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Wave functions of $SU(3)$ pure gauge glueballs on the lattice: The Bethe-Salpeter wave functions of $SU(3)$ pure gauge glueballs are
revisited in this study. The ground and the first excited states of scalar and
tensor glueballs are identified unambiguously by using the variational method
on the basis of large operator... | hep-lat |
Is there any gender/race bias in hep-lat primary publication?
Machine-Learning Evaluation of Author Ethnicity and Gender: In this work, we analyze papers that are classified as primary hep-lat to
study whether there is any race or gender bias in the journal-publication
process. We implement machine learning to predic... | hep-lat |
Euclidean partons?: In this talk we reexamine the possibility of evaluating parton distribution
functions from lattice simulations. We show that, while in principle individual
moments can be extracted from lattice data, in all cases the process of
renormalization, hindered by lattice momenta limitation, represents an
o... | hep-lat |
$|V_{ub}|$ determination in lattice QCD: The 2012 PDG reports a tension at the level of $3 \sigma$ between two
exclusive determinations of $|V_{ub}|$. They are obtained by combining the
experimental branching ratios of $B \to \tau \nu$ and $B \to \pi l \nu$
(respectively) with a theoretical computation of the hadronic ... | hep-lat |
Gauge Invariant Effective Action in Abelian Chiral Gauge Theory on the
Lattice: L\"uscher's recent formulation of Abelian chiral gauge theories on the
lattice, in the vacuum (or perturbative) sector in infinite volume, is
reinterpreted in terms of the lattice covariant regularization. The gauge
invariance of the effe... | hep-lat |
Comment on Implications of new physics in the decays $B_c \to
(J/ψ,η_c)τν$: As part of a study BSM corrections to leptonic decays of the $B_c$ meson,
Tran et al. (arXiv:1801.06927) use the covariant confining quark model (CCQM)
to estimate the matrix element of the pseudo-scalar curent between the vacuum
and the $B_c... | hep-lat |
Gauge-invariant nonlocal quark condensates in QCD: We study, by numerical simulations on a lattice, the behaviour of the
gauge-invariant nonlocal quark condensates in the QCD vacuum both in the
quenched approximation and with four flavours of dynamical staggered fermions.
The correlation length of the condensate is det... | hep-lat |
Electromagnetic structure of charmed baryons in Lattice QCD: As a continuation of our recent work on the electromagnetic properties of the
doubly charmed $\Xi_{cc}$ baryon, we compute the charge radii and the magnetic
moments of the singly charmed $\Sigma_c$, $\Omega_c$ and the doubly charmed
$\Omega_{cc}$ baryons in 2... | hep-lat |
Nonperturbative Collins-Soper Kernel from Chiral Quarks with Physical
Masses: We present a lattice QCD calculation of the rapidity anomalous dimension of
quark transverse-momentum-dependent distributions, i.e., the Collins-Soper (CS)
kernel, up to transverse separations of about 1 fm. This unitary lattice
calculation... | hep-lat |
Hadron Structure and Form Factors: We review recent results on hadron form factors and nucleon generalized
parton distibutions obtained with dynamical lattice QCD simulations. We discuss
lattice artifacts and open questions, and present the connection of lattice
results to hadron structure and to the corresponding quan... | hep-lat |
Fast Partitioning of Pauli Strings into Commuting Families for
Expectation Value Measurements of Dense Operators: The cost of measuring quantum expectation values of an operator can be
reduced by grouping the Pauli string ($SU(2)$ tensor product) decomposition of
the operator into maximally commuting sets. We detail ... | hep-lat |
Is SU(3) gauge theory with 13 massless flavors conformal?: We use lattice simulations to study SU(3) gauge theory with 13 massless
fermions in the fundamental representation. We present evidence that the theory
is conformal with a non-zero infrared fixed point in the gauge coupling. We use
a newly-developed technique t... | hep-lat |
Automatic differentiation for error analysis: We present ADerrors.jl, a software for linear error propagation and analysis
of Monte Carlo data. Although the focus is in data analysis in Lattice QCD,
where estimates of the observables have to be computed from Monte Carlo
samples, the software also deals with variables w... | hep-lat |
Lattice QCD Determination of $g_A$: The nucleon axial coupling, $g_A$, is a fundamental property of protons and
neutrons, dictating the strength with which the weak axial current of the
Standard Model couples to nucleons, and hence, the lifetime of a free neutron.
