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Branching ratios and direct CP asymmetries in D -> PP decays
Lv CD(吕才典); 于福升;Li, HN; Lu, CD; Yu, FS
2012
发表期刊PHYSICAL REVIEW D
卷号86期号:3页码:36012
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.
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.86.036012
收录类别SCI
WOS记录号WOS:000308008100010
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被引频次:54[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/311005/224539
专题理论物理室
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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.
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