Results 91 to 100 of about 2,180 (221)
Photon-meson transition form factors of light pseudoscalar mesons [PDF]
, 2005 The photon-meson transition form factors of light pseudoscalar mesons pi(0), eta, and eta' are systematically calculated in a light-cone framework, which is applicable as a light-cone quark model at low Q(2) and is also physically in accordance with
Xiao, BW, Ma, BQ
core +1 more source
Exploring solutions to the muon g-2 anomaly in a 3-3-1 model under flavor constraints
European Physical Journal C: Particles and FieldsThe magnetic moment of the muon can receive significant two-loop contributions from a light pseudoscalar. Notably, the spectrum of scalars of 3-3-1 models includes one pseudoscalar.
A. Doff +2 more
doaj +1 more source
Millimeter‐Wave WISP Search with Coherent Light‐Shining‐Through‐a‐Wall Toward the STAX Project
Annalen der Physik, Volume 536, Issue 1, January 2024.This research article shows potential of millimeter waves for searching dark photons, one of the candidates of dark matter. By sharing a common reference signal, an excellent temporal coherency is achieved between production and detection of dark photons.
Akira Miyazaki +7 more
wiley +1 more source
The annihilation of virtual photons into pseudoscalar mesons [PDF]
The European Physical Journal C, 2001 We investigate the possibility to constrain the pion distribution amplitude from the gamma* gamma* -> pi transition. For a surprisingly large range in the two photon virtualities we find that the transition form factor is essentially independent of the distribution amplitude. This in turn entails a parameter-free prediction of QCD. The gamma* gamma*
Diehl, M., Kroll, P., Vogt, C.
openaire +3 more sources
Equivalence Theorems for Pseudoscalar Coupling [PDF]
, 1952 By a unitary transformation a rigorous equivalence theorem is established for the pseudoscalar coupling of pseudoscalar mesons (neutral and charged) to a second-quantized nucleon field. By the transformation the linear pseudoscalar coupling is eliminated
Osborn, Richard K. +2 more
core +1 more source
Next-to-leading order corrections to deeply virtual production of pseudoscalar mesons
Physics Letters B, 2017 We complete the perturbative next-to-leading order corrections to the hard scattering amplitudes of deeply virtual meson leptoproduction processes at leading twist-two level by presenting the results for the production of flavor singlet pseudoscalar ...
G. Duplančić +2 more
doaj +1 more source
Semileptonic decay of Ds+→π0ℓ+νℓ via neutral meson mixing
Physics Letters B, 2020 Based on the mechanism of neutral meson mixing, we predict the branching fraction of the semileptonic decay of Ds+→π0ℓ+νℓ (ℓ=e, μ) using recently measured branching fraction of Ds+→ηe+νe by BESIII experiment.
Hai-Bo Li, Mao-Zhi Yang
doaj +1 more source
Annalen der Physik, Volume 536, Issue 1, January 2024.A primer on axion physics, emphasizing an intuitive understanding of why the axion solves the strong CP problem. Abstract The canonical axion potential is reviewed, with an emphasis on the field theory underlying radial and angular modes of complex scalar fields.
Felix Yu
wiley +1 more source
Photoproduction of pion pairs off nucleons [PDF]
, 2014 In the absence of a solution for Quantum Chromodynamics (QCD) in the low energy regime, so called effective models are being used to describe the nucleon and its excited states.
Oberle, Markus
core +1 more source
Exact formula of the spectrum of the pseudoscalar octet
Physics Letters B, 2015 Non-perturbative proof is presented of a generalized version of Goldstone theorem, where the Lagrangian conserves an approximate SU(3) chiral symmetry, that both quark masses and electromagnetism make contributions to the masses of spinless particles of ...
R. Ling, B.L. Li, J.L. Ping
doaj +1 more source