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Ritchie Patterson

Helen T. Edwards Professor of Physics

Ritchie Patterson

109 Clark Hall
128 Newman Lab

Educational Background

B.A., 1981, Physics, Cornell University. Ph.D., 1990, Physics, University of Chicago. Research Associate, Cornell Laboratory of Nuclear Studies, 1990-93. Assistant Professor, Physics, Cornell University, 1994-99; Associate Professor, Physics, Cornell University, 1999-2005; Professor, Physics, Cornell University, 2005-present. National Young Investigator, 1994-99; Alfred P. Sloan Fellow, 1994-96; Fellow, American Physical Society, elected 2003; Provost’s Award for Distinguished Scholarship, 2005; Department Chair 2009-11; Director, Cornell Laboratory for Accelerator-based Sciences and Education (CLASSE), 2012- present; Director, Cornell Laboratory for Accelerator-based Sciences and Education (CLASSE), 2012-2020; Director, Center for Bright Beams, 2016-present.



Experimental particle physics; physics beyond the standard model; weak interactions.


  • Physics

Graduate Fields

  • Physics


  • Cornell Laboratory for Accelerator-based Sciences and Education
  • Laboratory for Elementary-Particle Physics (LEPP)
  • Center for Bright Beams


Our model of elementary particles describes an enormous number of experimental results, but it falls short of explaining phenomena such as dark matter, the disappearance of anti-matter from the universe, and the small size of the radiative corrections to the Higgs mass. My research uses data from the Large Hadron Collider (LHC) to seek the new phenomena and particles that may explain these mysteries.  Specifically, I look for particles with distinctly long lifetimes, since these would be unequivocal evidence for new phenomena and are predicted in numerous models.

In addition to my LHC research, I direct the Center for Bright Beams (CBB), which is an NSF Science and Technology Center that works to increase the brightness of electron beams in order to provide new capabilities for scientific research, industry and medicine.  CBB research, which currently involves ten colleges and universities and three national labs, is exceptionally collaborative and highly interdisciplinary.

Graduate Students
Shaun Hogan
Peace Kotamnives


CMS Collaboration, Search for long-lived particles with displaced vertices in multijet events in proton-proton collisions at sqrt(s)=13 TeV, Phys. Rev. D 98, 092011 (2018).

Search for R-parity violating supersymmetry with displaced vertices in proton-proton collisions at sqrt(S)=8 TeV, Phys. Rev. D. 95 012009 (2017)