Results 41 to 50 of about 274,150 (265)
In-medium pion valence distributions in a light-front model
Physics Letters B, 2017 Pion valence distributions in nuclear medium and vacuum are studied in a light-front constituent quark model. The in-medium input for studying the pion properties is calculated by the quark-meson coupling model.
J.P.B.C. de Melo, K. Tsushima, I. Ahmed
doaj +1 more source
The pion charge radius from charged pion electroproduction [PDF]
, 2000 We analyze a low-energy theorem of threshold pion electroproduction which allows one to determine the charge radius of the pion. We show that at the same order where the radius appears, pion loops induce a correction to the momentum dependence of the ...
A. Liesenfeld +13 more
core +2 more sources
First direct lattice-QCD calculation of the x -dependence of the pion parton distribution function [PDF]
Physical Review D, 2018 We present the first direct lattice-QCD calculation of the Bjorken-$x$ dependence of the valence quark distribution in the pion. Using large-momentum effective theory (LaMET), we calculate the boosted pion state with long Wilson link operators.
Jian-Hui Zhang +5 more
semanticscholar +1 more source
Vector form factor of the pion : A model-independent approach [PDF]
, 2002 We study a model-independent parameterization of the vector pion form factor that arises from the constraints of analyticity and unitarity. Our description should be suitable up to s^(1/2) ~ 1.2 GeV and allows a model-independent determination of the ...
A. Pich +26 more
core +3 more sources
Bootstrapping QCD Using Pion Scattering Amplitudes. [PDF]
Physical Review Letters, 2018 We consider the S-matrix bootstrap of four-dimensional scattering amplitudes with O(3) symmetry and no bound states. We explore the allowed space of scattering lengths which parametrize the interaction strength at threshold of the various scattering ...
A. Guerrieri, J. Penedones, P. Vieira
semanticscholar +1 more source
Generalized parton distributions of pion for non-zero skewness in AdS/QCD
Nuclear Physics B, 2018 We study the generalized parton distributions (GPDs) of pion for non-zero skewness by considering the leading |qq¯〉 Fock state component. Inspired from AdS/QCD light-front wave functions, we calculate the pion GPDs.
Navdeep Kaur +3 more
doaj +1 more source
Transverse pion structure beyond leading twist in constituent models [PDF]
, 2016 The understanding of the pion structure as described in terms of transverse-momentum dependent parton distribution functions (TMDs) is of importance for the interpretation of currently ongoing Drell-Yan experiments with pion beams.
Lorcé, C., Pasquini, B., Schweitzer, P.
core +3 more sources
Pion distribution amplitude from Euclidean correlation functions: Exploring universality and higher-twist effects [PDF]
Physical Review D, 2018 Building upon our recent study [G. S. Bali et al., Eur. Phys. J. C 78, 217 (2018)], we investigate the feasibility of calculating the pion distribution amplitude from suitably chosen Euclidean correlation functions at large momentum.
G. Bali +9 more
semanticscholar +1 more source
Pion wave-function as a bound system in 3 + 1 dimensional QCD
Results in Physics, 2017 We investigate the Bethe-Salpeter-like amplitude in 3 + 1 dimensions. This involves a system comprising a quark and an antiquark combined by gauge fields to satisfy gauge invariance. We derive the equation of motion for this system and construct a series
Teruo Kurai
doaj +1 more source
Constraining axionlike particles from rare pion decays [PDF]
Physical Review D, 2019 Ultraviolet completions for axion-like particles (ALPs) lighter than the neutral pion generically induce ALP-neutral pion mixing, and are therefore sensitive to direct constraints on the mixing angle.
W. Altmannshofer, S. Gori, D. Robinson
semanticscholar +1 more source