학술논문
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
Document Type
Working Paper
Author
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
Source
Subject
Language
Abstract
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
Comment: Found a bug in the present version of the work that lead to drawing incorrect conclusions in the discussion of the results