Measurements of semileptonic KL decay form factors

T. Alexopoulos; M. Arenton; R. F. Barbosa; A. R. Barker; L. Bellantoni; A. Bellavance; E. Blucher; G. J. Bock; E. Cheu; S. Childress; R. Coleman; M. D. Corcoran; B. Cox; A. R. Erwin; R. Ford; A. Glazov; A. Golossanov; J. Graham; J. Hamm; K. Hanagaki; Y. B. Hsiung; H. Huang; V. Jejer; D. A. Jensen; R. Kessler; H. G.E. Kobrak; K. Kotera; J. LaDue; A. Ledovskoy; P. L. McBride; E. Monnier; K. S. Nelson; H. Nguyen; R. Niclasen; V. Prasad; X. R. Qi; E. J. Ramberg; R. E. Ray; M. Ronquest; E. Santos; P. Shanahan; J. Shields; W. Slater; D. Smith; N. Solomey; E. C. Swallow; R. J. Tesarek; P. A. Toale; R. Tschirhart; Y. W. Wah; J. Wang; H. B. White; J. Whitmore; M. Wilking; B. Winstein; R. Winston; E. T. Worcester; T. Yamanaka; E. D. Zimmerman

doi:10.1103/PhysRevD.70.092007

Measurements of semileptonic K_L decay form factors

T. Alexopoulos
, M. Arenton
, R. F. Barbosa
, A. R. Barker
, L. Bellantoni
, A. Bellavance
, E. Blucher
, G. J. Bock
, E. Cheu
, S. Childress
, R. Coleman
, M. D. Corcoran
, B. Cox
, A. R. Erwin
, R. Ford
, A. Glazov
, A. Golossanov
, J. Graham
, J. Hamm
, K. Hanagaki

Y. B. Hsiung, H. Huang, V. Jejer, D. A. Jensen, R. Kessler, H. G.E. Kobrak, K. Kotera, J. LaDue, A. Ledovskoy, P. L. McBride, E. Monnier, K. S. Nelson, H. Nguyen, R. Niclasen, V. Prasad, X. R. Qi, E. J. Ramberg, R. E. Ray, M. Ronquest, E. Santos, P. Shanahan, J. Shields, W. Slater, D. Smith, N. Solomey, E. C. Swallow, R. J. Tesarek, P. A. Toale, R. Tschirhart, Y. W. Wah, J. Wang, H. B. White, J. Whitmore, M. Wilking, B. Winstein, R. Winston, E. T. Worcester, T. Yamanaka, E. D. Zimmerman

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

109 Scopus citations

Abstract

We present new measurements of K_L semileptonic form factors using data collected in 1997 by the KTeV (E832) experiment at Fermilab. The measurements are based on 1.9 × 10⁶ K_L → π^±e^∓ν and 1.5 × 10⁶ K_L → π^±μ^∓ν decays. For f₊(t), we measure both a linear and quadratic term: λ′₊ = (20.64 ± 1.75) × 10^-3 and λ″₊ = (3.20 ± 0.69) × 10^-3. For f₀(t), we find λ₀ = (13.72 ± 1.31) × 10^-3. These form factors are consistent with K^± form factors, suggesting that isospin symmetry breaking effects are small. We use our measured values of the form factors to evaluate the decay phase space integrals, I_K^e = 0.15350 ± 0.00105 and I _K^μ = 0.10165 ± 0.00080, where errors include uncertainties arising from the form factor parametrizations.

Original language	English (US)
Article number	092007
Pages (from-to)	092007-1-092007-15
Journal	Physical Review D
Volume	70
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevD.70.092007
State	Published - Nov 2004
Externally published	Yes

Bibliographical note

Funding Information:
We gratefully acknowledge the support and effort of the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported in part by the U.S. Department of Energy, The National Science Foundation, and The Ministry of Education and Science of Japan.

