A bstract Scattering of two Kerr Black Holes emitting gravitational waves can be captured by
an effective theory of a massive higher-spin field interacting with the gravitational field. While …

A bstract We derive manifestly covariant actions of spinning particles starting from coadjoint
orbits of isometry groups, by using Hamiltonian reductions. We show that the defining …

A universal model for a D= 4 spinning particle is constructed with the configuration space
chosen as R 3, 1× S 2, where the sphere corresponds to the spinning degrees of freedom …

In this paper, starting from a pure group-theoretic point of view, we develop an approach to
describing particles with different spins in the framework of a theory of scalar fields on the …

We briefly review models of relativistic particles with spin. Departing from the oldest attempts
to describe the spin within the lagrangian framework we pass throught various non …

CPT groups of higher spin fields are defined in the framework of automorphism groups of
Clifford algebras associated with the complex representations of the proper orthochronous …

We present a geometric formulation for the fractional spin particle models on the minimal
phase–spaces. Consistent couplings of the anyon to background fields are constructed. The …

Experimental data reveal with a 5σ significance the existence of a characteristic minimal
length le= 1.57× 10− 17 cm at the scale E= 1.253 TeV in the annihilation reaction e+ e−→ γγ …

The deformation of the classical action for a point-like particle recently suggested by
Staruszkiewicz gives rise to a spin structure which constrains the values of the invariant …

The measurements of the total cross section of the e+ e−⟶ γγ (γ) reaction from the VENUS,
TOPAS, OPAL, DELPHI, ALEPH, and L3 collaborations, collected between 1989 and 2003 …