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B -> S transition form factors in the perturbative QCD approach
Li RH(李润辉); Lv CD(吕才典); Wang W(王伟); Wang XX(王晓霞); Li, RH; Lu, CD; Wang, W; Wang, XX
2009
发表期刊PHYSICAL REVIEW D
卷号79期号:1页码:14013
通讯作者[Li, Run-Hui] Shandong Univ, Sch Phys, Jinan 250100, Shandong, Peoples R China ; [Li, Run-Hui ; Lue, Cai-Dian ; Wang, Wei ; Wang, Xiao-Xia] Inst High Energy Phys, Beijing 100049, Peoples R China ; Nanjing Normal Univ, Dept Phys, Nanjing 210097, Peoples R China ; [Lue, Cai-Dian] Nanjing Normal Univ, Inst Theoret Phys, Nanjing 210097, Peoples R China
文章类型Article
摘要Under two different scenarios for the light scalar mesons, we investigate the transition form factors of B(B(s)) mesons decay into a scalar meson in the perturbative QCD approach. In the large recoiling region, the form factors are dominated by the short-distance dynamics and can be calculated using perturbation theory. We adopt the dipole parametrization to recast the q(2) dependence of the form factors. Since the decay constants defined by the scalar current are large, our predictions on the B ! S form factors are much larger than the B -> P transitions, especially in the second scenario. Contributions from various light-cone distribution amplitudes (LCDAs) are elaborated and we find that the twist-3 LCDAs provide more than one-half of the contributions to the form factors. The two terms of the twist-2 LCDAs give destructive contributions in the first scenario while they give constructive contributions in the second scenario. With the form factors, we also predict the decay width and branching ratios of the semileptonic B -> Sl (v) over bar and B -> Sl(+)l(-) decays. The branching ratios of B -> Sl (v) over bar channels are found to have the order of 10(-4) while those of B -> Sl(+)l(-) have the order of 10(-7). These predictions can be tested by the future experiments.
学科领域Astronomy & Astrophysics; Physics
研究领域[WOS]Astronomy & Astrophysics ; Physics ; Astronomy & Astrophysics ; Physics
DOI10.1103/PhysRevD.79.014013
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语种英语
研究领域[WOS]Astronomy & Astrophysics ; Physics ; Astronomy & Astrophysics ; Physics
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000262979700038
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被引频次:56[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240431
专题理论物理室
作者单位中国科学院高能物理研究所
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Li RH,Lv CD,Wang W,et al. B -> S transition form factors in the perturbative QCD approach[J]. PHYSICAL REVIEW D,2009,79(1):14013.
APA 李润辉.,吕才典.,王伟.,王晓霞.,Li, RH.,...&Wang, XX.(2009).B -> S transition form factors in the perturbative QCD approach.PHYSICAL REVIEW D,79(1),14013.
MLA 李润辉,et al."B -> S transition form factors in the perturbative QCD approach".PHYSICAL REVIEW D 79.1(2009):14013.
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