B¯→K*γfromD→K*l¯ν

of B + → τ + ν decays with hadronic B tags

Effect of H ± on B ± → τ ± ν τ and D ± s → μ ± ν μ , τ ± ν τ

The recent observation of the purely leptonic decay B → τντ at the B factories permits a sizeable contribution from a charged Higgs boson (H). Such a H would also contribute to the decays D s → μ νμ and D ± s → τ ντ , which are being measured with increasing precision at CLEO-c. We show that the branching ratios of D s → μ νμ and D s → τ ντ could be suppressed by up to 10% from the Standard Mod...

Fourth generation effects on the rare B → K ∗ ν¯ν decay

If the fourth generation fermions exist, the new quarks could influence the branching ratio of the rare B → K * ν ¯ ν decay. Two possible solutions of the fourth generation CKM factor (V * ´ ts V ´ tb) (±) are obtained as a function of the new´t-quark mass (m ´ t) from the experimental results of the B → X s γ together with the semileptonic decay B → X c ℓ¯ ν. The branching ratio of the decay B...

Measurement of the ratio of branching fractions B(B[over ¯]^{0}→D^{*+}τ^{-}ν[over ¯]_{τ})/B(B[over ¯]^{0}→D^{*+}μ^{-}ν[over ¯]_{μ}).

The branching fraction ratio R(D^{*})≡B(B[over ¯]^{0}→D^{*+}τ^{-}ν[over ¯]_{τ})/B(B[over ¯]^{0}→D^{*+}μ^{-}ν[over ¯]_{μ}) is measured using a sample of proton-proton collision data corresponding to 3.0  fb^{-1} of integrated luminosity recorded by the LHCb experiment during 2011 and 2012. The tau lepton is identified in the decay mode τ^{-}→μ^{-}ν[over ¯]_{μ}ν_{τ}. The semitauonic decay is sens...

Geometry of ν-Tamari lattices in types A and B

In this extended abstract, we exploit the combinatorics and geometry of triangulations of products of simplices to reinterpret and generalize a number of constructions in Catalan combinatorics. In our framework, the main role of “Catalan objects” is played by (I, J)-trees: bipartite trees associated to a pair (I, J) of finite index sets that stand in simple bijection with lattice paths weakly a...