The prominence of $g_A$ in nuclear physics has made it ... | hep-lat |
SPHERICALLY SYMMETRIC RANDOM WALKS I. REPRESENTATION IN TERMS OF
ORTHOGONAL POLYNOMIALS: Spherically symmetric random walks in arbitrary dimension $D$ can be
described in terms of Gegenbauer (ultraspherical) polynomials. For example,
Legendre polynomials can be used to represent the special case of
two-dimensional sp... | hep-lat |
Determinant of a new fermionic action on a lattice - (II): We investigate the fermion determinant of a new action on a
$(1+D)$-dimensional lattice for SU(2) gauge groups. This action possesses the
discrete chiral symmetry and provides $2^D$-component fermions. We also comment
on the numerical results on fermion determi... | hep-lat |
Failure of Mean Field Theory at Large N: We study strongly coupled lattice QCD with $N$ colors of staggered fermions
in 3+1 dimensions. While mean field theory describes the low temperature
behavior of this theory at large $N$, it fails in the scaling region close to
the finite temperature second order chiral phase tra... | hep-lat |
Hamiltonian effective field theory study of the $\mathbf{N^*(1535)}$
resonance in lattice QCD: Drawing on experimental data for baryon resonances, Hamiltonian effective
field theory (HEFT) is used to predict the positions of the finite-volume
energy levels to be observed in lattice QCD simulations of the lowest-lying... | hep-lat |
Free energy of an SU(2) monopole-antimonopole pair: We induce an external ${Z}_2$ monopole-antimonopole pair in an SU(2) lattice
gauge system and measure its free energy as a way to probe the vacuum
structure. We discuss the motivation and computational methodology of the
investigation and illustrate our preliminary re... | hep-lat |
Phase diagram of the three dimensional Thirring model - A Monte Carlo
study: Certain approximate solutions of the continuum Schwinger-Dyson Equations
(SDEs) predict chiral symmetry breaking in the 3d Thirring model when the
number of fermion flavors N_f<4.32 whereas others predict symmetry breaking for
all N_f. Our r... | hep-lat |
A physicist-friendly reformulation of the Atiyah-Patodi-Singer index (on
a lattice): The Atiyah-Singer index theorem on a closed manifold is well understood and
appreciated in physics. On the other hand, the Atiyah-Patodi-Singer index,
which is an extension to a manifold with boundary, is physicist-unfriendly, in
tha... | hep-lat |
Measures of critical exponents in the four dimensional site percolation: Using finite-size scaling methods we measure the thermal and magnetic
exponents of the site percolation in four dimensions, obtaining a value for the
anomalous dimension very different from the results found in the literature. We
also obtain the l... | hep-lat |
A Dual Algorithm for Non-abelian Yang-Mills coupled to Dynamical
Fermions: We extend the dual algorithm recently described for pure, non-abelian
Yang-Mills on the lattice to the case of lattice fermions coupled to
Yang-Mills, by constructing an ergodic Metropolis algorithm for dynamic
fermions that is local, exact, a... | hep-lat |
Chiral perturbation theory in a theta vacuum: We consider chiral perturbation theory (ChPT) with a non-zero theta term. Due
to the CP violating term, the vacuum of chiral fields is shifted to a
non-trivial element on the SU(N_f) group manifold. The CP violation also
provides mixing of different CP eigenstates, between ... | hep-lat |
Preliminary Study of B_K on 2+1 flavor DWF lattices from QCDOC: I present some preliminary calculations of B_K on 2+1 flavor domain-wall
fermion lattices from the QCDOC, including a set of 16^3x32x8 lattices with
a^{-1} near 1.6 GeV. Although a final result awaits the production of a much
longer run, I will compare thi... | hep-lat |
Lattice Study of Radiative $J/ψ$ Decay to a Tensor Glueball: The radiative decay of $J/\psi$ into a pure gauge tensor glueball is studied
in the quenched lattice QCD formalism. With two anisotropic lattices, the
mutlipole amplitudes E_1(0), M_2(0) and E_3(0) are obtained to be
0.114(12)(6)GeV, -0.011(5)(1)GeV, and 0.02... | hep-lat |
Existence and Non-Existence of Doubly Heavy Tetraquark Bound States: In this work we investigate the existence of bound states for doubly heavy
tetraquark systems $ \bar{Q}\bar{Q}'qq' $ in a full lattice-QCD computation,
where heavy bottom quarks are treated in the framework of non-relativistic QCD.
