English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In this work we have employed Bethe-Salpeter equation (BSE) under covariantinstantaneous ansatz (CIA) to study electromagnetic decays of ground stateequal mass vector mesons: $\rho$, $\omega$, $\phi$, $\psi$ and $Y$ through theprocess $V\rightarrow\gamma*\rightarrow e^+ + e^-$. We employ the generalizedstructure of hadron-quark vertex function $\Gamma$ which incorporates variousDirac structures from their complete set order-by-order in powers of inverse ofmeson mass. The electromagnetic decay constants for the above mesons arecalculated using the leading order (LO) and the next-to-leading order (NLO)Dirac structures. The relevance of various Dirac structures in this calculationis studied.

Relevance of various Dirac covariants in hadronic Bethe-Salpeter wave functions in electromagnetic decays of ground state vector mesons