Gérard, Jean-Marc
[UCL]
Kou, E.
(eng)
We estimate the density matrix element for the pi^0, eta and eta' production
from the vacuum in the large-N_c limit. As a consequence, we find that the QCD
axial anomaly leads to highly non-trivial corrections to the usual flavour
SU(3) relations between B^0-> K^0 pi^0, B^0-> K^0 eta and B^0-> K^0 eta' decay
amplitudes. These corrections may explain why the B-> K eta' branching ratio is
about six times larger than the B-> K pi one.
Comment: 5 pages, 1 figure
Bibliographic reference |
Gérard, Jean-Marc ; Kou, E.. Anomalous enhancement of a penguin hadronic matrix element in B ---> K eta-prime. (2006) 5 p. pages |
Permanent URL |
http://hdl.handle.net/2078/31041 |