We focus on three s... | hep-lat |
First dynamical simulations with minimally doubled fermions: For thermodynamics studies it is desirable to simulate two degenerate flavors
and retain at least a remnant of the chiral symmetry. Staggered fermions can
achieve this at the cost of rooting the determinant. Rooting can be avoided
using minimally doubled ferm... | hep-lat |
A novel Bayesian approach to spectral function reconstruction: We present a novel approach to the inference of spectral functions from
Euclidean time correlator data that makes close contact with modern Bayesian
concepts. Our method differs significantly from the maximum entropy method
(MEM). A new set of axioms is pos... | hep-lat |
Phase transition in fluctuating branched geometry: We study grand--canonical and canonical properties of the model of branched
polymers proposed in \cite{adfo}. We show that the model has a fourth order
phase transition and calculate critical exponents. At the transition the
exponent $\gamma$ of the grand-canonical ens... | hep-lat |
Bound states for Overlap and Fixed Point Actions close to the chiral
limit: We study the overlap and the fixed point Dirac operators for massive fermions
in the two-flavor lattice Schwinger model. The masses of the triplet (pion) and
singlet (eta) bound states are determined down to small fermion masses and the
mass ... | hep-lat |
Anomalous finite-size scaling at thermal first-order transitions in
systems with disordered boundary conditions: We investigate the equilibrium and off-equilibrium behaviors of systems at
thermal first-order transitions (FOTs) when the boundary conditions favor one
of the two phases. As a theoretical laboratory we co... | hep-lat |
Accurate Scale Determinations for the Wilson Gauge Action: Accurate determinations of the physical scale of a lattice action are
required to check scaling and take the continuum limit. We present a high
statistics study of the static potential for the SU(3) Wilson gauge action on
coarse lattices ($5.54 \leq \beta \leq ... | hep-lat |
Quarkonium correlators at finite temperature and potential models: We discuss the calculations of quarkonium spectral functions in potential
models and their implications for the interpretation of the lattice data on
quarkonium correlators. In particular, we find that melting of different
quarkonium states does not lea... | hep-lat |
The Infrared Landau Gauge Gluon Propagator from Lattice QCD: The quenched Landau gauge gluon propagator is investigated in lattice QCD
with large assimetric lattices, accessing momenta as low as $q \sim 100$ MeV or
smaller. Our investigation focus on the IR limit of the gluon dressing
function, testing the compatibilit... | hep-lat |
Correlations equalities and some upper bounds for the coupling constant
implying area decay of Wilson loop for $Z_3$ lattice gauge theories: Correlation identities are obtained for $Z_3$ lattice gauge theory where the
bonds of the plaquettes are decorated by generalized three-state Ising
variables. Making use of corr... | hep-lat |
Prepotential formulation of SU(3) lattice gauge theory: The SU(3) lattice gauge theory is reformulated in terms of SU(3) prepotential
harmonic oscillators. This reformulation has enlarged $SU(3)\otimes U(1)
\otimes U(1)$ gauge invariance under which the prepotential operators transform
like matter fields. The Hilbert s... | hep-lat |
Specific heat and energy for the three-dimensional O(2) model: We investigate the three-dimensional O(2) model on lattices of size 8^3 to
160^3 close to the critical point at zero magnetic field. We confirm explicitly
the value of the critical coupling J_c found by Ballesteros et al. and estimate
