Abstract
The BESIII collaboration has collected a sample of 1.311 billion J/ψ events since 2009. In this talk, we will introduce four recent analyses on light meson spec-troscopy at BESIII, including two studies on the X (1835) and two partial wave analyses that are related to searching for and studying glueball candidates.
Highlights
Quantum Chromodynamics is one of the fundamental theories in modern high energy physics
We will introduce some recent results from BESIII that are related to light meson spectroscopy
We find that a simple Breit-Wigner function cannot describe the X(1835) line shape near the ppmass threshold (Fig. 3(a))
Summary
Quantum Chromodynamics is one of the fundamental theories in modern high energy physics. The BESIII detector collected 225 million J/ψ events in 2009 and 1.086 billion J/ψ events in 2012, which gives us a very good opportunity to study light mesons through J/ψ decays. The state X(1835) was first observed by the BESII experiment as a peak in the η π+π− invariant mass distribution in J/ψ → γη π+π− decays [1] This observation was later confirmed by BESIII studies of Γ the same process [2] with = 190 ± 9+−3386 MeV/c2. MeV/c2 and proton-antiproton (pp) mass threshold, dubbed X(pp), was first observed by BESII in J/ψ → γppdecays [3]; this observation was confirmed by BESIII [4] and CLEO [5] This enhancement structure was subsequently determined to have spin-parity JP = 0− by BESIII [6]. Present statistics do not allow us to conclusively determine if the X(1560) is the same state as the η(1405)/η(1475) or a new meson
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
