IIT Jodhpur
Identifying the origin of lepton-universality violation at collider experiments

In recent times, heavy meson physics has gained considerable importance in probing physics beyond the Standard Model (SM) of fundamental interactions of nature. This is because the LHCb collaboration at CERN (European Organization for Nuclear Research), Geneva reported unexpected deviations in measurements of some observables in the decays of B mesons. These include violation of lepton universality, which is deeply embedded in the symmetry structure of the SM.
On April 18, 2017, LHCb collaboration announced its famous result related to the violation of lepton universality. Within few days after this result, seven groups across the globe identified Lorentz structure of new physics independently. Our group was one of them. This work is published in Physical review D (http://inspirehep.net/record/1594904) and has more than 100 citations till now.
Our collaboration was the first to identify Lorentz structures of new physics after the updated measurements announced by the LHCb in March 2019. The nature of this new physics was probed in a model-independent way using the language of effective field theory. We identified parsimonious scenarios that would explain the data with only two vector and axial-vector operators. These results will also guide the construction of models of physics beyond the current paradigm. The LHCb Collaboration acknowledged this work while presenting their results in CERN on 26th March, 2019. We also presented this work in CERN Theory Seminar on 5th July, 2019. Our work got published in Journal of High Energy Physics (http://inspirehep.net/record/1726369) in June, 2019 and has more than 20 citations till now.