Shashank Bhatnagar

collaborators

3 papers

hep-ph2025

$γ, J / ψ$ production through ISR process in electron-positron annihilation at B-factories

Shashank Bhatnagar

We study the Initial state radiation (ISR) process, $e^{-} e^{+} \to^{*} γ \to γ + J / ψ$ observed at high luminosity $e^{-} e^{+}$ colliders such as B-factories, with the ISR phot…

hep-ph2024

$(J / ψ, J / ψ)$ , and $(η_{c}, η_{c})$ production through two intermediate photons in electron-positron annihilation at B-factories

Shashank Bhatnagar, Hluf Negash

We study the processes, $e^{-} e^{+} \to γ^{*} γ^{*} \to J / ψ + J / ψ$ , and $e^{-} e^{+} \to γ^{*} γ^{*} \to η_{c} + η_{c}$ at $s = 10.6$ GeV in the framework of $4\time…

hep-ph2024

Radiative $E 1$ transitions between $^{3} P_{1}$ and $^{3} S_{1}$ quarkonium states

Vaishali Guleria, Eshete Gebrehana, Shashank Bhatnagar

In this work we study the E1 decay processes, $^{3} P_{1}$ $\to$ $^{3} S_{1} γ$ , and $^{3} S_{1}$ $\to$ $^{3} P_{1} γ$ in the framework of Bethe-Salpeter equation and calculate their dec…

γ,J/ψ production through ISR process in electron-positron annihilation at B-factories

(J/ψ,J/ψ), and (ηc​,ηc​) production through two intermediate photons in electron-positron annihilation at B-factories

Radiative E1 transitions between 3P1​ and 3S1​ quarkonium states

$γ, J / ψ$ production through ISR process in electron-positron annihilation at B-factories

$(J / ψ, J / ψ)$ , and $(η_{c}, η_{c})$ production through two intermediate photons in electron-positron annihilation at B-factories

Radiative $E 1$ transitions between $^{3} P_{1}$ and $^{3} S_{1}$ quarkonium states