Measurements of the decay KL→e+e-γ

E. Abouzaid; M. Arenton; A. R. Barker; L. Bellantoni; E. Blucher; G. J. Bock; E. Cheu; R. Coleman; M. D. Corcoran; B. Cox; A. R. Erwin; A. Glazov; A. Golossanov; Y. B. Hsiung; D. A. Jensen; R. Kessler; H. G.E. Kobrak; K. Kotera; J. Ladue; A. Ledovskoy; P. L. McBride; E. Monnier; H. Nguyen; R. Niclasen; E. J. Ramberg; R. E. Ray; M. Ronquest; J. Shields; W. Slater; D. Smith; N. Solomey; E. C. Swallow; P. A. Toale; R. Tschirhart; Y. W. Wah; J. Wang; H. B. White; J. Whitmore; M. J. Wilking; R. Winston; E. T. Worcester; T. Yamanaka; E. D. Zimmerman

doi:10.1103/PhysRevLett.99.051804

Measurements of the decay KL→e+e-γ

E. Abouzaid, M. Arenton, A. R. Barker, L. Bellantoni, E. Blucher, G. J. Bock, E. Cheu, R. Coleman, M. D. Corcoran, B. Cox, A. R. Erwin, A. Glazov, A. Golossanov, Y. B. Hsiung, D. A. Jensen, R. Kessler, H. G.E. Kobrak, K. Kotera, J. Ladue, A. LedovskoyP. L. McBride, E. Monnier, H. Nguyen, R. Niclasen, E. J. Ramberg, R. E. Ray, M. Ronquest, J. Shields, W. Slater, D. Smith, N. Solomey, E. C. Swallow, P. A. Toale, R. Tschirhart, Y. W. Wah, J. Wang, H. B. White, J. Whitmore, M. J. Wilking, R. Winston, E. T. Worcester, T. Yamanaka, E. D. Zimmerman

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Abstract

The E799-II (KTeV) experiment at Fermilab has collected 83262 KL→e+e-γ(γ) events above a background of 79 events. We measure a decay width, normalized to the KL→π0π0πD0 (π0→γ γ, π0→γγ, πD0→e+e-γ(γ)) decay width, of Γ(KL→e+e-γ(γ))/ Γ(KL→π0π0πD0)=(1.3302±0.0046stat±0.0102syst) ×10-3. We also measure parameters of two KLγ*γ form factor models. In the Bergström-Massó-Singer parametrization, we find CαK*=-0.517±0.030stat±0.022syst. We separately fit for the first parameter of the D'Ambrosio-Isidori-Portolés model and find αDIP=-1.729±0.043stat±0.028syst.

Original language	English (US)
Article number	051804
Journal	Physical review letters
Volume	99
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevLett.99.051804
State	Published - Aug 3 2007
Externally published	Yes

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10.1103/PhysRevLett.99.051804

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Abouzaid, E., Arenton, M., Barker, A. R., Bellantoni, L., Blucher, E., Bock, G. J., Cheu, E., Coleman, R., Corcoran, M. D., Cox, B., Erwin, A. R., Glazov, A., Golossanov, A., Hsiung, Y. B., Jensen, D. A., Kessler, R., Kobrak, H. G. E., Kotera, K., Ladue, J., ... Zimmerman, E. D. (2007). Measurements of the decay KL→e+e-γ. Physical review letters, 99(5), Article 051804. https://doi.org/10.1103/PhysRevLett.99.051804

Abouzaid, E, Arenton, M, Barker, AR, Bellantoni, L, Blucher, E, Bock, GJ, Cheu, E, Coleman, R, Corcoran, MD, Cox, B, Erwin, AR, Glazov, A, Golossanov, A, Hsiung, YB, Jensen, DA, Kessler, R, Kobrak, HGE, Kotera, K, Ladue, J, Ledovskoy, A, McBride, PL, Monnier, E, Nguyen, H, Niclasen, R, Ramberg, EJ, Ray, RE, Ronquest, M, Shields, J, Slater, W, Smith, D, Solomey, N, Swallow, EC, Toale, PA, Tschirhart, R, Wah, YW, Wang, J, White, HB, Whitmore, J, Wilking, MJ, Winston, R, Worcester, ET, Yamanaka, T & Zimmerman, ED 2007, 'Measurements of the decay KL→e+e-γ', Physical review letters, vol. 99, no. 5, 051804. https://doi.org/10.1103/PhysRevLett.99.051804

