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Measurement of J/ψ-...
Measurement of J/ψ-pair production in pp collisions at √‾s = 13 TeV and study of gluon transverse-momentum dependent PDFs
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Aaij, R. (författare)
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- Adlarson, Patrik (författare)
- Uppsala universitet,Kärnfysik
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- Eklund, Lars (författare)
- Uppsala universitet,Kärnfysik
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- Kupsc, Andrzej (författare)
- Uppsala universitet,Kärnfysik
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- Ruiz Vidal, Joan (författare)
- Uppsala universitet,Institutionen för fysik och astronomi,Div Particle Phys, Dept Phys, Lund, Sweden
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- Zunica, G. (författare)
- Univ Manchester, Dept Phys & Astron, Manchester, England
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(creator_code:org_t)
- Springer, 2024
- 2024
- Engelska.
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Ingår i: Journal of High Energy Physics (JHEP). - : Springer. - 1126-6708 .- 1029-8479. ; :3
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The production cross-section of J/ψ pairs in proton-proton collisions at a centre-of-mass energy of s√ = 13 TeV is measured using a data sample corresponding to an integrated luminosity of 4.2 fb−1 collected by the LHCb experiment. The measurement is performed with both J/ψ mesons in the transverse momentum range 0 < pT < 14 GeV/c and rapidity range 2.0 < y < 4.5. The cross-section of this process is measured to be 16.36 ± 0.28 (stat) ± 0.88 (syst) nb. The contributions from single-parton scattering and double-parton scattering are separated based on the dependence of the cross-section on the absolute rapidity difference ∆y between the two J/ψ mesons. The effective cross-section of double-parton scattering is measured to be σeff = 13.1 ± 1.8 (stat) ± 2.3 (syst) mb. The distribution of the azimuthal angle ϕCS of one of the J/ψ mesons in the Collins-Soper frame and the pT-spectrum of the J/ψ pairs are also measured for the study of the gluon transverse-momentum dependent distributions inside protons. The extracted values of ⟨cos 2ϕCS⟩ and ⟨cos 4ϕCS⟩ are consistent with zero, but the presence of azimuthal asymmetry at a few percent level is allowed.
Ämnesord
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Nyckelord
- Hadron-Hadron Scattering
- Multi-Parton Interactions
- QCD
- Quarkonium
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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