Showing papers by "Ephraim Fischbach published in 1974"
TL;DR: In this article, the possibility of using neutral weak interactions to see whether neutrinos may flip their helicity was explored, and experiments ranging from low-energy neutrino-nucleus scattering to high-energy inclusive reactions were discussed as tests for the presence of helicity-flipping scalar, pseudoscalar and tensor interactions.
44 citations
TL;DR: An explicit expression for the unit element E of the ring generated by the Duffin-Kemmer-Petiau (DKP) operators βμ is given in this article, where the relation of E to the unit operator I (unit matrix in a matrix representation) is also derived.
Abstract: An explicit expression is given for the unit element E of the ring generated by the Duffin‐Kemmer‐Petiau (DKP) operators βμ. The relation of E to the unit operator I (unit matrix in a matrix representation) is also derived. It is pointed out that one must be careful to distinguish E from I. Bhabha's observation that one may use the irreducible representations (irreps) of the Lie algebra s o (5) to obtain the irreps of the Dirac, DKP, and other algebras is given a concise and general setting in terms of a relation between the Lie algebra s o (n + 1) and a family of semisimple operator rings. We emphasize that for the case n + 1 = 5 this means that there is an underlying relationship between the physical DKP and Dirac algebras and wave equations.
29 citations
TL;DR: In this paper, the most general form of the K 18 current matrix element in the DKP formalism is deduced by using only Lorentz invariance and the fact that the incoming and outgoing meson states are solutions of the k-18 current matrix equation.
Abstract: The most general form of the K 18 current matrix element in the Duffin-Kemmer-Petiau (DKP) formalism is deduced. This is done by two methods: (i) An explicit evaluation of the DKP covariants and (ii) by using only Lorentz invariance and the fact that· the incoming and outgoing meson states are solutions of the DKP equation. The formal reduction of the matrix element is facilitated by introducing particular properties of the spin-0 algebra and fully exploiting the DKP consequent equation. We emphasize that (a) there are only two independent DKP Ku vector form factors, (b) there is only one independent DKP scalar form factor and (c) in, for example, the DKP K*-pole model, there must exist a zero in the DKP current-divergence matrix element.
14 citations
TL;DR: In this paper, it was shown that it is the Duffin-Kemmer-Petiau (DKP) description of mesons rather than the Klein-Gordon (KG) description which can extract a consistent strong-interaction (SIR) ratio.
Abstract: It has been argued that the Duffin-Kemmer-Petiau (DKP) description of mesons fails in predicting meson decay rates and the strong-interaction $\frac{D}{F}$ ratio, while the Klein-Gordon (KG) description succeeds. It is shown here that these arguments are deficient in three respects: (a) The various dynamical assumptions used in comparing the DKP and the KG descriptions preclude a rigorous test of their relative merits at present, except in some particularly simple cases; (b) if the same phenomenological freedom were used in the two descriptions the results could be made similar; and (c) actually, when worked out systematically on the basis of a Lagrangian formalism, it is the DKP rather than the KG description which can extract a consistent strong-interaction $\frac{D}{F}$ ratio.
14 citations