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11 papers · 1 filter
Baryon Chiral Perturbation Theory up to Next-to-Leading Order
J. W. Bos, D. W. Chang, S. C. Lee +2
We examine the general lagrangian for baryon chiral perturbation theory with SU(3) flavor symmetry, up to the next-to-leading order. We consider both the strong and the weak intera…
Quasilocal Energy-Momentum for Geometric Gravity Theories
Chiang-Mei Chen, James M. Nester, Roh Suan Tung
From a covariant Hamiltonian formulation, using symplectic ideas, we obtain covariant quasilocal energy-momentum boundary expressions for general gravity theories. The expressions…
Can Galactic Observations Be Explained by a Relativistic Gravity Theory?
Vadim V. Zhytnikov, James M. Nester
We consider the possibility of an alternative gravity theory explaining the dynamics of galactic systems without dark matter. From very general assumptions about the structure of a…
A Quadratic Spinor Lagrangian for General Relativity
James M. Nester, Roh Suan Tung
We present a new finite action for Einstein gravity in which the Lagrangian is quadratic in the covariant derivative of a spinor field. Via a new spinor-curvature identity, it is r…
Cross section for in chiral perturbation theory
J. W. Bos, Y. C. Lin, H. H. Shih
We give the amplitude for in leading order chiral perturbation theory. For the case of real photons we calculate the total and differential cross section.…
Effective Lagrangian Approach to Weak Radiative Decays of Heavy Hadrons
Hai-Yang Cheng, Chi-Yee Cheung, Guey-Lin Lin +3
Motivated by the observation of the decay by CLEO, we have systematically analyzed the two-body weak radiative decays of bottom and charmed hadrons. There e…