there the universal va... | hep-lat |
Nucleon form factors on a large volume lattice near the physical point
in 2+1 flavor QCD: We present results for the isovector nucleon form factors measured on a
$96^4$ lattice at almost the physical pion mass with a lattice spacing of 0.085
fm in 2+1 flavor QCD. The configurations are generated with the stout-smeare... | hep-lat |
On observable particles in theories with a Brout-Englert-Higgs effect: Even at weak coupling the physical, observable spectrum of gauge theories
with a Brout-Englert-Higgs effect can deviate from the elementary one of
perturbation theory. This can be analytically described and treated using the
Fr\"ohlich-Morchio-Stroc... | hep-lat |
Moments of meson distribution functions with dynamical twisted mass
fermions: We present our preliminary results on the lowest moment <x> of quark
distribution functions of the pion using two flavor dynamical simulations with
Wilson twisted mass fermions at maximal twist. The calculation is done in a
range of pion ma... | hep-lat |
Strategies for the Determination of the Running Coupling of
$(2+1)$-dimensional QED with Quantum Computing: We propose to utilize NISQ-era quantum devices to compute short distance
quantities in $(2+1)$-dimensional QED and to combine them with large volume
Monte Carlo simulations and perturbation theory. On the quant... | hep-lat |
The twelve-flavor $\boldsymbolβ$-function and dilaton tests of the
sextet scalar: We discuss near-conformal gauge theories beyond the standard model (BSM)
where interesting results on the twelve-flavor $\beta$-function of massless
fermions in the fundamental representation of the SU(3) color gauge group and
dilaton t... | hep-lat |
Fermions as global correction in lattice QCD: The fermion determinant is a highly non-local object and its logarithm is an
extensive quantity. For these reasons it is widely believed that the
determinant cannot be treated in acceptance steps of gauge link configurations
that differ in a large fraction of the links. How... | hep-lat |
Self-Avoiding Gonihedric Srting and Spin Systems: We classify different theories of self-intersecting random surfaces assigning
special weights to intersections. When self-intersection coupling constant
$\kappa$ tends to zero, then the surface can freely inetrsect and it is
completely self-avoiding when $\kappa$ tends ... | hep-lat |
Induced representations of Poincare group on the lattice: spin 1/2 and 1
case: Following standard methods we explore the construction of the discrete
Poincare group, the semidirect product of discrete translations and integral
Lorentz transformations, using the Wigner-Mackey construction restricted to the
momentum an... | hep-lat |
On ambiguities of sign determination of the S-matrix from energy levels
in a finite box: In a recent paper the authors make a study on the determination of the
S-matrix elements for scattering of particles in the infinite volume from the
energy levels in the finite box for the case of multiple channels. The study is
... | hep-lat |
Exact chiral symmetry on the lattice and the Ginsparg-Wilson relation: It is shown that the Ginsparg-Wilson relation implies an exact symmetry of
the fermion action, which may be regarded as a lattice form of an infinitesimal
chiral rotation. Using this result it is straightforward to construct lattice
Yukawa models wi... | hep-lat |
A precise determination of T_c in QCD from scaling: Existing lattice data on the QCD phase transition are analyzed in
renormalized perturbation theory. In quenched QCD it is found that T_c scales
for lattices with only 3 time slices, and that T_c/Lambda_msbar=1.15 \pm 0.05.
