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Type: Artigo de periódico
Title: Flavor and chiral oscillations
Author: Bernardini, AE
De Leo, S
Abstract: We seek a quantum-theoretic expression for the probability that a "fermionic" particle which is initially in a well-defined flavor, linear combination of mass-eigenstates, will be found, at later times, in another flavor state. We approach this problem by using the Dirac equation as evolution equation for the mass-eigenstates. The Dirac formalism is useful and essential in keeping clear many of the conceptual aspects of quantum oscillation phenomena that naturally arise in a relativistic spin one-half particle theory. Our study leads to the conclusion that the fermionic nature of the particles and the interference between positive and negative frequency components of mass-eigenstate wave packets modify the standard oscillation probability, obtained by implicitly assuming a "scalar" nature of the mass-eigenstates. Nevertheless, under particular assumptions, i.e. ultra relativistic particles, strictly peaked momentum distributions and minimal slippage, these modifications introduce correction factors proportional to m(1)(2),(2) /p(0)(2) practically un-detectable by any experimental analysis.
Subject: neutrino
flavor oscillation
Dirac equation
Country: Singapura
Editor: World Scientific Publ Co Pte Ltd
Citation: Modern Physics Letters A. World Scientific Publ Co Pte Ltd, v. 20, n. 9, n. 681, n. 689, 2005.
Rights: fechado
Identifier DOI: 10.1142/S0217732305016130
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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