Logan A. Morrison, PhD

Logan A. Morrison, PhD

Postdoctoral Researcher

University of California, Santa Cruz

Biography

As a post-doctoral researcher, I lead research projects, research novel theories of dark matter, use machine learning to discover new physics, and develop software to explore and constrain dark matter models. My current research projects include:

  • Using machine learning to explore high-dimensional parameter spaces.

  • Developing software for accurately computing gamma-ray, positron, and neutrino spectra from GeV-scale dark matter annihilations and decays using form-factors fit to electron/positron collider data.

  • Computing spectra from dark matter annihilations and decays into sterile neutrinos with masses ranging from an eV to the Plank scale.

  • Determining the effects on the cosmic microwave background from models where dark matter briefly re-enters kinetic equilibrium with the Standard Model bath.

Interests
  • Reinforcement Learning
  • Using machine learning for discovering regions of interest in high-energy-physics models
  • Phenomenology of dark matter
  • Direct- and indirect-detection of dark matter
Education
  • Ph.D. in Physics, 2021

    University of California, Santa Cruz

  • M.S. in Physics, 2016

    University of California, Santa Cruz

  • B.S. in Physics and Mathematics, 2015

    Western Washington University

Recent & Upcoming Talks

Thesis Defense
The slides I used for my doctoral thesis defense.
Large-Nightmare Dark Matter
Talk on SU(N) Dark Matter

Recent Publications

Quickly discover relevant content by filtering publications.
(2021). Precision gamma-ray constraints for sub-GeV dark matter models. Journal of Cosmology and Astroparticle Physics.

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(2021). Asymptotic analysis of the Boltzmann equation for dark matter relic abundance. Journal of Cosmology and Astroparticle Physics.

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(2021). Sterile neutrino dark matter from generalized CPT -symmetric early-Universe cosmologies. Physical Review D.

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(2021). Large N-ightmare dark matter. Journal of Cosmology and Astroparticle Physics.

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Experience

 
 
 
 
 
Postdoctoral Researcher
University of California, Santa Cruz
Jan 2022 – Present Santa Cruz, California
(see bio)
 
 
 
 
 
Teaching Assistant
University of California, Santa Cruz
Sep 2015 – Dec 2021 Santa Cruz, California
Led discussion sections for groups of 10 to 30 students from undergraduate physics courses ranging from first-year physics to senior-level mathematical physics and quantum mechanics. Held regular office hours where students could come and get help or advice about navigating their undergraduate physics classes.
 
 
 
 
 
Undergraduate Researcher
Western Washington University
Jan 2013 – Sep 2015 Bellingham, Washington
Research and development of high-performance organic field-effect transistors.
 
 
 
 
 
Physics and Mathematics Tutor
Whatcom Community College
Jan 2011 – Sep 2015 Bellingham, Washington
Tutored first-year physics and mathematics courses ranging from algebra to differential equations and linear algebra.