Walter Tangarife's page



Contact:
E-mail: wtangarife at luc.edu

Department of Physics
Loyola University Chicago
6317 N Broadway
Chicago, IL 60660

Scholar
@waltertangarife

Co-organizer of Latin-American Webinars on Physics
Watch here.

WT

Photo: Lukas Keapproth



Cudahy Science Hall Dark matter Neutrinos Particle Physics
Sterile Neutrinos Hidden Sector AdS/CFT Sterile Neutrino Neutrino Force



I am an Associate Professor in the Department of Physics at Loyola University Chicago, where I arrived in 2018. Previously, I was a Visiting Assistant Professor at Colgate University, and, before that, a postdoc in the Department of Particle Physics at Tel Aviv University. I obtained my Ph.D. at The University of Texas at Austin under the supervision of Willy Fischler and I was a member of the Theory Group.

I am originally from Medellin, Colombia, where I got a B.Sc. in Physics at La Universidad de Antioquia and I was a member of the Particle Phenomenology Group (GFIF) under the supervision of Diego Restrepo.

I was selected as a KITP Scholar for the years 2020-2022.

My research is currently supported by the National Science Foundation under grant No. PHY-2310224, and was supported by PHY-2013052 during 2020-2023. Any opinions, findings, and conclusions or recommendations expressed in my research material are those of the author(s) and do not necessarily reflect the views of the NSF.

I am also very fortunate to be a co-PI in the NSF ADVANCE Adaptation project INSPIRED- Inclusive Practices in the Retention and Equity of Diverse Faculty under grant HRD-2121654. This grant aims to promote the full participation and advancement of women, underrepresented minorities, and women of color faculty at LUC. Learn more here.






Research



Neutrino forces in vacuum (left) and in a neutrino background (right) ( J. High Energ. Phys. 02, 092 (2023)).

Self-interaction among active neutrinos enhance the production of sterile-neutrino dark matter in the early universe (Phys. Rev. Lett. 124, 081802 (2020)).



The static patch of de Sitter, represented as a hyperboloid embedded in Minkowski space (JHEP 1408 (2014) 028).

Dark matter Neutrinos Particle Physics
Sterile Neutrinos Hidden Sector AdS/CFT Supersymmetry Cosmology Dark sectors Particle phenomenology De Sitter Gravity Astrophysics






I am interested in a variety of topics in Particle Theory, including

  • Dark Matter
  • Neutrino Physics
  • Particle Cosmology
  • Supersymmetry
  • Black Holes and the Information Paradox
  • Holographic Entanglement Entropy
  • Applications of the Gauge/Gravity Correspondence.
  • Publications

    1. The neutrino force in neutrino backgrounds: Spin dependence and parity-violating effects.
      Mitrajyoti Ghosh, Yuval Grossman, Walter Tangarife, Xun-Jie Xu, Bingrong Yu.
      J. High Energ. Phys. 07, 107 (2024), arXiv:2405.16801.

    2. Fermion pair radiation from accelerating classical systems.
      Margarita Gavrilova, Mitrajyoti Ghosh, Yuval Grossman, Walter Tangarife, Tien-Hsueh Tsai.
      J. High Energ. Phys. 10, 002 (2023), arXiv:2301.01303.

    3. Neutrino forces in neutrino backgrounds.
      Mitrajyoti Ghosh, Yuval Grossman, Walter Tangarife, Xun-Jie Xu, Bingrong Yu.
      J. High Energ. Phys. 02, 092 (2023), arXiv:2209.07082.

    4. Core-collapse Supernova Constraint on the Origin of Sterile Neutrino Dark Matter via Neutrino Self-interactions.
      Yu-Ming Chen, Manibrata Sen, Walter Tangarife, Douglas Tuckler, and Yue Zhang.
      JCAP 11 (2022) 014 , arXiv:2207.14300.

    5. Dirac dark matter, neutrino masses, and dark baryogenesis.
      Diego Restrepo, Andrés Rivera, and Walter Tangarife.
      Phys. Rev. D 106, 055021 (2022), arXiv:2205.05762.

    6. Contribution to Neutrino Self-Interactions: A White Paper.
      Editors: N. Blinov, M. Bustamante, K. Kelly, Y. Zhang. Contribution to Snowmass 2021
      Phys.Dark Univ. 42 (2023) 101267, arXiv:2203.01955.