Publisher link

10.1103/PhysRevD.70.092007

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Alexopoulos, T., Arenton, M., Barbosa, R. F., Barker, A. R., Bellantoni, L., Bellavance, A., Blucher, E., Bock, G. J., Cheu, E., Childress, S., Coleman, R., Corcoran, M. D., Cox, B., Erwin, A. R., Ford, R., Glazov, A., Golossanov, A., Graham, J., Hamm, J., ... Zimmerman, E. D. (2004). Measurements of semileptonic K_L decay form factors. Physical Review D, 70(9), 092007-1-092007-15. Article 092007. https://doi.org/10.1103/PhysRevD.70.092007

Alexopoulos, T, Arenton, M, Barbosa, RF, Barker, AR, Bellantoni, L, Bellavance, A, Blucher, E, Bock, GJ, Cheu, E, Childress, S, Coleman, R, Corcoran, MD, Cox, B, Erwin, AR, Ford, R, Glazov, A, Golossanov, A, Graham, J, Hamm, J, Hanagaki, K, Hsiung, YB, Huang, H, Jejer, V, Jensen, DA, Kessler, R, Kobrak, HGE, Kotera, K, LaDue, J, Ledovskoy, A, McBride, PL, Monnier, E, Nelson, KS, Nguyen, H, Niclasen, R, Prasad, V, Qi, XR, Ramberg, EJ, Ray, RE, Ronquest, M, Santos, E, Shanahan, P, Shields, J, Slater, W, Smith, D, Solomey, N, Swallow, EC, Tesarek, RJ, Toale, PA, Tschirhart, R, Wah, YW, Wang, J, White, HB, Whitmore, J, Wilking, M, Winstein, B, Winston, R, Worcester, ET, Yamanaka, T & Zimmerman, ED 2004, 'Measurements of semileptonic K_L decay form factors', Physical Review D, vol. 70, no. 9, 092007, pp. 092007-1-092007-15. https://doi.org/10.1103/PhysRevD.70.092007

@article{7913553c911f4375a66925eb485d2711,

title = "Measurements of semileptonic KL decay form factors",

abstract = "We present new measurements of KL semileptonic form factors using data collected in 1997 by the KTeV (E832) experiment at Fermilab. The measurements are based on 1.9 × 106 KL → π±e∓ν and 1.5 × 106 KL → π±μ∓ν decays. For f+(t), we measure both a linear and quadratic term: λ′+ = (20.64 ± 1.75) × 10-3 and λ″+ = (3.20 ± 0.69) × 10-3. For f0(t), we find λ0 = (13.72 ± 1.31) × 10-3. These form factors are consistent with K± form factors, suggesting that isospin symmetry breaking effects are small. We use our measured values of the form factors to evaluate the decay phase space integrals, IKe = 0.15350 ± 0.00105 and I Kμ = 0.10165 ± 0.00080, where errors include uncertainties arising from the form factor parametrizations.",

author = "T. Alexopoulos and M. Arenton and Barbosa, \{R. F.\} and Barker, \{A. R.\} and L. Bellantoni and A. Bellavance and E. Blucher and Bock, \{G. J.\} and E. Cheu and S. Childress and R. Coleman and Corcoran, \{M. D.\} and B. Cox and Erwin, \{A. R.\} and R. Ford and A. Glazov and A. Golossanov and J. Graham and J. Hamm and K. Hanagaki and Hsiung, \{Y. B.\} and H. Huang and V. Jejer 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 Nelson, \{K. S.\} and H. Nguyen and R. Niclasen and V. Prasad and Qi, \{X. R.\} and Ramberg, \{E. J.\} and Ray, \{R. E.\} and M. Ronquest and E. Santos and P. Shanahan and J. Shields and W. Slater and D. Smith and N. Solomey and Swallow, \{E. C.\} and Tesarek, \{R. J.\} and Toale, \{P. A.\} and R. Tschirhart and Wah, \{Y. W.\} and J. Wang and White, \{H. B.\} and J. Whitmore and M. Wilking and B. Winstein and R. Winston and Worcester, \{E. T.\} and T. Yamanaka and Zimmerman, \{E. D.\}",

note = "Funding Information: We gratefully acknowledge the support and effort of the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported in part by the U.S. Department of Energy, The National Science Foundation, and The Ministry of Education and Science of Japan.",

year = "2004",

month = nov,

doi = "10.1103/PhysRevD.70.092007",

language = "English (US)",

volume = "70",

pages = "092007--1--092007--15",

journal = "Physical Review D",

issn = "0556-2821",

number = "9",

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TY - JOUR

T1 - Measurements of semileptonic KL decay form factors

AU - Alexopoulos, T.

