Measurement of CP violation in $B_s^0 \to \phi \phi$ decays - INSPIRE

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Measurement of CP violation in $B_s^0 \to \phi \phi$ decays

LHCb

Collaboration

Jul 8, 2014

17 pages

Published in:

Phys.Rev.D 90 (2014) 5, 052011

Published: Sep 30, 2014

e-Print:

1407.2222 [hep-ex]

DOI:

10.1103/PhysRevD.90.052011

PDG:

\vert \lambda \vert

{{\mathit b}}

\rightarrow

{{\mathit c}}{{\overline{\mathit c}}}{{\mathit s}}

Report number:

CERN-PH-EP-2014-150,
LHCB-PAPER-2014-026

Experiments:

CERN-LHC-LHCb

View in:

reference search81 citations

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Abstract: (APS)

A measurement of the decay time-dependent CP-violating asymmetry in Bs0→ϕϕ decays is presented, along with measurements of the T-odd triple-product asymmetries. In this decay channel, the CP-violating weak phase arises from the interference between Bs0-B¯s0 mixing and the loop-induced decay amplitude. Using a sample of proton-proton collision data corresponding to an integrated luminosity of 3.0 fb-1 collected with the LHCb detector, a signal yield of approximately 4000 Bs0→ϕϕ decays is obtained. The CP-violating phase is measured to be ϕs=-0.17±0.15(stat)±0.03(syst) rad. The triple-product asymmetries are measured to be AU=-0.003±0.017(stat)±0.006(syst) and AV=-0.017±0.017(stat)±0.006(syst). Results are consistent with the hypothesis of CP conservation.

Note:

19 pages, 7 figures, updated to published version

13.25.Hw
11.30.Er
12.15.Hh
14.40.Nd
time dependence
CP: violation
p p: scattering
asymmetry
LHC-B
decay: amplitude analysis

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