    7. Origin of Sterile Neutrino Dark Matter via Vector Secret Neutrino Interactions.
      Kevin J. Kelly, Manibrata Sen, Walter Tangarife, and Yue Zhang.
      Phys. Rev. D 101 11, 115031 (2020), arXiv:2005.03681.

    8. Probing the two-neutrino exchange force using atomic parity violation.
      Mitrajyoti Ghosh, Yuval Grossman, and Walter Tangarife.
      Phys. Rev. D 101, 116006 (2020), arXiv:1912.094441.

    9. Dodelson-Widrow Mechanism in the Presence of Self-Interacting Neutrinos.
      André de Gouvêa, Manibrata Sen, Walter Tangarife, and Yue Zhang.
      Phys. Rev. Lett. 124, 081802 (2020), arXiv:1910.04901

    10. Singlet-Doublet Dirac Dark Matter and Neutrino Masses.
      Diego Restrepo, Andres Rivera, and Walter Tangarife.
      Phys. Rev. D 100, 035029 (2019) arXiv:1906.09685.

    11. Accretion of Dissipative Dark Matter onto Active Galactic Nuclei.
      Nadav Joseph Outmazgine, Oren Slone, Walter Tangarife, Lorenzo Ubaldi, and Tomer Volansky.
      JHEP 1811 (2018) 007, arXiv:1807.04750.

    12. Dynamics of Relaxed Inflation.
      Walter Tangarife, Kohsaku Tobioka, Lorenzo Ubaldi, and Tomer Volansky.
      JHEP 1802 (2018) 084, arXiv:1706.03072.

    13. Relaxed Inflation.
      Walter Tangarife, Kohsaku Tobioka, Lorenzo Ubaldi, and Tomer Volansky.
      arXiv:1706.00438.

    14. Extending the scope of holographic mutual information and chaotic behavior.
      Nilanjan Sircar, Jacob Sonnenschein, and Walter Tangarife.
      JHEP 1605 (2016) 091, arXiv:1602.07307.

    15. Radiative neutrino masses in the singlet-doublet fermion dark matter model with scalar singlets.
      Diego Restrepo, Andres Rivera, Marta Sanchez-Pelaez, Oscar Zapata and Walter Tangarife.
      Phys. Rev. D 92, 013005 (2015) arXiv:1504.07892.

    16. Holographic Schwinger effect in de Sitter space.
      Willy Fischler, Phuc H. Nguyen, Juan F. Pedraza and Walter Tangarife.
      Phys. Rev. D91, 086015 (2015), arXiv:1411.1787.

    17. Supersymmetric Partially Interacting Dark Matter.
      Willy Fischler, Dustin Lorshboug and Walter Tangarife.
      Phys. Rev. D 91, 025010 (2015), arXiv:1405.7708.

    18. Fluctuation and dissipation in de Sitter space.
      Willy Fischler, Phuc H. Nguyen, Juan F. Pedraza and Walter Tangarife.
      JHEP 1408 (2014) 028, arXiv:1404.0347.

    19. Implications of a dark sector U(1) for gamma ray bursts.
      Tom Banks, Willy Fischler, Dustin Lorshbough and Walter Tangarife.
      Phys. Rev. D90 (2014) 043538, arXiv:1403.6844.

    20. Vector-like Fields, Messenger Mixing and the Higgs mass in Gauge Mediation.
      Willy Fischler and Walter Tangarife.
      JHEP 1405 (2014) 151, arXiv:1310.6369.

    21. A Singlet Extension of the MSSM with a Dark Matter Portal.
      Alejandro de la Puente and Walter Tangarife.
      JHEP 1407 (2014) 087, arXiv:1309.6359.

    22. Strong Subadditivity, Null Energy Condition and Charged Black Holes.
      Elena Caceres, Arnab Kundu, Juan F. Pedraza, Walter Tangarife.
      JHEP 1401 (2014) 084, arXiv:1304.3398.

    23. Quantum Fluctuations in Holographic Theories with Hyperscaling Violation.
      Mohammad Edalati, Juan F. Pedraza, Walter Tangarife Garcia.
      Phys. Rev. D 87, 046001 (2013), arXiv:1210.6993.

