Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
- Publication Year
- File Type
Articles 91 - 102 of 102
Full-Text Articles in Physics
Possible Weak Interaction Experiments With Polarized He-3, Br Holstein
Possible Weak Interaction Experiments With Polarized He-3, Br Holstein
Barry R Holstein
No abstract provided.
Forced Harmonic-Oscillator - A Path Integral Approach, Br Holstein
Forced Harmonic-Oscillator - A Path Integral Approach, Br Holstein
Barry R Holstein
The problem of the harmonic oscillator driven by an external force is explored using path integral techniques. The qualitative features of the solution are demonstrated.
Semileptonic Hyperon Decay - A Problem For Chiral Perturbation-Theory, Jf Donoghue, Br Holstein
Semileptonic Hyperon Decay - A Problem For Chiral Perturbation-Theory, Jf Donoghue, Br Holstein
Barry R Holstein
We study the recently computed mk2lnm2k corrections to hyperton beta decay found in chiral perturbation theory. The inclusion of these effects is not compatible with the high precision hyperon data, yielding a fit much inferior to the standard assumption of SU(3) invariance. This incompatibility of data and theory is a problem for the application of chiral perturbation theory.
Renormalization Of The Energy-Momentum Tensor And The Validity Of The Equivalence Principle At Finite Temperature, Jf Donoghue, Br Holstein, Rw Robinett
Renormalization Of The Energy-Momentum Tensor And The Validity Of The Equivalence Principle At Finite Temperature, Jf Donoghue, Br Holstein, Rw Robinett
Barry R Holstein
Using the techniques of finite-temperature field theory we renormalize the electromagnetic and gravitational couplings of an electron which is immersed in a heat bath with T
Predicting The Proton Mass From Pi-Pi-Scattering Data, Jf Donoghue, E Golowich, Br Holstein
Predicting The Proton Mass From Pi-Pi-Scattering Data, Jf Donoghue, E Golowich, Br Holstein
Barry R Holstein
We relate experimental information on ππ scattering to tree-level effective chiral Lagrangians. The result is of a form similar to that used in Skyrme-type models of the proton, where the nucleons are described as topologically stable solitons of the chiral fields. In such models, one can express the proton mass in terms of measured scattering data, with the result Mp=880±300 MeV. We interpret this as a consistency test for the Skyrme models.
Renormalization And Radiative-Corrections At Finite Temperature, Jf Donoghue, Br Holstein
Renormalization And Radiative-Corrections At Finite Temperature, Jf Donoghue, Br Holstein
Barry R Holstein
We discuss the renormalization prescription for fermions at finite temperature and describe the procedure for calculating radiative corrections. Novel features arise, such as a lack of explicit Lorentz invariance, 1k2 singularities, and the absorption of soft photons from the background heat bath. The methods are illustrated by explicit calculation of the electron renormalization and the radiative corrections to H-->e+e- (with H being spin zero) in finite-temperature QED.
Bound-States, Virtual States, And Non-Exponential Decay Via Path-Integrals, Br Holstein
Bound-States, Virtual States, And Non-Exponential Decay Via Path-Integrals, Br Holstein
Barry R Holstein
Using path integral techniques we demonstrate how three quantum-mechanical phenomena-alpha decay, nonexponential decay, and resonant scattering-can be treated. This procedure is an algebraic one yet reproduces the usual results obtained via solution of the Schrödinger equation via WKB methods.
Path-Integrals And The Wkb Approximation, Br Holstein, Ar Swift
Path-Integrals And The Wkb Approximation, Br Holstein, Ar Swift
Barry R Holstein
The WKB approximation is demonstrated to be formally identical to the semiclassical limit of the Feynman path integral propagator. In the limit that the path integral propagator is dominated by the classical particle trajectory, it is identical to the propagator calculated directly from WKB wave functions in the stationary phase approximation.
Comment On Particle Mixing And Delta-I= 3/2 Terms In Non-Leptonic Weak Decays, Br Holstein
Comment On Particle Mixing And Delta-I= 3/2 Terms In Non-Leptonic Weak Decays, Br Holstein
Barry R Holstein
A recent paper by Gusbin concludes that ΔI=3/2 terms in K→πη can substantially modify particle-mixing contributions to K+→π+π0. Using techniques which can successfully reproduce the experimental features of the K→ππ decays, we argue that this seems unlikely.
Implications Of Nuclear Parity Non-Conservation, Jf Donoghue, Br Holstein
Implications Of Nuclear Parity Non-Conservation, Jf Donoghue, Br Holstein
Barry R Holstein
From recent developments in the area of nuclear parity nonconservation we extract evidence for (1) SU(3) /soft-pion breaking in weak pionic vertices, and (2) larger values of quark masses than have been used in previous evaluations of "penguin" matrix elements.
Induced Tensor And Ft Asymmetries, Br Holstein
Induced Tensor And Ft Asymmetries, Br Holstein
Barry R Holstein
Looked at from a model-independent point of view, the existence of a non-zero first class induced tensor form factor appears to provide a substantial contribution to the observed ft asymmetry in mirror Gamow-Teller beta decays. However, we demonstrate that, when analyzed in terms of the impulse approximation, this is only a negligibly small effect. RADIOACTIVITY Calculated contribution to ft asymmetry from first class induced tensor.
Compendium Of Bag-Model Matrix-Elements Of The Weak Non-Leptonic Hamiltonian, Jf Donoghue, E Golowich, Br Holstein, Wa Ponce
Compendium Of Bag-Model Matrix-Elements Of The Weak Non-Leptonic Hamiltonian, Jf Donoghue, E Golowich, Br Holstein, Wa Ponce
Barry R Holstein
A comprehensive list of baryon and meson single-particle matrix elements of the nonleptonic weak Hamiltonian is presented.