Semileptonic Λb decay to excited Λc baryons at order ΛQCD/mQ
Creators
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1.
California Institute of Technology
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2.
Carnegie Mellon University
Abstract
Exclusive semileptonic Λb decays to excited charmed Λc baryons are investigated at order ΛQCD/mQ in the heavy quark effective theory. The differential decay rates are analyzed for the Jπ=1/2- Λc(2593) and the Jπ=3/2- Λc(2625). They receive 1/mc,b corrections at zero recoil that are determined by mass splittings and the leading order Isgur-Wise function. With some assumptions, we find that the branching fraction for Λb decays to these states is 2.5–3.3%. The decay rate to the helicity ±3/2 states, which vanishes for mQ→∞, remains small at order ΛQCD/mQ since 1/mc corrections do not contribute. Matrix elements of weak currents between a Λb and other excited Λc states are analyzed at zero-recoil to order ΛQCD/mQ. Applications to baryonic heavy quark sum rules are explored.
Additional Information
© 1998 by The American Physical Society. Received 10 November 1997; published 17 March 1998. We would like to thank Glenn Boyd, Martin Gremm, Zoltan Ligeti, Ira Rothstein, and Mark Wise for discussions. This work was supported in part by the Department of Energy under grant numbers DOE-ER-40682-138 and DE-FG03-92-ER 40701.Attached Files
Published - LEIprd98b.pdf
Files
LEIprd98b.pdf
Additional details
Identifiers
- Eprint ID
- 11483
- Resolver ID
- CaltechAUTHORS:LEIprd98b
Funding
- Department of Energy (DOE)
- DOE-ER-40682-138
- Department of Energy (DOE)
- DE-FG03-92-ER 40701
Dates
- Created
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2008-08-27Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field