TY  - JOUR
AU  - Brandao, P. C. S.
AU  - Song, J.
AU  - Abreu, L. M.
AU  - Oset, E.
PY  - 2023
DA  - 2023//
TI  - B+ decay to K+ ηη with (ηη) from the D bar-D(3720) bound state
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 054004
EP  - 6pp
VL  - 108
IS  - 5
PB  - Amer Physical Soc
AB  - We search for a B decay mode where one can find a peak for a DD bound state predicted in effective theories and in lattice QCD calculations, which has also been claimed from some reactions that show an accumulated strength in D D over bar production at threshold. We find a good candidate in the B+-> K+eta eta reaction, by looking at the eta eta mass distribution. The reaction proceeds via a first step in which one has the B+-> D*+ D-0 reaction followed by D*(+) (s) decay to (DK+)-K-0 and a posterior fusion of D-0 over bar D-0 to eta eta, implemented through a triangle diagram that allows the D-0 over bar D-0 to be virtual and to produce the bound state. The choice of eta eta to see the peak is based on results of calculations that find the eta eta among the light pseudoscalar channels with stronger coupling to the D D over bar bound state. We find a neat peak around the predicted mass of that state in the eta eta mass distribution, with an integrated branching ratio for B+-> K+ (D D, bound); (D D, bound) -> eta eta of the order of 1.5 x 10(-4), a large number for hadronic B decays, which should motivate its experimental search.
SN  - 2470-0010
UR  - https://arxiv.org/abs/2307.05351
UR  - https://doi.org/10.1103/PhysRevD.108.054004
DO  - 10.1103/PhysRevD.108.054004
LA  - English
N1  - WOS:001085561600001
ID  - Brandao_etal2023
ER  -