$p\bar{p} \to \Lambda_c \bar{\Lambda}_c$ within the generalized parton picture - first results
| Autor: | Goritschnig, A. T., Kroll, P., Schweiger, W. |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | PoS LC2008:021,2008 |
| Druh dokumentu: | Working Paper |
| Popis: | We study proton-antiproton annihilation into $\Lambda_c \bar{\Lambda}_c$ pairs within the generalized parton picture. Our starting point is the double handbag diagram which is shown to factorize into soft generalized parton distributions for the $p \to \Lambda_c$ (and $\bar{p} \to \bar{\Lambda}_c$) transition and a hard subprocess amplitude for $u \bar{u} \to c \bar{c}$. Thereby the mass of the charm quark is taken as the hard scale so that our results are not restricted to large scattering angles and/or incredibly large energies. Modelling the generalized parton distributions for the $p\to \Lambda_c$ transition by an overlap of simple quark-diquark light-cone wave functions we make first predictions for $p\to \Lambda_c$ transition form factors and unpolarized $p\bar{p} \to \Lambda_c \bar{\Lambda}_c$ cross sections. Our findings may become interesting in view of forthcoming experiments at FAIR in Darmstadt. Comment: Talk given at Light Cone 2008: Relativistic Nuclear and Particle Physics, Mulhouse, France, 07-1 July 2008 |
| Databáze: | arXiv |
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