Speaker
Description
In this talk we present the outcome of a stand-alone feasibility study using RapidSim simulation software that demonstrates that the Large Hadron Collider beauty (LHCb) experiment will be capable of observing the decays $B^+\rightarrow\tau^+\nu_{\tau}$ and $B_c^+\rightarrow\tau^+\nu_{\tau}$ using the data that is being collecting during Run 3 of the LHC. Our proposed analysis exploits the small distance of only 5.1 millimetres between the sensing elements of LHCb’s innermost silicon pixel detector, the VELO, and the LHC’s proton beams to identify direct pixel hits in the VELO that can be associated with the charged $B^+$, $B_c^+$ or $\tau^+$ particles. By exploiting this extra information, the limitations due to the missing momentum and vertex information, which were up to now considered a showstopper, will be significantly reduced. This provides enough statistical power to pursue the measurements of these two decay channels at the Large Hadron Collider. In particular for the decay $B_c^+\rightarrow\tau^+\nu_{\tau}$, which has been identified by the high energy physics community as a key objective for experiments at the planned next-generation particle accelerators, this means we do not need to wait for the 2030s or beyond to get first experimental constraints.