Branching ratios and direct CP asymmetries in D -> PP decays

	Branching ratios and direct CP asymmetries in D -> PP decays
	Lv CD(吕才典); 于福升;Li, HN; Lu, CD; Yu, FS
刊名	PHYSICAL REVIEW D
	2012
卷号	86 期号:3 页码:36012
英文摘要	We propose a theoretical framework for analyzing two-body nonleptonic D meson decays, based on the factorization of short-distance (long-distance) dynamics into Wilson coefficients (hadronic matrix elements of four-fermion operators). The parametrization of hadronic matrix elements in terms of several nonperturbative quantities is demonstrated for the D -> PP decays, P denoting a pseudoscalar meson. We consider the evolution of Wilson coefficients with energy release in individual decay modes, and the Glauber strong phase associated with the pion in nonfactorizable annihilation amplitudes, that is attributed to the unique role of the pion as a Nambu-Goldstone boson and a quark-antiquark bound state simultaneously. The above inputs improve the global fit to the branching ratios involving the eta' meson and resolve the long-standing puzzle from the D-0 -> pi(+) pi(-) and D-0 -> K+ K- branching ratios, respectively. Combining short-distance dynamics associated with penguin operators and the hadronic parameters determined from the global fit to branching ratios, we predict direct CP asymmetries, to which the quark loops and the scalar penguin annihilation give dominant contributions. In particular, we predict Delta A(CP) equivalent to A(CP()K(+) K-) - A(CP) (pi(+) pi(-)) = -1.00 x 10(-3), lower than the LHCb and CDF data.
学科主题	Astronomy & Astrophysics; Physics
收录类别	SCI
WOS记录号	WOS:000308008100010
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224539]
专题	高能物理研究所_理论物理室
推荐引用方式 GB/T 7714	Lv CD,于福升；Li, HN,Lu, CD,et al. Branching ratios and direct CP asymmetries in D -> PP decays[J]. PHYSICAL REVIEW D,2012,86(3):36012.
APA	吕才典,于福升；Li, HN,Lu, CD,&Yu, FS.(2012).Branching ratios and direct CP asymmetries in D -> PP decays.PHYSICAL REVIEW D,86(3),36012.
MLA	吕才典,et al."Branching ratios and direct CP asymmetries in D -> PP decays".PHYSICAL REVIEW D 86.3(2012):36012.