Measurement of theB→D¯(*)D(*)Kbra

Abstract

We present a measurement of the branching fractions of the 22 decay channels of the B 0 and B + mesons to D ( * ) D ( * ) K, where the D ( * ) and D ( * ) mesons are fully reconstructed. Summing the 10 neutral modes and the 12 charged modes, the branching fractions are found to be B(B 0 → D ( * ) D ( * ) K) = (3.68 ± 0.10 ± 0.24)% and B(B + → D ( * ) D ( * ) K) = (4.05 ± 0.11 ± 0.28)%, where the first uncertainties are statistical and the second systematic. The results are based on 429 fb −1 of data containing 471 × 10 6 BB pairs collected at the Υ (4S) resonance with the BABAR detector at the SLAC National Accelerator Laboratory.

Triangle singularity appearing as an X(3872) -like peak in B→(J/ψπNakamura1 2020Phys. Rev. D18180View full textAdd to dashboardCite

“…2. After fixing the W dependence, we can determine the B 0 → D Ã− D Ã0 K þ vertex strength using data for the branching ratio: [58]. Since the triangle diagrams in Fig.…”

First observation of the decay B0→D0D¯<

“…Although measurements involving B → D ðÃÞDðÃÞ K decays have been performed by the ALEPH, BABAR, Belle and LHCb collaborations [17][18][19][20][21][22], no measurements involving B → D ðÃÞDðÃÞ Kπ transitions have been performed to date. The B 0 → D 0D0 K þ π − branching fraction, based on considerations of similar decay modes, is expected to be Oð10 −4 Þ, but the product of the branching fractions including the D 0 → K − π þ charm meson decays is much smaller, at the level of Oð10 −7 Þ.…”

“…This measurement uses the full kinematically allowed range of B 0 → D 0D0 K þ π − outside of the D Ã− region, including the entire K þ π − mass range, encompassing the K Ã ð892Þ 0 resonance and the broad K þ π − S-wave. The most precise measurement of the branching fraction of [21]. Substituting in this value gives…”

Charge asymmetry in decays B → $$ D\overline{D}K $$

“…Res /W +− tot of this decay probabilities in the vicinity of Ψ(3770) resonance, see table 1, then we use the results of Babar [15], W +− tot = (2.2 ± 0.5 ± 0.5) • 10 −4 , the result of LHCb (table 1)…”