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Exploring CP violation and eta-eta' mixing with the Bs,d(0) -> J/psi eta((')) systems

Author:
Fleischer, Robert  Knegjens, Robert  Ricciardi, Giulia  


Journal:
EUROPEAN PHYSICAL JOURNAL C


Issue Date:
2011


Abstract(summary):

The B(s,d)(0) -> J/psi eta((')) decays provide new terrain for exploring CP violation. After briefly discussing eta-eta' mixing, we analyse the effective lifetimes and CP-violating observables of the B(s) channels, which allow us to probe New-Physics effects in B(s)(0)-(B) over bar (0)(s) mixing. We have a critical look at these observables and show how hadronic corrections can be controlled by means of the B(d) decays. Using measurements of the B(s,d)(0) -> J/psi eta((')) branching ratios by the Belle collaboration, we discuss tests of the SU(3)F flavour symmetry of strong interactions, obtain the first constraints on the hadronic parameters entering the B(s,d)(0) -> J/psi eta system, and predict the B(s,d)(0) -> J/psi eta' branching ratio at the 5 x 10(-6) level. Furthermore, we present strategies for the determination of the eta-eta' mixing parameters from the B(s,d)(0)-> J/psi eta((')) observables. We also observe that the B(s,d)(0) -> J/psi eta and B(s,d)(0) -> J/psi eta' decays are-from a formal point of view-analogous to the quark-antiquark and tetraquark descriptions of the f(0)(980) in the B(s,d)(0) -> J/psi f(0)(980) channels, respectively.


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