可能同时适合可用的$ e^+e^ - \rightarrowλ^+_ c \barλ^ - _ c $ cob $ cross tagation $ψ（4660）$ $ coulomb增强因子$ψ（4660）$

论文标题

可能同时适合可用的$ e^+e^ - \rightarrowλ^+_ c \barλ^ - _ c $ cob $ cross tagation $ψ（4660）$ $ coulomb增强因子$ψ（4660）$

A possible simultaneous fit to the available $e^+e^- \rightarrow Λ^+_c \barΛ^-_c$ cross section data nearby $ψ(4660)$ by means of a strong correction to the Coulomb enhancement factor

论文作者

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

论文摘要

$ e^+e^ - \rightArrowλ^+_ c \barλ_c^ - $ cross部分上方有两组可用的数据集。在ISR回报的情况下，Belle的测量与在其他最终状态中也观察到的共鸣状态（以前称为$ y（4660）$）的共鸣状态兼容。 BESIII数据集显示出不同的趋势，具有平坦的横截面。我们提出了一种新的解决方案，通过对库仑增强因子的强有校正来拟合两个数据集。提取共振状态的质量和宽度。

There are two available set of data on the $e^+e^- \rightarrow Λ^+_c \barΛ_c^-$ cross section above threshold. The BELLE measurement, with ISR return, is compatible with the presence of a resonant state, called $ψ(4660)$ (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.

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