The phase diagram of heavy dense QCD with complex Langevin simulationsThe sign problem of QCD prevents standard lattice simulations to determine the phase diagram of strong interactions with a finite chemical potential directly. Complex Langevin simulations provide an…Gert Aarts, Felipe Attanasio, Benjamin Jäger et al.·Jun 8, 2015SaveLearn
Computational Physics: An Introduction to Monte Carlo Simulations of Matrix Field TheoryThis book is divided into two parts. In the first part we give an elementary introduction to computational physics consisting of 21 simulations which originated from a formal course of lectures and…Badis Ydri·Jun 5, 2015SaveLearn
On the Higgs-Confinement ComplementarityIt has been noticed long ago that in Higgs models with `complete symmetry breaking' one can move from the confinement to the Higgs regime without crossing a phase boundary, a fact sometimes…Erhard Seiler·Jun 2, 2015SaveLearn
Hadron-Hadron Interactions from Nf=2+1+1 Lattice QCD: isospin-2 ππ scattering lengthWe present results for the I=2 ππ scattering length using Nf=2+1+1 twisted mass lattice QCD for three values of the lattice spacing and a range of pion mass values. Due to the use of Laplacian…C. Helmes, C. Jost, B. Knippschild et al.·Jun 1, 2015SaveLearn
The chromomagnetic operator on the latticeWe present our study of the renormalization of the chromomagnetic operator,O(CM), which appears in the effective Hamiltonian describing Delta S = 1 transitions in and beyond the Standard Model. We…M. Constantinou, M. Costa, R. Frezzotti et al.·Jun 1, 2015SaveLearn
The Yang-Mills gradient flow and renormalizationIn this proceedings contribution we will review the main ideas behind the many recent works that apply the gradient flow to the determination of the renormalized coupling and the renormalization of…Alberto Ramos·May 30, 2015SaveLearn
Standard-model prediction for direct CP violation in Kππ decayWe report the first lattice QCD calculation of the complex kaon decay amplitude A0 with physical kinematics, using a 323× 64 lattice volume and a single lattice spacing a, with $1/a=…Z. Bai, T. Blum, P. A. Boyle et al.·May 28, 2015SaveLearn
Supersymmetric quantum mechanics on the lattice: III. Simulations and algorithmsIn the fermion loop formulation the contributions to the partition function naturally separate into topological equivalence classes with a definite sign. This separation forms the basis for an…David Baumgartner, Urs Wenger·May 27, 2015SaveLearn
Inclusion of isospin breaking effects in lattice simulationsIsospin symmetry is explicitly broken in the Standard Model by the mass and electric charge of the up and down quarks. These effects represent a perturbation of hadronic amplitudes at the percent…Antonin Portelli·May 26, 2015SaveLearn
ΔS=2 and ΔC=2 bag parameters in the SM and beyond from Nf=2+1+1 twisted-mass LQCDWe present unquenched lattice QCD results for the matrix elements of four-fermion operators relevant to the description of the neutral K and D mixing in the Standard Model and its extensions. We have…N. Carrasco, P. Dimopoulos, R. Frezzotti et al.·May 25, 2015SaveLearn
The Charmonium Potential at Non-Zero TemperatureThe potential between charm and anti-charm quarks is calculated non-perturbatively using physical, rather than static quarks at temperatures on both sides of the deconfinement transition T C,…Chris Allton, Wynne Evans, Pietro Giudice et al.·May 25, 2015SaveLearn
Polyakov loop fluctuations in Dirac eigenmode expansionWe investigate correlations of the Polyakov loop fluctuations with eigenmodes of the lattice Dirac operator. Their analytic relations are derived on the temporally odd-number size lattice with the…Takahiro M. Doi, Krzysztof Redlich, Chihiro Sasaki et al.·May 21, 2015SaveLearn
The lattice gluon propagator in renormalizable ξ gaugesWe study the SU(3) gluon propagator in renormalizable Rξ gauges implemented on a symmetric lattice with a total volume of (3.25 fm)4 for values of the guage fixing parameter up to ξ=0.5. As…P. Bicudo, D. Binosi, N. Cardoso et al.·May 21, 2015SaveLearn
