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A Fermion Doublet With Chiral Gauge Interaction On A Lattice: We present a new staggered discretization of the Dirac operator. Doubling
gives only a doublet of Dirac fermions which we propose to interpret as a
physical (lepton or quark) doublet. If coupled with gauge fields, an
$(1+\gamma^5)$ chiral interaction appears... | hep-lat |
Strong-coupling effective action(s) for SU(3) Yang-Mills: We apply strong-coupling expansion techniques to finite-temperature lattice
pure gauge theory, obtaining dimensionally reduced $Z_N$-symmetric effective
theories. The analytic mappings between the effective couplings and the
original one, viz. $\beta$, allow to ... | hep-lat |
Topological susceptibility in two-flavor QCD: We compute the topological susceptibility in QCD with two flavors of
dynamical fermions using numerical simulation with overlap fermions. | hep-lat |
Hadron Spectrum with Wilson fermions: We present results of a high statistics study of the quenched spectrum using
Wilson fermions at $\beta=6.0$ on $32^3 \times 64$ lattices. We calculate the
masses of mesons and baryons composed of both degenerate and non-degenerate
quarks. Using non-degenerate quark combinations all... | hep-lat |
Progress applying density of states for gravitational waves: Many models of composite dark matter feature a first-order confinement
transition in the early Universe, which would produce a stochastic background
of gravitational waves that will be searched for by future gravitational-wave
observatories. We present work i... | hep-lat |
$I=0$ $ππ$ $s$-wave scattering length from lattice QCD: We deliver lattice results for the $I=0$ $\pi\pi$ elastic $s$-wave scattering
length calculated with the MILC $N_f=3$ flavors of the Asqtad-improved
staggered fermions. The scattering phase shifts are determined by L\"uscher's
formula from the energy-eigenvalues o... | hep-lat |
On meson spectral functions at high temperature and nonzero momentum: In the high-temperature phase of QCD meson spectral functions at nonzero
momentum are expected to have a nontrivial and interesting structure. In order
to provide a reference point for lattice studies employing e.g. the Maximal
Entropy Method, we dis... | hep-lat |
Vacuum Entanglement Harvesting in the Ising Model: The low-energy states of quantum many body systems, such as spin chains, are
entangled. Using tensor network computations, we demonstrate a protocol that
distills Bell pairs out of the ground state of the prototypical
transverse-field Ising model. We explore the behavi... | hep-lat |
Magnetic and electric screening masses from Polyakov-loop correlations: Screening properties of the quark gluon plasma are studied from Polyakov-loop
correlation in lattice QCD simulations with two flavors of improved Wilson
quarks at temperatures $T/\Tpc \simeq 1$--4 where $\Tpc$ is the pseudocritical
temperature. Usi... | hep-lat |
The quark-mass dependence of the potential energy between static colour
sources in the QCD vacuum with light and strange quarks: The low-lying energy spectrum of the static-colour-source-anti-source system
in a vacuum containing light and strange quarks is computed using lattice QCD
for a range of different light qua... | hep-lat |
Determinant Calculations Using Random Walk Worldline Loops: We use statistical ensembles of worldline loops generated by random walk on
hypercubic lattices to calculate matter determinants in background Yang-Mills
fields. | hep-lat |
Scaling test of quenched Wilson twisted mass QCD at maximal twist: We present the results of an extended scaling test of quenched Wilson twisted
mass QCD. We fix the twist angle by using two definitions of the critical mass,
the first obtained by requiring the vanishing of the pseudoscalar meson mass
m_PS for standard ... | hep-lat |
Capillary Waves in Binder's Approach to the Interface Tension: In Binder's approach the reduced interface tension sigma of the Ising model
in the broken phase is determined from the finite volume effects of the
partition function Z(M) at fixed total magnetization M. For small |M| the
partition function of a system of s... | hep-lat |
Development of Lattice QCD Tool Kit on Cell Broadband Engine Processor: We report an implementation of a code for SU(3) matrix multiplication on
Cell/B.E., which is a part of our project, Lattice Tool Kit on Cell/B.E.. On
QS20, the speed of the matrix multiplication on SPE in single precision is
227GFLOPS and it become... | hep-lat |
Tensor renormalization group approach to (1+1)-dimensional SU(2)
principal chiral model at finite density: We apply the tensor renormalization group method to the (1+1)-dimensional
SU(2) principal chiral model at finite chemical potential with the use of the
Gauss-Legendre quadrature to discretize the SU(2) Lie group... | hep-lat |
Color superconductivity in a small box: a complex Langevin study: It is expected that the color superconductivity (CSC) phase appears in QCD at
low temperature and high density. On the basis of the lattice perturbation
theory, a possible parameter region in which the CSC occurs has been predicted.
