Exclusive dimuon production and coherent charmonium photoproduction at forward rapidity in ultra-peripheral Pb–Pb collisions at √(s_NN)=5.36 TeV

@article{collaboration2026exclusive,
  title = {{Exclusive dimuon production and coherent charmonium photoproduction at forward rapidity in ultra-peripheral Pb–Pb collisions at $$\sqrts_\textNN=5.36$$ TeV}},
  author = {The ALICE collaboration and D. A. H. Abdallah and I. J. Abualrob and S. Acharya and K. Agarwal and G. Aglieri Rinella and L. Aglietta and N. Agrawal and Z. Ahammed and S. Ahmad and I. Ahuja and Z. Akbar and V. Akishina and M. Al-Turany and B. Alessandro and A. R. Alfarasyi and R. Alfaro Molina and B. Ali and A. Alici and J. Alme and G. Alocco and T. Alt and I. Altsybeev and C. Andrei and N. Andreou and A. Andronic and M. Angeletti and V. Anguelov and F. Antinori and P. Antonioli and N. Apadula and H. Appelshäuser and S. Arcelli and R. Arnaldi and I. C. Arsene and M. Arslandok and A. Augustinus and R. Averbeck and M. D. Azmi and B. Kong and H. Baba and A. R. J. Babu and A. Badalà and J. Bae and Y. Bae and Y. W. Baek and X. Bai and R. Bailhache and Y. Bailung and R. Bala and A. Baldisseri and B. Balis and S. Bangalia and K. Barai and V. Barbasova and F. Barile and L. Barioglio and M. Barlou and B. Barman and G. G. Barnaföldi},
  journal = {Journal of High Energy Physics},
  year = {2026},
  month = oct,
  doi = {10.1007/jhep10(2026)057},
  url = {https://link.springer.com/10.1007/JHEP10(2026)057},
  note = {CC BY 4.0},
}

TY  - JOUR
TI  - Exclusive dimuon production and coherent charmonium photoproduction at forward rapidity in ultra-peripheral Pb–Pb collisions at √(s_NN)=5.36 TeV
AU  - The ALICE collaboration
AU  - D. A. H. Abdallah
AU  - I. J. Abualrob
AU  - S. Acharya
AU  - K. Agarwal
AU  - G. Aglieri Rinella
AU  - L. Aglietta
AU  - N. Agrawal
AU  - Z. Ahammed
AU  - S. Ahmad
AU  - I. Ahuja
AU  - Z. Akbar
AU  - V. Akishina
AU  - M. Al-Turany
AU  - B. Alessandro
AU  - A. R. Alfarasyi
AU  - R. Alfaro Molina
AU  - B. Ali
AU  - A. Alici
AU  - J. Alme
AU  - G. Alocco
AU  - T. Alt
AU  - I. Altsybeev
AU  - C. Andrei
AU  - N. Andreou
AU  - A. Andronic
AU  - M. Angeletti
AU  - V. Anguelov
AU  - F. Antinori
AU  - P. Antonioli
AU  - N. Apadula
AU  - H. Appelshäuser
AU  - S. Arcelli
AU  - R. Arnaldi
AU  - I. C. Arsene
AU  - M. Arslandok
AU  - A. Augustinus
AU  - R. Averbeck
AU  - M. D. Azmi
AU  - B. Kong
AU  - H. Baba
AU  - A. R. J. Babu
AU  - A. Badalà
AU  - J. Bae
AU  - Y. Bae
AU  - Y. W. Baek
AU  - X. Bai
AU  - R. Bailhache
AU  - Y. Bailung
AU  - R. Bala
AU  - A. Baldisseri
AU  - B. Balis
AU  - S. Bangalia
AU  - K. Barai
AU  - V. Barbasova
AU  - F. Barile
AU  - L. Barioglio
AU  - M. Barlou
AU  - B. Barman
AU  - G. G. Barnaföldi
PY  - 2026
DA  - 2026/10/05
JO  - Journal of High Energy Physics
DO  - 10.1007/jhep10(2026)057
UR  - https://link.springer.com/10.1007/JHEP10(2026)057
AB  - A bstract : This Paper presents rapidity-differential measurements of coherent J /ψ and ψ (2S) photoproduction, as well as rapidity- and mass-differential measurements of exclusive dimuon production, in the forward rapidity region −4 < y < −2 . 5 in ultra-peripheral Pb–Pb collisions at √(s_NN)=5.36 TeV using data recorded by the ALICE detector at the LHC in 2023, corresponding to an integrated luminosity of ℒ = 1170 ± 50 μ b − 1 . The J /ψ and ψ (2S) results reveal the significant role of nuclear shadowing effects. The square root of the ratio of the measured quarkonium cross section to the impulse approximation prediction is about 0.76 for J /ψ and 0.71 for ψ (2S), at y ≈ −3, corresponding to typical Bjorken- x values of 10 − 2 . The exclusive dimuon results highlight the sensitivity of such measurements to precise modeling of the photon flux, particularly at impact parameters near the nuclear radius.
SN  - 1029-8479
ER  -