Study of the nonleptonic decay Ξc0 → Λc+ π- in the covariant confined quark model
Ivanov M.A. Lyubovitskij V.E. Tyulemissov Z.
1 October 2023American Physical Society
Physical Review D
2023#108Issue 7
The nonleptonic decay Ξc0→Λc+π- with ΔC=0 is systematically studied in the framework of the covariant confined quark model accounting for both short and long distance effects. The short distance effects are induced by four topologies of external and internal weak W± exchange, while long distance effects are saturated by an inclusion of the so-called pole diagrams with an intermediate 12+ and 12- baryon resonances. The contributions from 12+ resonances are calculated straightforwardly by accounting for single charmed ςc0 and Ξc′+ baryons whereas the contributions from 12- resonances are calculated by using the well-known soft-pion theorem in the current-algebra approach. It allows to express the parity-violating S-wave amplitude in terms of parity-conserving matrix elements. It is found that the contribution of external and internal W-exchange diagrams is significantly suppressed by more than one order of magnitude in comparison with data. The pole diagrams play the major role to get consistency with experiment.
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Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, 141980, Russian Federation
Institut für Theoretische Physik, Universität Tübingen, Kepler Center for Astro and Particle Physics, Auf der Morgenstelle 14, Tübingen, D-72076, Germany
Departamento de Física, Centro Científico Tecnológico de Valparaíso-CCTVal, Universidad Técnica Federico Santa María, Casilla 110-V, Valparaíso, Chile
Millennium Institute for Subatomic Physics, The High-Energy Frontier (SAPHIR) of Anid, Fernández Concha 700, Santiago, Chile
The Institute of Nuclear Physics, Ministry of Energy of the Republic of Kazakhstan, Almaty, 050032, Kazakhstan
Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
Bogoliubov Laboratory of Theoretical Physics
Institut für Theoretische Physik
Departamento de Física
Millennium Institute for Subatomic Physics
The Institute of Nuclear Physics
Al-Farabi Kazakh National University
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