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Title: LSND/MiniBooNe excess events and heavy neutrino from {mu} and K decays

Abstract

It has been recently shown that puzzling excess events observed by the LSND and MiniBooNE neutrino experiments could be interpreted as a signal from the radiative decay of a heavy sterile neutrino ({nu}{sub h}) of the mass from 40 to 80 MeV, with a muonic mixing strength |U{sub {mu}h}|{sup 2{approx_equal}}10{sup -3}-10{sup -2}, and the lifetime 10{sup -11}< or approx. {tau}{sub h} < or approx. 10{sup -9} s. We discuss bounds on |U{sub {mu}h}|{sup 2} obtained from the recent precision measurements with muons and show that they are consistent with the above limits. If the {nu}{sub h} exists its admixture in the ordinary muon or kaon decay would result in the decay chain {mu}{yields}e{nu}{sub e{nu}h{yields}}e{nu}{sub e{gamma}{nu}} or K{yields}{mu}{nu}{sub h{yields}{mu}{gamma}{nu}}, respectively. We propose a new experiment for a sensitive search for these processes in {mu} and K decays at rest allowing to either definitively confirm or exclude the existence of the {nu}{sub h}. To our knowledge, no experiment has specifically searched for the signature of radiative decay of massive neutrinos from particle decays as proposed in this work. The search is complementary to the current experimental efforts to clarify the origin of the LSND and MiniBooNE anomalies.

Authors:
 [1]
  1. Institute for Nuclear Research, Moscow 117312 (Russian Federation)
Publication Date:
OSTI Identifier:
21541583
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 83; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevD.83.093010; (c) 2011 American Institute of Physics; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCURACY; KAONS; LIFETIME; MASS; MEV RANGE 10-100; MUONS; NEUTRINOS; RADIATIVE DECAY; BOSONS; DECAY; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; HADRONS; LEPTONS; MASSLESS PARTICLES; MESONS; MEV RANGE; PARTICLE DECAY; PSEUDOSCALAR MESONS; STRANGE MESONS; STRANGE PARTICLES

Citation Formats

Gninenko, S N. LSND/MiniBooNe excess events and heavy neutrino from {mu} and K decays. United States: N. p., 2011. Web. doi:10.1103/PHYSREVD.83.093010.
Gninenko, S N. LSND/MiniBooNe excess events and heavy neutrino from {mu} and K decays. United States. doi:10.1103/PHYSREVD.83.093010.
Gninenko, S N. Sun . "LSND/MiniBooNe excess events and heavy neutrino from {mu} and K decays". United States. doi:10.1103/PHYSREVD.83.093010.
@article{osti_21541583,
title = {LSND/MiniBooNe excess events and heavy neutrino from {mu} and K decays},
author = {Gninenko, S N},
abstractNote = {It has been recently shown that puzzling excess events observed by the LSND and MiniBooNE neutrino experiments could be interpreted as a signal from the radiative decay of a heavy sterile neutrino ({nu}{sub h}) of the mass from 40 to 80 MeV, with a muonic mixing strength |U{sub {mu}h}|{sup 2{approx_equal}}10{sup -3}-10{sup -2}, and the lifetime 10{sup -11}< or approx. {tau}{sub h} < or approx. 10{sup -9} s. We discuss bounds on |U{sub {mu}h}|{sup 2} obtained from the recent precision measurements with muons and show that they are consistent with the above limits. If the {nu}{sub h} exists its admixture in the ordinary muon or kaon decay would result in the decay chain {mu}{yields}e{nu}{sub e{nu}h{yields}}e{nu}{sub e{gamma}{nu}} or K{yields}{mu}{nu}{sub h{yields}{mu}{gamma}{nu}}, respectively. We propose a new experiment for a sensitive search for these processes in {mu} and K decays at rest allowing to either definitively confirm or exclude the existence of the {nu}{sub h}. To our knowledge, no experiment has specifically searched for the signature of radiative decay of massive neutrinos from particle decays as proposed in this work. The search is complementary to the current experimental efforts to clarify the origin of the LSND and MiniBooNE anomalies.},
doi = {10.1103/PHYSREVD.83.093010},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 9,
volume = 83,
place = {United States},
year = {2011},
month = {5}
}