Электронный каталог

Статья

Aaij, R.
Search for B&sup(*0)&sub((s)) *> *nm*+*m*- in B*+&sub(c) *> *p*+*m*+*m*- Decays / R.Aaij, K.Ivshin, A.Solovev, [a.o.]. – Text : electronic // The European Physical Journal C. – 2025. – Vol. 85, No. 1. – P. 20. – URL: https://doi.org/10.1140/epjc/s10052-024-13573-0. – Bibliogr.: 66.

A search for the very rare B∗0 → μ*+μ*− and B∗0&sub(s) → μ*+*μ− decays is conducted by analysing the B*+&sub(c) → π*+μ*+μ*− process. The analysis uses proton-proton collision data collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 fb&sup(−1_. The signal signatures correspond to simultaneous peaks in the μ*+μ*− and π*+μ*+μ*− invariant masses. No evidence for an excess of events over background is observed for either signal decay mode. Upper limits at the 90% confidence level are set on the branching fractions relative to that for B*+&sub(c) → J/ψπ*+ decays, R&sub(B∗0)(μ*+μ*−)π*+/J/ψπ*+ < 3.8 × 10&sup(−5) and R&sub(B∗0)&sub(s)(μ*+μ*−)π*+/J/ψπ*+ < 5.0 × 10&sup(−5)



ОИЯИ = ОИЯИ (JINR)2025
Спец.(статьи,препринты) = С 346.2в - Взаимодействие протонов с протонами
Спец.(статьи,препринты) = С 346.6 - Резонансы и новые частицы