Measurements of time-dependent CP asymmetries in $B \to D^{*\mp} \pi^{\pm}$ decays using a partial reconstruction technique - INSPIRE

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Measurements of time-dependent CP asymmetries in $B \to D^{*\mp} \pi^{\pm}$ decays using a partial reconstruction technique

Belle

Collaboration

Feb, 2011

8 pages

Published in:

Phys.Rev.D 84 (2011) 021101

e-Print:

1102.0888 [hep-ex]

DOI:

10.1103/PhysRevD.84.021101

PDG: (S

_{+}

+

_{-})/

{{\mathit B}^{0}}

\rightarrow

{{\mathit D}^{*-}}{{\mathit \pi}^{+}}

Report number:

BELLE-PREPRINT-2011-1,
KEK-PREPRINT-2010-49

Experiments:

KEK-BF-BELLE

View in:

reference search34 citations

Citations per year

Abstract: (arXiv)

We report results on time-dependent CP asymmetries in

B \to D^{*\mp}\pi^{\pm}

decays based on a data sample containing 657 {\times}

10^6

B\bar{B}

pairs collected with the Belle detector at the KEKB asymmetric-energy

e^+ e^-

collider at the

\Upsilon(4S)

resonance. We use a partial reconstruction technique, wherein signal

B \to D^{*\mp}\pi^{\pm}

events are identified using information only from the fast pion from the B decay and the slow pion from the subsequent decay of the

D^{*\mp}

, where the former (latter) corresponds to

D^{*+} (D^{*-})

final states. We obtain CP violation parameters

S^+ = +0.061 \pm 0.018(\mathrm{stat}) \pm 0.012(\mathrm{syst})

and

S^- = +0.031 \pm 0.019(\mathrm{stat}) \pm 0.015(\mathrm{syst})

.

Note:

8 pages, 5 figures, 2 tables, submitted to Physical Review D (RC)

11.30.Er
14.40.Nd
asymmetry: CP
B0: hadronic decay
CP: violation
asymmetry: time dependence
BELLE
KEK-B
electron positron: annihilation
B: pair production

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