t- ?? (')p-?t? decays as background in the search for second class currents
Por:
Guevara, A., López-Castro, G., Roig, P.
Publicada:
1 ene 2017
Categoría:
Physics and astronomy (miscellaneous)
Resumen:
Observation of t-??(')p-?t decays at Belle-II would indicate either a manifestation of isospin symmetry breaking or genuine second class current (SCC) effects. The corresponding radiative t-??(')p-?t? decay channels are not suppressed by G-parity considerations and may represent a serious background in searches of SCCs in the former. We compute the observables associated to these radiative decays using resonance chiral Lagrangians and conclude that vetoing photons with E?>100 MeV should get rid of this background in the Belle-II environment while searching for the t-??p-?t channel. Similar considerations hold inconclusive for decays involving the ?', given the theory's uncertainties in the prediction of the t-??'p-?t branching ratio. Still, additional kinematics-based cuts should be able to suppress this background in the ?' case to a negligible level. © 2017 American Physical Society.
Filiaciones:
Guevara, A.:
Departamento de Física, Centro de Investigación y de Estudios Avanzados, Instituto Politécnico Nacional, Apartado Postal 14-740, Mexico City, Mexico
López-Castro, G.:
Departamento de Física, Centro de Investigación y de Estudios Avanzados, Instituto Politécnico Nacional, Apartado Postal 14-740, Mexico City, Mexico
Roig, P.:
Departamento de Física, Centro de Investigación y de Estudios Avanzados, Instituto Politécnico Nacional, Apartado Postal 14-740, Mexico City, Mexico
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