Results 101 to 110 of about 220,545 (228)

Nonperturbative partonic quasidistributions of the pion from chiral quark models

open access: yesPhysics Letters B, 2017
We evaluate nonperturbatively the quark quasidistribution amplitude and the valence quark quasidistribution function of the pion in the framework of chiral quark models, namely the Nambu–Jona-Lasinio model and the Spectral Quark Model.
Wojciech Broniowski   +1 more
doaj  

Sigma terms in Pion Weak-production near Threshold by Charged Current

open access: yesEPJ Web of Conferences, 2012
We investigated pion production by charged weak current, which comprises vector and axial vector current. In particular, the contribution by the axial vector current is detailed at the pion threshold in terms of multipole amplitudes, which are useful ...
Cheoun Myung-Ki
doaj   +1 more source

Chiral extrapolation of hadronic vacuum polarization

open access: yesPhysics Letters B, 2022
We study the pion-mass dependence of the two-pion channel in the hadronic-vacuum-polarization (HVP) contribution to the anomalous magnetic moment of the muon aμHVP, by using an Omnès representation for the pion vector form factor with the phase shift ...
Gilberto Colangelo   +4 more
doaj  

Pion-pion and pion-nucleon interactions in chiral perturbation theory [PDF]

open access: yes, 2008
Elastic pion-pion and pion-nucleon scattering are reviewed in the context of chiral perturbation theory. Theoretical results from systematic low-energy expansions to O(p^6) for pion-pion and to O(p^3) for pion-nucleon scattering are compared with experimental data. Possible future developments are outlined.
openaire   +3 more sources

Pion transverse-momentum spectrum and elliptic anisotropy of partially coherent source

open access: yesPhysics Letters B, 2018
In this letter, we study the pion momentum distribution of a coherent source and investigate the influences of coherent emission on the pion transverse-momentum (pT) spectrum and elliptic anisotropy.
Peng Ru, Ghulam Bary, Wei-Ning Zhang
doaj  

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