# Faculty Publications and Research

## Recent Submissions

• (Physics Letters B, 1997)
We examine the effects on baryogenesis of spontaneous $\text{CPT}$ violation in a string-based scenario. Under suitable circumstances, certain $\text{CPT}$-violating terms can produce a large baryon asymmetry at the ...
• (Physics Letters B, 1994)
Recently, a type of null experiment for spacelike neutrinos has been proposed. We examine in detail a class of null tests involving nuclear beta decay or capture in atoms and ions. The most promising candidate systems are ...
• (Physics Letters B, 1985)
We investigate the hypothesis that at least one of the known neutrinos travels faster than light. The current experimental situation is examined within this purview.
• (Nuclear Physics B, )
We define the string space-time symmetries $\text{C,P,T}$ and their products. The effects of nonlocal interactions and the infinite number of particle fields are incorporated using string field theory. At the dynamical ...
• (Physics Letters B, 2015)
Limits on gravitational Čerenkov radiation by cosmic rays are obtained and used to constrain coefficients for Lorentz violation in the gravity sector associated with operators of even mass dimensions, including ...
• (Physics Letters B, 2011)
A three-parameter model of neutrino oscillations based on a simple Lorentz- and $\text{CPT}$-violating texture is presented. The model is consistent with established data and naturally generates low-energy and neutrino–a ...
• (Physics Letters B, 2001)
Photoproduction of neutral-kaon pairs is studied from the perspective of $\text{CP}$ and $\text{CPT}$ studies. Interference of the $\text{P}$- and $\text{S}$-waves, with the former due to diffractive $\phi$ production and ...
• (Physics Letters B, 2001)
The derivation of cross sections and decay rates in the Lorentz-violating Standard Model extension is discussed. General features of the physics are described, and some conceptual and calculational issues are addressed. ...
• (Physics Letters B, 1997)
We examine the effects on baryogenesis of spontaneous $\text{CPT}$ violation in a string-based scenario. Under suitable circumstances, certain $\text{CPT}$-violating terms can produce a large baryon asymmetry at the ...
• (Physics Letters B, 1996)
The issue of spontaneous breaking of Lorentz and $\text{CPT}$ invariance is studied in the open bosonic string using a truncation scheme to saturate the string-field action at successively higher levels. We find strong ...
• (Physics Letters B, 1995)
The issue of testing $\text{CPT}$ invariance at a $\text{B}$ factory is considered. We present asymmetries that permit a clean extraction of quantities parametrizing direct and indirect $\text{CPT}$ violation, using ...
• (Physics Letters B, 2011)
Effective field theories with explicit Lorentz violation are intimately linked to Riemann–Finsler geometry. The quadratic single-fermion restriction of the Standard-Model Extension provides a rich source of pseudo-Riemann–Finsler ...
• (American Physical Society, 2016)
The prospects are explored for testing Lorentz and $\text{CPT}$ symmetry in the top-quark sector. We present the relevant Lagrange density, discuss physical observables, and describe the signals to be sought in experiments. ...
• (American Physical Society, 2015)
The potential of precision spectroscopy as a tool in systematic searches for effects of Lorentz and $\text{CPT}$ violation is investigated. Systems considered include hydrogen, antihydrogen, deuterium, positronium, and ...
• (American Physical Society, 2015)
A search for sidereal variations in the force between two planar tungsten oscillators separated by about 80 $\mu m$ sets the first experimental limits on Lorentz violation involving quadratic couplings of the Riemann ...
• (Elsevier, 2010)
Classical point-particle relativistic lagrangians are constructed that generate the momentum–velocity and dispersion relations for quantum wave packets in Lorentz-violating effective field theory.
• (IOP Publishing, 2008)
A general framework for tests of Lorentz invariance with electromagnetic waves is presented, allowing for operators of arbitrary mass dimension. Signatures of Lorentz violations include vacuum birefringence, vacuum dispersion, ...
• (Elsevier, 2005)
Gauge-noninvariant vector field theories with superficially nonrenormalizable nonpolynomial interactions are studied. We show that nontrivial relevant and stable theories have spontaneous Lorentz violation, and we present ...
• (Elsevier, 2012)
Bipartite Riemann–Finsler geometries with complementary Finsler structures are constructed. Calculable examples are presented based on a bilinear-form coefficient for explicit Lorentz violation.
• (American Physical Society, 2000)
A search for sidereal variations in the frequency difference between co-located $^{129}\text{Xe}$ and $^{3}\text{He}$ Zeeman masers sets the most stringent limit to date on leading-order Lorentz and $CPT$ violation involving ...