Hadronic structure functions in the $e^{+}{e}^{-}\to \bar{\Lambda }\Lambda$ reaction

Abstract

Cross-section distributions are calculated for the reaction $e^{+}{e}^{-}\to J/\psi \to \bar{\Lambda }(\to \bar{p}{\pi }^{+})\Lambda (\to p{\pi }^{-})$, and related annihilation reactions mediated by vector mesons. The hyperon-decay distributions depend on a number of structure functions that are bilinear in the, possibly complex, psionic form factors $G_M^{\psi }$ and $G_E^{\psi }$ of the Lambda hyperon. The relative size and relative phase of these form factors can be uniquely determined from the unpolarized joint-decay distributions of the Lambda and anti-Lambda hyperons. Also the decay-asymmetry parameters of Lambda and anti-Lambda hyperons can be determined.

arXiv comment4 pages, 3 figures

References in corpus (7)

• Design and Construction of the BESIII Detector
• Study of $J/\psi$ and $\psi (3686)$ decay to $\Lambda \bar{\Lambda }$ and ${\Sigma }^0{\bar{\Sigma }}^0$ final states
• The electromagnetic form factors of the $\Lambda$ in the timelike region
• Spin asymmetries and correlations in lambda-pair production through the radiative return method
• Polarization observables in the $e^{+}{e}^{-}\to \bar{\Lambda }\Lambda$ reaction
• Measurement of the asymmetry parameter for the decay $\bar{\Lambda }\to \bar{p}{\pi }^{+}$
• $CP$ Invariance Study of $J/\psi \to \Lambda \bar{\Lambda }$ and $\Lambda$ Nonpleptonic Decays in Helicity Frame

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