https://doi.org/10.1140/epjc/s10052-011-1832-x
Regular Article - Theoretical Physics
Anatomy of
1
Nikhef, Science Park 105, 1098, XG Amsterdam, The Netherlands
2
Dipartimento di Scienze Fisiche, Università di Napoli Federico II and I.N.F.N., Sezione di Napoli, Complesso Universitario di Monte Sant’Angelo, Via Cintia, 80126, Naples, Italy
* e-mail: Robert.Fleischer@nikhef.nl
Received:
26
October
2011
Published online:
9
December
2011
The decay offers an interesting experimental alternative to the well-known
channel for the search of CP-violating New-Physics contributions to
–
mixing. As the hadronic structure of the f
0(980) has not yet been settled, we take a critical look at the implications for the relevant observables and address recent experimental data. It turns out that the effective lifetime of
and its mixing-induced CP asymmetry S are quite robust with respect to hadronic effects and thereby allow us to search for a large CP-violating
–
mixing phase ϕ
s
, which is tiny in the Standard Model. However, should small CP violation, i.e. in the range −0.1≲S≲0, be found in
, it will be crucial to constrain hadronic corrections in order to distinguish possible New-Physics effects from the Standard Model. We point out that
, which has not yet been measured, is a key channel in this respect and discuss the physics potential of this decay.
© Springer-Verlag / Società Italiana di Fisica, 2011