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Light meson decays at BESIII
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| Zeitschriftentitel: | EPJ Web of Conferences |
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| Personen und Körperschaften: | |
| In: | EPJ Web of Conferences, 199, 2019, S. 01023 |
| Format: | E-Article |
| Sprache: | Unbestimmt |
| veröffentlicht: |
EDP Sciences
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| Schlagwörter: |
| Zusammenfassung: | <jats:p>The BESIII experiment has accumulated the world’s largest data samples of 1.3 billion <jats:italic>J/ψ</jats:italic> events and 0.45 billion <jats:italic>ψ</jats:italic>(3686) events, which provide a unique opportunity to investigate light meson decays. The <jats:italic>η</jats:italic> and <jats:italic>η′</jats:italic> decays are sensitive tools for investigations of <jats:italic>π</jats:italic> − <jats:italic>π</jats:italic> and <jats:italic>η</jats:italic> − <jats:italic>π</jats:italic> interactions, symmetry breaking, and serve as a test of chiral perturbation theory. In recent years considerable results on <jats:italic>η</jats:italic> and <jats:italic>η′</jats:italic> decays were achieved at the BESIII experiment. In this proceeding, we present the significant progresses on amplitude analyses of Dalitz decays <jats:italic>η'</jats:italic> → 3<jats:italic>π</jats:italic>,<jats:italic>η'</jats:italic> → <jats:italic>ηππ</jats:italic>, and radiative decay <jats:italic>η'</jats:italic> → <jats:italic>γπ</jats:italic><jats:sup>+</jats:sup><jats:italic>π</jats:italic><jats:sup>−</jats:sup>, <jats:italic>η'</jats:italic> → <jats:italic>γγπ</jats:italic><jats:sup>0</jats:sup>. Additionally, the $a_0^0\left( {980} \right) - {f_0}\left( {980} \right)$ mixing is an important probe to the nature of those two lightest scalar mesons. The first observation of $a_0^0\left( {980} \right) - {f_0}\left( {980} \right)$ mixing is also presented, which will help to improve the understanding of the nature of $a_0^0\left( {980} \right)$ and <jats:italic>f</jats:italic><jats:sub>0</jats:sub>(980).</jats:p> |
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| Umfang: | 01023 |
| ISSN: |
2100-014X
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| DOI: | 10.1051/epjconf/201919901023 |