Measurement of branching fractions and polarization in B ---> phi K(*) decays - INSPIRE

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Measurement of branching fractions and polarization in B ---> phi K(*) decays

Belle

Collaboration

•

K.F. Chen
(
- Taiwan, Natl. Taiwan U.
)

Jul, 2003

9 pages

Published in:

Phys.Rev.Lett. 91 (2003) 201801

e-Print:

hep-ex/0307014 [hep-ex]

DOI:

10.1103/PhysRevLett.91.201801

PDG:

{{\mathit B}^{+}}

\rightarrow

{{\mathit K}^{*}{(892)}^{+}}{{\mathit \phi}}

Experiments:

KEK-BF-BELLE

View in:

ADS Abstract Service

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Abstract:

We present the first measurement of decay amplitudes in B -> phi K^* and measurements of branching fractions in B -> phi K^{(*)} decays based on 78.1 fb^{-1} of data recorded at the Upsilon(4S) resonance with the Belle detector at the KEKB e^+ e^- storage ring. The decay amplitudes for the different phi K^{*0} helicity states are measured from the angular distributions of final state particles in the transversity basis. The longitudinal and transverse complex amplitudes are |A_0|^2 = 0.43 +- 0.09 +- 0.04, |A_perp|^2 = 0.41 +- 0.10 +- 0.04, arg(A_parallel) = -2.57 +- 0.39 +- 0.09, and arg(A_perp) = 0.48 +- 0.32 +- 0.06. The direct CP-violating asymmetries are found to be consistent with zero.

electron positron: colliding beams
electron positron: annihilation
Upsilon(10570): electroproduction
B: pair production
B: hadronic decay
Phi(1020)
K*(892)
B: branching ratio
polarization
amplitude analysis

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