Searches for Light Exotics at LHCb

Abstract

We report on the latest direct searches for light exotics at LHCb, conducted during Run I of LHC. This proceedings are divided into two sections, the first part will cover the search for the lepton number violating decay ${B}\rightarrow {π^{+}μ^{-}μ^{-}}$ while the second part will cover the search for a low mass dark boson in the decay $B^0 \rightarrow K^{*0}χ$, with $χ\rightarrow μ^+μ^-$ and $K^{*0} \rightarrow K^+π^-$. The data used in these searches correspond to integrated luminosities of 1.0 and $2.0$ fb$^{-1}$ collected in $pp$ collisions at centre of mass energies of $\sqrt{s}=7$ and 8 TeV in $pp$ collisions with the LHCb detector.