A preliminary estimate in QCD with two flavou... | hep-lat |
Accelerating Staggered Fermion Dynamics with the Rational Hybrid Monte
Carlo (RHMC) Algorithm: Improved staggered fermion formulations are a popular choice for lattice QCD
calculations. Historically, the algorithm used for such calculations has been
the inexact R algorithm, which has systematic errors that only vanis... | hep-lat |
Preliminary results of $ΔI=1/2$ and $3/2$, $K$ to $ππ$ Decay
Amplitudes from Lattice QCD: We report a direct lattice calculation of the $K$ to $\pi\pi$ decay matrix
elements for both $\Delta I=1/2$ and $3/2$ channels on 2+1 flavor, domain wall
fermion, $16^3\times32$ lattices with zero $\pi\pi$ relative momentum and
... | hep-lat |
Large-N reduction with two adjoint Dirac fermions: We study the single site SU(N) lattice gauge theory with N_f=2 adjoint Wilson
fermions for values of N up to 53. We determine the phase diagram of the theory
as a function of the hopping parameter kappa and the inverse 't Hooft coupling
b, searching for the region in w... | hep-lat |
Physical properties of Polyakov loop geometrical clusters in SU(2)
gluodynamics: We apply the liquid droplet model to describe the clustering phenomenon in
SU(2) gluodynamics, especially, in the vicinity of the deconfinement phase
transition. In particular, we analyze the size distributions of clusters formed
by the ... | hep-lat |
Lattice study of the chiral magnetic effect in a chirally imbalanced
matter: We investigate the chiral magnetic effect by lattice QCD with a chiral
chemical potential. In a chirally imbalanced matter, we obtain a finite induced
current along an external magnetic field. We analyze the dependence on the
lattice spacing... | hep-lat |
On Dirac Zero Modes in Hyperdiamond Model: Using the SU(5) symmetry of the 4D hyperdiamond and results on the study of
4D graphene given in "Four Dimensional Graphene" (L.B Drissi, E.H Saidi, M.
Bousmina, CPM-11-01, Phys. Rev. D (2011)), we engineer a class of 4D lattice
QCD fermions whose Dirac operators have two zero... | hep-lat |
From deep inelastic scattering to heavy-flavor semi-leptonic decays:
Total rates into multi-hadron final states from lattice QCD: We present a new technique for extracting decay and transition rates into
final states with any number of hadrons. The approach is only sensitive to
total rates, in which all out-states wi... | hep-lat |
Pion electric polarizability from lattice QCD: Electromagnetic polarizabilities are important parameters for understanding
the interaction between photons and hadrons. For pions these quantities are
poorly constrained experimentally since they can only be measured indirectly.
New experiments at CERN and Jefferson Lab a... | hep-lat |
K->pi form factors with reduced model dependence: Using partially twisted boundary conditions we compute the K->pi
semi-leptonic form factors in the range of momentum transfers 0 <~ q^2 <=
q^2_{max}=(mK-mpi)^2 in lattice QCD with N_f=2+1 dynamical flavours. In this
way we are able to determine f+(0) without any interpo... | hep-lat |
Distributions of the Phase Angle of the Fermion Determinant in QCD: The distribution of the phase angle and the magnitude of the fermion
determinant as well as its correlations with the baryon number and the chiral
condensate are studied for QCD at non zero quark chemical potential. Results
are derived to one-loop orde... | hep-lat |
Numerical tests of the electroweak phase transition and thermodynamics
of the electroweak plasma: The finite temperature phase transition in the SU(2) Higgs model at a Higgs
boson mass $M_H \simeq 34$ GeV is studied in numerical simulations on
four-dimensional lattices with time-like extensions up to $L_t=5$. The eff... | hep-lat |
Semileptonic $B$-meson decays to light pseudoscalar mesons on the HISQ
ensembles: We report the status of an ongoing lattice-QCD calculation of form factors
for exclusive semileptonic decays of $B$ mesons with both charged currents
($B\to\pi\ell\nu$, $B_s\to K\ell\nu$) and neutral currents
($B\to\pi\ell^+\ell^-$, $B\... | hep-lat |
Study of spatial meson correlators at finite temperature in quenched
anisotropic lattice QCD: We analyze the meson correlator in the spatial direction at finite
