Efficiency Correction in the Branching Fraction Measurements of psi(2S) Hadronic Decays

TL;DR

This paper investigates efficiency corrections for particle identification and kinematic selection in psi(2S) hadronic decay measurements, providing preliminary results and testing the 12% rule predicted by perturbative QCD.

Contribution

It introduces a method for efficiency correction in psi(2S) decay measurements and applies it to multiple decay channels using BES data.

Findings

Preliminary branching fraction results for various decay channels.

Test of the 12% rule in psi(2S) decays.

Validation of efficiency correction methods.

Abstract

The detection efficiency correction for the particle identification and kinematic fit selection criteria is investigated for the branching fraciton measurements in the psi(2S) decays into omega pi pi, b1 pi, omega f2(1270), omega K K, omega p pbar, phi pi pi, phi f0(980), phi K K and phi p pbar final states using 4 millions psi(2S) data sample coolected at BEPC/BES. Based on the corrected efficiencies, the preliminary results of these decay channels have been obtained, and the "12%" rule predicted by perturbative QCD theory tested.