2021-22 Courses


Work Experience


  • Postdoctoral Researcher, MIT Center for Theoretical Physics (2017 - 2020)

    Location

    Cambridge, MA

All Publications


  • Celestial-body focused dark matter annihilation throughout the Galaxy PHYSICAL REVIEW D Leane, R. K., Linden, T., Mukhopadhyay, P., Toro, N. 2021; 103 (7)
  • Exoplanets as Sub-GeV Dark Matter Detectors PHYSICAL REVIEW LETTERS Leane, R. K., Smirnov, J. 2021; 126 (16): 161101

    Abstract

    We present exoplanets as new targets to discover dark matter (DM). Throughout the Milky Way, DM can scatter, become captured, deposit annihilation energy, and increase the heat flow within exoplanets. We estimate upcoming infrared telescope sensitivity to this scenario, finding actionable discovery or exclusion searches. We find that DM with masses above about an MeV can be probed with exoplanets, with DM-proton and DM-electron scattering cross sections down to about 10^{-37}  cm^{2}, stronger than existing limits by up to six orders of magnitude. Supporting evidence of a DM origin can be identified through DM-induced exoplanet heating correlated with galactic position, and hence DM density. This provides new motivation to measure the temperature of the billions of brown dwarfs, rogue planets, and gas giants peppered throughout our Galaxy.

    View details for DOI 10.1103/PhysRevLett.126.161101

    View details for Web of Science ID 000652829600002

    View details for PubMedID 33961477

  • Supernova Muons: New Constraints on Z ' Bosons, Axions and ALPs JOURNAL OF HIGH ENERGY PHYSICS Croon, D., Elor, G., Leane, R. K., McDermott, S. D. 2021
  • Spurious Point Source Signals in the Galactic Center Excess PHYSICAL REVIEW LETTERS Leane, R. K., Slatyer, T. R. 2020; 125 (12): 121105

    Abstract

    We reexamine evidence that the Galactic Center Excess (GCE) originates primarily from point sources (PSs). We show that in our region of interest, non-Poissonian template fitting evidence for GCE PSs is an artifact of unmodeled north-south asymmetry of the GCE. This asymmetry is strongly favored by the fit (although it is unclear if this is physical), and when it is allowed, the preference for PSs becomes insignificant. We reproduce this behavior in simulations, including detailed properties of the spurious PS population. We conclude that the non-Poissonian template fitting evidence for GCE PSs is highly susceptible to certain systematic errors and should not at present be taken to robustly disfavor a dominantly smooth GCE.

    View details for DOI 10.1103/PhysRevLett.125.121105

    View details for Web of Science ID 000569641300004

    View details for PubMedID 33016744

  • The enigmatic Galactic Center excess: Spurious point sources and signal mismodeling PHYSICAL REVIEW D Leane, R. K., Slatyer, T. R. 2020; 102 (6)
  • A systematic study of hidden sector dark matter: application to the gamma-ray and antiproton excesses JOURNAL OF HIGH ENERGY PHYSICS Hooper, D., Leane, R. K., Tsai, Y., Wegsman, S., Witte, S. J. 2020
  • Warming nuclear pasta with dark matter: kinetic and annihilation heating of neutron star crusts JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS Acevedo, J. F., Bramante, J., Leane, R. K., Raj, N. 2020
  • Revival of the Dark Matter Hypothesis for the Galactic Center Gamma-Ray Excess PHYSICAL REVIEW LETTERS Leane, R. K., Slatyer, T. R. 2019; 123 (24): 241101

    Abstract

    Statistical evidence has previously suggested that the galactic center GeV excess (GCE) originates largely from point sources, and not from annihilating dark matter. We examine the impact of unmodeled source populations on identifying the true origin of the GCE using non-Poissonian template fitting (NPTF) methods. In a proof-of-principle example with simulated data, we discover that unmodeled sources in the Fermi bubbles can lead to a dark matter signal being misattributed to point sources by the NPTF. We discover striking behavior consistent with a mismodeling effect in the real Fermi data, finding that large artificial injected dark matter signals are completely misattributed to point sources. Consequently, we conclude that dark matter may provide a dominant contribution to the GCE after all.

