First measurement of time-dependent $C\!P$ violation in $B^0_s \to K^+K^-$ decays - INSPIRE

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First measurement of time-dependent $C\!P$ violation in $B^0_s \to K^+K^-$ decays

LHCb

Collaboration

•

R Aaij
(
- NIKHEF, Amsterdam
)

Aug 6, 2013

26 pages

Published in:

JHEP 10 (2013) 183

Published: Oct, 2013

e-Print:

1308.1428 [hep-ex]

DOI:

10.1007/JHEP10(2013)183

PDG:

\mathit C_{{{\mathit \pi}} {{\mathit \pi}} }

{{\mathit B}^{0}}

\rightarrow

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

Report number:

CERN-PH-EP-2013-144,
LHCB-PAPER-2013-040

Experiments:

CERN-LHC-LHCb

View in:

reference search82 citations

Citations per year

Abstract: (arXiv)

Direct and mixing-induced

C\!P

-violating asymmetries in

B^0_s \to K^+K^-

decays are measured for the first time using a data sample of

pp

collisions, corresponding to an integrated luminosity of

1.0~\mathrm{fb}^{-1}

, collected with the LHCb detector at a centre-of-mass energy of

7~\mathrm{TeV}

. The results are

C_{KK} = 0.14 \pm 0.11 \pm 0.03

and

S_{KK} = 0.30 \pm 0.12 \pm 0.04

, where the first uncertainties are statistical and the second systematic. The corresponding quantities are also determined for

B^0 \to \pi^+\pi^-

decays to be

C_{\pi\pi} = -0.38 \pm 0.15 \pm 0.02

and

S_{\pi\pi} = -0.71 \pm 0.13 \pm 0.02

, in good agreement with existing measurements.

Note:

22 pages, 8 figures, 4 tables, v2 with minor changes after journal review

CP violation
B physics
Flavor physics
CKM angle gamma
Hadron-Hadron Scattering
CP: violation
asymmetry: CP: time dependence
p p: scattering
LHC-B
B/s0: hadronic decay

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