Upper bound on the τ-neutrino mass from the previously unobserved decay mode τ→KKπντ

G. B. Mills; T. Pal; W. B. Atwood; P. H. Baillon; B. C. Barish; G. R. Bonneaud; A. Courau; G. J. Donaldson; R. Dubois; M. M. Duro; E. E. Elsen; S. G. Gao; Y. Z. Huang; G. M. Irwin; R. P. Johnson; H. Kichimi; J. Kirkby; D. E. Klem; D. E. Koop; J. Ludwig; A. Ogawa; D. Perret-Gallix; R. Pitthan; D. L. Pollard; C. Y. Prescott; L. Z. Rivkin; L. S. Rochester; W. Ruckstuhl; M. Sakuda; S. S. Sherman; E. J. Siskind; R. Stroynowski; S. Q. Wang; S. G. Wojcicki; H. Yamamoto; W. G. Yan; C. C. Young

doi:10.1103/PhysRevLett.54.624

Upper bound on the τ-neutrino mass from the previously unobserved decay mode τ→KKπντ

G. B. Mills, T. Pal, W. B. Atwood, P. H. Baillon, B. C. Barish, G. R. Bonneaud, A. Courau, G. J. Donaldson, R. Dubois, M. M. Duro, E. E. Elsen, S. G. Gao, Y. Z. Huang, G. M. Irwin, R. P. Johnson, H. Kichimi, J. Kirkby, D. E. Klem, D. E. Koop, J. LudwigA. Ogawa, D. Perret-Gallix, R. Pitthan, D. L. Pollard, C. Y. Prescott, L. Z. Rivkin, L. S. Rochester, W. Ruckstuhl, M. Sakuda, S. S. Sherman, E. J. Siskind, R. Stroynowski, S. Q. Wang, S. G. Wojcicki, H. Yamamoto, W. G. Yan, C. C. Young

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Abstract

We report a measurement of the branching ratios for two decay modes of the τ lepton: RB(τ±→K±Kπ±ντ)=(0.22-0. 11+0.17)% and RB(τ±→K±ππ±(π0)ντ)= (0.22-0.13+0.16)%. The separation of these channels is accomplished in the DELCO detector by use of a gas erenkov counter to identify fast kaons. The invariant-mass distribution of the K±Kπ± system has been used to set an upper bound on the τ neutrino mass of 157 MeV at 95% confidence limit.

Original language	English
Pages (from-to)	624-627
Number of pages	4
Journal	Physical review letters
Volume	54
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.54.624
Publication status	Published - 1985
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.54.624

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Mills, G. B., Pal, T., Atwood, W. B., Baillon, P. H., Barish, B. C., Bonneaud, G. R., Courau, A., Donaldson, G. J., Dubois, R., Duro, M. M., Elsen, E. E., Gao, S. G., Huang, Y. Z., Irwin, G. M., Johnson, R. P., Kichimi, H., Kirkby, J., Klem, D. E., Koop, D. E., ... Young, C. C. (1985). Upper bound on the τ-neutrino mass from the previously unobserved decay mode τ→KKπντ. Physical review letters, 54(7), 624-627. https://doi.org/10.1103/PhysRevLett.54.624

Mills, GB, Pal, T, Atwood, WB, Baillon, PH, Barish, BC, Bonneaud, GR, Courau, A, Donaldson, GJ, Dubois, R, Duro, MM, Elsen, EE, Gao, SG, Huang, YZ, Irwin, GM, Johnson, RP, Kichimi, H, Kirkby, J, Klem, DE, Koop, DE, Ludwig, J, Ogawa, A, Perret-Gallix, D, Pitthan, R, Pollard, DL, Prescott, CY, Rivkin, LZ, Rochester, LS, Ruckstuhl, W, Sakuda, M, Sherman, SS, Siskind, EJ, Stroynowski, R, Wang, SQ, Wojcicki, SG, Yamamoto, H, Yan, WG & Young, CC 1985, 'Upper bound on the τ-neutrino mass from the previously unobserved decay mode τ→KKπντ', Physical review letters, vol. 54, no. 7, pp. 624-627. https://doi.org/10.1103/PhysRevLett.54.624