In this work, we perf... | hep-lat |
Surface operator study in SU(2) gauge field theory: The surface operator in an SU(2) gauge field theory is studied. We analyze
Abelian projection of the SU(2) symmetry to the U(1) group calculating the
surface parameter. The surface parameter dependence on the surface area and
volume is studied in confinement and decon... | hep-lat |
Non-Perturbative Renormalization of Lattice Four-Fermion Operators
without Power Subtractions: A general non-perturbative analysis of the renormalization properties of
$\Delta I=3/2$ four-fermion operators in the framework of lattice
regularization with Wilson fermions is presented. We discuss the
non-perturbative de... | hep-lat |
Probing hadron wave functions in Lattice QCD: Gauge-invariant equal-time correlation functions are calculated in lattice
QCD within the quenched approximation and with two dynamical quark species.
These correlators provide information on the shape and multipole moments of the
pion, the rho, the nucleon and the $\Delta$... | hep-lat |
The Anderson transition in QCD with $N_f=2+1+1$ twisted mass quarks:
overlap analysis: Chiral 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 a global description. The
level... | hep-lat |
Determining the chiral condensate from the distribution of the winding
number beyond topological susceptibility: The first two non-trivial moments of the distribution of the topological
charge (or gluonic winding number), i.e., the topological susceptibility and
the fourth cumulant, can be computed in lattice QCD sim... | hep-lat |
Semileptonic decays $B\rightarrow D^{(*)}lν$ at nonzero recoil: We have analyzed the semileptonic decays $B\rightarrow D\ell\nu$ and
$B\rightarrow D^*\ell\nu$ on the full suite of MILC (2+1)-flavor asqtad
ensembles with lattice spacings as small as 0.045 fm and light-to-strange-quark
mass ratios as low as 1/20. We use ... | hep-lat |
Beauty mesons in $N_f=2+1+1+1 $ lattice QCD with exact chiral symmetry: We present the first study of $N_f=2+1+1+1$ lattice QCD with domain-wall
quarks. The $(b, c, s)$ quarks are physical, while the $(u, d)$ quarks are
heavier than their physical masses, with the pion mass $ \sim 700 $ MeV. The
gauge ensemble is gener... | hep-lat |
Improved Lattice Renormalization Group Techniques: We compute the bare step-scaling function $s_b$ for SU(3) lattice gauge
theory with $N_f = 12$ massless fundamental fermions, using the
non-perturbative Wilson-flow-optimized Monte Carlo Renormalization Group
two-lattice matching technique. We use a short Wilson flow t... | hep-lat |
Instanton Distribution in Quenched and Full QCD: In order to optimize cooling as a technique to study the instanton content of
the QCD vacuum, we have studied the effects of alternative algorithms, improved
actions and boundary conditions on the evolution of single instantons and
instanton anti-instanton pairs. Using t... | hep-lat |
Compactified N=1 supersymmetric Yang-Mills theory on the lattice:
Continuity and the disappearance of the deconfinement transition: Fermion boundary conditions play a relevant role in revealing the confinement
mechanism of N=1 supersymmetric Yang-Mills theory with one compactified
space-time dimension. A deconfinemen... | hep-lat |
The static quark self-energy at large orders from NSPT: Using Numerical Stochastic Perturbation Theory (NSPT), we calculate the
static self-energy of SU(3) gauge theory up to order \alpha^{20}. Simulations
on a large set of different lattice volumes allow for a careful treatment of
finite size effects. The resulting in... | hep-lat |
Form and index of Ginsparg-Wilson fermions: We clarify the questions rised by a recent example of a lattice Dirac
