HFAG: Semileptonic B Decay Parameters

Program

determine the best values of the inclusive and exclusive semileptonic B decay branching ratios from the combined data.
determining the best possible values of F(1)|Vcb| and of the inclusive semileptonic B decay rate.
use a consistent approach for the moments.
- using consistent approaches in all the experiments based on the latest theoretical etc developments,
- checking consistency of results between the expts,
- evaluating the systematics common to all the expts,
- comparing the results of the different methods properly taking account of any common experimental systematics
trying if possible to understand their theoretical errors and how to control and minimise them in discussion with theorists.

Previous averages can be found on the webpages of the LEP VCB working group and the LEP VUB working group.

Date	Update Information	Remarks
PDG 2008	update common.param	Many new averages. Results used for the PDG2008
LP 2007	update common.param	Summer 2007 results
PDG 2007	update common.param	Results used for the PDG07
Summer 2006	update common.param	Preliminary
ICHEP 2006	update common.param	Preliminary
Winter 2006	update common.param	Preliminary
PDG 2006	update common.param	Preliminary
EPS 2005	update common.param	Preliminary
Lepton-Photon 2005	update common.param	Preliminary
Winter 2005	update common.param	Preliminary
PDG 2005	update common.param	Changes to some BF for PDG web update
Summer 2004 (Beijing)	update common.param	Many new Vub results, the averages are still preliminary!
Winter 2004	update common.param	No new results, but an inclusive Vub average. First version of written documentation
PDG 2004	update common.param	No substantial change with respect to PDG 2003
LP 2003	update common.param	New BABAR result on \|Vcb\| from B0->D*lnu
EPS 2003	update common.param	New CLEO inclusive semileptonic branching ratio
PDG 2003	update common.param	Changes to D*lnu by exclusion/supercession of old ARGUS and CLEO analyses
Winter 2003	update common.param	Updates from BABAR for D*lnu and BABAR/Belle for \|Vub\|
Summer 2002	update common.param	Migration to new presentation. Information identical to old webpages

Meeting minutes.
A long version of the PDG-2002 writeup for the averages of the inclusive semileptonic branching and determinations of |V_cb| has been released as a preprint.
The difficulties of averaging |V_ub| are documented in the PDG-2002 writeup. (There is no long version.)

Experiment	Contact Persons
BABAR	Francesca Di Lodovico David Lopes Pegna Vera Luth
BELLE	Elisabetta Barberio Christoph Schwanda Phillip Urquijo
CDF	Matthew Jones
CLEO	Marina Artuso

Further contributors: Oliver Buchmueller (CMS, former BABAR), Henning Flaecher (ATLAS, former BABAR), Bob Kowalewski (BABAR, former chair), Heiko Lacker (BABAR, former member), Art Snyder (BABAR)
We gratefully acknowledge the advise of: Jochen Dingfelder (BABAR), Antonio Limosani (Belle, former chair), Marcello Rotondo (BABAR).

You can send a mail to the entire group with the major-domo list hfag-semi@slac.stanford.edu

This page was last updated on 22 June 2008 by Francesca Di Lodovico.