Measurement of inclusive J/ψ pair production cross section in pp collisions at √s=13 TeV

作者：Acharya, S.; Adamova, D.; Adler, A.; Rinella, G. Aglieri; Agnello, M.; Agrawal, N.; Ahammed, Z.; Ahmad, S.; Ahn, S. U.; Ahuja, I.; Akindinov, A.; Al-Turany, M.; Aleksandrov, D.; Alessandro, B.; Alfanda, H. M.; Alfaro Molina, R.; Ali, B.; Alici, A.; Alizadehvandchali, N.; Alkin, A.; Alme, J.; Alocco, G.; Alt, T.; Altsybeev, I.; Anaam, M. N.; Andrei, C.; Andronic, A.; Anguelov, V.; Antinori, F.; Antonioli, P.; Apadula, N.; Aphecetche, L.; Appelshaeuser, H.; Arata, C.; Arcelli, S.; Aresti, M.

来源：Physical Review C - Nuclear Physics, 2023, 108(4): 045203.

DOI：10.1103/PhysRevC.108.045203

• DOUBLE PARTON SCATTERING
• PSI-PSI-PRODUCTION
• PROMPT J/PSI
• (P)OVER-BAR-P COLLISIONS
• QUARKONIUM PRODUCTION
• HADRON-COLLISIONS
• RAPIDITY
• EVENTS
• COLLIDER
• POLARIZATION

The production cross section of inclusive J/psi. pairs in pp collisions at a center-of-mass energy root s = 13 TeV is measured with ALICE. The measurement is performed for J/psi. in the rapidity interval 2.5 < y < 4.0 and for transverse momentum pT > 0. The production cross section of inclusive J/G. pairs is reported to be 10.3 +/- 2.3 (stat.) +/- 1.3 (syst.) nb in this kinematic interval. The contribution from nonprompt J/psi. (i.e., originated from beauty-hadron decays) to the inclusive sample is evaluated. The effective double-parton scattering cross section is computed, neglecting the single-parton scattering contribution.