A comparison of updating algorithms for large N reduced modelsWe investigate Monte Carlo updating algorithms for simulating SU(N) Yang-Mills fields on a single-site lattice, such as for the Twisted Eguchi-Kawai model (TEK). We show that performing only…Margarita García Pérez, Antonio González-Arroyo, Liam Keegan et al.·May 21, 2015SaveLearn
Calculation of K ππ decay amplitudes with improved Wilson fermion action 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. Expanding on the earlier works by Bernard et al. and…N. Ishizuka, K. -I. Ishikawa, A. Ukawa et al.·May 20, 2015SaveLearn
Lattice QCD at Non-Zero TemperatureThis is a review of selected recent developments in finite-temperature lattice QCD. The focus is on the properties of the chiral crossover region, deconfinement and fluctuations of conserved charges,…Alexei Bazavov·May 20, 2015SaveLearn
Constituent gluons and the static quark potentialWe suggest that Hamiltonian matrix elements between physical states in QCD might be approximated, in Coulomb gauge, by "lattice-improved" tree diagrams; i.e. tree diagram contributions with…Jeff Greensite, Adam P. Szczepaniak·May 19, 2015SaveLearn
Non-Abelian string breaking phenomena with Matrix Product StatesUsing matrix product states, we explore numerically the phenomenology of string breaking in a non-Abelian lattice gauge theory, namely 1+1 dimensional SU(2). The technique allows us to study the…Stefan Kühn, Erez Zohar, J. Ignacio Cirac et al.·May 17, 2015SaveLearn
Free-form smearing for bottomonium and B meson spectroscopyTo obtain high-quality results from lattice QCD, it is important to use operators that produce good signals for the quantities of interest. Free-form smearing is a powerful tool that helps to…Mark Wurtz, Randy Lewis, R. M. Woloshyn·May 17, 2015SaveLearn
B → D l ν Form Factors at Non-Zero Recoil and Extraction of |Vcb|We present a lattice QCD calculation of the B → D l ν semileptonic decay form factors f+(q2) and f0(q2) for the entire physical q2 range. Non-relativistic QCD (NRQCD) bottom…Heechang Na, Chris M. Bouchard, G. Peter Lepage et al.·May 15, 2015SaveLearn
Discretization effects in Nc=2 QCD and Random Matrix TheoryWe summarize the analytical solution of the Chiral Perturbation Theory for the Hermitian Wilson Dirac operator of Nc=2 QCD with quarks in the fundamental representation. Results have been obtained…Mario Kieburg, Jacobus Verbaarschot, Savvas Zafeiropoulos·May 14, 2015SaveLearn
B-meson spectroscopy in HQET at order 1/mWe present a study of the B spectrum performed in the framework of Heavy Quark Effective Theory expanded to next-to-leading order in 1/m and non-perturbative in the strong coupling. Our analyses have…Fabio Bernardoni, Benoît Blossier, John Bulava et al.·May 13, 2015SaveLearn
Leading hadronic contributions to the running of the electroweak coupling constants from lattice QCDThe quark-connected leading-order hadronic contributions to the running of the electromagnetic fine structure constant, α QED, and the weak mixing angle, θW, are determined by a…Florian Burger, Karl Jansen, Marcus Petschlies et al.·May 13, 2015SaveLearn
Simulations at fixed topology: fixed topology versus ordinary finite volume correctionsLattice QCD simulations tend to get stuck in a single topological sector at fine lattice spacing, or when using chirally symmetric quarks. In such cases computed observables differ from their full…Arthur Dromard, Wolfgang Bietenholz, Urs Gerber et al.·May 13, 2015SaveLearn
Evidence for a new SU(4) symmetry with J=2 mesonsRecently, a new symmetry of mesons has been found upon truncation of the quasi-zero modes of the Overlap Dirac operator in lattice simulations. Namely, the ρ,ρ',ω,ω',a1, b1,h1 and…M. Denissenya, L. Ya. Glozman, M. Pak·May 13, 2015SaveLearn