Ds+→πK衰变过程的软胶子效应研究

D_s⁺→πK衰变过程的软胶子效应研究

摘要: 本文在QCD因子化方法的基础上利用光锥QCD求和规则研究了D_s⁺→πK两个衰变道中的软胶子交换效应，并在衰变总振幅中加入了来自软胶子交换的贡献。计算结果与实验数据符合得很好。
- 非轻子衰变 ,
- 非因子化 ,
- 软胶子效应
Abstract: In this paper, based on the QCD factorization (QCDF), the soft-gluon exchange effect in D_s⁺→πK⁰ and D_s⁺→π⁰K⁺decays was studied by using light-cone QCD sum rules. After taking the contribution from the correction of soft-gluon effect into account in the total decay amplitude, it is found that the final results of calculation are consistent with the latest experiment data.
- non-lepton decay ,
- non-factorization ,
- soft-gluon exchange effect

[1]	BUCHALLA G, KOMATSUBARA T K, MUHEIM F, et al. B, D and K decays[J]. Eur Phys, 2008, JC57: 309-492.
[2]	ROHIT D, VERMA R C, AVINASH S. Analysis of B→PP weak decays using quark diagram scheme[J/OL]. [2009-03-02]. http://arxiv.org/abs/0902.2538.
[3]	KHOSRAVI R, AZIZI K, GHAHRAMANY N. Semileptonic Dq → K₁l_ν and nonleptonic D→K_1π decays in three-point QCD sum rules and factorization approach[J]. Phys Rev D, 2009, 79: 036004.
[4]	AMSLER C, DOSER M, ANTONELLI M, et al. Particle data group[J]. Phys Lett B, 2008, 667: 1-66.
[5]	BELYAEV V M, BRAUM V M, KHODJAMIRIAN A, et al. D^Dπ and B^Bπ couplings in QCD[J]. Phys Rev D, 1995, 59: 6 177-6 195.
[6]	OVCHINNIKOV A A, PIVOVAROV A A. The calculation of the leading m_s corrections to the PCAC relation for the K-meson[J]. Phys Lett B, 1985, 163: 231-235.
[7]	KHODJAMIRIAN A, RUCKL R, WEINZIERL S, et al. Predictions on B→πlν₁, D→πlν₁, and D→πlν₁from QCD light-cone sum rules[J]. Phys Rev D, 2000, 62: 114002.