Hi! I'm a postdoctoral research associate at SLAC and Stanford. My current research focuses on the role of neutrino oscillations in core-collapse supernovae and binary neutron star merger remnants.

Education & Certifications

  • PhD, Niels Bohr Institute - University of Copenhagen, Astroparticle Physics (2022)
  • MSc, Lund University, Theoretical Physics (2019)

All Publications

  • Neutrino Flavor Pendulum Reloaded: The Case of Fast Pairwise Conversion PHYSICAL REVIEW LETTERS Padilla-Gay, I., Tamborra, I., Raffelt, G. G. 2022; 128 (12): 121102


    In core-collapse supernovae or compact binary merger remnants, neutrino-neutrino refraction can spawn fast pair conversion of the type ν_{e}ν[over ¯]_{e}↔ν_{x}ν[over ¯]_{x} (with x=μ, τ), governed by the angle-dependent density matrices of flavor lepton number. In a homogeneous and axially symmetric two-flavor system, all angle modes evolve coherently, and we show that the nonlinear equations of motion are formally equivalent to those of a gyroscopic pendulum. Within this analogy, our main innovation is to identify the elusive characteristic of the lepton-number angle distribution that determines the depth of conversion with the "pendulum spin." The latter is given by the real part of the eigenfrequency resulting from the linear normal-mode analysis of the neutrino system. This simple analogy allows one to predict the depth of flavor conversion without solving the nonlinear evolution equations. Our approach provides a novel diagnostic tool to explore the physics of nonlinear systems.

    View details for DOI 10.1103/PhysRevLett.128.121102

    View details for Web of Science ID 000786542500003

    View details for PubMedID 35394327

  • Neutrino fast flavor pendulum. II. Collisional damping PHYSICAL REVIEW D Padilla-Gay, I., Tamborra, I., Raffelt, G. 2022
  • A three Higgs doublet model with symmetry-suppressed flavour changing neutral currents JOURNAL OF HIGH ENERGY PHYSICS Das, D., Ferreira, P. M., Morais, A. P., Padilla-Gay, I., Pasechnik, R., Rodrigues, J. 2021
  • Multi-dimensional solution of fast neutrino conversions in binary neutron star merger remnants JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS Padilla-Gay, I., Shalgar, S., Tamborra, I. 2021
  • Neutrino propagation hinders fast pairwise flavor conversions JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS Shalgar, S., Padilla-Gay, I., Tamborra, I. 2020
  • Series solutions of single-field models of inflation Jaramillo-Perez, V. M., Padilla-Gay, I., Diez-Tejedor, A., Urena-Lopez, L. A., Hernandez, H., Chacon, G., Sabido, M. IOP PUBLISHING LTD. 2018