Hadronic charmed meson decays involving axial vector mesons

2003/01/23 by Hai-Yang Cheng · 99 citations
Physics and Astronomy · #Hadron #High-Energy Particle Collisions Research #Meson #Particle physics #Particle physics theoretical and experimental studies #Physics #Pseudoscalar #Pseudovector #Quantum Chromodynamics and Particle Interactions #Vector meson #hep-ex #hep-ph

paper · pdf · doi:10.1103/physrevd.67.094007

published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 67(9) (American Physical Society) · 19 pages

arxiv created 2003/01/23 · openalex publication_date 2003/05/13 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Cabibbo-allowed charmed meson decays into a pseudoscalar meson and an axial-vector meson are studied. The charm to axial-vector meson transition form factors are evaluated in the Isgur-Scora-Grinstein-Wise quark model. The dipole momentum dependence of the \stackrel\ensuremath→DK transition form factor and the presence of a sizable long-distance W exchange are the two key ingredients for understanding the data of \stackrel\ensuremath→DKa₁. The K_1A\ensuremath-K_1B mixing angle of the strange axial-vector mesons is found to be \ensuremath≈\ifmmode±\else\textpm\fi37\ifmmode^∘\else\textdegree\fi or \ifmmode±\else\textpm\fi58\ifmmode^∘\else\textdegree\fi from \stackrel\ensuremath→\ensuremathτK₁\ensuremathν_\ensuremathτ decays. The study of \stackrel\ensuremath→DK₁(1270)\ensuremathπ, K₁(1400)\ensuremathπ decays excludes the positive mixing-angle solutions. It is pointed out that an observation of the decay D⁰\ensuremath→K₁^\ensuremath-(1400)\ensuremathπ⁺ at the level of 5\ifmmode×\else\texttimes\fi10^\ensuremath-4 will rule out \ensuremathθ\ensuremath≈\ensuremath-37\ifmmode^∘\else\textdegree\fi and favor the solution \ensuremathθ\ensuremath≈\ensuremath-58\ifmmode^∘\else\textdegree\fi. Though the decays D⁰\ensuremath→K₁⁰\ensuremathπ⁰ are color suppressed, they are comparable to and even larger than the color-allowed counterparts K₁⁰(1270)\ensuremathπ⁰\ensuremath∼K₁^\ensuremath-(1270)\ensuremathπ⁺ and K₁⁰(1400)\ensuremathπ⁰>K₁^\ensuremath-(1400)\ensuremathπ⁺. The finite width effect of the axial-vector resonance is examined. It becomes important for a₁(1260) in particular when its width is near 600 MeV.

Citations

• Describinga1andb1decays
• Resonance structure of τ-→K-π+π-ντ decays
• Two-body Cabibbo-suppressed charmed meson decays
• Constraint on axial-vector meson mixing angle from the nonrelativistic constituent quark model
• HadronicDdecays involving scalar mesons

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