2025/02/28 by Kumar, Tarun, Mawlong, Barilang
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.2502.20980
The rare b → s ℓ+ℓ- transition is a well-explored transition, particularly for new physics beyond the standard model. Similar to this transition, another flavor changing neutral current transition b → s νν involving a dineutrino pair also plays an important role in the search for new physics. The B → K νν mode is one such dineutrino channel that has been analyzed in many works both within the standard model and beyond standard model framework. In this paper, we investigate the Bc → Ds νν decay channel which proceeds via the b → s νν transition. We consider an effective Hamiltonian framework involving new physics currents. To explore these currents further, we also analyse the decay mode within the V2 leptoquark model. In our analysis, we use the form factors that have been obtained in lattice QCD calculations. We then make predictions of the Bc → Ds νν branching fraction both within the standard model and beyond.