A Regge-based model with vector-meson exchanges calculates differential cross sections for gamma p to p f2(1270) and the pi+pi- invariant mass spectrum using a Breit-Wigner resonance shape.
Phenomenology of $f_2(1270)$ photoproduction at energies measured with the CLAS facility
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abstract
We investigate the photoproduction of the tensor meson $f_2(1270)$ on the proton within a Regge-based framework, focusing on the reaction $\gamma p \to p f_2(1270)$ in the few-GeV energy region. The production mechanism is modeled through the exchange of vector-meson Regge trajectories in the $t$-channel, including both $\rho$ and $\omega$ exchanges with phenomenologically motivated couplings. The scattering amplitudes are derived using Reggeized propagators and effective hadronic vertices, allowing for the calculation of differential cross sections in the narrow-width approximation. We further extend the analysis to the $\pi^+\pi^-$ invariant mass distribution by incorporating a relativistic Breit--Wigner description of the $f_2(1270)$ resonance.
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Phenomenology of $f_2(1270)$ photoproduction at energies measured with the CLAS facility
A Regge-based model with vector-meson exchanges calculates differential cross sections for gamma p to p f2(1270) and the pi+pi- invariant mass spectrum using a Breit-Wigner resonance shape.