Observation of charmless hadronic B decays

Buskulic, D.; De Bonis, I.; Decamp, D.; Ghez, Philippe; Goy, C.; Lees, J.-P.; Lucotte, A.; Minard, M.-N.; Nief, J.-Y.; Odier, P.

doi:10.1016/0370-2693(96)00929-X

Observation of charmless hadronic B decays

ALEPH

Collaboration

Jul, 1996

10 pages

Published in:

Phys.Lett.B 384 (1996) 471-480,
Phys.Lett.B 384 (1996) 471-480

Published: Feb 12, 1999

DOI:

10.1016/0370-2693(96)00929-X (publication)

PDG:

{{\mathit \Lambda}_{{{b}}}^{0}}

\rightarrow

{{\mathit p}}{{\mathit K}^{-}}

Report number:

CERN-PPE-96-104

Experiments:

CERN-LEP-ALEPH

View in:

CERN Document Server

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Abstract: (Elsevier B.V.)

Four candidates for charmless hadronic B decay are observed in a data sample of four million hadronic Z decays recorded by the aleph detector at lep. The probability that these events come from background sources is estimated to be less than 10⁻⁶. The average branching ratio of weakly decaying B hadrons (a mixture of Bd⁰, Bs⁰ and Λb weighted by their production cross sections and lifetimes, here denoted B) into two long-lived charged hadrons (pions, kaons or protons) is measured to be Br(B → h⁺h⁻) = (1.7−0.7^+1.0 ± 0.2) × 10⁻⁵. The relative branching fraction

Br(B d(s)

⁰ → π⁺π⁻(K⁻))Br(Bd(s)⁰ → h⁺h⁻) is measured to be 1.0−0.3 −0.1^{+0.0 +0.0}. In addition, branching ratio upper limits are obtained for a variety of exclusive charmless hadronic two-body decays of B hadrons.

electron positron: colliding beams
electron positron: annihilation
Z0: electroproduction
Z0: hadronic decay
bottom
quark: pair production
bottom particle: hadronic decay
bottom particle: branching ratio
final state: (0charmed particle)
B0: branching ratio

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