Using (106±4)×10⁻⁶ ψ(3686) events accumulated with the BESIII detector at the BEPCII e⁺e⁻ collider, we present the first measurement of decays of χ(c1) to vector meson pairs φφ, ωω, and ωφ. The branching fractions are measured to be (4.4±0.3±0.5)×10⁻⁴, (6.0±0.3±0.7)×10⁻⁴, and (2.2±0.6±0.2)×10⁻⁵, for χ(c1)→φφ, ωω, and ωφ, respectively, which indicates that the hadron helicity selection rule is significantly violated in χ(cJ) decays. In addition, the measurement of χ(cJ)→ωφ provides the first indication of the rate of doubly OZI-suppressed χ(cJ) decay. Finally, we present improved measurements for the branching fractions of χ(c0) and χ(c2) to vector meson pairs.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.107.092001 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Heavy meson couplings in Hard-Wall AdS/QCD correspondence with = 5.
Heliyon
February 2024
Optics-Laser Science and Technology Research Center, Malek Ashtar University of Technology, Isfahan, Iran.
In this article, Hard-Wall AdS/QCD with 5 flavors is used to study pseudoscalar, vector and axial-vector meson. The mass and decay constants of , , , , , , , , , and as well as strong couplings of , , , , , , , , , , , , and vertices are estimated in this study. A comparison of the results of the masses, decay constants, and strong couplings with existing predictions is also made.
View Article and Find Full Text PDFHadron-ion collisions in Pythia and the vector-meson dominance model for photoproduction.
Eur Phys J C Part Fields
November 2024
Department of Physics, University of Jyvaskyla, P.O. Box 35, Fl-40014 Jyvaskyla, Finland.
Article Synopsis
- The extension of the Pythia Monte Carlo event generator allows for detailed simulations of collisions between a hadron beam and nuclear targets, with energy variations for each event.
- The work builds on existing models like Angantyr for heavy ions and includes a vector-meson dominance (VMD) model for simulating real photon interactions in photo-nuclear collisions.
- Validation with HERA data shows the model's effectiveness, and the generated events for ultra-peripheral heavy-ion collisions at the LHC align with ATLAS measurements, demonstrating consistency in single-particle multiplicity and azimuthal anisotropy patterns.
Limits on W_{R} from Meson Decays.
Phys Rev Lett
October 2024
Instituto de Física, Universidade de São Paulo, C.P. 66.318, 05315-970 São Paulo, Brazil.
In this Letter we show that pseudoscalar meson leptonic decay data can be used to set stringent limits on the mass m_{W_{R}} of a right-handed vector boson, such as the one that appears in left-right symmetric models. We have shown that for a heavy neutrino with a mass m_{N} in the range 50
We present a comprehensive study of B^{0}→ωω decays using 772×10^{6} BB[over ¯] pairs collected with the Belle detector at the KEKB e^{+}e^{-} collider. This process is a suppressed charmless decay into two vector mesons and can exhibit interesting polarization and CP violation. The decay is observed for the first time with a significance of 7.
View Article and Find Full Text PDFBound Isoscalar Axial-Vector bcu[over ¯]d[over ¯] Tetraquark T_{bc} from Lattice QCD Using Two-Meson and Diquark-Antidiquark Variational Basis.
Phys Rev Lett
May 2024
Department of Theoretical Physics, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India.
We report a lattice QCD study of the heavy-light meson-meson interactions with an explicitly exotic flavor content bcu[over ¯]d[over ¯], isospin I=0, and axial-vector J^{P}=1^{+} quantum numbers in search of possible tetraquark bound states. The calculation is performed at four values of lattice spacing, ranging from ∼0.058 to ∼0.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!