Электронный каталог

Статья

Adhikary, H.
Observation of the K*+ *> *p*+*n*n^- Decay and Measurement of Its Branching Ratio / H.Adhikary, A.Baeva, D.Baigarashev, V.Bautin, D.Emelyanov, T.Enik, V.Falaleev, V.Kekelidze, D.Kereibay, A.Korotkova, L.Litov, D.Madigozhin, M.Misheva, N.Molokanova, I.Polenkevich, Yu.Potrebenikov, K.Salamatin, S.Shkarovskiy, [NA62 Collab.]. – Text : electronic // Journal of High Energy Physics. – 2025. – Vol. 2025, No. 2. – P. 191. – URL: https://doi.org/10.1007/JHEP02(2025)191. – Bibliogr.: 31.

A measurement of the K*+ → π*+νν¯ decay by the NA62 experiment at the CERN SPS is presented, using data collected in 2021 and 2022. This dataset was recorded, after modifcations to the beamline and detectors, at a higher instantaneous beam intensity with respect to the 2016–2018 data taking. Combining NA62 data collected in 2016–2022, a measurement of B(K*+ → π*+νν¯)=(13.0&sup(+3.3)&sub(−3.0)× 10&sup(−11) is reported. With 51 signal candidates observed and an expected background of 18&sup(+3)&sub(−2) events, B(K+ → π*+νν:¯) becomes the smallest branching ratio measured with a signal signifcance above 5 σ.



ОИЯИ = ОИЯИ (JINR)2025
Спец.(статьи,препринты) = С 346.5б - Свойства К-мезонов: масса, спин, четность, схемы и времена распадов