operator found by Chiu. We show that this operator belongs to a class based on
the Cayley transformation and that this class on the finite lattice generally
does not admit a nonvanishing index, while in the... | hep-lat |
A library of extended high-temperature expansions of basic observables
for the spin S Ising models on two- and three-dimensional lattices: We present an on-line library of unprecedented extension for high-temperature
expansions of basic observables in the Ising models of general spin S, with
nearest-neighbor interact... | hep-lat |
Gribov copies, Lattice QCD and the gluon propagator: We address the problem of Gribov copies in lattice QCD. The gluon propagator
is computed, in the Landau gauge, using 302 ($\beta = 5.8$) $12^4$
configurations gauge fixed to different copies. The results of the simulation
shows that: i) the effect of Gribov copies is... | hep-lat |
Quenched scalar meson correlator with Domain Wall Fermions: We study the singlet and non-singlet scalar-meson masses using domain wall
fermions and the quenched approximation. The singlet mass is found to be
smaller than the non-singlet mass and indicates that the lowest singlet meson
state could be lighter than 1 GeV.... | hep-lat |
The sign problem and the Lefschetz thimble: Recently, we have proposed a novel approach (arxiv:1205.3996) to deal with
the sign problem that hinders Monte Carlo simulations of many quantum field
theories (QFTs). The approach consists in formulating the QFT on a Lefschetz
thimble. In this paper we concentrate on the app... | hep-lat |
Finite Temperature Phase Transition in SU(2) Lattice Gauge Theory with
Extended Action: We study the three dimensional fundamental-adjoint $SU(2)$ lattice gauge
theory at finite temperature by Monte Carlo simulations. We find that the
finite temperature deconfinement phase transition line joins the first order
bulk p... | hep-lat |
Investigation of Doubly Heavy Tetraquark Systems using Lattice QCD: We search for possibly existent bound states in the heavy-light tetraquark
channels with quark content $ \bar{b}\bar{b}ud $, $ \bar{b}\bar{b}us $ and $
\bar{b}\bar{c}ud $ using lattice QCD. We carry out calculations on several
gauge link ensembles with... | hep-lat |
Width of the flux tube in compact U(1) gauge theory in three dimensions: We study the squared width and the profile of flux tubes in compact U(1)
lattice gauge theory in three spacetime dimensions. The results obtained from
numerical calculations in the dual formulation of this confining theory are
compared with predic... | hep-lat |
Ising description of the transition region in SU(3) gauge theory at
finite temperature: We attempt the numerical construction of an effective action in three
dimensions for Ising spins which represent the Wilson lines in the
four-dimensional SU(3) gauge theory at finite temperature. For each
configuration of the gaug... | hep-lat |
Domain decomposition and multilevel integration for fermions: The numerical computation of many hadronic correlation functions is
exceedingly difficult due to the exponentially decreasing signal-to-noise ratio
with the distance between source and sink. Multilevel integration methods,
using independent updates of separa... | hep-lat |
THE QCD ABACUS: A New Formulation for Lattice Gauge Theories: A quantum Hamiltonian is constructed for SU(3) lattice QCD entirely from
color triplet Fermions --- the standard quarks and a new Fermionic
``constituent'' of the gluon we call ``rishons''. The quarks are represented by
Dirac spinors on each site and the gau... | hep-lat |
The principle of indirect elimination: The principle of indirect elimination states that an algorithm for solving
discretized differential equations can be used to identify its own
