Measurement of the time-dependent CP asymmetries in $B_s^0\rightarrow J/\psi K_{\rm S}^0$

Aaij, Roel; Adeva, Bernardo; Adinolfi, Marco; Affolder, Anthony; Ajaltouni, Ziad; Akar, Simon; Albrecht, Johannes; Alessio, Federico; Alexander, Michael; Ali, Suvayu

doi:10.1007/JHEP06(2015)131

Measurement of the time-dependent CP asymmetries in $B_s^0\rightarrow J/\psi K_{\rm S}^0$

LHCb

Collaboration

Mar 24, 2015

23 pages

Published in:

JHEP 06 (2015) 131

Published: Jun 18, 2015

e-Print:

1503.07055 [hep-ex]

DOI:

10.1007/JHEP06(2015)131

PDG:

{{\mathit B}_{{{s}}}^{0}}

\rightarrow

{{\mathit J / \psi}{(1S)}}{{\mathit K}_S^0}

Report number:

CERN-PH-EP-2015-064,
LHCB-PAPER-2015-005

Experiments:

CERN-LHC-LHCb

View in:

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Abstract: (Springer)

The first measurement of decay-time-dependent CP asymmetries in the decay B

_{s}^{0}

→ J/ψK

_{S}^{0}

and an updated measurement of the ratio of branching fractions

\mathrm{\mathcal{B}}\left({B}_{\mathrm{s}}^0\to J/\psi {K}_{\mathrm{S}}^0\right)/\mathrm{\mathcal{B}}\left({B}^0\to J/\psi {K}_{\mathrm{S}}^0\right)

are presented. The results are obtained using data corresponding to an integrated luminosity of 3.0 fb

^{−1}

of proton-proton collisions recorded with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The results on the CP asymmetries are \begin{array}{l}{\mathcal{A}}_{\Delta \Gamma}\left({B}_s^0\to J/\psi {K}_{\mathrm{S}}^0\right)=0.49{\pm}_{0.65}^{0.77}\left(\mathrm{stat}\right)\pm 0.06\left(\mathrm{syst}\right),\hfill \\ {}{C}_{\mathrm{dir}}\left({B}_s^0\to J/\psi {K}_{\mathrm{S}}^0\right)=-0.28\pm 0.41\left(\mathrm{stat}\right)\pm 0.08\left(\mathrm{syst}\right),\hfill \\ {}{S}_{\mathrm{mix}}\left({B}_s^0\to J/\psi {K}_{\mathrm{S}}^0\right)=-0.08\pm 0.40\left(\mathrm{stat}\right)\pm 0.08\left(\mathrm{syst}\right).\hfill \end{array}

Note:

18+5 pages, 5 figures, matching published version

CP violation
Hadron-Hadron Scattering
Branching fraction
B physics
Flavor physics
p p: colliding beams
B/s0: hadronic decay
J/psi(3100)
CP: violation
asymmetry: CP: time dependence

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