Results 61 to 70 of about 57,829 (262)
Effects of light-by-light scattering in the Lamb shift and hyperfine structure of muonic hydrogen [PDF]
EPJ Web of Conferences, 2019 We calculate the meson exchange contribution to the interaction operator of muon and proton, which is determined by the meson coupling with two photon state.
Dorokhov A. E. +3 more
doaj +1 more source
QUARK STRUCTURE OF PSEUDOSCALAR MESONS [PDF]
International Journal of Modern Physics A, 2000 I review to which extent the properties of pseudoscalar mesons can be understood in terms of the underlying quark (and eventually gluon) structure. Special emphasis is put on the progress in our understanding of η–η′ mixing. Process-independent mixing parameters are defined, and relations between different bases and conventions are studied.
openaire +2 more sources
Amplitude ambiguities in pseudoscalar meson photoproduction [PDF]
Physical Review C, 1996 7 ...
Greg Keaton, Ron L. Workman
openaire +4 more sources
A tmQCD mixed-action approach to flavour physics
EPJ Web of Conferences, 2018 We discuss a mixed-action approach in which sea quarks are regularised using non-perturbatively O(a) improved Wilson fermions, while a fully-twisted tmQCD action is used for valence quarks.
Herdoíza Gregorio +4 more
doaj +1 more source
European Physical Journal C: Particles and Fields, 2019 We study the scattering of the light-flavor pseudoscalar mesons ($$\pi , K, \eta $$ π,K,η ) off the ground-state charmed mesons ($$D,D_s$$ D,Ds ) within chiral effective field theory.
Zhi-Hui Guo +4 more
doaj +1 more source
Multipole analysis of spin observables in vector meson photoproduction [PDF]
, 1995 A multipole analysis of vector meson photoproduction is formulated as a generalization of the pseudoscalar meson case. Expansion of spin observables in the multipole basis and behavior of these observables near threshold and resonances are examined ...
A. I. Titov +11 more
core +2 more sources
On the masses of light pseudoscalar mesons [PDF]
arXiv, 2023 We investigate the masses of light pseudoscalar mesons by the method based on a new anomaly free condition for axial vector current. By this viewpoint, the field theories discussed here do not have the $U(1)$ problem. We calculate the masses of nine light pseudoscalar mesons, with theoretical result agrees reasonably good with experiment.
arxiv
Flavour-singlet pseudoscalar and scalar mesons [PDF]
Nucl.Phys.Proc.Suppl.83:185-187,2000, 1999 We measure correlations appropriate for favour-singlet mesons using dynamical quark configurations from UKQCD. Improved methods of evaluating the disconnected quark diagrams are presented. The scalar and pseudoscalar meson channels are explored, with special reference to the mixing of scalar mesons with scalar glueballs.
arxiv +1 more source
Leptonic and semileptonic decays of pseudoscalar mesons [PDF]
Physics Letters B, 1999 12 pages LaTeX (elsart.sty) + 4 figures; added references, to appear in Phys.
M. A. IVANOV, SANTORELLI, PIETRO
openaire +5 more sources
EPJ Web of Conferences, 2018 The firm understanding of standard quark-antiquark states (including excited states) is necessary to search for non-conventional mesons with the same quantum numbers.
Piotrowska M., Giacosa F.
doaj +1 more source