Article
Astronomy & Astrophysics
Luis Altenkort, Alexander M. Eller, O. Kaczmarek, Lukas Mazur, Guy D. Moore, Hai-Tao Shu
Summary: The proposed method significantly improves the signal-to-noise ratio of lattice correlation functions for bosonic operators by breaking each plane into bins and computing bin-bin correlations. Experimental results show noise reductions of around 3-7 times compared to the conventional approach on the same ensemble of configurations.
Article
Physics, Particles & Fields
Marco Ce, Tim Harris, Harvey B. Meyer, Arianna Toniato, Csaba Torok
Summary: In order to precisely determine the electromagnetic coupling at the Z pole, researchers are non-perturbatively computing the hadronic vacuum polarization and connecting it with perturbation theory. They are addressing challenges of controlling discretization errors at short distances by using static screening correlators in the high-temperature phase of QCD without bias. The method is motivated by the observation that high-temperature simulations are more cost-effective than vacuum simulations, and the operator-product expansion guarantees a power-suppressed deviation between thermal and vacuum correlators at short distances.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Peter Petreczky, Sayantan Sharma, Johannes Heinrich Weber
Summary: This study focuses on the screening masses of bottomonium in a 2 + 1 flavor QCD, with calculations performed at various temperatures to determine the melting points of different states. The results reveal that eta(b)(1S) and Upsilon(1S) states melt at temperatures above 500 MeV, while chi(b0)(1P) and h(b)(1P) states melt at temperatures above 350 MeV.
Article
Astronomy & Astrophysics
Tyler D. Blanton, Stephen R. Sharpe
Summary: This paper discusses the scattering amplitudes of three-particle systems consisting of two identical particles and a different particle, deriving the formalism needed to extract these amplitudes. By using a relativistic formalism and diagrammatic analysis, the spectrum and scattering amplitudes of such systems are studied.
Article
Physics, Particles & Fields
Joseph Karpie, Kostas Orginos, Anatoly Radyushkin, Savvas Zafeiropoulos
Summary: In this study, continuum limit results for the unpolarized parton distribution function of the nucleon in lattice QCD are presented. The pseudo-PDF approach with Short Distance Factorization was utilized for the first time, and findings were compared with phenomenological determinations. The sGEVP technique was employed to optimize control over excited state contamination in calculations.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Colin Egerer, Christos Kallidonis, Joseph Karpie, Nikhil Karthik, Christopher J. Monahan, Wayne Morris, Kostas Orginos, Anatoly Radyushkin, Eloy Romero, Raza Sabbir Sufian, Savvas Zafeiropoulos
Summary: We determined the nonsinglet transversity parton distribution function (PDF) of the nucleon using lattice quantum chromodynamics. By analyzing the short-distance behavior and using the matching coefficients, we extracted the transversity PDF and studied its x-dependence through an expansion in Jacobi polynomials. Comparing our estimate with global fit results based on single transverse spin asymmetry, we found that the nucleon sea is isospin symmetric with respect to transversity.
Article
Hospitality, Leisure, Sport & Tourism
E. Gomez-Deniz, N. Davila-Cardenes, J. Boza-Chirino
Summary: This paper introduces a reparameterization of the three-parameter log-skew normal distribution for modelling tourism expenditure, which fits satisfactorily in all parts of the empirical distribution and captures skewness and kurtosis, as well as the long tail to the right present in practice.
CURRENT ISSUES IN TOURISM
(2022)
Article
Astronomy & Astrophysics
Zachary T. Draper, Stephen R. Sharpe
Summary: This study investigates pion-pion scattering in partially-quenched twisted-mass lattice QCD, revealing issues related to discretization errors and violation of unitarity. It proposes a systematic solution for reducing discretization errors by calculating the I = 2 scattering amplitude, while indicating that the error from the violation of unitarity is challenging to minimize in practice.
Article
Mathematics
Tzong-Ru Tsai, Yuhlong Lio, Ya-Yen Fan, Che-Pin Cheng
Summary: This article investigates the performance of the maximum likelihood estimation method for the log-power-normal distribution in terms of point and interval inferences. A simple bias correction method is proposed to improve the estimation performance, using the bootstrap method. Monte Carlo simulations validate the effectiveness of the proposed bias correction method, and two real examples are provided for illustration.
