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  • Open Access

Shedding Light on Hadronization by Quarkonium Energy Correlator

An-Ping Chen1,*, Xiaohui Liu2,3,†, and Yan-Qing Ma4,5,‡

  • *Contact author: chenanping@jxnu.edu.cn
  • †Contact author: xiliu@bnu.edu.cn
  • ‡Contact author: yqma@pku.edu.cn
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Phys. Rev. Lett. 133, 191901 – Published 4 November, 2024

DOI: https://doi.org/10.1103/PhysRevLett.133.191901

Abstract

We propose to measure the energy correlator in quarkonium production, which tracks the energy deposited in the calorimeter at the χ-angular distance away from the identified quarkonium. The observable eliminates the need for jets while sustaining the perturbative predictive power. Analyzing the power correction to the energy correlator, we demonstrate that the novel observable supplies a unique gateway to probing the hadronization, especially when cosχ≳0 in the quarkonium rest frame, where the perturbative emissions are depleted due to the dead-cone effects. We expect the quarkonium energy correlator to add a new dimension to quarkonium studies.

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Phys. Rev. Lett. 133, 191901– Published 4 November, 2024
  • Received 22 May 2024
  • Revised 5 August 2024
  • Accepted 26 September 2024
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