bad-converging modes. When the number of bad-converging modes of the algorithm
is not too large, the modes thus identified can be used to s... | hep-lat |
Fermion RG blocking transformations and IR structure: We explore fermion RG block-spinning transformations on the lattice with the
aim of studying the IR structure of gauge theories and, in particular, the
existence of IR fixed points for varying fermion content. In the case of light
fermions the main concern and diffi... | hep-lat |
Onium Masses with Three Flavors of Dynamical Quarks: We have greatly extended an earlier calculation of the charmonium spectrum on
three flavor dynamical quark ensembles by using more recent ensembles generated
by the MILC collaboration. The heavy quarks are treated using the Fermilab
formulation. The charmonium state ... | hep-lat |
The Euclidean two-point correlation function of the topological charge
density: We study the Euclidean two-point correlation function $G_q(x)$ of the
topological charge density in QCD. A general statement based on reflection
positivity tells us that $G_q(x)<0$ for $x\neq 0 $. On the other hand the
topological suscept... | hep-lat |
Performance of lattice QCD programs on CP-PACS: The CP-PACS is a massively parallel MIMD computer with the theoretical peak
speed of 614 GFLOPS which has been developed for computational physics
applications at the University of Tsukuba, Japan. We report on the performance
of the CP-PACS computer measured during recent... | hep-lat |
Infrared behavior of the Faddeev-Popov operator in Coulomb gauge QCD: We calculate the eigenvalue distribution of the Faddeev-Popov operator in
Coulomb gauge QCD using quenched SU(3) lattice simulation. In the confinement
phase, the density of the low-lying eigenvalues increases with lattice volume,
and the confinement... | hep-lat |
Understanding Parton Distributions from Lattice QCD: Present Limitations
and Future Promise: This talk will explain how ground state matrix elements specifying moments of
quark density and spin distributions in the nucleon have been calculated in
full QCD, show how physical extrapolation to the chiral limit including... | hep-lat |
(Approximate) Low-Mode Averaging with a new Multigrid Eigensolver: We present a multigrid based eigensolver for computing low-modes of the
Hermitian Wilson Dirac operator. For the non-Hermitian case multigrid methods
have already replaced conventional Krylov subspace solvers in many lattice QCD
computations. Since the ... | hep-lat |
Constraining $1+\mathcal{J}\to 2$ coupled-channel amplitudes in
finite-volume: Whether one is interested in accessing the excited spectrum of hadrons or
testing the standard model of particle physics, electroweak transition
processes involving multi-hadron channels in the final state play an important
role in a varie... | hep-lat |
First experiences with HMC for dynamical overlap fermions: We describe an HMC algorithm for dynamical overlap fermions which makes use
of their good chiral properties. We test the algorithm in the Schwinger model.
Topological sectors are readily changed even in the massless case. | hep-lat |
Fixed-scale approach to finite-temperature lattice QCD with shifted
boundaries: We study the thermodynamics of the SU(3) gauge theory using the fixed-scale
approach with shifted boundary conditions. The fixed-scale approach can reduce
the numerical cost of the zero-temperature part in the equation of state
calculatio... | hep-lat |
Spectrum of the Dirac Operator and Multigrid Algorithm with Dynamical
Staggered Fermions: Complete spectra of the staggered Dirac operator $\Dirac$ are determined in
quenched four-dimensional $SU(2)$ gauge fields, and also in the presence of
dynamical fermions.
