Measurements of semileptonic [Formula Presented] 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. HanagakiY. 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

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Abstract

We present new measurements of [Formula Presented] semileptonic form factors using data collected in 1997 by the KTeV (E832) experiment at Fermilab. The measurements are based on [Formula Presented] [Formula Presented] and [Formula Presented] [Formula Presented] decays. For [Formula Presented], we measure both a linear and quadratic term: [Formula Presented] and [Formula Presented]. For [Formula Presented], we find [Formula Presented]. These form factors are consistent with [Formula Presented] 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, [Formula Presented] and [Formula Presented], where errors include uncertainties arising from the form factor parametrizations.

Original languageEnglish (US)
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume70
Issue number9
DOIs
StatePublished - Jan 1 2004

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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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 [Formula Presented] decay form factors. Physical Review D - Particles, Fields, Gravitation and Cosmology, 70(9). https://doi.org/10.1103/PhysRevD.70.092007