CaltechAUTHORS
  A Caltech Library Service

Semileptonic B decays to excited charmed mesons

Leibovich, Adam K. and Ligeti, Zoltan and Stewart, Iain W. and Wise, Mark B. (1998) Semileptonic B decays to excited charmed mesons. Physical Review D, 57 (1). pp. 308-330. ISSN 0556-2821. http://resolver.caltech.edu/CaltechAUTHORS:LEIprd98a

[img]
Preview
PDF
See Usage Policy.

506Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:LEIprd98a

Abstract

Exclusive semileptonic B decays into excited charmed mesons are investigated at order ΛQCD/mQ in the heavy quark effective theory. Differential decay rates for each helicity state of the four lightest excited D mesons (D1, D2*, D0*, and D1*) are examined. At zero recoil, ΛQCD/mQ corrections to the matrix elements of the weak currents can be written in terms of the leading Isgur-Wise functions for the corresponding transition and meson mass splittings. A model independent prediction is found for the slope parameter of the decay rate into helicity zero D1 at zero recoil. The differential decay rates are predicted, including ΛQCD/mQ corrections with some model dependence away from zero recoil and including order αs corrections. Ratios of various exclusive branching ratios are computed. Matrix elements of the weak currents between B mesons and other excited charmed mesons are discussed at zero recoil to order ΛQCD/mQ. These amplitudes vanish at leading order, and can be written at order ΛQCD/mQ in terms of local matrix elements. Applications to B decay sum rules and factorization are presented.


Item Type:Article
Additional Information:© 1998 by The American Physical Society. Received 30 May 1997; published 21 November 1997. We thank A. Le Yaouanc, M. Neubert, and A. Vainshtein for useful discussions, and A. Falk for keeping us from being disingenuous. This work was supported in part by the Department of Energy under grant no. DE-FG03-92-ER 40701.
Subject Keywords:QUARK EFFECTIVE THEORY; EFFECTIVE FIELD-THEORY; P-WAVE MESONS; HEAVY-QUARK; FORM-FACTORS; SUM-RULES; LEADING ORDER; WEAK DECAYS; MODEL; QCD
Record Number:CaltechAUTHORS:LEIprd98a
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:LEIprd98a
Alternative URL:http://dx.doi.org/10.1103/PhysRevD.57.308
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10800
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:13 Jun 2008
Last Modified:26 Dec 2012 10:05

Repository Staff Only: item control page