A Fit to the Available <i>e</i><sup>+</sup><i>e</i><sup>−</sup> → <inline-formula><math display="inline"><semantics><mrow><msubsup><mi mathvariant="sans-serif">Λ</mi><mi>c</mi><mo>+</mo></msubsup><msubsup><mover accent="true"><mi mathvariant="sans-serif">Λ</mi><mo>¯</mo></mover><mi>c</mi><mo>−</mo></msubsup></mrow></semantics></math></inline-formula> Cross Section Data Nearby Production Threshold by Means of a Strong Correction to the Coulomb Enhancement Factor

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A Fit to the Available <i>e</i><sup>+</sup><i>e</i><sup>−</sup> → <inline-formula><math display="inline"><semantics><mrow><msubsup><mi mathvariant="sans-serif">Λ</mi><mi>c</mi><mo>+</mo></msubsup><msubsup><mover accent="true"><mi mathvariant="sans-serif">Λ</mi><mo>¯</mo></mover><mi>c</mi><mo>−</mo></msubsup></mrow></semantics></math></inline-formula> Cross Section Data Nearby Production Threshold by Means of a Strong Correction to the Coulomb Enhancement Factor

There are two available sets of data on the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msup><mi>e</mi><mo>+</mo></msup><msup><mi>e</mi><mo>...

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Detalles Bibliográficos
Autores principales:	Antonio Amoroso, Stefano Bagnasco, Rinaldo Baldini Ferroli, Ilaria Balossino, Monica Bertani, Diego Bettoni, Fabrizio Bianchi, Alberto Bortone, Alessandro Calcaterra, Gianluigi Cibinetto, Fabio Cossio, Francesca De Mori, Manuel Dioniso Da Rocha Rolo, Marco Destefanis, Riccardo Farinelli, Luciano Fava, Giulietto Felici, Luciano Gaido, Isabella Garzia, Stefano Gramigna, Michela Greco, Lia Lavezzi, Stefano Lusso, Marco Maggiora, Alessio Mangoni, Simonetta Marcello, Giulio Mezzadri, Sara Morgante, Elisabetta Pace, Simone Pacetti, Piero Patteri, Angelo Rivetti, Marco Scodeggio, Stefano Sosio, Stefano Spataro
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	hadron spectroscopy exotic states particle physics charmed hyperon cross section Elementary particle physics QC793-793.5
Acceso en línea:	https://doaj.org/article/1daa3b1509294b76934df7e023a658d7
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

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Sumario:	There are two available sets of data on the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msup><mi>e</mi><mo>+</mo></msup><msup><mi>e</mi><mo>−</mo></msup><mo>→</mo><msubsup><mi mathvariant="sans-serif">Λ</mi><mi>c</mi><mo>+</mo></msubsup><msubsup><mover accent="true"><mi mathvariant="sans-serif">Λ</mi><mo>¯</mo></mover><mi>c</mi><mo>−</mo></msubsup></mrow></semantics></math></inline-formula> cross section at energies close to the production threshold, collected by the Belle and by the BESIII Collaborations. The measurement of the former, performed by means of the initial state radiation technique, is compatible with the presence of a resonance, called <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>ψ</mi><mo>(</mo><mn>4660</mn><mo>)</mo></mrow></semantics></math></inline-formula>, observed also in other final states. On the contrary, the latter is measured an almost flat and hence non-resonant cross section in the energy region just above the production threshold, but the data stop before the possible rise in the cross section for the resonant production. We propose an effective model to describe the behavior of the data near this threshold, which is based on a Coulomb-like enhancement factor due to the strong interaction among the final state particles. In the framework of this model, it is possible to describe both datasets.