A calculus for general relativity is developed in which the basic role of tensors is taken over by spinors. The Riemann-Christoffel tensor is written in a spinor form according to a scheme of Witten. It is shown that the curvature of empty space can be uniquely characterized by a totally symmetric four-index spinor which satisfies a first order equation formally identical with one for a zero re...

Particle creation during inflation is considered. It could be important for species whose interaction is of gravitational strength or weaker. A complete but economical formalism is given for spin-zero and spin-half particles, and the particle abundance is estimated on the assumption that the particle mass in the early universe is of order the Hubble parameter H . It is roughly the same for both...

Particle creation during inflation is considered. It could be important for species whose interaction is of gravitational strength or weaker. A complete but economical formalism is given for spin-zero and spin-half particles, and the particle abundance is estimated on the assumption that the particle mass in the early universe is of order the Hubble parameter H. It is roughly the same for both ...

In present paper we construct classical and quantum models of an extended charged particle. One shows that consecutive modelling can be based on the hollow thin-wall charged texture (in the hydrodynamical approach of a perfect fluid) which acquires gravitational mass due to Einstein-Maxwell interaction. We demonstrate that such a model has equilibrium states at the radius equal to the establish...

Elementary particle aspects using beams from accelerators and cosmic rays are compared. An important feature in high energy physics is particle identification in the final state. This technique is used to describe global features of ee-annihilations such as multiplicities and multiplicity distributions of charged hadrons and the relative fractions of pions, kaons and protons. Also the character...

A demonstration that the observed neutrinos are not Majorana particles Abstract It is shown that Majorana neutrinos cannot couple vectorially to the neutral-current SU(2) L x U(1) gauge field of the standard model. The absence of physics beyond the standard model (in particular Higgs-field configurations which lead to Majorana mass terms) is not assumed for this argument. Since the existence of...

Since our understanding of both general relativity and the standard model of elementary particles either with or without supersymmetry is based on singular La-grangians, whose associated Hamiltonian formalism requires Dirac-Bergmann theory of constraints[1], it is very difficult to identify which are the physical degrees of freedom to be used in the description and interpretation of the fundame...

The recent model of Quantum Mechanical Black Holes is discussed and its implications for cosmology, particle structure, low dimensionality and other issues are examined. 1 The ”Ganesha” Quantum Mechanical Black Hole Model It was shown in a previous communication that a typical elementary particle, the electron can be considered to be what was termed a Quantum Mechanical Black Hole (or QMBH), ma...

Hypothetical interactions of Yukawaand power-types have been discussed actively in recent years (for a collection of references on this subject, see [1]). They may be considered as specific corrections to the classical gravitational force at small distances [2]. An alternative interpretation comes from the elementary particle physics. According to the unified gauge theories, supersymmetry and s...