    24. Holographic Brownian Motion in Magnetic Environments.
      Willy Fischler, Juan F. Pedraza, Walter Tangarife Garcia.
      JHEP 1212 (2012) 002, arXiv:1209.1044.

    25. Fast Scramblers and Non-Commutative Gauge Theories
      Mohammad Edalati, Willy Fischler, Juan F. Pedraza, Walter Tangarife Garcia.
      JHEP 1207 (2012) 043, arXiv:1204.5748.

    26. Hierarchies of Susy Splittings in Holographic Gauge Mediation.
      W. Fischler and W. Tangarife Garcia.
      JHEP 1106 (2011) 046, arXiv:1104.2078.

    27. Hierarchies of Susy Splittings and Invisible Photinos as Dark Matter
      W. Fischler and W. Tangarife Garcia.
      JHEP 1101 (2011) 025, arXiv:1011.0099.
    You can find more information about my published research on the INSPIRE HEP database.
    My research is currently supported by the National Science Foundation under grant No. PHY-2310224, and was supported by PHY-2013052 during 2020-2023. Any opinions, findings, and conclusions or recommendations expressed in my research material are those of the author(s) and do not necessarily reflect the views of the NSF.






    Undergraduate students

    Dark matter Neutrinos Particle Physics
    Sterile Neutrinos Hidden Sector AdS/CFT Supersymmetry Cosmology Dark sectors Particle phenomenology








    LUROP Fellowships

    Loyola offers several research fellowships for undergraduates through the Loyola Undergraduate Research Opportunities Program (LUROP). The following students have received one of these fellowships under my mentorship.

  • Sofija Brnovich, Mulcahy Fellow 2024-2025.
  • Hope Elgart, Mulcahy Fellow 2024-2025.
  • Bennett Korotko, Mulcahy Fellow 2024-2025.
  • Andrew Rogers, Mulcahy Fellow 2023-2024.
  • Themistoklis Tzellos, Mulcahy Fellow 2023-2024.
  • Kiet Nguyen, Mulcahy Fellow 2021-2022 and 2022-2023.
  • Zach Long, Mulcahy Fellow 2021-2022.
  • Grace Bratrud, Mulcahy Fellow 2020-2021.
  • Jack Kraus, Mulcahy Fellow 2020-2021.
  • Luke Ignell, Mulcahy Fellow 2020-2021.

    Student project topics

    These are some of the topics on which my students have worked recently:

  • Sterile neutrino dark matter.
  • The relic abundance of dark matter - beyond the WIMP paradigm.
  • Ultra light dark matter.
  • Gravitational waves.
  • Black holes and the membrane paradigm
  • FRW cosmology and the Hubble tension.

    Current students

  • Babel Barm
  • Sofija Brnovich
  • Hope Elgart
  • Bennett Korotko
  • Daniel O'Shea
  • Cole Owen Bucholtz

    Former students

  • Alex Lewis '24. PhD (Physics) student at Michigan State U
  • Andrew Rogers '24. PhD (Mathematics) student at Utah State U
  • Themistoklis Tzellos '24. PhD (Physics) student at The University of Texas at Austin
  • Zach Long '23. MSc (Medical Physics) student at Duke U
  • Kiet Nguyen '23. PhD (Physics) student at Texas A&M
  • Grace Bratrud, '22. PhD (Physics) student at Northwestern U
  • Natalie West, '22. PhD (Medical Physics) student at MD Anderson (UT Houston)
  • Michael Harris, '22. Graduate student at George Washington U
  • Maria Nowicki, '21. PhD (Physics) student at U of Pittsburgh
  • Andres Jarquin, '21.
  • Luke Ignell, '21. MD student at Virginia Tech Carilion School of Medicine
  • Serena Watson, '21. MSc (Mechanical Eng.) CU Boulder '23.
  • Matthew Asher, '21.
  • Jack Kraus, '21. Phd (Physics) student at NIU
  • Szymon Kasperek, '20. Phd/Med. School student at UIUC
  • Joseph Summers, '20. MSc (Physics) U of Utah '23.






  • "Nothing is too wonderful to be true, if it be consistent with the laws of nature." M. Faraday.