Abstract
We measure the primary lepton momentum spectrum in [Formula Presented] decays, for [Formula Presented] in the B rest frame. From this, we calculate various moments of the spectrum. In particular, we find [Formula Presented] and [Formula Presented] We use these moments to determine non-perturbative parameters governing the semileptonic width. In particular, we extract the heavy quark expansion parameters [Formula Presented] and [Formula Presented] The theoretical constraints used are evaluated through order [Formula Presented] in the non-perturbative expansion and [Formula Presented] in the perturbative expansion. We use these parameters to extract [Formula Presented] from the world average of the semileptonic width and find [Formula Presented] In addition, we extract the short range b-quark mass [Formula Presented] Finally, we discuss the implications of our measurements for the theoretical understanding of inclusive semileptonic processes.
Original language | English (US) |
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Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
Volume | 67 |
Issue number | 7 |
DOIs | |
State | Published - 2003 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)