Article
Physics, Multidisciplinary
Jun Hua, Min-Huan Chu, Peng Sun, Wei Wang, Ji Xu, Yi-Bo Yang, Jian-Hui Zhang, Qi-An Zhang
Summary: This study presents the first lattice QCD calculation of the distribution amplitudes of longitudinally and transversely polarized vector mesons K* and phi using large momentum effective theory. The results show that while the longitudinal distribution amplitudes tend to be close to the asymptotic form, the transverse ones deviate rather significantly from the asymptotic form. The final results provide crucial ab initio theory inputs for analyzing pertinent exclusive processes.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Chien-Yeah Seng, Vincenzo Cirigliano, Xu Feng, Mikhail Gorchtein, Luchang Jin, Gerald A. Miller
Summary: Recent estimates suggest that the strong isospin-symmetry breaking (ISB) corrections to the Fermi matrix element in free neutron decay may be one order of magnitude larger than the naive estimate based on a theorem. To investigate this claim, we derive a general expression for the leading ISB correction to hadronic Fermi matrix elements, which can be computed from first principles. Our formalism opens up the possibility of determining this correction in the neutron sector with fully-controlled theory uncertainties.
Article
Astronomy & Astrophysics
Marco Bochicchio, Mauro Papinutto, Francesco Scardino
Summary: This study calculates the ultraviolet asymptotics of the generating functional of Euclidean correlators and provides a perturbative explanation for its logarithmic structure. By carefully choosing the renormalization scheme, the generating functional is lifted to the renormalization-group improved correlators, which also exhibit the structure of a logarithm of a functional determinant. These findings set strong constraints on the nonperturbative solution of large-N Yang-Mills theory.
Article
Physics, Multidisciplinary
Zheng-Yang Li, Yan-Qing Ma, Jian-Wei Qiu
Summary: This study introduces complete next-to-next-to-leading-order coefficient functions to match flavor nonsinglct quark correlation functions in position space to parton distribution functions (PDFs), making predictions for valence-quark correlation functions. By performing Fourier transformation, matching coefficients for corresponding quasi-PDFs and pseudo-PDFs are obtained. The calculations can be generalized to evaluate matching coefficients for sea-quark and gluon correlation functions.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Huey-Wen Lin
Summary: This study presents the lattice QCD calculation of the x-dependent pion valence-quark generalized parton distribution (GPD) directly at physical pion mass. The results show consistent agreement with past lattice QCD and experimental determinations, and also predict higher GPD moments.
Article
Astronomy & Astrophysics
M. G. Echevarria, I. L. Egusquiza, E. Rico, G. Schnell
Summary: This paper introduces a quantum algorithm for performing quantum simulation of different nonperturbative parton correlators in high-energy collider physics, illustrated by considering a space-time Wilson loop, and discusses the implementation of the algorithm in actual quantum technologies.
Article
Computer Science, Interdisciplinary Applications
David Schaich, Thomas De Grand
COMPUTER PHYSICS COMMUNICATIONS
(2015)
Article
Astronomy & Astrophysics
Thomas DeGrand, Yigal Shamir
Article
Astronomy & Astrophysics
Thomas DeGrand, Yuzhi Liu, Ethan T. Neil, Yigal Shamir, Benjamin Svetitsky
Article
Physics, Multidisciplinary
Thomas DeGrand
REVIEWS OF MODERN PHYSICS
(2016)
Article
Astronomy & Astrophysics
Thomas DeGrand
Summary: The numerical study focused on the crossover between the low temperature chirally broken phase and the high temperature chirally restored phase in SU(N-c) gauge theory with varying fermion masses across different colors. Results showed that the temperature-dependent chiral condensate and screening masses exhibited similar temperature dependence across different colors for each fermion mass studied.
Article
Astronomy & Astrophysics
Thomas DeGrand
Article
Astronomy & Astrophysics
Thomas DeGrand, Ethan T. Neil
Article
Astronomy & Astrophysics
Venkitesh Ayyar, Thomas DeGrand, Daniel C. Hackett, William Jay, Ethan T. Neil, Yigal Shamir, Benjamin Svetitsky
Article
Astronomy & Astrophysics
Venkitesh Ayyar, Thomas DeGrand, Daniel C. Hackett, William I. Jay, Ethan T. Neil, Yigal Shamir, Benjamin Svetitsky
Article
Astronomy & Astrophysics
Venkitesh Ayyar, Thomas DeGrand, Daniel C. Hackett, William I. Jay, Ethan T. Neil, Yigal Shamir, Benjamin Svetitsky
Article
Astronomy & Astrophysics
Venkitesh Ayyar, Thomas DeGrand, Maarten Golterman, Daniel C. Hackett, William I. Jay, Ethan T. Neil, Yigal Shamir, Benjamin Svetitsky
Article
Astronomy & Astrophysics
Thomas DeGrand
Article
Astronomy & Astrophysics
Thomas DeGrand, Maarten Golterman, William I. Jay, Ethan T. Neil, Yigal Shamir, Benjamin Svetitsky
Article
Astronomy & Astrophysics
Thomas DeGrand, Yuzhi Liu
Article
Astronomy & Astrophysics
Thomas DeGrand, Maarten Golterman, Ethan T. Neil, Yigal Shamir
