Measurement of cross-section for $e^{+}{e}^{-}\to {\Xi }^{-}{\bar{\Xi }}^{+}$ near threshold at BESIII

Abstract

The Born cross-sections and effective form factors for process $e^{+}{e}^{-}\to {\Xi }^{-}{\bar{\Xi }}^{+}$ are measured at eight center-of-mass energies between 2.644 and 3.080 GeV, using a total integrated luminosity of 363.9 pb${}^{-1}$ $e^{+}{e}^{-}$ collision data collected with the BESIII detector at BEPCII. After performing a fit to the Born cross-section of $e^{+}{e}^{-}\to {\Xi }^{-}{\bar{\Xi }}^{+}$, no significant threshold effect is observed.

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• Probing the internal structure of baryons
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• First simultaneous measurement of ${\Xi }^0$ and ${\bar{\Xi }}^0$ asymmetry parameters in $\psi (3686)$ decay
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• Toy model to understand oscillatory behavior in timelike nucleon form factors
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• Determination of the ${\Sigma }^{+}$ Timelike Electromagnetic Form Factors
• Study of $e^{+}{e}^{-}\to {\Sigma }^0\overline{\Sigma }{}^0$ and ${\Sigma }^{+}\overline{\Sigma }{}^{-}$ by Initial State Radiation Method at Belle
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• Production and decay of polarized hyperon-antihyperon pairs
• Observation of $\psi (3686)\to \Xi (1530{)}^0\bar{\Xi }(1530{)}^0$ and $\Xi (1530{)}^0{\bar{\Xi }}^0$
• Higher strangeonium decays into light flavor baryon pairs like $\Lambda \bar{\Lambda }$, $\Sigma \bar{\Sigma }$, and $\Xi \bar{\Xi }$
• Compared analysis of time-like hyperon form factors
• The cross section of the process $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }$ in the vicinity of charmonium $\psi (3770)$ including three-gluon and $D$-meson loop contributions
• Unraveling the structure of $\Lambda$ hyperons with polarized $\Lambda \bar{\Lambda }$ pairs
• Accessing baryon-antibaryon generalized distribution amplitudes in $e^{\pm }\gamma \to e^{\pm }B\bar{B}$
• A description of charmonia decays $J/\psi \to B\bar{B}$ within the QCD factorisation framework