Quark-Diagram Analysis of Two-Body Charm Decays

Chau, Ling‐Lie; Cheng, Hai-Yang

doi:10.1103/physrevlett.56.1655

Cited by 142 publications

(94 citation statements)

References 13 publications

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“…The SU (3) flavor symmetry has been shown useful in finding relative strong phases of amplitudes in D → P P decays 39,69,70 . The flavor-topology technique for analyzing charmed meson decays makes use of SU (3) The decay amplitudes are expressed in terms of topological quark-flow diagrames; the diagrams used in this analysis are given in Fig.…”

Section: Flavor-topology Amplitudes and Relative Phasesmentioning

confidence: 99%

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D MESON HADRONIC DECAYS AT CLEO-c

Yang

2011

Int. J. Mod. Phys. A

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The recent CLEO-c results on hadronic decays of D and Ds mesons are presented. First the absolute branching fractions for D and Ds mesons using a double tag technique are discussed, then are the Cabibbo suppressed decays and doubly Cabibbo suppressed decays. Finally, I present the inclusive and rare decay modes and other measurements from CLEO-c. These decays illuminate a wide range of physics. A brief theoretical introduction is given before the corresponding discussion on measurement.

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Section: Flavor-topology Amplitudes and Relative Phasesmentioning

confidence: 99%

“…Table 12 67 shows the representations of these amplitudes as a function of θ η . A plotting technique 39,66,67,69,70 is used to determine SE ′ and SA ′ as illustrated in Fig. 18 67 .…”

Section: Flavor-topology Amplitudes and Relative Phasesmentioning

confidence: 99%

D MESON HADRONIC DECAYS AT CLEO-c

Yang

2011

Int. J. Mod. Phys. A

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“…In this diagrammatic scenario, all two-body nonleptonic weak decays of heavy mesons can be expressed in terms of six distinct quark diagrams [6,7,2]: T , the color-allowed external W -emission tree diagram; C, the color-suppressed internal W -emission diagram; E, the W -exchange diagram; A, the W -annihilation diagram; P , the horizontal W -loop diagram; and V , the vertical W -loop diagram. (The one-gluon exchange approximation of the P graph is the so-called "penguin diagram".)…”

Section: Quark Diagram Scheme and Final-state Interactionsmentioning

confidence: 99%

“…It has been established sometime ago that a least model-independent analysis of heavy meson decays can be carried out in the so-called quark-diagram approach [6,7,2]. Based on SU(3) flavor symmetry, this model-independent analysis enables us to extract the topological quark-graph amplitudes for D → P P, V P decays and see the relative importance of different underlying decay mechanisms.…”

Section: Introductionmentioning

confidence: 99%

HadronicDdecays involving scalar mesons

Cheng

2003

Phys. Rev. D

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The nonleptonic weak decays of charmed mesons into a scalar meson and a pseudoscalar meson are studied. The scalar mesons under consideration are σ [or f 0 (600)], κ, f 0 (980), a 0 (980) and K * 0 (1430). A consistent picture provided by the data suggests that the light scalars below or near 1 GeV form an SU(3) flavor nonet and are predominately the q 2q2 states, while the scalar mesons above 1 GeV can be described as a qq nonet. Hence, we designate q 2q2 to σ, κ, a 0 (980), f 0 (980) and qq to K * 0 . Sizable weak annihilation contributions induced from final-state interactions are essential for understanding the data. Except for the Cabibbo doubly suppressed channel D + → f 0 K + , the data of D → σπ, f 0 π, f 0 K, K * 0 π can be accommodated in the generalized factorization approach. However, the predicted rates for D → a 0 π, a 0 K are too small by one to two orders of magnitude when compared with the preliminary measurements. Whether or not one can differentiate between the two-quark and four-quark pictures for the f 0 (980) produced in the hadronic charm decays depends on the isoscalar f 0 −σ mixing angle in the qq model.

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“…In this diagrammatic sce-nario, all two-body nonleptonic weak decays of heavy mesons can be expressed in terms of six distinct quark diagrams [10,11,12]: T , the color-allowed external W -emission tree diagram; C, the color-suppressed internal W -emission diagram; E, the W -exchange diagram; A, the W -annihilation diagram; P , the horizontal W -loop diagram; and V , the vertical W -loop diagram. (The one-gluon exchange approximation of the P graph is the so-called "penguin diagram".)…”

Section: Introductionmentioning

confidence: 99%

Remarks on the quark content of the scalar mesonf0(1370)

Cheng

2003

Phys. Rev. D

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Based on the measurements of (D + s , D + ) → f 0 (1370)π + we determine, in a model independent way, the allowed ss content in the scalar meson f 0 (1370). We find that, on the one hand, if this isoscalar resonance is a pure nn state [ nn ≡ (uū + dd)/ √ 2 ], a very large W -annihilation term will be needed to accommodate D + s → f 0 (1370)π + . On the other hand, the ss component of f 0 (1370) should be small enough to avoid excessive D + s → f 0 (1370)π + induced from the external W -emission. Measurement of f 0 (1370) production in the decay D + s → K + K − π + will be useful to test the above picture. For the decay D 0 → f 0 (1370)K 0 which is kinematically barely or even not allowed, depending on the mass of f 0 (1370), we find that the finite width effect of f 0 (1370) plays a crucial role on the resonant three-body decay D 0 → f 0 (1370)K 0 → π + π − K 0 .

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Quark-Diagram Analysis of Two-Body Charm Decays

Abstract: Two-body decays of charm mesons are analyzed in the quark-diagram formulation, including effects of SU(3) breaking and final-state interactions. Interesting future experiments are also pointed out.

Cited by 142 publications

References 13 publications

D MESON HADRONIC DECAYS AT CLEO-c

D MESON HADRONIC DECAYS AT CLEO-c

HadronicDdecays involving scalar mesons

Remarks on the quark content of the scalar mesonf0(1370)

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