32 research outputs found
Applicability of Heavy Quark Effective Theory to the Radiative Decay
In the context of the observed decay the
applicability of the Heavy Quark Effective Theory (HQET), treating both b and s
as heavy quarks, is examined. We show that the heavy s-quark approximation, as
can be found in the literature, is not reliable.Comment: Plain LaTeX fil
Geometry Of Quantum Evolution And The Coherent State
The geometric approach to quantum mechanics initiated by Berry\u27s remarkable discovery [Proc. R. Soc. London Ser. A 392, 45 (1984)] of the anholonomy of the phase of the wave function and subsequent developments leading to a recent reformulation of the geometry of quantum evolution by Anandan and Aharonov [Phys. Rev. Lett. 65, 1697 (1990)] is shown to find an explicit and suggestive realization through the coherent-state representation
The Harmonic Lattice, Recoilless Transitions, And The Coherent State
The probability for recoilless transitions, relevant for the understanding of x-ray scattering from atoms bound in a crystal (applicable also to elastic scattering of neutrons from solids and to the Mossbauer effect), given by the Debye-Waller factor, is derived in a novel manner using the coherent state basis for the normal mode oscillators describing the harmonic lattice, a method which, while being simple and elegant, also reveals the relationship to a heuristic classical discussion of the problem
Dilepton Yield in Heavy-Ion Collisions with Bose Enhancement of Decay Width
The excess of low invariant mass dilepton yield in heavy ion collisions
arising from reduction in the rho meson mass at finite temperatures is
partially suppressed because of the effect on the width of the rho meson
induced by Bose enhancement, essentially due to emission of pions in a medium
of the pion gas in the central rapidity region. The sensitivity of the effect
on the initial temperature of the hadronic phase is also examined.Comment: Plain latex fil