Event



Experimental Particle Physics: Search for leptonic CP Violation: Insights from the contemporary experiments

Zoya Vallari (Caltech)
- | David Rittenhouse Laboratory, 3W2
An image of Zoya Vallari

Once an unlikely hypothesis not foreseen by the Standard Model, the existence of non-zero neutrino mass is now a well-accepted, experimentally verified fact. The extraordinary smallness of the neutrino mass and the weakness of neutrino interactions determine the scale of observable phenomena, making neutrino experiments acutely challenging. Long-baseline experiments measure neutrino oscillations in accelerator-produced muon neutrino and antineutrino beams to explore open questions about neutrino masses and mixing.  Asymmetry in the rate of $\nu_e$ appearance in the $\nu_\mu$ beam with the rate of $\bar\nu_e$ appearance in the $\bar\nu_\mu$ beam offers a unique measure of potential charge-parity symmetry violation within the lepton sector.

The NOvA and T2K experiments are currently operational long-baseline experiments in the US and Japan, while the Deep Underground Neutrino Experiment (DUNE) is the next-generation experiment based in the US. In this talk, I will present the latest results from the NOvA and the T2K experiments, providing a snapshot of the accelerator-based neutrino oscillation measurements. I will discuss the details of the new combined analysis of the datasets from the NOvA and the T2K experiments. This joint analysis utilizes the advantageous complementarity of the two experiments, which helps break degeneracies in the individual measurements and provides world-leading constraints on neutrino mass-splitting. Moreover, I will outline anticipated milestones over the next few years leading to the commencement of the next generation of long-baseline experiments towards the end of the decade.