Branching ratio measurement of the decay KL → e+e-μ+μ-

A. Alavi-Harati; T. Alexopoulos; M. Arenton; K. Arisaka; S. Averitte; R. F. Barbosa; A. R. Barker; M. Barrio; L. Bellantoni; A. Bellavance; J. Belz; R. Ben-David; D. R. Bergman; E. Blucher; G. J. Bock; C. Bown; S. Bright; E. Cheu; S. Childress; R. Coleman; M. D. Corcoran; G. Corti; B. Cox; M. B. Crisler; A. R. Erwin; R. Ford; A. Glazov; A. Golossanov; G. Graham; J. Graham; K. Hagan; E. Halkiadakis; J. Hamm; K. Hanagaki; S. Hidaka; Y. B. Hsiung; V. Jejer; D. A. Jensen; R. Kessler; H. G.E. Kobrak; J. La Due; A. Lath; A. Ledovskoy; P. L. Mc Bride; P. Mikelsons; E. Monnier; T. Nakaya; K. S. Nelson; H. Nguyen; V. O. Dell; M. Pang; R. Pordes; V. Prasad; B. Quinn; X. R. Qi; E. J. Ramberg; R. E. Ray; A. Roodman; M. Sadamoto; S. Schnetzer; K. Senyo; P. Shanahan; P. S. Shawhan; J. Shields; W. Slater; N. Solomey; S. V. Somalwar; R. L. Stone; E. C. Swallow; S. A. Taegar; R. J. Tesarek; G. B. Thomson; P. A. Toale; A. Tripathi; R. Tschirhart; S. E. Turner; Y. W. Wah; J. Wang; H. B. White; J. Whitmore; B. Winstein; R. Winston; T. Yamanaka

doi:10.1103/PhysRevLett.87.111802

Branching ratio measurement of the decay K_L → e⁺e-μ⁺μ-

A. Alavi-Harati, T. Alexopoulos, M. Arenton, K. Arisaka, S. Averitte, R. F. Barbosa, A. R. Barker, M. Barrio, L. Bellantoni, A. Bellavance, J. Belz, R. Ben-David, D. R. Bergman, E. Blucher, G. J. Bock, C. Bown, S. Bright, E. Cheu, S. Childress, R. ColemanM. D. Corcoran, G. Corti, B. Cox, M. B. Crisler, A. R. Erwin, R. Ford, A. Glazov, A. Golossanov, G. Graham, J. Graham, K. Hagan, E. Halkiadakis, J. Hamm, K. Hanagaki, S. Hidaka, Y. B. Hsiung, V. Jejer, D. A. Jensen, R. Kessler, H. G.E. Kobrak, J. La Due, A. Lath, A. Ledovskoy, P. L. Mc Bride, P. Mikelsons, E. Monnier, T. Nakaya, K. S. Nelson, H. Nguyen, V. O. Dell, M. Pang, R. Pordes, V. Prasad, B. Quinn, X. R. Qi, E. J. Ramberg, R. E. Ray, A. Roodman, M. Sadamoto, S. Schnetzer, K. Senyo, P. Shanahan, P. S. Shawhan, J. Shields, W. Slater, N. Solomey, S. V. Somalwar, R. L. Stone, E. C. Swallow, S. A. Taegar, R. J. Tesarek, G. B. Thomson, P. A. Toale, A. Tripathi, R. Tschirhart, S. E. Turner, Y. W. Wah, J. Wang, H. B. White, J. Whitmore, B. Winstein, R. Winston, T. Yamanaka

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

We have collected a 43 event sample of the decay K_L → e⁺e-μ⁺μ- with negligible backgrounds and measured its branching ratio to be (2.62 ± 0.40 ± 0.17) × 10^-9. We see no evidence for CP violation in this decay. In addition, we set the 90% confidence upper limit on the combined branching ratios for the lepton flavor violating decays K_L → e^±e^± μ^∓μ^∓ at B(K_L → e^±e^±μ^∓ μ^∓) ≤ 1.23 × 10^-10, assuming a uniform phase space distribution.

