Belle II early physics program of bottomonium spectroscopy

TL;DR

This paper discusses the early physics program of the Belle II experiment focusing on bottomonium spectroscopy, outlining the planned data collection phases and potential studies at specific resonances.

Contribution

It proposes a detailed physics program for Belle II's early data runs, emphasizing bottomonium spectroscopy at various energy points.

Findings

Preparation for bottomonium studies at Belle II

Expected data collection at $S$ and $S$ resonances

Outline of early physics objectives and methods

Abstract

The Belle II experiment at the SuperKEKB collider is a major upgrade of the KEK "$B$ factory" facility in Tsukuba, Japan. Phase 1 commissioning of the main ring of SuperKEKB has started in February 2016 and first physics data will be recorded in 2017 during the so-called Phase 2 commissioning, when the partial Belle II detector will be operated still without its vertex detector. In 2018, the full Belle II detector will be rolled in and physics run will start. In this proceeding, a possible physics program for this early data run at different center-of-mass energies is described, in particular at the $\Upsilon(3S)$ and $\Upsilon(6S)$ resonances, amongst other energy points.