Fermion helicity flip induced by torsion field

Author： Capozziello S.   Iovane G.   Lambiase G.   Stornaiolo C.  

Publisher： Edp Sciences

E-ISSN： 1286-4854|46|6|710-715

ISSN： 0295-5075

Source： EPL (EUROPHYSICS LETTERS), Vol.46, Iss.6, 2010-03, pp. : 710-715

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Abstract

We show that in theories of gravitation with torsion the helicityof fermion particles is not conserved and we calculate theprobability of spin flip, which is related to the anti-symmetricpart of affine connection. Some cosmological consequences arediscussed.

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