Abstract
We present the analysis of two-particle angular correlations using coordinate systems defined with the conventional beam axis and the event thrust axis. We propose the latter as a good representation for the correlation structure interpretation in the e+e− collision system. The e+e− collisions to hadronic final states at center-of-mass energies of \( \sqrt{s} \) = 10.52 GeV and 10.58 GeV are recorded by the Belle detector at KEKB. In this paper, results on the first dataset are supplementary to the previous Belle publication [1]. At the same time, the latter is the first two-particle correlation measurement at collision energy on the Υ(4S) resonance and is sensitive to its decay products. Measurements are reported as a function of the charged-particle multiplicity. Finally, a qualitative understanding of the correlation structure is discussed using a combination of Monte Carlo simulations and experimental data.
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The Belle collaboration., Chen, YC., Lee, YJ. et al. Two-particle angular correlations in e+e− collisions to hadronic final states in two reference coordinates at Belle. J. High Energ. Phys. 2023, 171 (2023). https://doi.org/10.1007/JHEP03(2023)171
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DOI: https://doi.org/10.1007/JHEP03(2023)171