Observation and properties of the orbitally excited B_{s2}* Meson

TL;DR

This paper reports the first direct observation of the orbitally excited B_{s2}* meson, measuring its mass and production rate, providing new insights into heavy meson spectroscopy.

Contribution

The study provides the first direct observation and precise measurements of the B_{s2}* meson’s mass and production rate in fully reconstructed decays.

Findings

Mass of B_{s2}* meson measured to be 5839.6 MeV/c^2

Production rate relative to B+ meson is 1.15%

First direct observation of this excited B_{s2}* state

Abstract

We report the direct observation of the excited L=1 state B_{s2}* in fully reconstructed decays to B+K-. The mass of the B_{s2}* meson is measured to be {5839.6 +- 1.1 (stat.) +- 0.7 (syst.) MeV/c^2, and its production rate relative to the B+ meson is measured to be [1.15 +- 0.23 (stat.) +- 0.13 (syst.)] %.