    View details for DOI 10.1103/PhysRevLett.123.241101

    View details for Web of Science ID 000502130400001

    View details for PubMedID 31922851

  • Constraints on spin-dependent dark matter scattering with long-lived mediators from TeV observations of the Sun with HAWC PHYSICAL REVIEW D Albert, A., Alfaro, R., Alvarez, C., Arceo, R., Arteaga-Velazquez, J. C., Avila Rojas, D., Solares, H., Belmont-Moreno, E., Benzvi, S. Y., Brisbois, C., Caballero-Mora, K. S., Capistran, T., Carraminana, A., Casanova, S., Castillo, M., Cotzomi, J., Coutino de Leon, S., De Leon, C., De la Fuente, E., Dichiara, S., Dingus, B. L., DuVernois, M. A., Diaz-Velez, J. C., Engel, K., Enriquez-Rivera, O., Espinoza, C., Fleischhack, H., Fraija, N., Garcia-Gonzalez, J. A., Garfias, F., Gonzalez, M. M., Goodman, J. A., Hampel-Arias, Z., Harding, J. P., Hernandez, S., Hona, B., Hueyotl-Zahuantitla, F., Huntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, Kaufmann, S., Leon Vargas, H., Luis-Raya, G., Lundeen, J., Lopez-Coto, R., Malone, K., Marinelli, S. S., Martinez, O., Martinez-Castellanos, Martinez-Castro, J., Miranda-Romagnoli, P., Moreno, E., Mostafa, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Pretz, J., Perez-Perez, E. G., Ren, Z., Rho, C. D., Riviere, C., Rosa-Gonzalez, D., Rosenberg, M., Ruiz-Velasco, E., Salazar, H., Greus, F., Sandoval, A., Schneider, M., Arroyo, M., Sinnis, G., Smith, A. J., Springer, R. W., Surajbali, P., Taboada, Tibolla, O., Tollefson, K., Torres, Villasenor, L., Weisgarber, T., Westerhoff, S., Wisher, I. G., Wood, J., Yapici, T., Zepeda, A., Zhou, H., Alvarez, J. D., Beacom, J. F., Leane, R. K., Linden, T., Ng, K. Y., Peter, A. G., Zhou, B., HAWC Collaboration 2018; 98 (12)
  • First HAWC observations of the Sun constrain steady TeV gamma-ray emission PHYSICAL REVIEW D Albert, A., Alfaro, R., Alvarez, C., Arceo, R., Arteaga-Velazquez, J. C., Avila Rojas, D., Solares, H., Belmont-Moreno, E., BenZvi, S. Y., Brisbois, C., Caballero-Mora, K. S., Capistran, T., Carraminana, A., Casanova, S., Castillo, M., Cotzomi, J., Coutino de Leon, S., De Leon, C., De la Fuente, E., Dichiara, S., Dingus, B. L., DuVernois, M. A., Diaz-Velez, J. C., Engel, K., Enriquez-Rivera, O., Espinoza, C., Fleischhack, H., Fraija, N., Garcia-Gonzalez, J. A., Garfias, F., Gonzalez, M. M., Goodman, J. A., Hampel-Arias, Z., Harding, J. P., Hernandez, S., Hona, B., Hueyotl-Zahuantitla, F., Huntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, Kaufmann, S., Vargas, H., Luis-Raya, G., Lundeen, J., Lopez-Coto, R., Malone, K., Marinelli, S. S., Martinez, O., Martinez-Castellanos, Martinez-Castro, J., Miranda-Romagnoli, P., Moreno, E., Mostafa, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Pretz, J., Perez-Perez, E. G., Ren, Z., Rho, C. D., Riviere, C., Rosa-Gonzalez, D., Rosenberg, M., Ruiz-Velasco, E., Salazar, H., Greus, F., Sandoval, A., Schneider, M., Schoorlemmer, H., Arroyo, M., Sinnis, G., Smith, A. J., Springer, R. W., Surajbali, P., Taboada, Tibolla, O., Tollefson, K., Torres, Villasenor, L., Weisgarber, T., Westerhoff, S., Wisher, I. G., Wood, J., Yapici, T., Zepeda, A., Zhou, H., Alvarez, J. D., Beacom, J. F., Leane, R. K., Linden, T., Ng, K. Y., Peter, A. G., Zhou, B., HAWC Collaboration 2018; 98 (12)
  • GeV-scale thermal WIMPs: Not even slightly ruled out PHYSICAL REVIEW D Leane, R. K., Slatyer, T. R., Beacom, J. F., Ng, K. Y. 2018; 98 (2)
  • Enhancing dark matter annihilation rates with dark bremsstrahlung PHYSICAL REVIEW D Bell, N. F., Cai, Y., Dent, J. B., Leane, R. K., Weiler, T. J. 2017; 96 (2)
  • Powerful solar signatures of long-lived dark mediators PHYSICAL REVIEW D Leane, R. K., Ng, K. Y., Beacom, J. F. 2017; 95 (12)
  • Impact of mass generation for spin-1 mediator simplified models JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS Bell, N. F., Cai, Y., Leane, R. K. 2017
  • Dark forces in the sky: signals from Z ' and the dark Higgs JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS Bell, N. F., Cai, Y., Leane, R. K. 2016
  • Mono-W dark matter signals at the LHC: simplified model analysis JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS Bell, N. F., Cai, Y., Leane, R. K. 2016
  • Dark matter at the LHC: Effective field theories and gauge invariance PHYSICAL REVIEW D Bell, N. F., Cai, Y., Dent, J. B., Leane, R. K., Weiler, T. J. 2015; 92 (5)
  • Leptophilic dark matter with Z ' interactions PHYSICAL REVIEW D Bell, N. F., Cai, Y., Leane, R. K., Medina, A. D. 2014; 90 (3)