Results 1 to 10 of about 27,503 (218)

The role of meson exchanges in light-by-light scattering

open access: yesPhysics Letters B, 2017
We discuss the role of meson exchange mechanisms in γγ→γγ scattering. Several pseudoscalar (π0, η, η′(958), ηc(1S), ηc(2S)), scalar (f0(500), f0(980), a0(980), f0(1370), χc0(1P)) and tensor (f2(1270), a2(1320), f2′(1525), f2(1565), a2(1700)) mesons are ...
Piotr Lebiedowicz, Antoni Szczurek
doaj   +4 more sources

Pseudoscalars and the η′ in the holographic soft-wall model [PDF]

open access: yesEPJ Web of Conferences, 2022
Pseudoscalar mesons and glueballs are studied in a model based on the AdS/QCD correspondence. Glueball masses are obtained in the pure-gauge case, while the mixing between pseudoscalar glueballs and singlet pseudoscalar mesons produces the expected mass ...
Giannuzzi Floriana, Nicotri Stefano
doaj   +1 more source

Poincaré-covariant quark model of electroweak light mesons decays [PDF]

open access: yesEPJ Web of Conferences, 2019
The procedure for obtaining the radiative decay constants of pseudoscalar and vector unflavored mesons in point–form of Poincaré-invariant quantum mechanics is presented.
Andreev Viktor, Haurysh Vadzim
doaj   +1 more source

Determining dominant partial waves in photoproduction via moment analysis [PDF]

open access: yesEPJ Web of Conferences, 2020
Important insights into the excitation spectra of baryons are provided by measurements of polarization observables in reactions that involve particles with spin.
Wunderlich Yannick
doaj   +1 more source

Two and three pseudoscalar production in e + e − annihilation and their contributions to (g − 2) μ

open access: yesJournal of High Energy Physics, 2021
A coherent study of e + e − annihilation into two (π + π − , K + K − ) and three (π + π − π 0 , π + π − η) pseudoscalar meson production is carried out within the framework of resonance chiral theory in energy region E ≲ 2 GeV. The work of [L.Y.
Wen Qin, Ling-Yun Dai, Jorge Portolés
doaj   +1 more source

SU(3) analysis of fully-light tetraquarks in heavy meson weak decays

open access: yesEuropean Physical Journal C: Particles and Fields, 2021
We perform a SU(3) analysis for both semi-leptonic and non-leptonic heavy meson weak decays into a pseudoscalar meson and a fully-light tetraquark in 10 or 27 representation.
Yu-Ji Shi, Ye Xing, Zhen-Xing Zhao
doaj   +1 more source

The light scalar mesons as tetraquarks

open access: yesPhysics Letters B, 2016
We present a numerical solution of the four-quark Bethe–Salpeter equation for ground-state scalar tetraquarks with JPC=0++. We find that the four-body equation dynamically generates pseudoscalar-meson poles in the Bethe–Salpeter amplitude.
Gernot Eichmann   +2 more
doaj   +1 more source

Charm meson scattering cross sections by pion and rho meson [PDF]

open access: yes, 2001
Using the local flavor SU(4) gauge invariance in the limit of vanishing vector meson masses, we extend our previous study of charm meson scattering cross sections by pion and rho meson, which is based only on the pseudoscalar-pseudoscalar-vector meson ...
Baier   +20 more
core   +2 more sources

Magnetic polarizabilities of light mesons in SU(3) lattice gauge theory

open access: yesNuclear Physics B, 2015
We investigate the ground state energies of neutral pseudoscalar and vector meson in SU(3) lattice gauge theory in the strong abelian magnetic field.
E.V. Luschevskaya   +3 more
doaj   +1 more source

Trace and Axial Anomalies on Equal Footing

open access: yesAdvances in High Energy Physics, 2020
We discussed that for some particular nonsupersymmetric theories, a generalized symmetry that includes both the scale and axial transformations and leads to a single current may contain also a pseudoscalar term. The method, inspired by the superconformal
Renata Jora
doaj   +1 more source

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