Periodic as well as antiperiodic boundary conditions a... | hep-lat |
Radiative improvement of the lattice NRQCD action using the background
field method and application to the hyperfine splitting of quarkonium states: We present the first application of the background field method to
Non-Relativistic QCD (NRQCD) on the lattice in order to determine the one-loop
radiative corrections t... | hep-lat |
Light quark correlators in a mixed-action setup: We report our progress in simulating Neuberger valence fermions on N_f=2
Wilson O(a)-improved sea quarks. We compute correlators with valence quark
masses both in the p- and in the epsilon-regime, and we match the results with
the predictions of the Chiral Effective Theo... | hep-lat |
Microscopic Origin of \boldmath{$U_A(1)$} Symmetry Violation in the High
Temperature Phase of QCD: We investigate the low-lying eigenmodes of the Dirac matrix with the aim to
gain more insight into the temperature dependence of the anomalous $U_A(1)$
symmetry. We use the overlap operator to probe dynamical QCD config... | hep-lat |
The Coulomb flux tube revisited: We perform $SU(2)$ Yang-Mills lattice simulation of the electric field
distribution in the Coulomb gauge for different values of $\beta$ to further
investigate the nature of the Coulomb flux tube. | hep-lat |
Critical Behavior of the Schwinger Model with Wilson Fermions: We present a detailed analysis, in the framework of the MFA approach, of the
critical behaviour of the lattice Schwinger model with Wilson fermions on
lattices up to $24^2$, through the study of the Lee-Yang zeros and the specific
heat. We find compelling e... | hep-lat |
Lattice study of the Schwinger model at fixed topology: At small lattice spacing QCD simulations are expected to become stuck in a
single topological sector. Observables evaluated in a fixed topological sector
differ from their counterparts in full QCD, i.e. at unfixed topology, by volume
dependent corrections. We inve... | hep-lat |
The static energy of a quark-antiquark pair from Laplacian eigenmodes: We test a method for computing the static quark-antiquark potential in
lattice QCD, which is not based on Wilson loops, but where the trial states are
formed by eigenvector components of the covariant lattice Laplace operator. The
runtime of this me... | hep-lat |
Fisher's zeros as boundary of RG flows in complex coupling space: We discuss the possibility of extending the RG flows to complex coupling
spaces. We argue that the Fisher's zeros are located at the boundary of the
complex basin of attraction of IR fixed points. We support this picture with
numerical calculations at fi... | hep-lat |
A study of center and chiral symmetry realization in thermal
$\mathcal{N}=1$ super Yang-Mills theory using the gradient flow: The realization of center and chiral symmetries in $\mathcal{N}=1$ super
Yang-Mills theory (SYM) is investigated on a four-dimensional Euclidean lattice
by means of Monte Carlo methods. At zer... | hep-lat |
Lattice QCD calculation of the electroweak box diagrams for the kaon
semileptonic decays: We present a lattice QCD calculation of the axial $\gamma W$-box diagrams
relevant for the kaon semileptonic decays. We utilize a recently proposed
method, which connects the electroweak radiative corrections in Sirlin's
represe... | hep-lat |
Leading order mesonic and baryonic SU(3) low energy constants from $N_f
= 3$ lattice QCD: We determine the leading order mesonic~($B_0$ and $F_0$) and baryonic~($m_0$,
$D$ and $F$) SU(3) chiral perturbation theory low energy constants from lattice
QCD. We employ gauge ensembles with $N_f=3$ (i.e., $m_u=m_d=m_s$)
non-... | hep-lat |
Canonical Transformations and Loop Formulation of SU(N) Lattice Gauge
Theories: We construct canonical transformations to reformulate SU(N) Kogut-Susskind
lattice gauge theory in terms of a set of fundamental loop & string flux
operators along with their canonically conjugate loop & string electric fields.
