Paul John Ellis (25 May 1941 – 20 February 2005) was a professor of physics at

University of Minnesota The University of Minnesota, formally the University of Minnesota, Twin Cities, (UMN Twin Cities, the U of M, or Minnesota) is a public university, public Land-grant university, land-grant research university in the Minneapolis–Saint Paul, Tw ...

for over 30 years. He is noted for his earlier work examining effective interactions inside nuclei, coupled channel approaches to nuclear reactions, and later work looking at dense nuclear matter inside

neutron stars A neutron star is the collapsed core of a massive supergiant star, which had a total mass of between 10 and 25 solar masses, possibly more if the star was especially metal-rich. Except for black holes and some hypothetical objects (e.g. white ...

and developing a set of effective

lagrangian Lagrangian may refer to: Mathematics * Lagrangian function, used to solve constrained minimization problems in optimization theory; see Lagrange multiplier ** Lagrangian relaxation, the method of approximating a difficult constrained problem with ...

s that take into account scale and

chiral symmetry A chiral phenomenon is one that is not identical to its mirror image (see the article on mathematical chirality). The spin of a particle may be used to define a handedness, or helicity, for that particle, which, in the case of a massless particle, ...

Selected publications

* * * Ellis, P. J. (1990). ''Trends in theoretical physics: Based on the 1988-89 Distinguished-Speaker Colloquium Series of the Theoretical Physics Institute at the University of Minnesota''. Redwood City, Calif: Addison-Wesley.

References

1941 births 2005 deaths American nuclear physicists American astrophysicists University of Minnesota faculty British emigrants to the United States Fellows of the American Physical Society {{US-physicist-stub