2001/02/28 by Soumitra SenGupta, Aninda Sinha · 32 citations
Physics and Astronomy · #Amplitude #Black Holes and Theoretical Physics #Dirac fermion #Fermion #Helicity #Mathematical physics #Noncommutative and Quantum Gravity Theories #Parity (physics) #Particle physics #Physics #Physics of Superconductivity and Magnetism #Quantum electrodynamics #Quantum mechanics #Torsion (gastropod) #hep-ph #hep-th
paper · pdf · doi:10.1016/s0370-2693(01)00785-7
published in Physics Letters B 514(1-2), 109-113 (Elsevier BV) · 5 pages, Revtex, Two figures, Title changed in the modified version. Few discussions added.No change in the conclusion. Accepted for publication In Physics Letters B
arxiv created 2001/06/26 · openalex publication_date 2001/08/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The helicity flip of a spin-1/2 Dirac fermion interacting with a torsion- field endowed with a pseudo-tensorial extension is analysed. Taking the torsion to be represented by a Kalb-Ramond field, we show that there is a finite amplitude for helicity flip for massive fermions. The lowest order contribution is proportional to the pseudo-tensor term.