We show th... | hep-lat |
Improved actions and lattice coarsening effects in MCRG studies in SU(2)
LGT: We study decimation procedures and effective (improved) actions in the
framework of Monte Carlo Renormalization Group (MCRG). Particular attention is
paid to matching the form of the effective action to the decimation procedure
parameters. ... | hep-lat |
Nucleon form factors and root-mean-square radii on a (10.8 fm$)^4$
lattice at the physical point: We present the nucleon form factors and root-mean-square (RMS) radii measured
on a (10.8 fm$)^4$ lattice at the physical point. We compute the form factors
at small momentum transfer region in $q^2\le 0.102$ GeV$^2$ with... | hep-lat |
Derivation of Chiral Lagrangians from Random Lattice QCD: In our work we extend the ideas of the derivation of the chiral effective
theory from the lattice QCD [1] to the case of the random lattice
regularization of QCD. Such procedure allows in principle to find contribution
of any order into the chiral effective lagr... | hep-lat |
Supersymmetric Yang-Mills Theories from Domain Wall Fermions: We present work in progress on employing domain wall fermions to simulate N=1
supersymmetric Yang-Mills theories on the lattice in d=4 and d=3 dimensions.
The geometrical nature of domain wall fermions gives simple insights into how
to construct these theori... | hep-lat |
Ginsparg-Wilson relation and lattice Weyl fermions: We demonstrate that in the topologically trivial gauge sector the
Ginsparg-Wilson relation for lattice Dirac operators admits an exactly gauge
invariant path integral formulation of the Weyl fermions on a lattice. | hep-lat |
Probing the Region of Massless Quarks in Quenched Lattice QCD using
Wilson Fermions: We study the spectrum of $H(m)=\gamma_5 W(-m)$ with $W(m)$ being the
Wilson-Dirac operator on the lattice with bare mass equal to $m$. The
background gauge fields are generated using the SU(3) Wilson action at
$\beta=5.7$ on an $8^3\... | hep-lat |
Comment on "The QCD axion beyond the classical level: A lattice study": We rebut the claim by Nakamura and Schierholz [1] that the mass of a
potential axion needs to be no less than ~230MeV pointing out errors in both
their analytic argument and numerical simulations. | hep-lat |
Gluon gravitational structure of hadrons of different spin: The gravitational form factors (GFFs) of hadrons encode the matrix elements
of the energy momentum tensor of QCD. These quantities describe how energy,
spin, and various mechanical properties of hadrons are carried by their quark
and gluon constituents. We pre... | hep-lat |
Spontaneous supersymmetry breaking in the two-dimensional N=1
Wess-Zumino model: We study the phase diagram of the two-dimensional N=1 Wess-Zumino model on
the lattice using Wilson fermions and the fermion loop formulation. We give a
complete nonperturbative determination of the ground state structure in the
continuu... | hep-lat |
B Meson Decay Constants Using NRQCD: Recent results for B meson decay constants with NRQCD b-quarks and clover
light quarks are discussed. Perturbative matching factors through O($\alpha/M$)
are now available and incorporated into the analyses. An O($\alpha a$)
improvement term to the heavy-light axial current is ident... | hep-lat |
Flavor Twisted Boundary Conditions, Pion Momentum, and the Pion
Electromagnetic Form Factor: We investigate the utility of partially twisted boundary conditions in
lattice calculations of meson observables. For dynamical simulations, we show
that the pion dispersion relation is modified by volume effects. In the isos... | hep-lat |
Topological susceptibility of $2d~\mathrm{CP}^1$ or $\mathrm{O}(3)$
non-linear $σ$-model: is it divergent or not?: The topological susceptibility of $2d$ $\mathrm{CP}^{N-1}$ models is
expected, based on perturbative computations, to develop a divergence in the
limit $N \to 2$, where these models reduce to the well-kn... | hep-lat |
Monopole Loop Distribution and Confinement in SU(2) Lattice Gauge Theory: The abelian-projected monopole loop distribution is extracted from maximal
abelian gauge simulations. The number of loops of a given length falls as a
