Elsevier

Physics Letters B

Volume 256, Issue 1, 28 February 1991, Pages 105-111
Physics Letters B

New upper bound on the electron anti-neutrino mass

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Abstract

A new upper bound ofmv < 13 eV at 95% CL has been obtained on the electron anti-neutrino mass. Thus results is based on a more than tenfold improvement in data relative to our previous measurements of the β-spectrum in 3H decay, and its in conflict with the finite mass of 17 <mv< 40 eV reported by an ITEP group

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Cited by (0)

This experiment was supported in part by a Grant-in-Aid for Scientific Research from the Japanese Ministry of Education, Science and Culture, and by the National Laboratory for High Energy Physics (KEK).

1

Present address: National Laboratory for High Energy Physics (KEK), Tsukuba, Ibaraki 305, Japan.

2

Present address: Fuji Photo Film Co, Fujinomiya, Shizuoka 418, Japan.

3

Present address: Toshiba Co, Tsurumi, Yokohama 230, Japan.

4

Present address: Toshiba Co, Fuchu Works, Tokyo 183, Japan.

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