タイトル： LHC phenomenology in light of R(D) and R(D*) anomalies アブストラクト： The combined analysis of the BaBar, Belle, and LHCb data on B to D tau nu, B to D* tau nu, and Bc to J/Psi tau nu decay observables shows violation of the lepton flavor universality which deviates from the standard model prediction at 3-4 sigma levels, called R(D(*)) anomaly. This B anomaly suggests some specific leptoquark models as new physics. Such leptoquark models have been probed by the resonant search at the LHC. On the other hand, it is also possible that the leptoquark is probed by the non-resonant search using large missing transverse momentum cut, where a hard neutrino is recognized as such. In this talk, first, I'll review the current status of the R(D(*)) anomaly. Then, I'll present preliminary results of our ongoing work: we study sensitivity of non-resonant new physics search at the LHC in a high-energy tau lepton with a b-jet and large missing transverse momentum final states. It is shown that the requirement of the additional b jet sufficiently reduces the standard-model background. This process can be dominated by g c to b tau nu contact interaction which are directly correlated with the b to c tau nu anomalies. Therefore one could probe the B-anomaly at the LHC without producing heavy leptoquark.