Original language	English (US)
Pages (from-to)	111802
Number of pages	1
Journal	Physical review letters
Volume	87
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevLett.87.111802
State	Published - Jan 1 2001

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.87.111802

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Alavi-Harati, A., Alexopoulos, T., Arenton, M., Arisaka, K., Averitte, S., Barbosa, R. F., Barker, A. R., Barrio, M., Bellantoni, L., Bellavance, A., Belz, J., Ben-David, R., Bergman, D. R., Blucher, E., Bock, G. J., Bown, C., Bright, S., Cheu, E., Childress, S., ... Yamanaka, T. (2001). Branching ratio measurement of the decay K_L → e⁺e-μ⁺μ-. Physical review letters, 87(11), 111802. https://doi.org/10.1103/PhysRevLett.87.111802

Alavi-Harati, A, Alexopoulos, T, Arenton, M, Arisaka, K, Averitte, S, Barbosa, RF, Barker, AR, Barrio, M, Bellantoni, L, Bellavance, A, Belz, J, Ben-David, R, Bergman, DR, Blucher, E, Bock, GJ, Bown, C, Bright, S, Cheu, E, Childress, S, Coleman, R, Corcoran, MD, Corti, G, Cox, B, Crisler, MB, Erwin, AR, Ford, R, Glazov, A, Golossanov, A, Graham, G, Graham, J, Hagan, K, Halkiadakis, E, Hamm, J, Hanagaki, K, Hidaka, S, Hsiung, YB, Jejer, V, Jensen, DA, Kessler, R, Kobrak, HGE, La Due, J, Lath, A, Ledovskoy, A, Mc Bride, PL, Mikelsons, P, Monnier, E, Nakaya, T, Nelson, KS, Nguyen, H, Dell, VO, Pang, M, Pordes, R, Prasad, V, Quinn, B, Qi, XR, Ramberg, EJ, Ray, RE, Roodman, A, Sadamoto, M, Schnetzer, S, Senyo, K, Shanahan, P, Shawhan, PS, Shields, J, Slater, W, Solomey, N, Somalwar, SV, Stone, RL, Swallow, EC, Taegar, SA, Tesarek, RJ, Thomson, GB, Toale, PA, Tripathi, A, Tschirhart, R, Turner, SE, Wah, YW, Wang, J, White, HB, Whitmore, J, Winstein, B, Winston, R & Yamanaka, T 2001, 'Branching ratio measurement of the decay K_L → e⁺e-μ⁺μ-', Physical review letters, vol. 87, no. 11, pp. 111802. https://doi.org/10.1103/PhysRevLett.87.111802

@article{8bb71ba5eef0470c8b0301c71d3b0478,

title = "Branching ratio measurement of the decay KL → e+e-μ+μ-",

abstract = "We have collected a 43 event sample of the decay KL → e+e-μ+μ- with negligible backgrounds and measured its branching ratio to be (2.62 ± 0.40 ± 0.17) × 10-9. We see no evidence for CP violation in this decay. In addition, we set the 90% confidence upper limit on the combined branching ratios for the lepton flavor violating decays KL → e±e± μ∓μ∓ at B(KL → e±e±μ∓ μ∓) ≤ 1.23 × 10-10, assuming a uniform phase space distribution.",

author = "A. Alavi-Harati and T. Alexopoulos and M. Arenton and K. Arisaka and S. Averitte and Barbosa, {R. F.} and Barker, {A. R.} and M. Barrio and L. Bellantoni and A. Bellavance and J. Belz and R. Ben-David and Bergman, {D. R.} and E. Blucher and Bock, {G. J.} and C. Bown and S. Bright and E. Cheu and S. Childress and R. Coleman and Corcoran, {M. D.} and G. Corti and B. Cox and Crisler, {M. B.} and Erwin, {A. R.} and R. Ford and A. Glazov and A. Golossanov and G. Graham and J. Graham and K. Hagan and E. Halkiadakis and J. Hamm and K. Hanagaki and S. Hidaka and Hsiung, {Y. B.} and V. Jejer and Jensen, {D. A.} and R. Kessler and Kobrak, {H. G.E.} and {La Due}, J. and A. Lath and A. Ledovskoy and {Mc Bride}, {P. L.} and P. Mikelsons and E. Monnier and T. Nakaya and Nelson, {K. S.} and H. Nguyen and Dell, {V. O.} and M. Pang and R. Pordes and V. Prasad and B. Quinn and Qi, {X. R.} and Ramberg, {E. J.} and Ray, {R. E.} and A. Roodman and M. Sadamoto and S. Schnetzer and K. Senyo and P. Shanahan and Shawhan, {P. S.} and J. Shields and W. Slater and N. Solomey and Somalwar, {S. V.} and Stone, {R. L.} and Swallow, {E. C.} and Taegar, {S. A.} and Tesarek, {R. J.} and Thomson, {G. B.} and Toale, {P. A.} and A. Tripathi and R. Tschirhart and Turner, {S. E.} and Wah, {Y. W.} and J. Wang and White, {H. B.} and J. Whitmore and B. Winstein and R. Winston and T. Yamanaka",

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month = jan,

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doi = "10.1103/PhysRevLett.87.111802",

language = "English (US)",

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T1 - Branching ratio measurement of the decay KL → e+e-μ+μ-

AU - Alavi-Harati, A.

