Journal ArticleDOI
Two-photon decay of the pseudoscalar mesons
TLDR
In this article, the two-photon decays of the pseudoscalar mesons are studied in terms of the fundamental quark-antiquark annihilation amplitude, and the similarity of the mesons to parapositronium is stressed.Abstract:
The two-photon decays of the pseudoscalar mesons are studied in terms of the fundamental quark-antiquark annihilation amplitude. The similarity of the pseudoscalars to parapositronium is stressed. In particular, it is shown that the atomic physics result for the decay width of parapositronium, modified in certain cases to accommodate strong-binding effects, is applicable to these hadrons and leads to values for their two-photon widths which are in accord with experimental results. (AIP)read more
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Journal ArticleDOI
Dynamic properties of charmonium
Olga Lakhina,Eric S. Swanson +1 more
TL;DR: In this paper, non-relativistic quark models of charmonia are tested by comparison of theoretical charmonium decay constants, form factors, and widths with experiment and lattice gauge computations.
Journal ArticleDOI
The Constituent Quark Exchange Model for the Bound State Nucleons
TL;DR: In this paper, the effect of sea quarks and gluons are included in the quark exchange model (QEM) to calculate the parton distributions of bound protons, and the ratio of the structure functions of neutron to proton is also calculated with the assumption of isospin symmetry.
Journal ArticleDOI
The Structure Functions of 3 He and 3 H Nuclei in the Constituent Quark Exchange Model
TL;DR: In this paper, the effect and role of sea quarks and gluons, and their contributions to the parton distributions and the structure functions of 3====== He and 3====== H mirror nuclei are analyzed.
Journal ArticleDOI
Form factors and branching ratio for the B→lνγ decay
TL;DR: In this article, form factors parameterizing radiative leptonic decays of heavy mesons (B+→γl+νl) against photon energy are computed in the language of dispersion relations.
Journal ArticleDOI
FORM FACTORS FOR B→πlν DECAY IN A MODEL CONSTRAINED BY CHIRAL SYMMETRY AND QUARK MODEL
TL;DR: In this paper, the form factors for the B→π transition are evaluated in the entire momentum transfer range by using the constraints obtained in the framework combining the heavy quark expansion and chiral symmetry for light quarks and the quark model.