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Improved Measurement of [Formula presented] Using [Formula presented] Decays

  • R. A. Briere
  • , G. P. Chen
  • , T. Ferguson
  • , G. Tatishvili
  • , H. Vogel
  • , N. E. Adam
  • , J. P. Alexander
  • , C. Bebek
  • , B. E. Berger
  • , K. Berkelman
  • , F. Blanc
  • , V. Boisvert
  • , D. G. Cassel
  • , P. S. Drell
  • , J. E. Duboscq
  • , K. M. Ecklund
  • , R. Ehrlich
  • , L. Gibbons
  • , B. Gittelman
  • , S. W. Gray
  • D. L. Hartill, B. K. Heltsley, L. Hsu, C. D. Jones, J. Kandaswamy, D. L. Kreinick, A. Magerkurth, H. Mahlke-Krüger, T. O. Meyer, N. B. Mistry, E. Nordberg, M. Palmer, J. R. Patterson, D. Peterson, J. Pivarski, D. Riley, A. J. Sadoff, H. Schwarthoff, M. R. Shepherd, J. G. Thayer, D. Urner, B. Valant-Spaight, G. Viehhauser, A. Warburton, M. Weinberger, S. B. Athar, P. Avery, Y. Kubota, R. Poling, D. Cronin-Hennessy

Research output: Contribution to journalArticlepeer-review

Abstract

We determine the weak coupling [Formula presented] between the [Formula presented] and [Formula presented] quarks using a sample of [Formula presented] [Formula presented] events in the CLEO detector at the Cornell Electron Storage Ring. We determine the yield of reconstructed [Formula presented] decays as a function of [Formula presented], the boost of the [Formula presented] in the [Formula presented] rest frame, and from this we obtain the differential decay rate [Formula presented]. By extrapolating [Formula presented] to [Formula presented], the kinematic end point at which the [Formula presented] is at rest relative to the [Formula presented], we extract the product [Formula presented], where [Formula presented] is the form factor at [Formula presented]. Combined with theoretical results for [Formula presented] we determine [Formula presented].

Original languageEnglish (US)
JournalPhysical review letters
Volume89
Issue number8
DOIs
StatePublished - 2002

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