Simple quantum mechanics explains GSI Darmstadt oscillations Even with undetected neutrino; Momentum conservation requires Same interference producing oscillations in initial and final states - High Energy Physics - PhenomenologyReportar como inadecuado




Simple quantum mechanics explains GSI Darmstadt oscillations Even with undetected neutrino; Momentum conservation requires Same interference producing oscillations in initial and final states - High Energy Physics - Phenomenology - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: GSI experiment studying oscillations in K-capture decay of radioactive ioninvestigates neutrino masses and mixing without detecting neutrino. Even whenneutrino is not detected quantum mechanics relates initial and final states.The basic physics is very simple. Neutrinos emitted in beta decay are coherentlinear combinations of states with different masses, different momenta and sameenergy. Since the weak interaction producing the neutrino conserves momentum,the initial state before the transition must also contain a coherent linearcombination of states with the same momentum difference and a well definedrelative magnitude and phase. A one-particle state with a definite momentumdifference also has an easily calculated energy difference. In the timeinterval between creation of the ion and its decay a linear combination of twostates with different energies oscillates in time. Measuring the oscillationperiod gives a value for the difference between squared neutrino masses of thetwo neutrino mass eigenstates. The value obtained from a crude approximationwith no free parameters for this -two-slit- or -which path- experiment inmomentum space differs by less than 10% from the result observed in the KAMLANDexperiment. Observing only ion disappearance without detecting neutrino avoidssignal suppression by low neutrino absorption cross section



Autor: Harry J. Lipkin

Fuente: https://arxiv.org/







Documentos relacionados