3rd ComHEP: Colombian Meeting on High Energy Physics (Cali, Colombia)

Looking for lepton-number-violating processes in |ΔL|=2 decays of Bs meson and Λb baryon

7 Dec 2018, 11:30

20m

Auditorio Pedro Elias (Bloque 4, Piso 3)

Parallel talk

Speaker

Nestor Quintero (Universidad Santiago de Cali)

Description

Lepton-number violation can be induced by the exchange of an on-shell Majorana neutrino N in rare semileptonic $|\mathrm{\Delta }L|=2$ decays of the $B_s$ meson and ${\mathrm{\Lambda }}_b$ baryon. We investigate the production of such a heavy sterile neutrino through these four-body ${\mu }^{+}{\mu }^{+}$ channels and explore the sensitivity that can be reached at the LHCb and CMS experiments. For heavy neutrino lifetimes of ${\tau }_N$ = [1, 100, 1000] ps and integrated luminosities collected of 10 and 50 fb${}^{-1}$ at the LHCb and 30, 300, and 3000 fb${}^{-1}$ at the CMS, we find a significant sensitivity on branching fractions of the orders $\sim {10}^{-9}-{10}^{-8}$. In the kinematically allowed mass ranges of mN, we exclude regions on the parameter space ($m_N,|V_{\mu N}{|}^2$) associated with the heavy neutrino.

Presentation materials

Nestor Quintero_3rd COMHEP 2018.pdf