Speaker
Description
The Belle and Belle II experiments have collected a $1.6~\mathrm{ab}^{-1}$ sample of $e^+e^-$ collision data at center-of-mass energies near the $\Upsilon(nS)$ resonances. These data include a $19.2~\mathrm{fb}^{-1}$ sample of data collected at center-of-mass energies near the $\Upsilon(10753)$ resonance. We present several results related to the following processes: $e^+ e^-\to h_b(1P)\eta$, $e^+ e^-\to\chi_{bJ}\omega$, $e^+ e^-\to\chi_{bJ}\gamma$, and $\Upsilon$ decays to di-baryons. In addition, we present a measurement of the $B^{0}$ and $B^+$ meson mass difference, and a search for $X(3872)$ in $B^+\to (\chi_{cJ}\pi^0)K^+$ decays. We also present a study of the tetraquark $T_{c\bar{c}}(4430)^+$ and a search for the $T_{c\bar{c}}(4430)^0$, and a first study of $pp$ femtoscopy in narrow $\Upsilon(nS)$ decays.
| Are you an early career researcher? | No |
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