Shedding light on charmonium

Wang, Zhiguo; Li, Meijian; Li, Yang; Vary, James P.

doi:10.1103/PhysRevD.109.L031902

Shedding light on charmonium

Journal Article · Wed Feb 28 23:00:00 EST 2024 · Physical Review. D.

DOI:https://doi.org/10.1103/PhysRevD.109.L031902· OSTI ID:2316072

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We investigate E1 radiative transitions within charmonium in a relativistic approach based on light-front QCD. In quantum field theory, two sets of processes are pure E1: $χ_{c 0} \to J / ψ γ$ ( $ψ \to χ_{c 0} γ$ ) and $h_{c} \to η_{c} γ$ ( $η_{c}^{'} \to h_{c} γ$ ), both involving the $P$ -wave charmonia. We compute the E1 radiative decay widths as well as the corresponding transition form factors of various processes including those involving $2 P$ states. These observables provide an access to the microscopic structures of the $P$ -wave charmonium. We show that our parameter-free predictions are in excellent agreement with the experimental measurements as well as lattice simulations whenever available.

Published by the American Physical Society 2024

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Sponsoring Organization:: USDOE

Grant/Contract Number:: SC0023692

OSTI ID:: 2316072

Alternate ID(s):: OSTI ID: 2579486

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 3 Vol. 109; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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