A possible simultaneous fit to the available $e^+e^- \rightarrow \Lambda^+_c \bar{\Lambda}^-_c$ cross section data nearby $\psi(4660)$ by means of a strong correction to the Coulomb enhancement factor
| Autor: | Amoroso, Antonio, Bagnasco, Stefano, Ferroli, Rinaldo Baldini, Balossino, Ilaria, Bertani, Monica, Bettoni, Diego, Bianchi, Fabrizio, Bortone, Alberto, Calcaterra, Alessandro, Cibinetto, Gianluigi, Cossio, Fabio, De Mori, Francesca, Rolo, Manuel Dioniso Da Rocha, Destefanis, Marco, Farinelli, Riccardo, Fava, Luciano, Felici, Giulietto, Gaido, Luciano, Garzia, Isabella, Greco, Michela, Lavezzi, Lia, Lusso, Stefano, Maggiora, Marco, Mangoni, Alessio, Marcello, Simonetta, Mezzadri, Giulio, Pace, Elisabetta, Pacetti, Simone, Patteri, Piero, Rivetti, Angelo, Scodeggio, Marco, Sosio, Stefano, Spataro, Stefano |
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| Rok vydání: | 2020 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | There are two available set of data on the $e^+e^- \rightarrow \Lambda^+_c \bar{\Lambda}_c^-$ cross section above threshold. The BELLE measurement, with ISR return, is compatible with the presence of a resonant state, called $\psi(4660)$ (formerly known as $Y(4660)$), observed also in other final states. The BESIII dataset has shown a different trend, with a flat cross section. We propose a new solution to fit both datasets by means of a strong correction to the Coulomb enhancement factor. Mass and width of the resonant state is extracted. Comment: Found a bug in the present version of the work that lead to drawing incorrect conclusions in the discussion of the results |
| Databáze: | arXiv |
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