Results 171 to 180 of about 66,365 (303)

Pseudoscalar transition form factors: (g − 2) of the muon, pseudoscalar decays into lepton pairs, and the η – η′ mixing

open access: yesEPJ Web of Conferences, 2016
We present our model-independent and data-driven method to describe pseudoscalar meson transition form factors in the space- and (low-energy) time-like regions.
Masjuan Pere, Sanchez-Puertas Pablo
doaj   +1 more source

Pseudoscalar Higgs plus jet production at Next-to-Next-to-Leading Order in QCD

open access: yesJournal of High Energy Physics
We present a calculation of pseudoscalar Higgs production in association with a jet at Next-to-Next-to Leading Order (NNLO) accuracy in QCD. We work in an effective field theory in which m t → ∞ resulting in effective operators which couple the ...
Youngjin Kim, Ciaran Williams
doaj   +1 more source

On the precision of a data-driven estimate of the pseudoscalar-pole contribution to hadronic light-by-light scattering in the muon g−2

open access: yesEPJ Web of Conferences, 2016
The evaluation of the numerically dominant pseudoscalar-pole contribution to hadronic light-bylight scattering in the muon g − 2 involves the pseudoscalar-photon transition form factor FPγ*γ*(−Q12−Q22) with P = π0, η, η′ and, in general, two off-shell ...
Nyffeler Andreas
doaj   +1 more source

New Mass and Mass-Mixing Angle Relations for Pseudoscalar Mesons [PDF]

open access: yesarXiv, 1998
We study the origins of the inaccuracies of Schwinger's nonet mass, and the Sakurai mass-mixing angle, formulae for the pseudoscalar meson nonet, and suggest new versions of them, modified by the inclusion of the pseudoscalar decay constants. We use these new formulae to determine the pseudoscalar decay constants and mixing angle. The results obtained,
arxiv  

Pseudoscalar mesons parton distribution amplitudes

open access: yesEPJ Web of Conferences, 2016
We compute all kaon and pion parton distribution amplitudes (PDAs) to twist-three and find that all of the pion’s distributions are symmetric and all of the kaon’s distributions are skewed in favour of the heavier s-quark, which are clear signals of ...
Chen Chen, Shi Chao
doaj   +1 more source

Internal symmetry implications of the Veneziano model in pseudoscalar-pseudoscalar scattering

open access: yesNuclear Physics B, 1969
Abstract The leading order Veneziano model amplitudes for ( J P ) 0 − × 0 − → 0 − × 0 − scattering ∗∗ constrained by the absence of “exotic” resonances, is shown to predict the coupling constant relation of SU(3) coupled with the quark-model/SU(6) ideal singlet-octet mixing in the 1 − , 2 + , nonets.
openaire   +2 more sources

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