Электронный каталог

Статья

Cortina Gil, E.
Search for K*+ Decays into the *p*+e*+e*-e*+e*- Final State / E.Cortina Gil, A.Baeva, D.Baigarashev, D.Emelyanov, T.Enik, V.Falaleev, D.Kereibay, V.Kekelidze, A.Korotkova, D.Madigozhin, M.Misheva, N.Molokanova, S.Movchan, I.Polenkevich, Yu.Potrebenikov, S.Shkarovskiy, A.Zinchenko, [NA62 Collab.] // Physics Letters B [Electronic resource]. – 2023. – Vol.846. – P.138193. – URL: https://doi.org/10.1016/j.physletb.2023.138193. – Bibliogr.:19.

The first search for ultra-rare decays into the final state is reported, using a dataset collected by the NA62 experiment at CERN in 2017–2018. An upper limit of at 90% CL is obtained for the branching ratio of the decay, predicted in the Standard Model to be . Upper limits at 90% CL are obtained at the level of for the branching ratios of two prompt decay chains involving pair-production of hidden-sector mediators,



ОИЯИ = ОИЯИ (JINR)2023
Спец.(статьи,препринты) = С 346.5б - Свойства К-мезонов: масса, спин, четность, схемы и времена распадов