Search for massive neutrinos in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>π</mi><mo>→</mo><mi>e</mi><mi>ν</mi></math></span> decay

N. De Leener-Rosier; J. Deutsch; M. Lebrun; O. Naviliat-Cuncic; R. Prieels; C. Amsler; L. van Elmbt; M. Schaad; P. Truöl; Cl. Joseph; J. P. Perroud; M. T. Tran

doi:10.1103/PhysRevD.43.3611

Search for massive neutrinos in $π \to e ν$ decay

N. De Leener-Rosier, J. Deutsch, M. Lebrun, O. Naviliat-Cuncic, R. Prieels, C. Amsler, L. van Elmbt, M. Schaad, P. Truöl, Cl. Joseph, J. P. Perroud, and M. T. Tran

Phys. Rev. D 43, 3611 – Published 1 June 1991

Abstract

We describe the details of an experiment designed to search for the admixture of massive neutrinos into electron-flavor neutrinos by observation with high resolution of the positron momentum spectrum in $π \to e + ν$ decay. No indication was found for such an admixture and the corresponding mixing amplitude was constrained below the $U_{ei}^{2} \leq 10^{- 6}$ region for neutrinos of ∼30 MeV/ $c^{2}$ mass.

Received 8 August 1990

DOI:https://doi.org/10.1103/PhysRevD.43.3611

Authors & Affiliations

N. De Leener-Rosier, J. Deutsch, M. Lebrun, O. Naviliat-Cuncic^*, and R. Prieels

Institut de Physique Nucléaire, Université Catholique de Louvain, Chemin du Cyclotron, 2, B-1348 Louvain-la Neuve, Belgium

C. Amsler, L. van Elmbt^†, M. Schaad^‡, and P. Truöl

Physik-Institut der Universität Zürich, Schönberggasse, 9, CH-8001, Zurich, Switzerland

Cl. Joseph, J. P. Perroud, and M. T. Tran

Institut de Physique Nucléaire, Université de Lausanne, Dorigny, CH-1010 Lausanne, Switzerland

^*Present address: Institut für Mittelenergiephysik, CH-8093 Zurich, Switzerland.
^†Present address: Cliniques Universitaires St Luc, UCL, Louvain-en-Woluwe, Belgium.
^‡Present address: Elektrowatt Ingenieur Unternehmungen, 8001 Zurich, Switzerland.

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Vol. 43, Iss. 11 — 1 June 1991

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Physical Review D

covering particles, fields, gravitation, and cosmology