%0 Journal Article
%T Anomalous tqZ coupling effects in rare B- and K-meson decays
%A Li, X. Q.
%A Yang, Y. D.
%A Yuan, X. B.
%J Journal of High Energy Physics
%D 2012
%V 03
%N 3
%I Springer
%@ 1126-6708
%G English
%F Li_etal2012
%O WOS:000302412100018
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1011), last updated on Thu, 24 May 2012 22:10:50 +0000
%X As a top-factory, the LHC is performing a direct study of top-quark anomalous FCNC couplings, which are, however, correlated closely with the rare B- and K-meson decays. In this paper, we study the effects of anomalous tqZ (with q = u, c) couplings in the rare decays B-s,B-d -> mu(+)mu(-), B -> X-s nu(nu) over bar, B -> K(*)nu(nu) over bar, K+ -> pi(+)nu(nu) over bar, and K-L -> pi(0)nu(nu) over bar. With the up-to-date experimental bounds on the branching ratios of these channels, constraints on the left-handed anomalous couplings X-ct(L), and X-ut(L) are derived, respectively. With these low-energy constraints taken into account, we find that, for real couplings X-ct(L) and X-ut(L), the indirect upper bounds on B(t -> qZ) are much lower than that from the D0 collaboration, but are still compatible with the 5 sigma discovery potential of ATLAS with an integrated luminosity of 10 fb(-1). With refined measurements to be available at the LHCb, the future super-B factories, the NA62 at CERN, and the KOTO at J-PARC, closer correlations between the t -> qZ and the rare B- and K-meson decays are expected in the near future, which will be helpful for the searches of thu e top-quark FCNC decays at the LHC.
%K Rare Decays
%K Beyond Standard Model
%K B-Physics
%K Kaon Physics
%R 10.1007/JHEP03(2012)018
%U http://arxiv.org/abs/1112.2674
%U https://doi.org/10.1007/JHEP03(2012)018
%P 018-22pp