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Aug 16 – 21, 2019
Guilin Bravo Hotel, Guilin, China
Asia/Shanghai timezone

e+e- -> Upsilon(nS)pi+pi- scan and observation of e+e- -> gamma chi_c1 at Belle

Aug 20, 2019, 8:55 AM
20m
Golden Cassia (Guilin Bravo Hotel, Guilin, China)

Golden Cassia

Guilin Bravo Hotel, Guilin, China

14 South Ronghu Road, Xiangshan, Guilin 541002, Guangxi, China
Parallel Session 1: Meson spectroscopy Session 1: Meson spectroscopy

Speaker

Dr Simon Eidelman (Lebedev Physical Institute and Budker Institute)

Description

We report a new measurement of the $e^+e^-\to \Upsilon(nS)\pi^+\pi^-$ ($n=1,2,3$) cross sections at energies from 10.52 to 11.02 GeV, where we observe a new structure in the energy dependence of the cross sections and find evidence for the $\Upsilon(1S)\pi^+\pi^-$ production below the $B\bar{B}$ threshold. Along with this we also present observation of $e^+e^- \to \gamma \chi_{c1}$ and search for $e^+e^- \to \gamma \chi_{c0}$, $\gamma \chi_{c2}$ and $\gamma \eta_c$ at Belle. The results are based on the data sample collected by the Belle detector at the asymmetric energy $e^+e^-$ collider KEKB.

Primary author

Dr Simon Eidelman (Lebedev Physical Institute and Budker Institute)

Presentation materials