A limit on the lepton-family number violating process π0 → μ±e∓

P. Krolak; R. A. Briere; E. Cheu; D. A. Harris; K. S. McFarland; 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:10.1016/0370-2693(94)90678-5

A limit on the lepton-family number violating process π⁰ → μ^±e^∓

P. Krolak, R. A. Briere, E. Cheu, D. A. Harris, K. S. McFarland, 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

A FNAL E799 Collaboration has carried out a search for the lepton-family number violating decay π⁰ → μ^±e^∓ using π⁰'s produced from K_L → π⁰π⁰π⁰ decays in flight. No events were observed. Assuming that lepton-family number violation is charge independent, the 90% confidence level upper limit on 1 2[BR(π⁰ → μ⁺e^-) + BR(π⁰ → μ^-e⁺)] was determined to be 8.6 × 10^-9.

Original language	English (US)
Pages (from-to)	407-410
Number of pages	4
Journal	Physics Letters B
Volume	320
Issue number	3-4
DOIs	https://doi.org/10.1016/0370-2693(94)90678-5
State	Published - Jan 13 1994
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/0370-2693(94)90678-5

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Krolak, P., Briere, R. A., Cheu, E., Harris, D. A., McFarland, K. S., 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. (1994). A limit on the lepton-family number violating process π⁰ → μ^±e^∓. Physics Letters B, 320(3-4), 407-410. https://doi.org/10.1016/0370-2693(94)90678-5

Krolak, P, Briere, RA, Cheu, E, Harris, DA, McFarland, KS, 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 1994, 'A limit on the lepton-family number violating process π⁰ → μ^±e^∓', Physics Letters B, vol. 320, no. 3-4, pp. 407-410. https://doi.org/10.1016/0370-2693(94)90678-5

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title = "A limit on the lepton-family number violating process π0 → μ±e∓",

abstract = "A FNAL E799 Collaboration has carried out a search for the lepton-family number violating decay π0 → μ±e∓ using π0's produced from KL → π0π0π0 decays in flight. No events were observed. Assuming that lepton-family number violation is charge independent, the 90% confidence level upper limit on 1 2[BR(π0 → μ+e-) + BR(π0 → μ-e+)] was determined to be 8.6 × 10-9.",

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

note = "Funding Information: Support was provided for this experiment by NSF and DOE. We would like to acknowledge contributions to this research by Richard Armstrong, Gene Beck, Rich Kessler, John Krider, Brian Levoy, Greg Makoff, Elizabeth Pod, Harold Sanders, Peter Shawhan, and the Fermi.lab support groups. Two of us (S.K.K. and S.S.M.) would like to acknowledge support from the Korean Science and Engineering Foundation. One of us (Y.W.W.) would like to acknowledge support from an OJI grant from DOE. Another of us (P.K.) submitted this work to partially fulfill the requirements of a B.A. degree with Honors in Physics at the University of Chicago.",

year = "1994",

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doi = "10.1016/0370-2693(94)90678-5",

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T1 - A limit on the lepton-family number violating process π0 → μ±e∓

AU - Krolak, P.

AU - Briere, R. A.

AU - Cheu, E.

AU - Harris, D. A.

AU - McFarland, K. S.

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.

N1 - Funding Information: Support was provided for this experiment by NSF and DOE. We would like to acknowledge contributions to this research by Richard Armstrong, Gene Beck, Rich Kessler, John Krider, Brian Levoy, Greg Makoff, Elizabeth Pod, Harold Sanders, Peter Shawhan, and the Fermi.lab support groups. Two of us (S.K.K. and S.S.M.) would like to acknowledge support from the Korean Science and Engineering Foundation. One of us (Y.W.W.) would like to acknowledge support from an OJI grant from DOE. Another of us (P.K.) submitted this work to partially fulfill the requirements of a B.A. degree with Honors in Physics at the University of Chicago.

PY - 1994/1/13

Y1 - 1994/1/13

N2 - A FNAL E799 Collaboration has carried out a search for the lepton-family number violating decay π0 → μ±e∓ using π0's produced from KL → π0π0π0 decays in flight. No events were observed. Assuming that lepton-family number violation is charge independent, the 90% confidence level upper limit on 1 2[BR(π0 → μ+e-) + BR(π0 → μ-e+)] was determined to be 8.6 × 10-9.

AB - A FNAL E799 Collaboration has carried out a search for the lepton-family number violating decay π0 → μ±e∓ using π0's produced from KL → π0π0π0 decays in flight. No events were observed. Assuming that lepton-family number violation is charge independent, the 90% confidence level upper limit on 1 2[BR(π0 → μ+e-) + BR(π0 → μ-e+)] was determined to be 8.6 × 10-9.

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DO - 10.1016/0370-2693(94)90678-5

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SP - 407

EP - 410

JO - Physics Letters B

JF - Physics Letters B

IS - 3-4

ER -

A limit on the lepton-family number violating process π⁰ → μ^±e^∓

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