I am broadly interested in neutrino physics. Due to their weak interactions, neutrinos are unique probes of extreme astrophysical environments. Unfortunately, for the same reason, it's difficult to detect them. Neutrino experiments suffer from low event rates and high background rates. I'm interested in improving the detection of neutrinos across a wide range of energies.

You can find me on INSPIRE.


  • Distinguishing flavors of high-energy astrophysical neutrinos

    We are entering a new era of neutrino astronomy with the recent IceCube discovery of high-energy astrophysical neutrinos. The flavor composition of these neutrinos has been identified as a rich observable, containing information about the production processes and neutrino properties. So far, IceCube can only identify charged-current interactions of νμ (track events), but they cannot distinguish between charged-current interactions of νe and ντ (cascade events).

    In our work, we propose two new observables for showers: the muon echo and the neutron echo. They are the collective light from all the muon decays and neutron captures in a shower. They are, on average, brighter in ντ-initiated showers than νe-initiated showers. Utilizing the echoes would break the νeτ degeneracy, allowing powerful tests of the flavor composition.


    Publications

            ●   Echo Technique to Distinguish Flavors of Astrophysical Neutrinos
                  Shirley W. Li, Mauricio Bustamante, John F. Beacom
                  arXiv:1606.06290