AU - Alexopoulos, T.

AU - Arenton, M.

AU - Arisaka, K.

AU - Averitte, S.

AU - Barbosa, R. F.

AU - Barker, A. R.

AU - Barrio, M.

AU - Bellantoni, L.

AU - Bellavance, A.

AU - Belz, J.

AU - Ben-David, R.

AU - Bergman, D. R.

AU - Blucher, E.

AU - Bock, G. J.

AU - Bown, C.

AU - Bright, S.

AU - Cheu, E.

AU - Childress, S.

AU - Coleman, R.

AU - Corcoran, M. D.

AU - Corti, G.

AU - Cox, B.

AU - Crisler, M. B.

AU - Erwin, A. R.

AU - Ford, R.

AU - Glazov, A.

AU - Golossanov, A.

AU - Graham, G.

AU - Graham, J.

AU - Hagan, K.

AU - Halkiadakis, E.

AU - Hamm, J.

AU - Hanagaki, K.

AU - Hidaka, S.

AU - Hsiung, Y. B.

AU - Jejer, V.

AU - Jensen, D. A.

AU - Kessler, R.

AU - Kobrak, H. G.E.

AU - La Due, J.

AU - Lath, A.

AU - Ledovskoy, A.

AU - Mc Bride, P. L.

AU - Mikelsons, P.

AU - Monnier, E.

AU - Nakaya, T.

AU - Nelson, K. S.

AU - Nguyen, H.

AU - Dell, V. O.

AU - Pang, M.

AU - Pordes, R.

AU - Prasad, V.

AU - Quinn, B.

AU - Qi, X. R.

AU - Ramberg, E. J.

AU - Ray, R. E.

AU - Roodman, A.

AU - Sadamoto, M.

AU - Schnetzer, S.

AU - Senyo, K.

AU - Shanahan, P.

AU - Shawhan, P. S.

AU - Shields, J.

AU - Slater, W.

AU - Solomey, N.

AU - Somalwar, S. V.

AU - Stone, R. L.

AU - Swallow, E. C.

AU - Taegar, S. A.

AU - Tesarek, R. J.

AU - Thomson, G. B.

AU - Toale, P. A.

AU - Tripathi, A.

AU - Tschirhart, R.

AU - Turner, S. E.

AU - Wah, Y. W.

AU - Wang, J.

AU - White, H. B.

AU - Whitmore, J.

AU - Winstein, B.

AU - Winston, R.

AU - Yamanaka, T.

PY - 2001/1/1

Y1 - 2001/1/1

N2 - We have collected a 43 event sample of the decay KL → e+e-μ+μ- with negligible backgrounds and measured its branching ratio to be (2.62 ± 0.40 ± 0.17) × 10-9. We see no evidence for CP violation in this decay. In addition, we set the 90% confidence upper limit on the combined branching ratios for the lepton flavor violating decays KL → e±e± μ∓μ∓ at B(KL → e±e±μ∓ μ∓) ≤ 1.23 × 10-10, assuming a uniform phase space distribution.

AB - We have collected a 43 event sample of the decay KL → e+e-μ+μ- with negligible backgrounds and measured its branching ratio to be (2.62 ± 0.40 ± 0.17) × 10-9. We see no evidence for CP violation in this decay. In addition, we set the 90% confidence upper limit on the combined branching ratios for the lepton flavor violating decays KL → e±e± μ∓μ∓ at B(KL → e±e±μ∓ μ∓) ≤ 1.23 × 10-10, assuming a uniform phase space distribution.

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UR - http://www.scopus.com/inward/citedby.url?scp=85037195960&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.87.111802

DO - 10.1103/PhysRevLett.87.111802

M3 - Article

AN - SCOPUS:85037195960

SN - 0031-9007

VL - 87

SP - 111802

JO - Physical review letters

JF - Physical review letters

IS - 11

ER -

Branching ratio measurement of the decay K_L → e⁺e-μ⁺μ-

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