Charmonium pair production in ultraperipheral collision
Abstract We study the exclusive double charmonium $$(J/\psi {-} J/\psi $$ ( J / ψ - J / ψ and $$\eta _c {-} \eta _c)$$ η c - η c ) production through photon–photon fusion via ultraperipheral collision (UPC) at the HL-LHC and FCC with next-to-leading order (NLO) QCD predictions in the framework of no...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-07-01
|
| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-025-14542-x |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849234567228030976 |
|---|---|
| author | Hao Yang Zi-Qiang Chen Bingwei Long |
| author_facet | Hao Yang Zi-Qiang Chen Bingwei Long |
| author_sort | Hao Yang |
| collection | DOAJ |
| description | Abstract We study the exclusive double charmonium $$(J/\psi {-} J/\psi $$ ( J / ψ - J / ψ and $$\eta _c {-} \eta _c)$$ η c - η c ) production through photon–photon fusion via ultraperipheral collision (UPC) at the HL-LHC and FCC with next-to-leading order (NLO) QCD predictions in the framework of non-relativistic QCD (NRQCD). Numerical results indicate that the NLO corrections for $$J/\psi $$ J / ψ pair are large and negative, while positive for $$\eta _c$$ η c pair. The total cross section of $$J/\psi {-} J/\psi $$ J / ψ - J / ψ $$(\eta _c {-} \eta _c)$$ ( η c - η c ) in Pb–Pb UPC is 28.0 (65.1) nb at nucleon–nucleon c.m. energy $$\sqrt{s_{NN}} = 5.52$$ s NN = 5.52 TeV. Due to the backgrounds from various QCD interactions at UPC are highly suppressed and the event topologies for charmonium pair are easy to tag, the phenomenological studies at the LHC and FCC are feasible. The detailed transverse momentum $$p_T,$$ p T , diphoton invariant mass $$m_{\gamma \gamma }$$ m γ γ and the rapidity difference $$\Delta y$$ Δ y distributions are given. The production for X(6900) is also discussed. |
| format | Article |
| id | doaj-art-d22ac3eb75ee42e38b8d62650b894e14 |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-d22ac3eb75ee42e38b8d62650b894e142025-08-20T04:03:06ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522025-07-018571710.1140/epjc/s10052-025-14542-xCharmonium pair production in ultraperipheral collisionHao Yang0Zi-Qiang Chen1Bingwei Long2College of Physics, Sichuan UniversitySchool of Physics and Materials Science, Guangzhou UniversityCollege of Physics, Sichuan UniversityAbstract We study the exclusive double charmonium $$(J/\psi {-} J/\psi $$ ( J / ψ - J / ψ and $$\eta _c {-} \eta _c)$$ η c - η c ) production through photon–photon fusion via ultraperipheral collision (UPC) at the HL-LHC and FCC with next-to-leading order (NLO) QCD predictions in the framework of non-relativistic QCD (NRQCD). Numerical results indicate that the NLO corrections for $$J/\psi $$ J / ψ pair are large and negative, while positive for $$\eta _c$$ η c pair. The total cross section of $$J/\psi {-} J/\psi $$ J / ψ - J / ψ $$(\eta _c {-} \eta _c)$$ ( η c - η c ) in Pb–Pb UPC is 28.0 (65.1) nb at nucleon–nucleon c.m. energy $$\sqrt{s_{NN}} = 5.52$$ s NN = 5.52 TeV. Due to the backgrounds from various QCD interactions at UPC are highly suppressed and the event topologies for charmonium pair are easy to tag, the phenomenological studies at the LHC and FCC are feasible. The detailed transverse momentum $$p_T,$$ p T , diphoton invariant mass $$m_{\gamma \gamma }$$ m γ γ and the rapidity difference $$\Delta y$$ Δ y distributions are given. The production for X(6900) is also discussed.https://doi.org/10.1140/epjc/s10052-025-14542-x |
| spellingShingle | Hao Yang Zi-Qiang Chen Bingwei Long Charmonium pair production in ultraperipheral collision European Physical Journal C: Particles and Fields |
| title | Charmonium pair production in ultraperipheral collision |
| title_full | Charmonium pair production in ultraperipheral collision |
| title_fullStr | Charmonium pair production in ultraperipheral collision |
| title_full_unstemmed | Charmonium pair production in ultraperipheral collision |
| title_short | Charmonium pair production in ultraperipheral collision |
| title_sort | charmonium pair production in ultraperipheral collision |
| url | https://doi.org/10.1140/epjc/s10052-025-14542-x |
| work_keys_str_mv | AT haoyang charmoniumpairproductioninultraperipheralcollision AT ziqiangchen charmoniumpairproductioninultraperipheralcollision AT bingweilong charmoniumpairproductioninultraperipheralcollision |