2022/12/31 by Ru-Min Wang, Yuexin Liu, Wang, Ru-Min +7
Physics and Astronomy · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #High-Energy Particle Collisions Research
paper · pdf · doi:10.48550/arxiv.2301.00079
Many exclusive c→ d/sℓ+ν_ℓ~(ℓ=e,μ,τ) transitions have been well measured, and they can be used to test the theoretical calculations. Motivated by this, we study the D→ P/V/Sℓ+ν_ℓ decays induced by the c→ d/sℓ+ν_ℓ transitions with the SU(3) flavor symmetry approach, where P denotes the pseudoscalar meson, V denotes the vector meson, and S denotes the scalar meson with a mass below 1 GeV. The different decay amplitudes of the D→ Pℓ+ν_ℓ, D→ Vℓ+ν_ℓ or D→ Sℓ+ν_ℓ decays can be related by using the SU(3) flavor symmetry and by considering the SU(3) flavor breaking. Using the present data of D→ P/V/Sℓ+ν_ℓ, we predict the not yet measured or not yet well measured processes in the D→ P/V/Sℓ+ν_ℓ decays. We find that the SU(3) flavor symmetry approach works well in the semileptonic D → P/Vℓ+ν_ℓ decays. For the D → Sℓ+ν_ℓ decays, only the decay D+s→ f0(980)e+νe has been measured, the branching ratios of the D+s→ f0(980)e+νe and D→ S(S→ P1P2)ℓ+ν_ℓ decays are used to constrain the nonperturbative parameters and then predict not yet measured D → Sℓ+ν_ℓ decays, in addition, the two quark and the four quark scenarios for the light scalar mesons are analyzed. The SU(3) flavor symmetry predictions of the D → Sℓ+ν_ℓ decays need to be further tested, and our predictions of the D → Sℓ+ν_ℓ decays are useful for probing the structure of light scalar mesons. Our results in this work could be used to test the SU(3) flavor symmetry approach in the semileptonic D decays by the future experiments at BESIII, LHCb and BelleII.