The signatures of the exclusive decays into a meson and a photon include a high-energy photon and a meson appearing approximately back-to-back in the detector following the decay of the H or Z boson, where there is a resonance in di-track mass to reconstruct the meson and in three-body...
Charmed Meson ResonancesFeynman DiagramParticle WidthsQuarksWeak Hadronic DecayThe recent data on quasi-two-body weak nonleptonic decays D implies Krho, K* pi are discussed in terms of the simple model where C-quark decay diagrams dominate (the spectator model). The agreement of this model with...
The \Gamma _1 and \Gamma _2 are for the upper and lower vertices of the one-boson-exchange Feynman diagram, respectively. The I_{i} is the flavor factor for certain meson exchange which can be derived using the Lagrangians in Eqs. (1), (5) and (6) and the matrices in Eqs. (2...
2 The Feynman diagram of the non-leptonic decay of B¯(s) meson into D-wave charmed meson. X denotes a light meson CKM matrix element; a1 = c1 + 1 Nc c2, where Nc = 3 is the number of colors. For b decays, we take μ = mb, and a1 = 1.14, a2 = −0.2 [47] are ...
Radiative decay modes of the D{sup 0} meson In this paper we describe a search for four radiative decay modes of the D{sup 0} meson: D{sup 0}{r_arrow}{phi}{gamma}, D{sup 0}{r_arrow}{omega}{gamma}, D{... DM Asner,J Gronberg,TS Hill,... - 《Physical Review D》 被引量...
We also apply the pole model to calculate the Bq meson decay. The main contribution here is the radiative transition of the Bq meson into an intermediate (virtual)B∗. The Feynman diagram is shown in Fig.3.The subsequent process B∗→ν¯νis determined in SM by the e,ective Hamilt...
decay chain衰变链 decay coefficient衰变常数 decay constant衰变常数 decay constant衰变常量 decay energy衰变能 decay factor衰变常数 decay fraction衰变分 decay heat removal system衰变热去除系统 decay heat衰变热 decay kinematics衰变运动学 decay out完全衰变 decay period冷却周期 decay power衰减功率 decay rate衰...
Fig. 1. Feynman diagrams for the two-body decay ⁎⁎Y(4260)→D⁎D¯⁎ in our scenario. In the framework of non-relativistic effective field theory (NREFT) the Lagrangians for the coupling vertices in Fig. 1 can be written as [7], [8], [19], [20](1)LYD1D¯=iyeff2(...
We point out that previous calculations in the literature are gauge-dependent due to the omission of an important diagram, which gives the dominant contribution in the 't Hooft-Feynman gauge. We have analyzed in detail the region of the (M , tanβ) plane to be probed by searches for B ...
We analyze all possible quantum number assignments for the DsJ(2860) in terms of both cs̅ and cns̅ n̅ configurations. We discuss the role played by the electromagnetic and strong decay widths as 展开 DOI: 10.1103/PhysRevD.79.037501 年份: 2009 收藏 引用 批量...