ΥB̄B COUPLINGS, SLOPE OF THE ISGUR-WISE FUNCTION AND IMPROVED ESTIMATE OF Vcb

  • S. Narison
  • Published 2008

Abstract

We estimate the sum of the ΥB̄B couplings using QCD Spectral Sum Rules (QSSR). Our result implies the phenomenological bound ξ(vv = 1) ≥ −1.04 for the slope of the Isgur-Wise function. An analytic estimate of the (physical) slope to two loops within QSSR leads to the accurate value ξ(vv = 1) ≃ −(1.00 ± 0.02) due to the (almost) complete cancellations… (More)

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Cite this paper

@inproceedings{Narison2008BBCS, title={ΥB̄B COUPLINGS, SLOPE OF THE ISGUR-WISE FUNCTION AND IMPROVED ESTIMATE OF Vcb}, author={S. Narison}, year={2008} }