Work

Production of J / ψ p p ¯ in electron-positron collisions

Year: 2025

Type: article

Abstract: The discoveries of the hidden-charm P c pentaquarks by the LHCb Collaboration have been not confirmed by other experiments yet. It is desirable to investigate the feasibility of observing them in other experiments. We present an order-of-magnitude estimate of the cross section of the e + e − → J / ψ p p ¯ process, where the hidden-charm pentaquarks may be searched for, and find it to be of O ( 4 fb ) when the e + e − c.m. energy is about between 6 and 7 GeV. The cross section for e + e − → P c p ¯ is then estimated to be ≲ O ( 0.1 pb ) . Thus, it is promising to search for P c at the future high-luminosity super tau-charm facilities with annual integrated luminosity about 1 ab − 1 . We also predict the branching fraction of Υ → J / ψ p p ¯ to be of O ( 2 × 10 − 6 ) , which can be tested at B factories.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2025.140007

Authors: Xiao-Yu Zhang, Yi-Lin Song, Feng-Kun Guo

Institutions: Chinese Academy of Sciences, Institute of Theoretical Physics, University of Chinese Academy of Sciences, Beihang University

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: National Natural Science Foundation of China, Chinese Academy of Sciences, Ministry of Science and Technology of the People's Republic of China, National Key Research and Development Program of China

Awards: G2188395147, G2330016983, G328816031, G8351509261, G8644667100