Study of scalar meson a<SUB>0</SUB>(980) from B→a<SUB>0</SUB>(980)π decays

ZHANG Zhi-Qing; XIAO Zhen-Jun

doi:10.1088/1674-1137/34/5/002

Chinese Physics C> 2010, Vol. 34> Issue(5) : 528-534 DOI: 10.1088/1674-1137/34/5/002

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

ZHANG Zhi-Qing ,
XIAO Zhen-Jun ^,

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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^－, a^－₀(980)π⁺ and B－→ a⁰₀(980)π^－, a^－₀(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^－→a^－₀(980)π⁰ decays can be large, about (70—80)% for α=100°.

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[1]

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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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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author: XIAO Zhen-Jun,

Received Date: 2009-07-22

Accepted Date: 2009-12-10

Available Online: 2010-05-05

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^－, a^－₀(980)π⁺ and B－→ a⁰₀(980)π^－, a^－₀(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^－→a^－₀(980)π⁰ decays can be large, about (70—80)% for α=100°.

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

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

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

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

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