Fermion helicity flip induced by torsion field

Capozziello, Salvatore; Iovane, Gerardo; Lambiase, Gaetano; Stornaiolo, Cosimo

doi:10.1209/epl/i1999-00323-8

Cited by 34 publications

(41 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Neutrino oscillation in non-inertial frame has also drawn some attention recently ( [28], [29]). There have been extensive study of Neutrino oscillation in spacetime with both curvature and torsion ( [30], [31]). …”

Section: Introductionmentioning

confidence: 99%

Constraining alternative gravity theories using the solar neutrino problem

Chakraborty

2014

Class. Quantum Grav.

View full text Add to dashboard Cite

Abstract. The neutrino flavor oscillation is studied in some classes of alternative gravity theories in a plane specified by θ = π/2, exploiting the spherical symmetry and general equations for oscillation phases are given. We first calculate the phase in a general static spherically symmetric model and then we discuss some spherically symmetric solutions in alternative gravity theories. Among them we discuss the effect of cosmological term in Schwarzschild-(anti)de Sitter solution, which is the vacuum solution in F (R) theory, the effect of charge and Gauss-Bonnet coupling parameter on the oscillation phase is presented. Finally we discuss a charged solution with spherical symmetry in F (R) theory and also its implication to the oscillation phase. We calculate the oscillation length and transition probability in these spherically symmetric spacetime and have presented a graphical representation for transition probability with various choice for parameters in our theory. From this we have constrained parameters appearing in these alternative theories using standard solar neutrino results.Constraining alternative gravity theories using the solar neutrino problem 2

show abstract

Section: Introductionmentioning

confidence: 99%

Constraining alternative gravity theories using the solar neutrino problem

Chakraborty

2014

Class. Quantum Grav.

View full text Add to dashboard Cite

show abstract

“…An interesting set of potential explanations of this effect has been put forward in Refs. [29,30,38,39].…”

Section: Analysis Of the Chern-simons-like Coupling In A Scalar-tensomentioning

confidence: 99%

“…The motivation to consider such a background with torsion was already discussed [29,30]. On the other hand, the assumption that gravity may be intermediated by a scalar field(or, more generally, by many scalar fields), in addition to the usual tensor field, has been considerably reassessed over the recent years.…”

Section: Introductionmentioning

confidence: 99%

Lorentz-breaking effects in scalar-tensor theories of gravity

2005

View full text Add to dashboard Cite

In this work, we study the effects of breaking Lorentz symmetry in scalar-tensor theories of gravity taking torsion into account. We show that a space-time with torsion interacting with a Maxwell field by means of a Chern-Simons-like term is able to explain the optical activity in syncrotron radiation emitted by cosmological distant radio sources. Without specifying the source of the dilaton-gravity, we study the dilaton-solution. We analyse the physical implications of this result in the Jordan-Fierz frame. We also analyse the effects of the Lorentz breaking in the cosmic string formation process. We obtain the solution corresponding to a cosmic string in the presence of torsion by keeping track of the effects of the Chern-Simons coupling and calculate the charge induced on this cosmic string in this framework. We also show that the resulting charged cosmic string gives us important effects concerning the background radiation.The optical activity in this case is also worked out and discussed.

show abstract

“…In the literature, the association of such anisotropy with a torsion background has been considered [18,19,20,21].…”

Section: Introductionmentioning

confidence: 99%

Cosmic optical activity in the spacetime of a scalar-tensor screwed cosmic string

2003

View full text Add to dashboard Cite

Measurements of radio emission from distant galaxies and quasars verify that the polarization vectors of these radiations are not randomly oriented as naturally expected. This peculiar phenomenon suggests that the spacetime intervening between the source and observer may be exhibiting some sort of optical activity, the origin of which is not known. In the present paper we provide a plausible explanation to this phenomenon by investigating the rôle played by a Chern-Simons-like term in the background of an ordinary or superconducting screwed cosmic string in a scalar-tensor gravity. We discuss the possibility that the excess in polarization of the light from radio-galaxies and quasars can be understood as if the electromagnetic waves emitted by these cosmic objects interact with a scalar-tensor screwed cosmic string through a Chern-Simons coupling. We use current astronomical data to constrain possible values for the coupling constant of this theory, and show that it turns out to be: λ ∼ 10 −26 eV, which is two orders of magnitude larger than in string-inspired theories.]

show abstract

Fermion helicity flip induced by torsion field

Cited by 34 publications

References 38 publications

Constraining alternative gravity theories using the solar neutrino problem

Constraining alternative gravity theories using the solar neutrino problem

Lorentz-breaking effects in scalar-tensor theories of gravity

Cosmic optical activity in the spacetime of a scalar-tensor screwed cosmic string

Contact Info

Product

Resources

About