1. Introduction

All results and input files are available at http://www.slac.stanford.edu/xorg/hfag/semi/lp05/lp05.shtml

In the following (in no particular order), the updates for lepton-photon 2005 with respect to winter conferences 2005 are discussed.

The updates focus on two areas: measurements of exclusive charmless semileptonic B decays (in particular B -> pi l nu) and measurements of inclusive charmless semileptonic decays and the determination of |Vub|.

Some of the error breakdowns can be found in http://www.slac.stanford.edu/xorg/hfag/semi/lp05/lp05.xls spreadsheet. This has been updated only for inclusive and exclusive |Vub|.

2. Changes to common parameters

The parameters used are listed in common.param; see the relevant (non-semileptonic) HFAG web pages for how they were determined.

3. Average of |Vub| from inclusive measurements on Upsilon(4S)

This determination has changed substantially in the past year. Recent theoretical developments include radiative corrections to the leading shape function, studies of sub-leading shape functions, and the development of a new "generator", i.e. a calculation valid over the full b -> u l nu decay phase space (see hep-ph/0504071). It is also widely accepted now that heavy quark (HQ) parameters determined other processes, e.g. moments from b -> c l nu semileptonic decays, can be used to constrain moments of the leading shape function. As the best method for determining the HQ parameters is still a subject for discussion, |Vub| is determined using several choices for the HQ parameters.

4. B -> pi l nu measurements

Several new measurements are available, some with partial rates in bins of q^2. The most precise measurements are still the untagged (i.e. neutrino reconstruction) variety, but the average of the B-tagged measurements is becoming competitive for the total branching fraction. The determination of |Vub| from these measurements is still evolving; at present we use only the partial BF for q2>16 along with unquenched lattice QCD calculations

5. Conclusion

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