power of the length nearly independent of lattice size. This power increases
with $\beta=4/g^2$... | hep-lat |
Weak Coupling Limit of U(1) Lattice Model in Fourier Basis: The transfer-matrix of the U(1) lattice model is considered in the Fourier
basis and in the weak coupling limit. The issues of Gauss law constraint and
gauge invariant states are addressed in the Fourier basis. In particular, it is
shown that in the strong cou... | hep-lat |
Running coupling in SU(2) with adjoint fermions: We present a measurement of the Schr\"odinger Functional running coupling in
SU(2) lattice gauge theory with adjoint fermions. We use HEX smearing and
clover improvement to reduce the discretization effects. We obtain a robust
continuum limit for the step scaling, which ... | hep-lat |
Spectral Analysis of Causal Dynamical Triangulations via Finite Element
Method: We examine the dual graph representation of simplicial manifolds in Causal
Dynamical Triangulations (CDT) as a mean to build observables, and propose a
new representation based on the Finite Element Methods (FEM). In particular,
with the ... | hep-lat |
The dependence of observables on action parameters: Many applications in Lattice field theory require to determine the Taylor
series of observables with respect to action parameters. A primary example is
the determination of electromagnetic corrections to hadronic processes. We show
two possible solutions to this gener... | hep-lat |
$ρ$ meson decay on asymmetrical lattices: We present a lattice QCD calculation of the characteristics of the $\rho$
meson decay. The study is carried out on spatially asymmetric boxes using
nHYP-smeared clover fermions in the quenched approximation. The resonance mass
and coupling constant are calculate using the P-wav... | hep-lat |
Dynamical quantum phase transitions in a noisy lattice gauge theory: Lattice gauge theories (LGTs) form an intriguing class of theories highly
relevant to both high-energy particle physics and low-energy condensed matter
physics with the rapid development of engineered quantum devices providing new
tools to study e.g. ... | hep-lat |
Dynamics of the 2d Potts model phase transition: The dynamics of 2d Potts models, which are temperature driven through the
phase transition using updating procedures in the Glauber universality class,
is investigated. We present calculations of the hysteresis for the (internal)
energy and for Fortuin-Kasteleyn clusters... | hep-lat |
Study of Chiral Symmetry and $U(1)_A$ using Spatial Correlators for
$N_f=2+1$ QCD at finite temperature with Domain Wall Fermions: Based on simulations of 2+1 flavor lattice QCD with M\"obius domain wall
fermions at high temperatures, we compute a series of spatial correlation
functions to study the screening masses ... | hep-lat |
Decomposition of the static potential in SU(3) gluodynamics: After fixing the Maximal Abelian gauge in SU(3) lattice gluodynamics we
decompose the nonabelian gauge field into the Abelian field created by Abelian
monopoles and the modified nonabelian field with monopoles removed. We then
calculate respective static pote... | hep-lat |
Higher moments of charge fluctuations in QCD at high temperature: We present lattice results for baryon number, strangeness and electric charge
fluctuations as well as their correlations at finite temperature and vanishing
chemical potentials, i.e. under conditions relevant for RHIC and LHC. We find
that the fluctuatio... | hep-lat |
SU(2) Flux Distributions on Finite Lattices: We studied SU(2) flux distributions on four dimensional euclidean lattices
with one dimension very large. By choosing the time direction appropriately we
can study physics in two cases: one is finite volume in the zero temperature
limit, another is finite temperature in the ... | hep-lat |
2018 Update on $\varepsilon_K$ with lattice QCD inputs: We present updated results for $\varepsilon_K$ determined directly from the
standard model (SM) with lattice QCD inputs such as $\hat{B}_K$, $|V_{cb}|$,
$|V_{us}|$, $\xi_0$, $\xi_2$, $\xi_\text{LD}$, $F_K$, and $m_c$. We find that
the standard model with exclusive... | hep-lat |
Polarized and Unpolarized Nucleon Structure Functions from Lattice QCD: We report on a high statistics quenched lattice QCD calculation of the