@article{aa06ce76f1384c92bb5033bed54005ae,

title = "Measurements of the decay KL→e+e-γ",

abstract = "The E799-II (KTeV) experiment at Fermilab has collected 83262 KL→e+e-γ(γ) events above a background of 79 events. We measure a decay width, normalized to the KL→π0π0πD0 (π0→γ γ, π0→γγ, πD0→e+e-γ(γ)) decay width, of Γ(KL→e+e-γ(γ))/ Γ(KL→π0π0πD0)=(1.3302±0.0046stat±0.0102syst) ×10-3. We also measure parameters of two KLγ*γ form factor models. In the Bergstr{\"o}m-Mass{\'o}-Singer parametrization, we find CαK*=-0.517±0.030stat±0.022syst. We separately fit for the first parameter of the D'Ambrosio-Isidori-Portol{\'e}s model and find αDIP=-1.729±0.043stat±0.028syst.",

author = "E. Abouzaid and M. Arenton and Barker, {A. R.} and L. Bellantoni and E. Blucher and Bock, {G. J.} and E. Cheu and R. Coleman and Corcoran, {M. D.} and B. Cox and Erwin, {A. R.} and A. Glazov and A. Golossanov and Hsiung, {Y. B.} and Jensen, {D. A.} and R. Kessler and Kobrak, {H. G.E.} and K. Kotera and J. Ladue and A. Ledovskoy and McBride, {P. L.} and E. Monnier and H. Nguyen and R. Niclasen and Ramberg, {E. J.} and Ray, {R. E.} and M. Ronquest and J. Shields and W. Slater and D. Smith and N. Solomey and Swallow, {E. C.} and Toale, {P. A.} and R. Tschirhart and Wah, {Y. W.} and J. Wang and White, {H. B.} and J. Whitmore and Wilking, {M. J.} and R. Winston and Worcester, {E. T.} and T. Yamanaka and Zimmerman, {E. D.}",

year = "2007",

month = aug,

day = "3",

doi = "10.1103/PhysRevLett.99.051804",

language = "English (US)",

volume = "99",

journal = "Physical review letters",

issn = "0031-9007",

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number = "5",

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TY - JOUR

T1 - Measurements of the decay KL→e+e-γ

AU - Abouzaid, E.

AU - Arenton, M.

AU - Barker, A. R.

AU - Bellantoni, L.

AU - Blucher, E.

AU - Bock, G. J.

AU - Cheu, E.

AU - Coleman, R.

AU - Corcoran, M. D.

AU - Cox, B.

AU - Erwin, A. R.

AU - Glazov, A.

AU - Golossanov, A.

AU - Hsiung, Y. B.

AU - Jensen, D. A.

AU - Kessler, R.

AU - Kobrak, H. G.E.

AU - Kotera, K.

AU - Ladue, J.

AU - Ledovskoy, A.

AU - McBride, P. L.

AU - Monnier, E.

AU - Nguyen, H.

AU - Niclasen, R.

AU - Ramberg, E. J.

AU - Ray, R. E.

AU - Ronquest, M.

AU - Shields, J.

AU - Slater, W.

AU - Smith, D.

AU - Solomey, N.

AU - Swallow, E. C.

AU - Toale, P. A.

AU - Tschirhart, R.

AU - Wah, Y. W.

AU - Wang, J.

AU - White, H. B.

AU - Whitmore, J.

AU - Wilking, M. J.

AU - Winston, R.

AU - Worcester, E. T.

AU - Yamanaka, T.

AU - Zimmerman, E. D.

PY - 2007/8/3

Y1 - 2007/8/3

N2 - The E799-II (KTeV) experiment at Fermilab has collected 83262 KL→e+e-γ(γ) events above a background of 79 events. We measure a decay width, normalized to the KL→π0π0πD0 (π0→γ γ, π0→γγ, πD0→e+e-γ(γ)) decay width, of Γ(KL→e+e-γ(γ))/ Γ(KL→π0π0πD0)=(1.3302±0.0046stat±0.0102syst) ×10-3. We also measure parameters of two KLγ*γ form factor models. In the Bergström-Massó-Singer parametrization, we find CαK*=-0.517±0.030stat±0.022syst. We separately fit for the first parameter of the D'Ambrosio-Isidori-Portolés model and find αDIP=-1.729±0.043stat±0.028syst.

AB - The E799-II (KTeV) experiment at Fermilab has collected 83262 KL→e+e-γ(γ) events above a background of 79 events. We measure a decay width, normalized to the KL→π0π0πD0 (π0→γ γ, π0→γγ, πD0→e+e-γ(γ)) decay width, of Γ(KL→e+e-γ(γ))/ Γ(KL→π0π0πD0)=(1.3302±0.0046stat±0.0102syst) ×10-3. We also measure parameters of two KLγ*γ form factor models. In the Bergström-Massó-Singer parametrization, we find CαK*=-0.517±0.030stat±0.022syst. We separately fit for the first parameter of the D'Ambrosio-Isidori-Portolés model and find αDIP=-1.729±0.043stat±0.028syst.

UR - http://www.scopus.com/inward/record.url?scp=34547679501&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34547679501&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.99.051804

DO - 10.1103/PhysRevLett.99.051804

M3 - Article

AN - SCOPUS:34547679501

SN - 0031-9007

VL - 99

JO - Physical review letters

JF - Physical review letters

IS - 5

M1 - 051804

ER -

Measurements of the decay KL→e+e-γ

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