temperature. To achieve fine resolution in the spatial direction, we use an
anisotropic lattice with the standard Wilson plaquette gauge action and the
$O(a)... | hep-lat |
Chiral behavior of $K \to πl ν$ decay form factors in lattice QCD
with exact chiral symmetry: We calculate the form factors of the $K \to \pi l \nu$ semileptonic decays in
three-flavor lattice QCD, and study their chiral behavior as a function of the
momentum transfer and the Nambu-Goldstone boson masses. Chiral symm... | hep-lat |
K-meson vector and tensor decay constants and BK-parameter from Nf=2
tmQCD: We present work in progress on the computation of the K-meson vector and
tensor decay constants, as well as the B-parameter in Kaon oscillations. Our
simulations are performed in a partially quenched setup, with two dynamical
(sea) Wilson qua... | hep-lat |
Better Domain-Wall Fermions: We discuss two modifications of domain-wall fermions, aimed to reduce the
chiral-symmetry violations presently encountered in numerical simulations. | hep-lat |
Effective Polyakov line actions, and their solutions at finite chemical
potential: I outline recent progress in the relative weights approach to deriving
effective Polyakov line actions from an underlying lattice gauge theory, and
compare mean field and complex Langevin methods for solving such theories at
finite che... | hep-lat |
Locality and exponential error reduction in numerical lattice gauge
theory: In non-abelian gauge theories without matter fields, expectation values of
large Wilson loops and loop correlation functions are difficult to compute
through numerical simulation, because the signal-to-noise ratio is very rapidly
decaying for... | hep-lat |
A new phase in the Lorentzian type IIB matrix model and the emergence of
continuous space-time: The Lorentzian type IIB matrix model is a promising candidate for a
non-perturbative formulation of superstring theory. In previous studies, Monte
Carlo calculations provided interesting results indicating the spontaneous
... | hep-lat |
Lattice 2001: Reflections: A few subjects which strongly intertwine our field are discussed: K --> Pi Pi
decay, chiral symmetry on the lattice and a few other selected topics. Open
questions are touched also on perturbation theory, locality, Gribov copies, CP
symmetry in chiral gauge theories and cut-off effects. | hep-lat |
Properties of light pseudoscalars from lattice QCD with HISQ ensembles: We fit lattice-QCD data for light-pseudoscalar masses and decay constants,
from HISQ configurations generated by MILC, to SU(3) staggered chiral
perturbation theory. At present such fits have rather high values of
chi^2/d.o.f., possibly due to the ... | hep-lat |
Solutions of the Ginsparg-Wilson relation and improved domain wall
fermions: We discuss a number of lattice fermion actions solving the Ginsparg-Wilson
relation. We also consider short ranged approximate solutions. In particular,
we are interested in reducing the lattice artifacts, while avoiding (or
suppressing) add... | hep-lat |
Decomposition of the static potential in the Maximal Abelian gauge: Decomposition of SU(2) gauge field into the monopole and monopoleless
components is studied in the Maximal Abelian gauge using Monte-Carlo
simulations in lattice SU(2) gluodynamics as well as in two-color QCD with both
zero and nonzero quark chemical p... | hep-lat |
Large $N$ scaling and factorization in $\mathrm{SU}(N)$ Yang-Mills
theory: We present results for Wilson loops smoothed with the Yang-Mills gradient
flow and matched through the scale $t_0$. They provide renormalized and precise
operators allowing to test the $1/N^2$ scaling both at finite lattice spacing
and in the ... | hep-lat |
The Charge and Matter radial distributions of Heavy-Light mesons
calculated on a lattice: For a heavy-light meson with a static heavy quark, we can explore the light
quark distribution. The charge and matter radial distributions of these
heavy-light mesons are measured on a 16^3 * 24 lattice at beta=5.7 and a
hopping... | hep-lat |
Probes of nearly conformal behavior in lattice simulations of minimal
walking technicolor: We present results from high precision, large volume simulations of the
