The Mono-Tau Menace : From B Decays to High-p T Tails
Admir Greljo, Jorge Martin Camalich, 2, 3 and José David Ruiz-Álvarez Theoretical Physics Department, CERN, 1 Esplanade des Particules, 1211 Geneva 23, Switzerland Instituto de Astrof́ısica de Canarias, C/ Vı́a Láctea, s/n E38205 La Laguna, Tenerife, Spain Universidad de La Laguna, Departamento de Astrof́ısica, La Laguna, Tenerife, Spain Instituto de F́ısica, Universidad de Antioquia, A.A. 1226, Medelĺın, Colombia We investigate the crossing-symmetry relation between b→ cτ−ν̄ decay and bc̄→ τ−ν̄ scattering to derive direct correlations of New Physics in semi-tauonic B-meson decays and the mono-tau signature at the LHC (pp→ τhX + MET). Using an exhaustive set of effective operators and heavy mediators we find that the current ATLAS and CMS data constrain scenarios addressing anomalies in B-decays. Pure tensor solutions, completed by leptoquark, and right-handed solutions, completed by W ′ R or leptoquark, are challenged by our analysis. Furthermore, the sensitivity that will be achieved in the high-luminosity phase of the LHC will probe all the possible scenarios that explain the anomalies. Finally, we note that the LHC is also competitive in the b → u transitions and bounds in some cases are currently better than those from B decays.