Search for doubly Cabibbo suppressed decays of the charged D meson [electronic resource].
- Published
- Washington, D.C. : United States. Dept. of Energy, 1992.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description
- Pages: (322 pages) : digital, PDF file
- Additional Creators
- Stanford Linear Accelerator Center, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- The doubly Cabibbo suppressed decayed D⁺ → K⁺π{sup −}π⁺, D⁺ → K⁺π°and D⁺ → K*⁺π° are searched for in a 9.56 pb{sup −1} data sample of e⁺e{sup −} annihilation events collected near the ψ(3770) resonance with the Mark 3 detector at the SPEAR storage ring, at the Stanford Linear Accelerator Center. These rare weak decays are naively expected at a rate of tan⁴θ{sub c} relative to corresponding Cabibbo allowed decays. In the context of presently accepted models of hadronic weak decays, however, they are anticipated to be enhanced, making their experimental detection feasible in the Mark 3 data set. The experimentally simplest decay channel D⁺ → K⁺π{sup −}π⁺ is searched for inclusively through conventional analysis techniques. A signal of approximately 2.5 σ significance is obtained. An independent analysis is performed to establish examples of this decay of D⁺ → K⁺π° and K*⁺π° by full reconstruction of D⁺D{sup −} events. Exploiting the two body kinematics of ψ(3770) → D{bar D}, this second approach obtains significantly smaller backgrounds than the inclusive study. Consistent with the inclusive results, three D⁺ → K⁺π{sup −}π⁺ candidate events are observed. No events are observed for either D⁺ → K⁺π° or K*⁺π°. The branching fraction for D⁺ → K⁺π{sup −}π⁺ is measured, and limits are established on the branching fractions for D⁺ → K⁺π° and K*⁺π°. These results are used to confront the theoretical predictions from models of the weak hadronic decays of charmed mesons.
- Report Numbers
- E 1.99:slac-382
slac-382 - Subject(s)
- Other Subject(s)
- D Mesons
- Weak Particle Decay
- Branching Ratio
- Charmed Mesons
- Experimental Data
- Particle Identification
- Psi-3770 Mesons
- Quantum Chromodynamics
- Stanford Linear Collider Detector
- Bosons
- Charm Particles
- Charmonium
- Data
- Decay
- Elementary Particles
- Field Theories
- Hadrons
- Information
- Mesons
- Numerical Data
- Particle Decay
- Pseudoscalar Mesons
- Quantum Field Theory
- Quarkonium
- Vector Mesons
- Note
- Published through SciTech Connect.
03/01/1992.
"slac-382"
"DE92018588"
Labs, J.F. - Funding Information
- AC03-76SF00515
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