Measurement of the branching ratio of 0e+e- from 0s produced by KL000 decays in flight

K. S. McFarland; R. A. Briere; E. Cheu; D. A. Harris; G. Makoff; A. Roodman; B. Schwingenheuer; S. V. Somalwar; Y. W. Wah; B. Winstein; R. Winston; K. Arisaka; D. Roberts; W. Slater; M. Weaver; A. R. Barker; E. C. Swallow; G. J. Bock; R. Coleman; M. Crisler; J. Enagonio; R. Ford; Y. B. Hsiung; D. A. Jensen; E. Ramberg; R. Tschirhart; E. M. Collins; G. D. Gollin; T. Nakaya; T. Yamanaka; P. Gu; P. Haas; W. P. Hogan; S. K. Kim; J. N. Matthews; S. S. Myung; S. Schnetzer; G. B. Thomson; Y. Zou

doi:10.1103/PhysRevLett.71.31

Measurement of the branching ratio of 0e+e- from 0s produced by KL000 decays in flight

K. S. McFarland, R. A. Briere, E. Cheu, D. A. Harris, G. Makoff, A. Roodman, B. Schwingenheuer, S. V. Somalwar, Y. W. Wah, B. Winstein, R. Winston, K. Arisaka, D. Roberts, W. Slater, M. Weaver, A. R. Barker, E. C. Swallow, G. J. Bock, R. Coleman, M. CrislerJ. Enagonio, R. Ford, Y. B. Hsiung, D. A. Jensen, E. Ramberg, R. Tschirhart, E. M. Collins, G. D. Gollin, T. Nakaya, T. Yamanaka, P. Gu, P. Haas, W. P. Hogan, S. K. Kim, J. N. Matthews, S. S. Myung, S. Schnetzer, G. B. Thomson, Y. Zou

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Abstract

The Fermilab E799 Collaboration has carried out a search for the rare decay 0e+e- using 0s produced from KL'000 decays in flight. We observe a signal of nine events with an e+e- mass close to the 0 mass where only one event is predicted from other known processes. From this, we measure B(0e+e-,(mee/m0)20. 95) =[7.6-2.8+3.9(stat)0.5(syst)]×10-8, over and above the contribution from 0 Dalitz decays. Correcting for radiative effects, we find this result consistent with theoretical expectations from standard-model processes.

Original language	English (US)
Pages (from-to)	31-34
Number of pages	4
Journal	Physical review letters
Volume	71
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.71.31
State	Published - 1993
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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McFarland, K. S., Briere, R. A., Cheu, E., Harris, D. A., Makoff, G., Roodman, A., Schwingenheuer, B., Somalwar, S. V., Wah, Y. W., Winstein, B., Winston, R., Arisaka, K., Roberts, D., Slater, W., Weaver, M., Barker, A. R., Swallow, E. C., Bock, G. J., Coleman, R., ... Zou, Y. (1993). Measurement of the branching ratio of 0e+e- from 0s produced by KL000 decays in flight. Physical review letters, 71(1), 31-34. https://doi.org/10.1103/PhysRevLett.71.31

McFarland, KS, Briere, RA, Cheu, E, Harris, DA, Makoff, G, Roodman, A, Schwingenheuer, B, Somalwar, SV, Wah, YW, Winstein, B, Winston, R, Arisaka, K, Roberts, D, Slater, W, Weaver, M, Barker, AR, Swallow, EC, Bock, GJ, Coleman, R, Crisler, M, Enagonio, J, Ford, R, Hsiung, YB, Jensen, DA, Ramberg, E, Tschirhart, R, Collins, EM, Gollin, GD, Nakaya, T, Yamanaka, T, Gu, P, Haas, P, Hogan, WP, Kim, SK, Matthews, JN, Myung, SS, Schnetzer, S, Thomson, GB & Zou, Y 1993, 'Measurement of the branching ratio of 0e+e- from 0s produced by KL000 decays in flight', Physical review letters, vol. 71, no. 1, pp. 31-34. https://doi.org/10.1103/PhysRevLett.71.31

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abstract = "The Fermilab E799 Collaboration has carried out a search for the rare decay 0e+e- using 0s produced from KL'000 decays in flight. We observe a signal of nine events with an e+e- mass close to the 0 mass where only one event is predicted from other known processes. From this, we measure B(0e+e-,(mee/m0)20. 95) =[7.6-2.8+3.9(stat)0.5(syst)]×10-8, over and above the contribution from 0 Dalitz decays. Correcting for radiative effects, we find this result consistent with theoretical expectations from standard-model processes.",

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AU - McFarland, K. S.

AU - Briere, R. A.

AU - Cheu, E.

AU - Harris, D. A.

AU - Makoff, G.

AU - Roodman, A.

AU - Schwingenheuer, B.

AU - Somalwar, S. V.

AU - Wah, Y. W.

AU - Winstein, B.

AU - Winston, R.

AU - Arisaka, K.

AU - Roberts, D.

AU - Slater, W.

AU - Weaver, M.

AU - Barker, A. R.

AU - Swallow, E. C.

AU - Bock, G. J.

AU - Coleman, R.

AU - Crisler, M.

AU - Enagonio, J.

AU - Ford, R.

AU - Hsiung, Y. B.

AU - Jensen, D. A.

AU - Ramberg, E.

AU - Tschirhart, R.

AU - Collins, E. M.

AU - Gollin, G. D.

AU - Nakaya, T.

AU - Yamanaka, T.

AU - Gu, P.

AU - Haas, P.

AU - Hogan, W. P.

AU - Kim, S. K.

AU - Matthews, J. N.

AU - Myung, S. S.

AU - Schnetzer, S.

AU - Thomson, G. B.

AU - Zou, Y.

PY - 1993

Y1 - 1993

N2 - The Fermilab E799 Collaboration has carried out a search for the rare decay 0e+e- using 0s produced from KL'000 decays in flight. We observe a signal of nine events with an e+e- mass close to the 0 mass where only one event is predicted from other known processes. From this, we measure B(0e+e-,(mee/m0)20. 95) =[7.6-2.8+3.9(stat)0.5(syst)]×10-8, over and above the contribution from 0 Dalitz decays. Correcting for radiative effects, we find this result consistent with theoretical expectations from standard-model processes.

AB - The Fermilab E799 Collaboration has carried out a search for the rare decay 0e+e- using 0s produced from KL'000 decays in flight. We observe a signal of nine events with an e+e- mass close to the 0 mass where only one event is predicted from other known processes. From this, we measure B(0e+e-,(mee/m0)20. 95) =[7.6-2.8+3.9(stat)0.5(syst)]×10-8, over and above the contribution from 0 Dalitz decays. Correcting for radiative effects, we find this result consistent with theoretical expectations from standard-model processes.

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Measurement of the branching ratio of 0e+e- from 0s produced by KL000 decays in flight

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