Resonances in $e^+e^-$ annihilation near 2.2 GeV

The BABAR Collaboration

arXiv:1912.04512·hep-ex·February 4, 2020

Resonances in $e^+e^-$ annihilation near 2.2 GeV

The BABAR Collaboration

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TL;DR

This study measures the $e^+e^- o K_S K_L$ cross section using initial-state radiation with BABAR data, revealing resonance structures near 2.2 GeV and analyzing their nature in conjunction with other channels.

Contribution

It provides new measurements of the $e^+e^- o K_S K_L$ cross section and investigates resonance structures near 2.2 GeV using combined BABAR data and previous results.

Findings

01

Resonance structures observed near 2.2 GeV in $e^+e^- o K_S K_L$.

02

Combined analysis suggests possible resonance contributions.

03

Enhanced understanding of vector meson resonances in this energy region.

Abstract

Using the initial-state radiation method, the $e^{+} e^{-} \to K_{S} K_{L}$ cross section from 1.98 to 2.54 GeV is measured in a data sample of 469 fb $^{- 1}$ collected with the BABAR detector. The results are used in conjunction with previous BABAR results for the $e^{+} e^{-} \to K^{+} K^{-}$ , $e^{+} e^{-} \to π^{+} π^{-}$ , $e^{+} e^{-} \to π^{+} π^{-} η$ , and $e^{+} e^{-} \to ω π π$ cross sections to investigate the nature of the resonance structure recently observed by the BESIII experiment in the $e^{+} e^{-} \to K^{+} K^{-}$ cross section.

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