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, Elliott C 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 & 39 others 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 journalArticle

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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±eν and 1.5 × 106 KL → π±μν 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.

Original languageEnglish (US)
Article number092007
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume70
Issue number9
DOIs
StatePublished - Nov 2004

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Form Factors
form factors
Decay
decay
phase-space integral
Symmetry Breaking
Parametrization
Phase Space
broken symmetry
Uncertainty
Evaluate
Term
Experiment

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics
  • Mathematical Physics

Cite this

Alexopoulos, T., Arenton, M., Barbosa, R. F., Barker, A. R., Bellantoni, L., Bellavance, A., ... Zimmerman, E. D. (2004). Measurements of semileptonic KL decay form factors. Physical Review D - Particles, Fields, Gravitation and Cosmology, 70(9), [092007]. https://doi.org/10.1103/PhysRevD.70.092007

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

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 70, No. 9, 092007, 11.2004.

Research output: Contribution to journalArticle

Alexopoulos, T, Arenton, M, Barbosa, RF, Barker, AR, Bellantoni, L, Bellavance, A, Blucher, E, Bock, GJ, Cheu, EC, 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 KL decay form factors', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 70, no. 9, 092007. https://doi.org/10.1103/PhysRevD.70.092007
Alexopoulos T, Arenton M, Barbosa RF, Barker AR, Bellantoni L, Bellavance A et al. Measurements of semileptonic KL decay form factors. Physical Review D - Particles, Fields, Gravitation and Cosmology. 2004 Nov;70(9). 092007. https://doi.org/10.1103/PhysRevD.70.092007
Alexopoulos, T. ; Arenton, M. ; Barbosa, R. F. ; Barker, A. R. ; Bellantoni, L. ; Bellavance, A. ; Blucher, E. ; Bock, G. J. ; Cheu, Elliott C ; Childress, S. ; Coleman, R. ; Corcoran, M. D. ; Cox, B. ; Erwin, A. R. ; Ford, R. ; Glazov, A. ; Golossanov, A. ; Graham, J. ; Hamm, J. ; Hanagaki, K. ; Hsiung, Y. B. ; Huang, H. ; Jejer, V. ; Jensen, D. A. ; Kessler, R. ; Kobrak, H. G E ; Kotera, K. ; LaDue, J. ; Ledovskoy, A. ; McBride, P. L. ; Monnier, E. ; Nelson, K. S. ; Nguyen, H. ; Niclasen, R. ; Prasad, V. ; Qi, X. R. ; Ramberg, E. J. ; Ray, R. E. ; Ronquest, M. ; Santos, E. ; Shanahan, P. ; Shields, J. ; Slater, W. ; Smith, D. ; Solomey, N. ; Swallow, E. C. ; Tesarek, R. J. ; Toale, P. A. ; Tschirhart, R. ; Wah, Y. W. ; Wang, J. ; White, H. B. ; Whitmore, J. ; Wilking, M. ; Winstein, B. ; Winston, R. ; Worcester, E. T. ; Yamanaka, T. ; Zimmerman, E. D. / Measurements of semileptonic KL decay form factors. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2004 ; Vol. 70, No. 9.
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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.",
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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, Elliott C

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.

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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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