Next-to-leading-order QCD correction to the exclusive double charmonium production via $Z$ decays - INSPIRE

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Next-to-leading-order QCD correction to the exclusive double charmonium production via $Z$ decays

Xuan Luo
(
- Guizhou Minzu U., Guiyang
)
,
Hai-Bing Fu
(
- Guizhou Minzu U., Guiyang
)
,
Hai-Jiang Tian
(
- Guizhou Minzu U., Guiyang
)
,
Cong Li
(
- Guizhou Minzu U., Guiyang
)

Sep 19, 2022

8 pages

e-Print:

2209.08802 [hep-ph]

View in:

ADS Abstract Service

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Abstract: (arXiv)

In this paper, we preformed a further research on the exclusive productions of double charmonium via

Z

-boson decay by using nonrelativistic QCD factorizations approach, where the single-photon fragmentation topologies of the QED diagrams, the interference terms between the QCD and full QED diagrams, the next-to-leading-order calculations of the interference terms are preformed. For the production of

J/\psi+J/\psi

in

Z

-boson decay, the interference terms show a significantly phenomenological effect due to the addition of the newly calculated NLO QCD corrections. After adding together all contributions, the branching fraction

\mathcal{B}_{Z\to J/\psi J/\psi}

still undershoots the CMS collaboration data obviously. In addition, we simultaneously complete the next-to-leading-order calculations for

Z\to J/\psi+\eta_c (\chi_{cJ})

with

J=(0,1,2)

. The calculated results show that the newly-calculated complete QED and cross terms will have obvious effective on the total decay widths.

Note:

8 pages, 4 figures

charmonium: production
exclusive production
Z0: decay
quantum chromodynamics: correction
higher-order: 1
quantum chromodynamics: nonrelativistic
quantum chromodynamics: factorization
J/psi(3100): pair production
quantum electrodynamics
fragmentation

References(48)

Figures(0)

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