Ai-Jun Ma

The S-wave resonance contributions to the three-body decays

In this paper, we study the three-body decays

in perturbative QCD approach

B^0/B^0_s \rightarrow \eta _c f_0(X)\rightarrow \eta _c \pi ^+\pi ^-

Quasi-two-body decays B → ηc(1S,2S) [ρ(770),ρ(1450),ρ(1700)→] ππ in the perturbative QCD approach

B0/Bs0→ηcf0(X)→ηcπ+π- by employing the perturbative QCD (PQCD) factorization approach. We evaluate the S-wave resonance contributions by using the two-pion distribution amplitude

B_{(s)}\to P\rho^\prime(1450), P\rho^{\prime\prime}(1700)\to P\pi\pi

\Phi _{\pi \pi }^\mathrm{S}

The quasi-two-body decays B(s)→(D(s),D¯(s))ρ→(D(s),D¯(s))ππ in the perturbative QCD factorization approach

ΦππS. The Breit–Wigner formula for the