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Improved Search for Heavy Neutrinos in the Decay πrightarrow eν

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arxiv 1712.03275 v4 pith:TOUFP3VL submitted 2017-12-08 hep-ex

Improved Search for Heavy Neutrinos in the Decay πrightarrow eν

A. Aguilar-Arevalo , M. Aoki , M. Blecher , D.I. Britton , D. vom Bruch , D.A. Bryman , S. Chen , J. Comfort
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S. Cuen-Rochin L. Doria P. Gumplinger A. Hussein Y. Igarashi S. Ito S. Kettell L. Kurchaninov L.S. Littenberg C. Malbrunot R.E. Mischke T. Numao D. Protopopescu A. Sher T. Sullivan D. Vavilov
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classification hep-ex
keywords neutrinosrightarrowdecaymassiveneutrinosearchbeendecays
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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A search for massive neutrinos has been made in the decay $\pi\rightarrow e^+ \nu$. No evidence was found for extra peaks in the positron energy spectrum indicative of pion decays involving massive neutrinos ($\pi\rightarrow e^+ \nu_h$). Upper limits (90 \% C.L.) on the neutrino mixing matrix element $|U_{ei}|^2$ in the neutrino mass region 60--135 MeV/$c^2$ were set, which are %representing an order of magnitude improvement over previous results.

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Cited by 5 Pith papers

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