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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Theory of neutrino detection: flavor oscillations and weak values

Full text
Author(s):
Porto-Silva, Yago P. [1, 2] ; de Oliveira, M. C. [1]
Total Authors: 2
Affiliation:
[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, Campinas, SP - Brazil
[2] Max Planck Inst Kernphys, D-69117 Heidelberg - Germany
Total Affiliations: 2
Document type: Journal article
Source: EUROPEAN PHYSICAL JOURNAL C; v. 81, n. 4 APR 2021.
Web of Science Citations: 0
Abstract

We revisit the theory of neutrino oscillations and describe it through the formalism of weak measurements with postselection. It is well understood that due to the large momentum uncertainty in detection, there is no collapse of the neutrino wavefunction in the momentum or energy basis, and the mass eigenstates are detected coherently. Here we show that postselection, which projects the system to a final flavor state, deforms the system wavefunction in such a way that the momentum detected is not the expectation value of the neutrino mass eigenstates momenta, but the corresponding weak value. We use the weak values to describe the intermediate state in the oscillation process, avoiding problems in defining probability currents for particle states with mass superposition. (AU)

FAPESP's process: 17/05515-0 - Non-standard neutrino interactions in longbaseline neutrino experiment
Grantee:Yago Philippe Porto Silva
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 19/22961-9 - Coherence and flavor transformations of supernova neutrinos
Grantee:Yago Philippe Porto Silva
Support Opportunities: Scholarships abroad - Research Internship - Doctorate (Direct)