A Limit on the mass of the neutrino(tau)

Ammar, R.; Baringer, Philip S.; Bean, A.; Besson, D.; Coppage, D.; Darling, C.; Davis, R.; Kotov, S.; Kravchenko, I.; Kwak, N.

doi:10.1016/S0370-2693(98)00539-5

A Limit on the mass of the neutrino(tau)

CLEO

Collaboration

Mar, 1998

15 pages

Published in:

Phys.Lett.B 431 (1998) 209-218

e-Print:

hep-ex/9803031 [hep-ex]

DOI:

10.1016/S0370-2693(98)00539-5

PDG:

{{\mathit \nu}}

MASS (tau based)

Report number:

SLAC-REPRINT-1998-092,
CLNS-98-1551,
CLEO-98-6

Experiments:

CESR-CLEO-II

View in:

pdf

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Abstract:

A limit on the mass of the tau neutrino is derived from 4.5 million tau pairs produced in an integrated luminosity of 5.0 fb^{-1} of electron-positron annihilation to tau pairs at center of mass energies near 10.6 GeV. The measurement technique involves a two-dimensional extended likelihood analysis, including the dependence of the end-point population on the neutrino mass, and allows for the first time an explicit background contribution. We use the decays of the tau to five charged pions and a neutrino as well as the decay to three charged pions, two neutral pions and a neutrino to obtain an upper limit of 30 MeV/c^2 at 95% C.L.

Note:

15 page postscript file, postscript file also available through http://w4.lns.cornell.edu/public/CLNS Report-no: CLNS 98/1551, CLEO 98-6

14.60.Lm
12.15.Ff
13.35.Dx
Tau neutrino mass
electron positron: colliding beams
electron positron: annihilation
tau: electroproduction
tau: pair production
tau: semileptonic decay
neutrino/tau: mass

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