Mikhail A. Ivanov

collaborators

2 papers

hep-ph2026

Triangle Feynman diagram in the timelike region

Mikhail A. Ivanov, Dmitri Melikhov, Silvano Simula

In Quantum Field Theory, triangle Feynman diagram $F (p_{1}^{2}, p_{2}^{2}, p_{3}^{2} ∣ m_{1}, m_{2}, m_{3})$ is an analytic function of its variables, whose analytic structure is fully determined by the l…

hep-ph2024

Constraining $λ_{B_{s}}$ by $B_{s} \to γ^{*}$ and $B_{s} \to ϕ$ form factors

Mikhail A. Ivanov, Dmitri Melikhov, Silvano Simula

We calculate the form factors $F_{V} (q^{2}, q^{'2})$ and $F_{T V} (q^{2}, q^{'2})$ describing the $B_{s} \to γ^{*}$ transition induced by the vector and tensor weak currents in a broad range of val…

Triangle Feynman diagram in the timelike region

Constraining λBs​​ by Bs​→γ∗ and Bs​→ϕ form factors

Constraining $λ_{B_{s}}$ by $B_{s} \to γ^{*}$ and $B_{s} \to ϕ$ form factors