\Upsilon (5S) Results from Belle: Strange Beauty and Other Beasts

TL;DR

The Belle experiment's mbda(5S) data provides new insights into B_s meson decays, including the first baryonic decay observation and novel measurements of bottomonium states, advancing understanding of heavy meson physics.

Contribution

This paper reports the first observation of baryonic B_s decay, new measurements of mbda(5S) properties, and discovery of charged bottomonium-like states, utilizing extensive mbda(5S) data from Belle.

Findings

First observation of baryonic B_s decay

Measurement of mbda(5S)  and  states

Observation of charged bottomonium-like states

Abstract

The B-factories have successfully exploited the unique advantages of the \Upsilon(4S) resonance to study many aspects of the B_d and B_u mesons. The \Upsilon(10860) resonance, also known as \Upsilon(5S), is above mass threshold for the B_s and shares many of the same advantages. The Belle experiment has collected more than 120/fb at the \Upsilon(5S), corresponding to 7.9 million B_s events. First results from these data are presented, including the first observation of a baryonic decay of B_s, a novel measurement of sin 2\phi_1, and observation of h_b(1P), h_b(2P), and two charged bottomonium-like states.