Resonant spin–flavour precession of neutrinos and pulsar velocities
نویسنده
چکیده
Young pulsars are known to exhibit large space velocities, up to 10 km/s. We propose a new mechanism for the generation of these large velocities based on an asymmetric emission of neutrinos during the supernova explosion. The mechanism involves the resonant spin–flavour precession of neutrinos with a transition magnetic moment in the magnetic field of the supernova. The asymmetric emission of neutrinos is due to the distortion of the resonance surface by matter polarisation effects in the supernova magnetic field. The requisite values of the field strengths and neutrino parameters are estimated for various neutrino conversions caused by their Dirac or Majorana–type transition magnetic moments. On leave from NRC “Kurchatov Institute”, Moscow 123182, Russia. e-mail address: [email protected] e-mail address: [email protected] Also at International Centre for Theoretical Physics, Strada Costiera 11, I-34100 Trieste, Italy. e-mail address: [email protected]
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