Abstract
We present physics opportunities and topics with the ss̄ states (strangeonia) that can be studied with the BESIII detector operating at the BEPCII collider. Though the ϕ and η/η′ states have long been established experimentally, only a handful of strangeonia are well known, in contrast to the rich cc̄ charmoium system. An overview of the ss̄ states and their experimental status is presented in this paper. The BESIII experiment has collected the world's largest samples of J/ψ, ψ(2S), ψ(3770), and direct e+e− annihilations at energies below the J/ψ and above 3.8 GeV, and will continue to accumulate high quality, large integrated luminosity in the τ-charm energy region. These data, combined with the excellent performance of the BESIII detector, will offer unprecedented opportunities to explore the ss̄ system. In this paper we describe the experimental techniques to explore strangeonia with the BESIII detector.
Highlights
We present physics opportunities and topics with the ssstates that can be studied with the BESIII detector operating at the BEPCII collider
Half a century ago the quark model was introduced to describe the large array of hadrons, within which mesons are composed of qqbound together by the strong interaction and baryons consist of three quarks
Since the quark model has offered a useful tool in understanding the substructures of hadrons and led to the advent of Quantum Chromodynamics (QCD) for describing the strong interaction
Summary
Half a century ago the quark model was introduced to describe the large array of hadrons, within which mesons are composed of qqbound together by the strong interaction and baryons consist of three quarks. Within the framework of the relativistic quark model with QCD [1], a spectroscopy similar to heavy quarkonia is expected for strangeonium (ss) states. Their decays were studied in detail with the 3P0 model [2], which is a phenomelogical theory for describing light meson decays. We will review the experimental status of strangeonia, show the possible J/ψ and ψ′ decays best suited for the search and study of new strangeonia, and propose approaches to search for new strangeonium-like states similar to the charmonium-like states (X, Y , Z), which were discovered at the Babar, Belle and BESIII experiments. We identify the e+e− → (ss)(ss) interaction as an especially important data sample to reconstruct new ssmesons with high efficiency in a mode independent way
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