Hadron Spectroscopy at Belle and Belle II

Sumitted to PubDB: 2023-10-14

Category: Talk, Visibility: Public

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Authors	Seongbae Yang
Date	Oct. 10, 2023
Belle II Number	BELLE2-TALK-CONF-2023-154
Abstract	Belle II, which commenced data acquisition in 2019, has already yielded research results in hadron spectroscopy. The $e^{+}e^{-}$ collision data, taken at or near the $\Upsilon(4S)$ resonance, are well-suited for studying hadrons with a high-performance detector system. In this presentation, we will show the latest research outcomes in hadron spectroscopy, including searches for the hidden bottom transitions between $\Upsilon(10753)$ and bottomonia, measurements of the energy dependence of the $e^{+}e^{-} \rightarrow B^{()}\bar{B}^{()}$ cross-section, and lifetime measurements of charmed hadrons. The talk also covers recent results from the Belle experiment, which ended operation in 2010. Notably, we will reveal a threshold cusp observed at the $\Lambda\eta$ threshold in the $pK^{-}$ system and new $\Lambda\pi$ signals observed near the $\bar{K}N$ mass threshold in the $\Lambda_{c}^{+}$ decays.
Conference	MENU2023