Triangle singularity in the B- →k-π0X (3872) reaction and sensitivity to the X (3872) mass

We have done a study of the B-→K-π0X(3872) reaction by means of a triangle mechanism via the chain of reactions: B-→K-D∗0D∗0; D∗0→π0D0; D0D∗0→X(3872). We show that this mechanism generates a triangle singularity in the π0X(3872) invariant mass for a very narrow window of the X(3872) mass, around the...

ver descrição completa

Detalhes bibliográficos
Autores: Sakai, S., Oset, Eulogi, Guo, F.K.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/216220
Acesso em linha:http://hdl.handle.net/10261/216220
Access Level:acceso abierto
Descrição
Resumo:We have done a study of the B-→K-π0X(3872) reaction by means of a triangle mechanism via the chain of reactions: B-→K-D∗0D∗0; D∗0→π0D0; D0D∗0→X(3872). We show that this mechanism generates a triangle singularity in the π0X(3872) invariant mass for a very narrow window of the X(3872) mass, around the present measured values, and show that the peak positions and the shape of the mass distributions are sensitive to the X(3872) mass, such that a measurement of the reaction can serve to improve on the present values of this mass. In particular, we point out that the X(3872) mass relative to the D0D∗0 threshold may be extracted from the asymmetry of the π0X line shape.

Registos relacionados