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We propose an extended Quantum Chromodynamics (XQCD) Lagrangian in which the fermions are coupled to elementary scalar %$\sigma$ and $\pi$ fields through a Yukawa coupling which preserves chiral invariance. Our principle motivation is to…

高能物理 - 格点 · 物理学 2009-10-22 Richard C. Brower , Yue Shen , Chung-I Tan

We perform numerical simulations of lattice QCD with two flavors of dynamical overlap quarks, which have exact chiral symmetry on the lattice. While this fermion discretization is computationally demanding, we demonstrate the feasibility to…

We propose a Bayesian approach using improper priors for hierarchical linear mixed models with flexible random effects and residual error distributions. The error distribution is modelled using scale mixtures of normals, which can capture…

统计方法学 · 统计学 2018-02-06 F. J. Rubio , M. F. J. Steel

Many real-life applications involve estimation of curves that exhibit complicated shapes including jumps or varying-frequency oscillations. Practical methods have been devised that can adapt to a locally varying complexity of an unknown…

统计理论 · 数学 2021-05-28 Veronika Rockova , Judith Rousseau

We use the BLM method to fix the renormalization scale of the QCD coupling in exclusive hadronic amplitudes such as the pion form factor and the photon-to-pion transition form factor at large momentum transfer.…

高能物理 - 唯象学 · 物理学 2008-11-26 S. J. Brodsky , C. -R. Ji , A. Pang , D. G. Robertson

Due to their conjugate posteriors, Gaussian process priors are attractive for estimating the drift of stochastic differential equations with continuous time observations. However, their performance strongly depends on the choice of the…

统计理论 · 数学 2020-02-04 Jan van Waaij

We present a detailed study of the applications of two stochastic approaches, stochastic optimization method (SOM) and stochastic analytical inference (SAI), to extract spectral functions from Euclidean correlation functions. SOM has the…

高能物理 - 格点 · 物理学 2018-05-30 Heng-Tong Ding , Olaf Kaczmarek , Swagato Mukherjee , Hiroshi Ohno , Hai-Tao Shu

A method is described for predicting extremes values beyond the span of historical data. The method - based on extending a curve fitted to a location- and scale-invariant variation of the double-logarithmic QQ-plot - is simple and…

统计理论 · 数学 2014-08-08 Allan McRobie

We construct a number of lattice fermions, which fulfill the Ginsparg-Wilson relation either exactly or approximately, and test them in the framework of the 2-flavor Schwinger model. We start from explicit approximations within a short…

高能物理 - 格点 · 物理学 2010-11-19 W. Bietenholz , I. Hip

Spatial econometric research typically relies on the assumption that the spatial dependence structure is known in advance and is represented by a deterministic spatial weights matrix. Contrary to classical approaches, we investigate the…

统计计算 · 统计学 2023-10-24 Miryam S. Merk , Philipp Otto

In the setting of high-dimensional linear models with Gaussian noise, we investigate the possibility of confidence statements connected to model selection. Although there exist numerous procedures for adaptive point estimation, the…

统计理论 · 数学 2009-10-07 Angelika Rohde , Lutz Duembgen

Approximations are commonly employed in realistic applications of scientific Bayesian inference, often due to convenience if not necessity. In the field of gravitational-wave (GW) data analysis, fast-to-evaluate but approximate waveform…

广义相对论与量子宇宙学 · 物理学 2024-04-03 Ruiting Mao , Jeong Eun Lee , Ollie Burke , Alvin J. K. Chua , Matthew C. Edwards , Renate Meyer

The efficient and accurate simulation of material systems with defects using atomistic- to-continuum (a/c) coupling methods is a topic of considerable interest in the field of computational materials science. To achieve the desired balance…

数值分析 · 数学 2023-09-01 Yangshuai Wang

The Microcanonical Fermionic Average method has been used so far in the context of lattice models with phase transitions at finite coupling. To test its applicability to Asymptotically Free theories, we have implemented it in QED$_2$, \it…

高能物理 - 格点 · 物理学 2009-10-22 V. Azcoiti , G. Di Carlo , A. Galante , A. F. Grillo , V. Laliena

State-of-the-art simulations of discrete gauge theories are based on Markov chains with local changes in the field space, which however at very fine lattice spacings are notoriously difficult due to separated topological sectors of the…

高能物理 - 格点 · 物理学 2024-02-20 Jacob Finkenrath

We propose a new empirical Bayes approach for inference in the $p \gg n$ normal linear model. The novelty is the use of data in the prior in two ways, for centering and regularization. Under suitable sparsity assumptions, we establish a…

统计理论 · 数学 2018-12-06 Ryan Martin , Raymond Mess , Stephen G. Walker

In this work, we systematically assess the performance of a new method from [H. Shah et al., Phys. Rev. C 113, L012201] for locating the QCD critical point using constant-entropy contours by testing it against various effective QCD…

高能物理 - 唯象学 · 物理学 2026-01-14 Hitansh Shah , Mauricio Hippert , Jorge Noronha , Claudia Ratti , Volodymyr Vovchenko

This article describes a full Bayesian treatment for simultaneous fixed-effect selection and parameter estimation in high-dimensional generalized linear mixed models. The approach consists of using a Bayesian adaptive Lasso penalty for…

统计方法学 · 统计学 2016-08-31 Dao Thanh Tung , Minh-Ngoc Tran , Tran Manh Cuong

Stochastic reduced models are an important tool in climate systems whose many spatial and temporal scales cannot be fully discretized or underlying physics may not be fully accounted for. One form of reduced model, the linear inverse model…

统计方法学 · 统计学 2020-04-29 Dallas Foster , Darin Comeau , Nathan M. Urban

We carry out a finite density calculation based on a canonical approach which is designed to address the overlap problem. Two degenerate flavor simulations are performed using Wilson gauge action and Wilson fermions on $4^4$ lattices, at…

高能物理 - 格点 · 物理学 2016-08-16 Andrei Alexandru , Manfried Faber , Ivan Horváth , Keh-Fei Liu