CDF has observed two new decays of the B

_{s}meson that are both Cabbibo and colour suppressed, namely B

_{s}--> J/ψ K

^{*}and B

_{s}--> J/ψ K

_{S}, with a significance of over 7σ.

BELLE has observed charmless B

_{s}decays B

_{s}--> K

^{+}K

_{s}--> Kπ or B

_{s}--> ππ decays. They have also observed B

_{s}--> D

_{s}

^{*}π, B

_{s}--> D

_{s}

^{*}ρ, and B

_{s}--> D

_{s}ρ decays.

Nicolas Garron spoke about the determination of the bottom quark mass and the B

_{s}decay constant in nonperturbative Heavy Quark Effective Theory (HQET) on the lattice. This approach is based on a fully nonperturbative lattice formulation of HQET, the effective theory obtained by expanding QCD in powers of the inverse heavy quark mass. Using this formulation, one can nonperturbatively match HQET to QCD on a very fine (and hence necessarily very small) lattice and thus determine the HQET couplings, which then can be extended to larger lattices and be used to make predictions. The results presented were still for quenched (i.e. N

_{f}=0) QCD, but the calculation of N

_{f}=2 results is far advanced.

The poster session took place in the evening. Since I had a poster to present myself, I didn't really get to discuss any posters with their presenters. At the reception afterwards, the food was very nice, but was hard to obtain because the density of physicists approached a singularity near the plates.

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