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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleFlavor and chiral oscillations with Dirac wave packetspt_BR
dc.contributor.authorBernardini, AEpt_BR
dc.contributor.authorDe Leo, Spt_BR
unicamp.authorState Univ Campinas, Dept Cosm Rays & Chronol, BR-13083970 Campinas, SP, Brazil State Univ Campinas, Dept Appl Math, BR-13083970 Campinas, SP, Brazilpt_BR
dc.subject.wosQuantum-field Theorypt_BR
dc.subject.wosNeutrino Oscillationspt_BR
dc.description.abstractWe report about recent results on Dirac wave packets in the treatment of neutrino flavor oscillation where the initial localization of a spinor state implies an interference between positive and negative energy components of mass-eigenstate wave packets. A satisfactory description of fermionic particles requires the use of the Dirac equation as evolution equation for the mass eigenstates. In this context, a new flavor conversion formula can be obtained when the effects of chiral oscillation are taken into account. Our study leads to the conclusion that the fermionic nature of the particles, where chiral oscillations and the interference between positive and negative frequency components of mass-eigenstate wave packets are implicitly assumed, modifies the standard oscillation probability. Nevertheless, for ultrarelativistic particles and sharply peaked momentum distributions, we can analytically demonstrate that these modifications introduce correction factors proportional to m(1,2)(2)/p(0)(2) which are practically undetectable by any experimental
dc.relation.ispartofPhysical Review Dpt_BR
dc.relation.ispartofabbreviationPhys. Rev. Dpt_BR
dc.publisher.cityCollege Pkpt_BR
dc.publisherAmerican Physical Socpt_BR
dc.identifier.citationPhysical Review D. American Physical Soc, v. 71, n. 7, 2005.pt_BR
dc.sourceWeb of Sciencept_BR
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