Measurement of the e+e- --> b anti-b cross section between sqrt(S)=10.54 and 11.20 GeV

TL;DR

This paper presents precise measurements of the e+e- to b anti-b cross section across a specific energy range, providing insights into the properties of the Y(10860) and Y(11020) resonances.

Contribution

The study offers the first high-precision energy scan of the e+e- to b anti-b cross section in this energy range, refining resonance parameters.

Findings

Measured cross sections with 5% relative error

Resonance widths may be smaller than previously thought

Data can refine parameters of Y(10860) and Y(11020)

Abstract

We report e+e- --> b anti-b cross section measurements by the BABAR experiment performed during an energy scan in the range of 10.54 to 11.20 GeV at the PEP-II e+e- collider. A total relative error of about 5% is reached in more than three hundred center-of-mass energy steps, separated by about 5 MeV. These measurements can be used to derive precise information on the parameters of the Y(10860) and Y(11020) resonances. In particular we show that their widths may be smaller than previously measured.