Measurement of the Branching Fraction of the Decay KL→π+π−e+e−

KTeV Collaboration

doi:10.1103/PhysRevLett.80.4123

Measurement of the Branching Fraction of the Decay K_L→π⁺π⁻e⁺e⁻

KTeV Collaboration

Physics

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

31 Scopus citations

Abstract

We report the first branching fraction measurement of the decay K_L→π⁺π⁻e⁺e⁻.With a sample of 46 candidates, and an expected background level of 9.4 events, the branching fraction is determined to be B(K_L→π⁺π⁻e⁺e⁻) = [3.2±0.6(stat)±0.4(syst)]×10⁻⁷.This measurement was carried out as part of the Fermilab KTeV (E799-II) experiment and is in good agreement with the expectations from the mechanisms of direct emission and inner bremsstrahlung.

Original language	English (US)
Pages (from-to)	4123-4126
Number of pages	4
Journal	Physical review letters
Volume	80
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevLett.80.4123
State	Published - 1998

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.80.4123

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@article{9e9a9c2dd0d9447b9f59e9a7dab2919a,

title = "Measurement of the Branching Fraction of the Decay KL→π+π−e+e−",

abstract = "We report the first branching fraction measurement of the decay KL→π+π−e+e−.With a sample of 46 candidates, and an expected background level of 9.4 events, the branching fraction is determined to be B(KL→π+π−e+e−) = [3.2±0.6(stat)±0.4(syst)]×10−7.This measurement was carried out as part of the Fermilab KTeV (E799-II) experiment and is in good agreement with the expectations from the mechanisms of direct emission and inner bremsstrahlung.",

author = "\{KTeV Collaboration\} and J. Adams and A. Alavi-Harati and Albuquerque, \{I. F.\} and T. Alexopoulos and M. Arenton and K. Arisaka and S. Averitte and Barker, \{A. R.\} 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 G. Graham and J. Graham and Hagan, \{K. A.\} and E. Halkiadakis and K. Hanagaki and M. Hazumi and S. Hidaka and Hsiung, \{Y. B.\} and V. Jejer and J. Jennings and Jensen, \{D. A.\} and Johnson, \{P. T.\} and R. Kessler and Kobrak, \{H. G.E.\} and J. LaDue and A. Lath and A. Ledovskoy and McManus, \{A. P.\} and P. Mikelsons and E. Monnier and T. Nakaya and U. Nauenberg and Nelson, \{K. S.\} and H. Nguyen",

year = "1998",

doi = "10.1103/PhysRevLett.80.4123",

language = "English (US)",

volume = "80",

pages = "4123--4126",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "19",

}

TY - JOUR

T1 - Measurement of the Branching Fraction of the Decay KL→π+π−e+e−

AU - KTeV Collaboration

AU - Adams, J.

AU - Alavi-Harati, A.

AU - Albuquerque, I. F.

AU - Alexopoulos, T.

AU - Arenton, M.

AU - Arisaka, K.

AU - Averitte, S.

AU - Barker, A. R.

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 - Graham, G.

AU - Graham, J.

AU - Hagan, K. A.

AU - Halkiadakis, E.

AU - Hanagaki, K.

AU - Hazumi, M.

AU - Hidaka, S.

AU - Hsiung, Y. B.

AU - Jejer, V.

AU - Jennings, J.

AU - Jensen, D. A.

AU - Johnson, P. T.

AU - Kessler, R.

AU - Kobrak, H. G.E.

AU - LaDue, J.

AU - Lath, A.

AU - Ledovskoy, A.

AU - McManus, A. P.

AU - Mikelsons, P.

AU - Monnier, E.

AU - Nakaya, T.

AU - Nauenberg, U.

AU - Nelson, K. S.

AU - Nguyen, H.

PY - 1998

Y1 - 1998

N2 - We report the first branching fraction measurement of the decay KL→π+π−e+e−.With a sample of 46 candidates, and an expected background level of 9.4 events, the branching fraction is determined to be B(KL→π+π−e+e−) = [3.2±0.6(stat)±0.4(syst)]×10−7.This measurement was carried out as part of the Fermilab KTeV (E799-II) experiment and is in good agreement with the expectations from the mechanisms of direct emission and inner bremsstrahlung.

AB - We report the first branching fraction measurement of the decay KL→π+π−e+e−.With a sample of 46 candidates, and an expected background level of 9.4 events, the branching fraction is determined to be B(KL→π+π−e+e−) = [3.2±0.6(stat)±0.4(syst)]×10−7.This measurement was carried out as part of the Fermilab KTeV (E799-II) experiment and is in good agreement with the expectations from the mechanisms of direct emission and inner bremsstrahlung.

UR - https://www.scopus.com/pages/publications/0001485310

UR - https://www.scopus.com/pages/publications/0001485310#tab=citedBy

U2 - 10.1103/PhysRevLett.80.4123

DO - 10.1103/PhysRevLett.80.4123

M3 - Article

AN - SCOPUS:0001485310

SN - 0031-9007

VL - 80

SP - 4123

EP - 4126

JO - Physical review letters

JF - Physical review letters

IS - 19

ER -

Measurement of the Branching Fraction of the Decay K_L→π⁺π⁻e⁺e⁻

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