lattice gauge theory corresponding to minimal walking technicolor. We find
evidence that the pion decay constant vanishes in the infinite volume limit and
... | hep-lat |
The compact Q=2 Abelian Higgs model in the London limit: vortex-monopole
chains and the photon propagator: The confining and topological properties of the compact Abelian Higgs model
with doubly-charged Higgs field in three space-time dimensions are studied. We
consider the London limit of the model. We show that the... | hep-lat |
Dual formulations of Polyakov loop lattice models: Dual representations are constructed for non-abelian lattice spin models with
U(N) and SU(N) symmetry groups, for all N and in any dimension. These models
are usually related to the effective models describing the interaction between
Polyakov loops in the strong couple... | hep-lat |
Universality and Scaling at the chiral transition in two-flavor QCD at
finite temperature: The order of the phase transition in finite-temperature QCD with two
degenerate light quarks is still an open problem and corresponds to the last
question mark in the zero-density phase diagram of QCD. We argue that
establishin... | hep-lat |
Lattice QCD study on $K^\ast(892)$ meson decay width: We deliver an exploratory lattice QCD examination of the $K^\ast(892)$ meson
decay width with the help of the p-wave scattering phase $\delta_1$ of
pion-kaon ($\pi K$) system in the isospin $I=1/2$ channel, which are extracted
by the modified Rummukainen-Gottlieb fo... | hep-lat |
Matching coefficients for improved staggered bilinears: We calculate one-loop matching factors for bilinear operators composed of
improved staggered fermions. We compare the results for different improvement
schemes used in the recent literature, including the HYP action and an action
close to the Asqtad action. We fin... | hep-lat |
Covariant gauge on the lattice: a new implementation: We derive a new implementation of linear covariant gauges on the lattice,
based on a minimizing functional that can be interpreted as the Hamiltonian of
a spin-glass model in a random external magnetic field. We show that our method
solves most problems encountered ... | hep-lat |
New insight in the 2-flavor Schwinger model based on lattice simulations: We consider the Schwinger model with two degenerate, light fermion flavors by
means of lattice simulations. At finite temperature, we probe the viability of
a bosonization method by Hosotani et al. Next we explore an analogue to the
pion decay co... | hep-lat |
Perfect Lattice Topology: The Quantum Rotor as a Test Case: Lattice actions and topological charges that are classically and quantum
mechanically perfect (i.e. free of lattice artifacts) are constructed
analytically for the quantum rotor. It is demonstrated that the Manton action
is classically perfect while the Villai... | hep-lat |
Two-color QCD with staggered fermions at finite temperature under the
influence of a magnetic field: In this paper we investigate the influence of a constant external magnetic
field on the finite-temperature phase structure and the chiral properties of a
simplified lattice model for QCD. We assume an SU(2) gauge symm... | hep-lat |
Observing instantons directly on the lattice without cooling: Based on the study of the simple Abelian Higgs model in $1+1$ dimensions we
will present a new method to identify and localize extended instantons. The
idea is to measure the topological charge on regions somewhat larger than the
extended instantons so as to... | hep-lat |
Staggered Baryon Operators with Flavor SU(3) Quantum Numbers: The construction of the first baryon operators for staggered lattice QCD
exploited the taste symmetry to emulate physical quark flavor; contemporary 2+1
flavor simulations explicitly include three physical quark flavors and
necessitate interpreting a valence... | hep-lat |
Renormalization of the effective theory for heavy quarks at small
velocity: The slope of the Isgur-Wise function at the normalization point,
$\xi^{(1)}(1)$,is one of the basic parameters for the extraction of the $CKM$
matrix element $V_{cb}$ from exclusive semileptonic decay data. A method for
measuring this paramet... | hep-lat |
