D+→π+v■decayprocesswithintheQCDSRapproach

被引:0
|
作者
陈宇 [1 ]
付海冰 [1 ]
钟涛 [1 ]
吴胜波 [1 ]
黄冬 [2 ]
机构
[1] Department of Physics,Guizhou Minzu University
[2] Center of Experimental Training,Guiyang Institute of Information Science and
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O572.33 [介子];
学科分类号
摘要
In this paper,we investigate the charmed meson rare decay process ■ using an approach based on QCD sum rules.First,the pion twist-2,3 distribution amplitude(DA) moments <ζ2;π~n>|μ and <ζ3;π(p,σ),n>|μ are calculated up to the tenth and fourth orders,respectively,in the QCD sum rules according to the background field theory.After constructing the light-cone harmonic oscillator model for the pion twist-2,3 D As,we obtain their behaviors by matching the calculated ζ-moments.Then,the D→π transition form factors(TFFs) are calculated using an approach based on QCD light-cone sum rules.The vector form factor at the large recoil region is f+D→π(0)=0.627-0.080+0.120.Using the rapidly converging simplified series expansion of z(q2,t),we present the TFFs and corresponding angular coefficients in the whole squared momentum transfer physical region.Based on nonstandard neutrino interactions,the ■ decay can be related to the ■ decay indirectly.Thus,we first describe the semileptonic decay process ■,differential decay widths,and branching fraction with ■.The ■ differential/total predictions for forward-backward asymmetry,q2-differential flat terms,and lepton polarization asymmetry are also reported.The prediction for the ■ branching fraction is ■.
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页码:73 / 85
页数:13
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