-Hadron Interactions from Nf=2+1+1 Lattice QCD: I=3/2 πK Scattering LengthIn this paper we report on results for the s-wave scattering length of the π-K system in the I=3/2 channel from Nf=2+1+1 Lattice QCD. The calculation is based on gauge configurations…Christopher Helmes, Christian Jost, Bastian Knippschild et al.·Sep 24, 2018SaveLearn
The quenched SU(2) adjoint scalar propagator in minimal Landau gaugeIt is a long-standing question whether the confinement of matter fields in QCD has an imprint in the (gauge-dependent) correlation functions, especially the propagators. In particular in the quenched…Axel Maas·Sep 21, 2018SaveLearn
Strange Nuclear Physics from QCD on LatticeWe study single-particle potential of Lambda, Sigma, and Xi hyperons in nucleonic matter starting from the fundamental theory of the strong interaction, QCD. First we carry out a lattice QCD…Takashi Inoue·Sep 21, 2018SaveLearn
Faddeev-Popov Matrix in Linear Covariant Gauge: First ResultsWe discuss a possible definition of the Faddeev-Popov matrix for the minimal linear covariant gauge on the lattice and present first results for the ghost propagator. We consider Yang-Mills theory in…Attilio Cucchieri, David Dudal, Tereza Mendes et al.·Sep 21, 2018SaveLearn
Recent progress on hadron spectroscopy from lattice QCDLattice QCD has matured to a degree where it is now possible to study excited hadrons as they truly appear in nature, as short-lived resonant enhancements decaying into multiple possible final…Jozef J. Dudek·Sep 19, 2018SaveLearn
Quasiparticle properties of nonequilibrium gluon plasmaWe apply classical gluodynamics to early stages of ultrarelativistic heavy-ion collisions. We start by going through the space-time evolution of ultrarelativistic heavy-ion collisions in the color…Jarkko Peuron·Sep 19, 2018SaveLearn
News from the Lattice: example of the pion distribution amplitudeIn this contribution I present a brief summary of recent progress in selected Lattice QCD techniques and subsequently illustrate them using the example of the current calculations of moments of meson…Piotr Korcyl·Sep 17, 2018SaveLearn
How perturbative are heavy sea quarks?Effects of heavy sea quarks on the low energy physics are described by an effective theory where the expansion parameter is the inverse quark mass, 1/M. At leading order in 1/M (and neglecting…Andreas Athenodorou, Jacob Finkenrath, Francesco Knechtli et al.·Sep 10, 2018SaveLearn
Calculation of K ππ decay amplitudes with an improved Wilson fermion action in a nonzero momentum frame in lattice QCDWe present our result for the Kππ decay amplitudes for both the ΔI=1/2 and 3/2 processes with the improved Wilson fermion action. In order to realize the physical kinematics, where the pions…N. Ishizuka, K. -I. Ishikawa, A. Ukawa et al.·Sep 10, 2018SaveLearn
Improvements to Nucleon Matrix Elements within a θ Vacuum from Lattice QCDUsing the gradient flow, we calculated the nucleon mixing angle αN and the nucleon electric dipole moment (EDM) induced by the QCD θ-term. To do so, we computed the topological charge, and the…Jack Dragos, Thomas Luu, Andrea Shindler et al.·Sep 10, 2018SaveLearn
Composite phenomenology as a target for lattice QCDSome recent beyond Standard Model phenomenology is based on new strongly interacting dynamics of SU(N) gauge fields coupled to various numbers of fermions. When N=3 these systems are analogues of…Thomas DeGrand, Ethan Neil·Sep 10, 2018SaveLearn
|Vus| from K 3 decay and four-flavor lattice QCDUsing HISQ Nf=2+1+1 MILC ensembles with five different values of the lattice spacing, including four ensembles with physical quark masses, we have performed the most precise computation to date of…A. Bazavov, C. Bernard, C. DeTar et al.·Sep 8, 2018SaveLearn
Quark propagator with two flavors of O(a)-improved Wilson fermionsWe compute the Landau gauge quark propagator from lattice QCD with two flavors of dynamical O(a)-improved Wilson fermions. The calculation is carried out with lattice spacings ranging from 0.06 fm to…Orlando Oliveira, Paulo J. Silva, Jon-Ivar Skullerud et al.·Sep 7, 2018SaveLearn
Scattering with real-time path integralsSharp-momentum transition matrix elements for scattering from a short-range Gaussian potential are computed using a real-time path integral. The computation is based on a numerical implementation of…W. N. Polyzou, Ekaterina Nathanson·Sep 7, 2018SaveLearn