Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-01-10
Phys.Rev. D52 (1995) 1597-1613
Physics
High Energy Physics
High Energy Physics - Phenomenology
35 pages ( Latex ) with 10 figures (available by request)
Scientific paper
10.1103/PhysRevD.52.1597
We show that the factorization assumption in color-suppressed $B$ meson decays is not ruled out by experimental data on $B \ra K(K^*) + J/\Psi(\Psi^{'})$. The problem previously pointed out might be due to an inadequate choice of hadronic form factors. Within the Isgur-Wise SU(2) heavy flavor symmetry framework, we search for possible $q^2$ dependence of form factors that are capable of explaining simultaneously the large longitudinal polarization $\rho_L$ observed in $B \ra K^* + J/\Psi$ and the relatively small ratio of rates $R_{J/\Psi} = \Gamma(B \ra K^* + J/\Psi)/\Gamma(B \ra K + J/\Psi)$. We find out that the puzzle could be essentially understood if the $A_1(q^2)$ form factor is frankly decreasing, instead of being almost constant or increasing as commonly assumed. Of course, the possibility of understanding experimental data is not necessarily a proof of factorization.
Gourdin M.
Keum Yong-Yeon
Pham Xuan-Yem
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