AU - Arenton, M.

AU - Barbosa, R. F.

AU - Barker, A. R.

AU - Bellantoni, L.

AU - Bellavance, A.

AU - Blucher, E.

AU - Bock, G. J.

AU - Cheu, E.

AU - Childress, S.

AU - Coleman, R.

AU - Corcoran, M. D.

AU - Cox, B.

AU - Erwin, A. R.

AU - Ford, R.

AU - Glazov, A.

AU - Golossanov, A.

AU - Graham, J.

AU - Hamm, J.

AU - Hanagaki, K.

AU - Hsiung, Y. B.

AU - Huang, H.

AU - Jejer, V.

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 - Nelson, K. S.

AU - Nguyen, H.

AU - Niclasen, R.

AU - Prasad, V.

AU - Qi, X. R.

AU - Ramberg, E. J.

AU - Ray, R. E.

AU - Ronquest, M.

AU - Santos, E.

AU - Shanahan, P.

AU - Shields, J.

AU - Slater, W.

AU - Smith, D.

AU - Solomey, N.

AU - Swallow, E. C.

AU - Tesarek, R. J.

AU - Toale, P. A.

AU - Tschirhart, R.

AU - Wah, Y. W.

AU - Wang, J.

AU - White, H. B.

AU - Whitmore, J.

AU - Wilking, M.

AU - Winstein, B.

AU - Winston, R.

AU - Worcester, E. T.

AU - Yamanaka, T.

AU - Zimmerman, E. D.

N1 - Funding Information: We gratefully acknowledge the support and effort of the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported in part by the U.S. Department of Energy, The National Science Foundation, and The Ministry of Education and Science of Japan.

PY - 2004/11

Y1 - 2004/11

N2 - We present new measurements of KL semileptonic form factors using data collected in 1997 by the KTeV (E832) experiment at Fermilab. The measurements are based on 1.9 × 106 KL → π±e∓ν and 1.5 × 106 KL → π±μ∓ν decays. For f+(t), we measure both a linear and quadratic term: λ′+ = (20.64 ± 1.75) × 10-3 and λ″+ = (3.20 ± 0.69) × 10-3. For f0(t), we find λ0 = (13.72 ± 1.31) × 10-3. These form factors are consistent with K± form factors, suggesting that isospin symmetry breaking effects are small. We use our measured values of the form factors to evaluate the decay phase space integrals, IKe = 0.15350 ± 0.00105 and I Kμ = 0.10165 ± 0.00080, where errors include uncertainties arising from the form factor parametrizations.

AB - We present new measurements of KL semileptonic form factors using data collected in 1997 by the KTeV (E832) experiment at Fermilab. The measurements are based on 1.9 × 106 KL → π±e∓ν and 1.5 × 106 KL → π±μ∓ν decays. For f+(t), we measure both a linear and quadratic term: λ′+ = (20.64 ± 1.75) × 10-3 and λ″+ = (3.20 ± 0.69) × 10-3. For f0(t), we find λ0 = (13.72 ± 1.31) × 10-3. These form factors are consistent with K± form factors, suggesting that isospin symmetry breaking effects are small. We use our measured values of the form factors to evaluate the decay phase space integrals, IKe = 0.15350 ± 0.00105 and I Kμ = 0.10165 ± 0.00080, where errors include uncertainties arising from the form factor parametrizations.

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UR - https://www.scopus.com/pages/publications/19944434197#tab=citedBy

U2 - 10.1103/PhysRevD.70.092007

DO - 10.1103/PhysRevD.70.092007

M3 - Article

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SN - 0556-2821

VL - 70

SP - 092007-1-092007-15

JO - Physical Review D

JF - Physical Review D

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