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title = "Upper bound on the τ-neutrino mass from the previously unobserved decay mode τ→KKπντ",

abstract = "We report a measurement of the branching ratios for two decay modes of the τ lepton: RB(τ±→K±Kπ±ντ)=(0.22-0. 11+0.17)% and RB(τ±→K±ππ±(π0)ντ)= (0.22-0.13+0.16)%. The separation of these channels is accomplished in the DELCO detector by use of a gas erenkov counter to identify fast kaons. The invariant-mass distribution of the K±Kπ± system has been used to set an upper bound on the τ neutrino mass of 157 MeV at 95% confidence limit.",

author = "Mills, {G. B.} and T. Pal and Atwood, {W. B.} and Baillon, {P. H.} and Barish, {B. C.} and Bonneaud, {G. R.} and A. Courau and Donaldson, {G. J.} and R. Dubois and Duro, {M. M.} and Elsen, {E. E.} and Gao, {S. G.} and Huang, {Y. Z.} and Irwin, {G. M.} and Johnson, {R. P.} and H. Kichimi and J. Kirkby and Klem, {D. E.} and Koop, {D. E.} and J. Ludwig and A. Ogawa and D. Perret-Gallix and R. Pitthan and Pollard, {D. L.} and Prescott, {C. Y.} and Rivkin, {L. Z.} and Rochester, {L. S.} and W. Ruckstuhl and M. Sakuda and Sherman, {S. S.} and Siskind, {E. J.} and R. Stroynowski and Wang, {S. Q.} and Wojcicki, {S. G.} and H. Yamamoto and Yan, {W. G.} and Young, {C. C.}",

year = "1985",

doi = "10.1103/PhysRevLett.54.624",

language = "English",

volume = "54",

pages = "624--627",

journal = "Physical Review Letters",

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T1 - Upper bound on the τ-neutrino mass from the previously unobserved decay mode τ→KKπντ

AU - Mills, G. B.

AU - Pal, T.

AU - Atwood, W. B.

AU - Baillon, P. H.

AU - Barish, B. C.

AU - Bonneaud, G. R.

AU - Courau, A.

AU - Donaldson, G. J.

AU - Dubois, R.

AU - Duro, M. M.

AU - Elsen, E. E.

AU - Gao, S. G.

AU - Huang, Y. Z.

AU - Irwin, G. M.

AU - Johnson, R. P.

AU - Kichimi, H.

AU - Kirkby, J.

AU - Klem, D. E.

AU - Koop, D. E.

AU - Ludwig, J.

AU - Ogawa, A.

AU - Perret-Gallix, D.

AU - Pitthan, R.

AU - Pollard, D. L.

AU - Prescott, C. Y.

AU - Rivkin, L. Z.

AU - Rochester, L. S.

AU - Ruckstuhl, W.

AU - Sakuda, M.

AU - Sherman, S. S.

AU - Siskind, E. J.

AU - Stroynowski, R.

AU - Wang, S. Q.

AU - Wojcicki, S. G.

AU - Yamamoto, H.

AU - Yan, W. G.

AU - Young, C. C.

PY - 1985

Y1 - 1985

N2 - We report a measurement of the branching ratios for two decay modes of the τ lepton: RB(τ±→K±Kπ±ντ)=(0.22-0. 11+0.17)% and RB(τ±→K±ππ±(π0)ντ)= (0.22-0.13+0.16)%. The separation of these channels is accomplished in the DELCO detector by use of a gas erenkov counter to identify fast kaons. The invariant-mass distribution of the K±Kπ± system has been used to set an upper bound on the τ neutrino mass of 157 MeV at 95% confidence limit.

AB - We report a measurement of the branching ratios for two decay modes of the τ lepton: RB(τ±→K±Kπ±ντ)=(0.22-0. 11+0.17)% and RB(τ±→K±ππ±(π0)ντ)= (0.22-0.13+0.16)%. The separation of these channels is accomplished in the DELCO detector by use of a gas erenkov counter to identify fast kaons. The invariant-mass distribution of the K±Kπ± system has been used to set an upper bound on the τ neutrino mass of 157 MeV at 95% confidence limit.

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JO - Physical Review Letters

JF - Physical Review Letters

IS - 7

ER -

Upper bound on the τ-neutrino mass from the previously unobserved decay mode τ→KKπντ

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