Study of scalar meson a0(980) from B→a0(980)π decays

  • In this paper, we calculate the branching ratios and the direct CP-violating asymmetries for decays B0→a00(980)π0, a+0(980)π, a0(980)π+ and B-→ a00(980)π, a0(980)π0 by employing the perturbative QCD (pQCD) factorization approach at the leading order. We found that (a) the pQCD predictions for the branching ratios are around (0.4-2.8)×10-6, consistent with currently available experimental upper limits; (b) the CP asymmetries of B0→a00(980)π0 and B→a0(980)π0 decays can be large, about (70—80)% for α=100°.

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ZHANG Zhi-Qing and XIAO Zhen-Jun. Study of scalar meson a0(980) from B→a0(980)π decays[J]. Chinese Physics C, 2010, 34(5): 528-534. doi: 10.1088/1674-1137/34/5/002
ZHANG Zhi-Qing and XIAO Zhen-Jun. Study of scalar meson a0(980) from B→a0(980)π decays[J]. Chinese Physics C, 2010, 34(5): 528-534.  doi: 10.1088/1674-1137/34/5/002 shu
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Received: 2009-07-22
Revised: 2009-12-10
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Study of scalar meson a0(980) from B→a0(980)π decays

    Corresponding author: XIAO Zhen-Jun,

Abstract: 

In this paper, we calculate the branching ratios and the direct CP-violating asymmetries for decays B0→a00(980)π0, a+0(980)π, a0(980)π+ and B-→ a00(980)π, a0(980)π0 by employing the perturbative QCD (pQCD) factorization approach at the leading order. We found that (a) the pQCD predictions for the branching ratios are around (0.4-2.8)×10-6, consistent with currently available experimental upper limits; (b) the CP asymmetries of B0→a00(980)π0 and B→a0(980)π0 decays can be large, about (70—80)% for α=100°.

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