Cross sections for the reactions e⁺e^-→ K⁺K^-π⁺π^-(π⁰), K⁺K^-K⁺K^-(π⁰), π⁺π^-π⁺π^-(π⁰), ppπ⁺π^-(π⁰) in the energy region between 3.773 and 4.600 GeV

2021/09/28 by M. Ablikim, М. Н. Ачасов, M. N. Achasov +512
Chemistry · Mathematics · Physics and Astronomy · #Chemistry #Crystallography #Electron–positron annihilation #Energy (signal processing) #Geometry #Hadron #High-Energy Particle Collisions Research #Mathematics #Particle physics #Particle physics theoretical and experimental studies #Physics #Pi #Pi interaction #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Stereochemistry #hep-ex

paper · pdf · doi:10.1103/physrevd.104.112009

openalex publication_date 2021/09/28 · openalex created_date 2021/10/11 · arxiv created 2021/12/02 · arxiv updated 2022/01/12 · openalex updated_date 2026/08/05

Abstract

Using the data samples collected in the energy range from 3.773 to 4.600 GeV with the BESIII detector at the BEPCII collider, we measure the dressed cross sections as a function of center-of-mass energy for e⁺e^-→ K⁺K^-π⁺π^-(π⁰), K⁺K^-K⁺K^-(π⁰), π⁺π^-π⁺π^-(π⁰), and ppπ⁺π^-(π⁰). The cross sections for e⁺e^-→ K⁺K^-K⁺K^-π⁰, ppπ⁺π^-(π⁰) are the first measurements. Cross sections for the other five channels are much more precise than previous results in this energy region. We also search for charmonium and charmonium-like resonances, such as the Y(4230), decaying into the same final states. We find evidence of the ψ(4040) decaying to π⁺π^-π⁺π^-π⁰ with a statistical significance of 3.6σ. Upper limits are provided for other decays since no clear signals are observed.

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