Power-counting theorem for staggered fermions: Lattice power-counting is extended to QCD with staggered fermions. As
preparation, the difficulties encountered by Reisz's original formulation of
the lattice power-counting theorem are illustrated. One of the assumptions that
is used in his proof does not hold for stagger... | hep-lat |
Universal critical behavior and the transition temperature in
(2+1)-flavor QCD: We discuss the universal critical behavior in (2+1)-flavor QCD by analyzing
lattice data from improved staggered fermions generated by the HotQCD
Collaboration. We present recent results from two different lattice
discretizations and vari... | hep-lat |
Computing the static potential using non-string-like trial states: We present a method for computing the static quark-antiquark potential, which
is not based on Wilson loops, but where the trial states are formed by
eigenvector components of the covariant lattice Laplace operator. We have
tested this method in SU(2) Ya... | hep-lat |
B- and D-meson decay constants from three-flavor lattice QCD: We calculate the leptonic decay constants of B_{(s)} and D_{(s)} mesons in
lattice QCD using staggered light quarks and Fermilab bottom and charm quarks.
We compute the heavy-light meson correlation functions on the MILC
asqtad-improved staggered gauge confi... | hep-lat |
Light hadron spectrum and quark masses: Recent developments in lattice QCD calculations of the light hadron spectrum
and quark masses are reviewed. | hep-lat |
Calculating the Two-photon Contribution to $π^0 \rightarrow e^+ e^-$
Decay Amplitude: We develop a new method that allows us to deal with two-photon intermediate
states in a lattice QCD calculation. We apply this method to perform a
first-principles calculation of the $\pi^0 \rightarrow e^+ e^-$ decay
amplitude. Both... | hep-lat |
Operator product expansion and the short distance behavior of 3-flavor
baryon potentials: The short distance behavior of baryon-baryon potentials defined through
Nambu-Bethe-Salpeter wave functions is investigated using the operator product
expansion. In a previous analysis of the nucleon-nucleon case, corresponding ... | hep-lat |
Current Status of Indirect CP Violation in Neutral Kaon System: In the standard model (SM), the CP violation is introduced through a single
phase in the CKM matrix. The neutral kaon system is one of the most precise
channels to test how the SM theory describes the experiment data such as
$\epsilon_K$ accurately. The in... | hep-lat |
On the entropy bound of three dimensional simplicial gravity: It is proven that the partition function of 3-dimensional simplicial gravity
has an exponential upper bound with the following assumption: any three
dimensional sphere $S^3$ is constructed by repeated identification of
neighboring links and neighboring trian... | hep-lat |
Density of states for gravitational waves: We present ongoing investigations of the first-order confinement transition
of a composite dark matter model, to predict the resulting spectrum of
gravitational waves. To avoid long autocorrelations at the first-order
transition, we employ the Logarithmic Linear Relaxation (LL... | hep-lat |
Mitigating topological freezing using out-of-equilibrium simulations: Motivated by the recently-established connection between Jarzynski's equality
and the theoretical framework of Stochastic Normalizing Flows, we investigate a
protocol relying on out-of-equilibrium lattice Monte Carlo simulations to
mitigate the infam... | hep-lat |
Higgs boson mass bounds in the presence of a very heavy fourth quark
generation: We study the effect of a potential fourth quark generation on the upper and
lower Higgs boson mass bounds. This investigation is based on the numerical
evaluation of a chirally invariant lattice Higgs-Yukawa model emulating the
same Higg... | hep-lat |
Using Gradient Flow to Renormalise Matrix Elements for Meson Mixing and
Lifetimes: Neutral meson mixing and meson lifetimes are theory-side parametrised in
terms four-quark operators which can be determined by calculating weak decay
matrix elements using lattice Quantum Chromodynamics. While calculations of
meson mix... | hep-lat |
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