BEEC2.0: An Upgraded Version for the Production of Heavy Quarkonium at Electron-positron Collider

TL;DR

BEEC2.0 is an upgraded event generator that simulates heavy quarkonium production at electron-positron colliders, now including polarized beams and 2S-wave states, aiding future collider feasibility studies.

Contribution

The paper introduces BEEC2.0, enhancing the original generator with polarized beam simulation and 2S-wave state production capabilities, expanding its applicability for collider physics research.

Findings

Inclusion of polarized beam simulation.

Addition of 2S-wave state production.

Enhanced tool for collider feasibility studies.

Abstract

The event generator BEEC [Z. Yang, X.G. Wu and X.Y. Wang, Comput. Phys. Commun. 184, 2848 (2013)] was devoted to the simulation of heavy quarkonium production at an unpolarized electron-positron collider. We upgraded it here by adding the generation of quarkonium with polarized electron and positron beams. In addition, the production of color-singlet 2S-wave states were included. Several future electron-positron colliders with high luminosity have been under discussion in the past decade. Especially, their possibility of producing polarized beams is important for providing more insights into the underlying physics. This upgraded version offers a useful tool for the feasibility study on quarkonium from the experimental side.