Associative charm photoproduction with circularly polarized photons

Abstract

We calculate the asymmetries for the processes $\vec{\gamma }+\vec{p}\to {\Lambda }_c^{+}({\Sigma }_c^{+})+\overline{D^0}$ and $\vec{\gamma }+\vec{p}\to {\Lambda }_c^{+}({\Sigma }_c^{+})+\overline{D^{\ast }}$, induced by circularly polarized photons on a polarized proton target in the framework of an effective Lagrangian model. We found large and positive values for the asymmetry induced by the $z-$component of the proton polarization, in a wide energy region, from threshold up to $E_{\gamma }=70$ GeV. In the case of pseudoscalar meson photoproduction, the predictions are qualitatively model-independent. For $D^{\ast }$-photoproduction, there is a strong dependence of the asymmetries on $N{\Lambda }_{c}D(D^{\ast })$-coupling constants.

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References in corpus (4)

• Leading-twist Single-transverse-spin asymmetries: Drell-Yan and Deep-Inelastic Scattering
• Final-State Interactions and Single-Spin Asymmetries in Semi-Inclusive Deep Inelastic Scattering
• Photoproduction of charm near threshold
• Photoproduction of charmed vector mesons, $\gamma +N\to {\mathcal{B}}_c+\overline{D^{\ast }}$, with ${\mathcal{B}}_c={\Lambda }_c$ or ${\Sigma }_c$

Cited by in corpus (3)

• D* and D Meson Production in Muon Nucleon Interactions at 160 GeV/c
• P-parity of charmed particles from associative photoproduction of D and D^*-mesons
• Determination of the $g_{\rho \sigma \gamma }$ coupling constant through the process $\gamma +N\to N+V$ with circularly polarized photons