Published November 2006
| Version v1
Report
PWA analysis of ψ(2S) → π+π- J/ψ
Creators
- 1. Institute of High Energy Physics, Chinese Academy of Science, Beijing (China)
- 2. Physics Department, Peking Univ., Beijing (China)
Description
Using 14M ψ(2S) events collected by BESII at the BEPC, a Covariant Helicity Amplitude Analysis is performed for ψ(2S) → π+π- J/ψ, J/ψ → μ+μ-. The π+π- mass spectrum, distinctly different from phase space, suggests σ production in this process. Two different theoretical schemes are tried in the global fit to the data. The results are consistent with the existence of the σ. The pole position of σ is determined to be (552-106+84) - i(232-72+81) MeV/c2. (author)
Additional details
Publishing Information
- Imprint Title
- Proceedings of the IHEP seminar on perspectives for studies of chiral particles at Beijing Spectrometer(BES)
- Imprint Pagination
- 132 p.
- Journal Page Range
- p. 67-76
- Report number
- KEK-PROC--2006-8
Conference
- Title
- IHEP seminar on perspectives for studies of chiral particles at BES
- Dates
- 23-24 Feb 2006
- Place
- Beijing (China)
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 38109536
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Conference, Non-conventional Literature
- Descriptors DEI
- BORN APPROXIMATION; BREIT-WIGNER FORMULA; HELICITY; J PSI-3097 MESONS; MASS SPECTRA; PARTIAL WAVES; PARTICLE DECAY; PION-PION INTERACTIONS; QUANTUM CHROMODYNAMICS; SIGMA MODEL; SIGMA NEUTRAL PARTICLES; SYMMETRY BREAKING; TRANSITION AMPLITUDES
- Descriptors DEC
- AMPLITUDES; APPROXIMATIONS; BARYONS; BOSON-EXCHANGE MODELS; BOSONS; CALCULATION METHODS; CHARMONIUM; DECAY; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; HADRON-HADRON INTERACTIONS; HADRONS; HYPERONS; INTERACTIONS; MATHEMATICAL MODELS; MESON-MESON INTERACTIONS; MESONS; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PROPERTIES; PERIPHERAL MODELS; QUANTUM FIELD THEORY; QUARKONIUM; SIGMA BARYONS; SIGMA PARTICLES; SPECTRA; STRANGE PARTICLES; VECTOR MESONS
Optional Information
- Notes
- 31 refs., 4 figs., 2 tabs.