Understanding the newly observed Y(4008) by Belle

2007/08/31 by Xiang Liu · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph #nucl-ex #nucl-th

paper · pdf · doi:10.1140/epjc/s10052-008-0551-4

published as Eur.Phys.J.C54:471-474,2008 · 4 pages, 5 figures. Typos corrected

arxiv created 2007/11/19 · openalex publication_date 2008/02/19 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/29

Abstract

Very recently a new enhancement around 4.05 GeV was observed by Belle experiment. In this short note, we discuss some possible assignments for this enhancement, i.e. ψ(3S) and D^*D^* molecular state. In these two assignments, Y(4008) can decay into J/ψπ⁰π⁰ with comparable branching ratio with that of Y(4008)→ J/ψπ⁺π^-. Thus one suggests high energy experimentalists to look for Y(4008) in J/ψπ⁰π⁰ channel. Furthermore one proposes further experiments to search missing channel DD, DD^*+h.c. and especially χ_cJπ⁺π^-π⁰ and η_cπ⁺π^-π⁰, which will be helpful to distinguish ψ(3S) and D^*D^* molecular state assignments for this new enhancement.

Citations

• Observation and Properties of theX(3872)Decaying toJ/ψπ+π−inpp¯Collisions ats=1.96 TeV
• POSSIBLE NEW RESONANCE AT THE D^* D^* THRESHOLD IN e+e- ANNIHILATION
• QCD Multipole Expansion and Hadronic Transitions in Heavy Quarkonium Systems
• Study of theB−→J/ψK−π+π−decay and measurement of theB−→X(3872)K−branching fraction
• Charmonium: Comparison with experiment
• Observation of a New Narrow Charmonium State in Exclusive B+-->K+ pi+pi- J/psi Decays
• Review of Particle Physics

Cited by

• The Exotic XYZ Charmonium-Like Mesons
• Bound states of the heavy flavor vector mesons andY(4008)andZ1+(4050)