My research lies at the interface of nuclear and particle physics. I study
charge-symmetry breaking
in the strong interaction,
to the end of understanding how the up and down quarks differing mass
(and electromagnetic interactions) may manifest themselves at low energies.
Recently, I have considered how these effects
impact
the
predictions of CP-violating observables in the Standard Model
and thus the
search for ``new'' physics. Generally, I study
nuclear processes in which the nucleon's quark and gluon
substructure asserts itself, so that I am
also interested in exclusive reactions on nuclear targets at large energies,
and in the structure of
nuclear matter at extremes of density and temperature.
Education
B.S., Physics and Chemistry, Caltech, 1982
M.A., Chemical Physics, Columbia University, 1983
Ph.D., Theoretical Nuclear Physics, M.I.T., 1988
postdocs at Universitaet Heidelberg, CEBAF, Indiana University
Postdoctoral Fellows
Xiaofeng Guo
Graduate Students
Chi Zhang
Selected Publications
S. Gardner and G. Valencia, ``Additional Isospin-Breaking
Effects in epsilon'/epsilon,'' hep-ph/9909202.
S. Gardner, ``How Isospin Violation Mocks `New' Physics: pi0-eta,eta'
Mixing in B -> pi pi Decays,'' hep-ph/9806423, Phys.Rev. D59 (1999) 077502.
S. Gardner, H.B. O'Connell, and A.W. Thomas, ``Rho-Omega Mixing and
Direct CP Violation In Hadronic B Decays,'' hep-ph/9705453,
Phys.Rev.Lett. 80 (1998) 1834.
S. Gardner, C. J. Horowitz, and J. Piekarewicz,
``Charge-Symmetry-Breaking Potentials from Isospin-Violating
Meson-Baryon Coupling Constants,'' Phys. Rev. Lett. 75 (1995) 2462.
S. Gardner, C. J. Horowitz, and J. Piekarewicz, ``Dynamical
Color Correlations in a SU(2) Quark Exchange Model
of Nuclear Matter,'' Phys. Rev. C 50 (1994) 1137.
S. Gardner, ``Color Transparency and Final-State
Interactions in Photonuclear Charmonium Production,''
Phys. Rev. C 48 (1993) 3011.
