# name
Measurement of the time-dependent CP asymmetries in B {s/0} → J/ ψK {S/0}

# metadata.dc.description.abstract[].value
The first measurement of decay-time-dependent CP asymmetries in the decay B0 s → J/ψ K0 S and an updated measurement of the ratio of branching fractions B(B0 s → J/ψ K0 S )/B(B0→ J/ψ K0 S ) 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 A∆Γ B 0 s → J/ψ K0 S  = 0.49 ± 0.77 0.65 (stat) ± 0.06 (syst) , Cdir B 0 s → J/ψ K0 S  = −0.28 ± 0.41 (stat) ± 0.08 (syst) , Smix B 0 s → J/ψ K0 S  = −0.08 ± 0.40 (stat) ± 0.08 (syst) . The ratio B(B0 s → J/ψ K0 S )/B(B0→ J/ψ K0 S ) is measured to be 0.0431 ± 0.0017 (stat) ± 0.0012 (syst) ± 0.0025 (fs/fd) , where the last uncertainty is due to the knowledge of the B0 s and B0 production fractio

# metadata.dc.relation.ispartof[].value
Journal of High Energy Physics, 2015, vol. 2015, num. 131, p. 1-24

# metadata.dc.rights[].value
cc-by (c) LHCb collaboration et al., 2015

# metadata.dc.source[].value
Articles publicats en revistes (Física Quàntica i Astrofísica)

# metadata.dc.subject.other[].value
Large Hadron Collider (France and Switzerland)

# metadata.dc.title[].value
Measurement of the time-dependent CP asymmetries in B {s/0} → J/ ψK {S/0}