Measurement of the CP violating phase $\phi_s$ in $\bar{B}^0_s \to J/\psi f_0(980)$ - INSPIRE

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Measurement of the CP violating phase $\phi_s$ in $\bar{B}^0_s \to J/\psi f_0(980)$

LHCb

Collaboration

Dec, 2011

9 pages

Published in:

Phys.Lett.B 707 (2012) 497-505

Published: Jul 16, 2013

e-Print:

1112.3056 [hep-ex]

DOI:

10.1016/j.physletb.2012.01.017

PDG:

\mathit CP

Violation phase

\beta _{s}

{{\mathit b}}

\rightarrow

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

Report number:

CERN-PH-EP-2011-205,
LHCB-PAPER-2011-031

Experiments:

CERN-LHC-LHCb

View in:

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Abstract: (Elsevier)

Measurement of mixing-induced CP violation in B¯s0 decays is of prime importance in probing new physics. So far only the channel B¯s0→J/ψϕ has been used. Here we report on a measurement using an LHCb data sample of 0.41 fb −1 , in the CP odd eigenstate J/ψf0(980) , where f0(980)→π+π− . A time-dependent fit of the data with the B¯s0 lifetime and the difference in widths of the heavy and light eigenstates constrained to the values obtained from B¯s0→J/ψϕ yields a value of the CP violating phase of −0.44±0.44±0.02 rad , consistent with the Standard Model expectation.

Note:

15 pages 8 figures/ 525 additional authors not shown

11.30.Er
13.25.Hw
14.40.Nd
LHC
CP violation
Hadronic B decays
B macron s 0 meson
B¯s0 meson
[formula omitted] meson
CP: violation

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