Evidence for two-quark content of $f_{0}(980)$ in exclusive $b\to c$ decays

Details Evidence for two-quark content of $f_{0}(980)$ in exclusive $b\to c$ decays Evidence for two-quark content of $f_{0}(980)$ in exclusive $b\to c$ decays

2003-02-08

arxiv.org/abs/hep-ph/0302059v2

Phys.Rev.D67:094011,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figures, Revtex4, version to appear in PRD

Scientific paper

10.1103/PhysRevD.67.094011

Inspired by a large decay branching ratio (BR) of $B^{+}\to f_{0}(980)K^{+}$ measured by Belle recently, we propose that a significant evidence of the component of $n\bar{n}=(u\bar{u}+d\bar{d})/\sqrt{2}$ in $f_{0}(980)$ could be demonstrated in exclusive $b\to c$ decays by the observation of $f_{0}(980)$ in the final states $\bar{B}\to D^{0(*)} \pi^{+} \pi^{-}(KK)$ and $\bar{B}\to J/\Psi \pi^{+} \pi^{-}(KK)$. We predict the BRs of $\bar{B}\to D^{0(*)} (J/\Psi) f_{0}(980)$ to be ${\cal {O}}(10^{-4})$ (${\cal {O}}(10^{-5})$) while the unknown wave functions of $D^{(*)0}$ ($J/\Psi$) are chosen to fit the observed decays of $\bar{B}\to D^{(*)0} \pi^{0} (J/\Psi K^{0(*)})$.

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