deep-inelastic structure functions $F_1$, $F_2$, $g_1$ and $g_2$ of the proton
and neutron. The theoretical basis for the calculation is the operator product
expansion. We consi... | hep-lat |
Negative moment of inertia and rotational instability of gluon plasma: Using first-principle numerical simulations of the lattice SU(3) gauge
theory, we calculate the isothermal moment of inertia of the rigidly rotating
gluon plasma. We find that the moment of inertia unexpectedly takes a negative
value below the "supe... | hep-lat |
Coulomb gauge studies of SU(3) Yang-Mills theory on the lattice: We study the infrared behaviour of lattice SU(3) Yang-Mills theory in Coulomb
gauge in terms of the ghost propagator, the Coulomb potential and the
transversal and the time-time component of the equal-time gluon propagator. In
particular, we focus on the ... | hep-lat |
Making chiral fermion actions (almost) gauge invariant using Laplacian
gauge fixing: Straight foreward lattice descriptions of chiral fermions lead to actions
that break gauge invariance. I describe a method to make such actions gauge
invariant (up to global gauge transformations) with the aid of gauge fixing. To
mak... | hep-lat |
Continuum Results for Light Hadronic Quantities using Domain Wall
Fermions with the Iwasaki and DSDR Gauge Actions: We present preliminary continuum results for light hadronic quantities
obtained by the RBC/UKQCD collaboration using domain wall fermions with both
the Iwasaki and the novel Dislocation Suppressing Dete... | hep-lat |
Solitons and spontaneous symmetry breaking in 2 and 4 dimensions: We show that mass generation in 1+1 and 3+1 dimensions may occur together
with spontaneous symmetry breaking. | hep-lat |
Aspects of Chiral Symmetry and the Lattice: I explore the non-perturbative issues entwining lattice gauge theory,
anomalies, and chiral symmetry. After briefly reviewing the importance of
chiral symmetry in particle physics, I discuss how anomalies complicate lattice
formulations. Considerable information can be deduce... | hep-lat |
The Polyakov Loop and the Eigenvalues of the Dirac Operator: Aiming at the link between confinement and chiral symmetry the Polyakov loop
represented as a spectral sum of eigenvalues of the Dirac operator was subject
of recent studies. We analyze the volume dependence as well as the continuum
behavior of this quantity ... | hep-lat |
Expressing the three-particle finite-volume spectrum in terms of the
three-to-three scattering amplitude: In this article we complete our formalism relating the finite-volume energy
spectrum of a scalar quantum field theory to the three-to-three scattering
amplitude, ${\cal M}_3$. In previous work we found a quantiza... | hep-lat |
$B\to D^{(\ast)}\ellν$ at non-zero recoil: $B$ anomalies play a prominent role in Beyond the Standard Model (BSM)
physics searches. In particular, the long standing tension between the
inclusive and the exclusive determinations of the CKM matrix element $|V_{cb}|$
and the current tensions in the $R(D)$--$R(D^\ast)$ pla... | hep-lat |
Lattice QCD at non-zero baryon number: We discuss the quenched limit of lattice QCD at non-zero baryon number
density. We find evidence for a mixed phase that becomes broader with
increasing baryon number. Although the action is explicitly Z(3) symmetric the
Polyakov loop expectation value becomes non-zero already in t... | hep-lat |
Lattice Gauge Fields Topology Uncovered by Quaternionic sigma-model
Embedding: We investigate SU(2) gauge fields topology using new approach, which exploits
the well known connection between SU(2) gauge theory and quaternionic
projective sigma-models and allows to formulate the topological charge density
entirely in ... | hep-lat |
On the fractal structure of two-dimensional quantum gravity: We provide evidence that the Hausdorff dimension is 4 and the spectral
dimension is 2 for two-dimensional quantum gravity coupled the matter with a
central charge $c \leq 1$. For $c > 1$ the Hausdorff dimension and the spectral
dimension monotonously decrease... | hep-lat |
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