The cross-section of associated J/ψ-ψ(2S) production 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 for both J/ψ and ψ(2S) mesons having transverse momentum pT <14 GeV/cand rapidity 2.0 <4.5, assuming negligible polarisation of the J/ψ and ψ(2S) mesons. The production cross-section is measured to be 4.5 ±0.7 ±0.3 nb, where the first uncertainty is statistical and the second systematic. The differential cross-sections are measured as functions of several kinematic variables of the J/ψ-ψ(2S) candidates. The results are combined with a measurement of J/ψ-J/ψ production, giving a cross-section ratio between J/ψ-ψ(2S) and J/ψ-J/ψ production of 0.274 ±0.044 ±0.008, where the first uncertainty is statistical and the second systematic.

Measurement of associated J/ψ-ψ(2S) production cross-section in pp collisions at $$ \sqrt{s} $$ = 13 TeV / Null, N., Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., Adinolfi, M., Adlarson, P., Afsharnia, H., Agapopoulou, C., Aidala, C.A., Ajaltouni, Z., Akar, S., Akiba, K., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2024:5(2024). [10.1007/jhep05(2024)259]

Measurement of associated J/ψ-ψ(2S) production cross-section in pp collisions at $$ \sqrt{s} $$ = 13 TeV

Casse, G.;Sarti, A.;
2024

Abstract

The cross-section of associated J/ψ-ψ(2S) production 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 for both J/ψ and ψ(2S) mesons having transverse momentum pT <14 GeV/cand rapidity 2.0 <4.5, assuming negligible polarisation of the J/ψ and ψ(2S) mesons. The production cross-section is measured to be 4.5 ±0.7 ±0.3 nb, where the first uncertainty is statistical and the second systematic. The differential cross-sections are measured as functions of several kinematic variables of the J/ψ-ψ(2S) candidates. The results are combined with a measurement of J/ψ-J/ψ production, giving a cross-section ratio between J/ψ-ψ(2S) and J/ψ-J/ψ production of 0.274 ±0.044 ±0.008, where the first uncertainty is statistical and the second systematic.
2024
B Physics, Branching fraction, Charm Physics, Hadron-Hadron Scattering
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of associated J/ψ-ψ(2S) production cross-section in pp collisions at $$ \sqrt{s} $$ = 13 TeV / Null, N., Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., Adinolfi, M., Adlarson, P., Afsharnia, H., Agapopoulou, C., Aidala, C.A., Ajaltouni, Z., Akar, S., Akiba, K., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2024:5(2024). [10.1007/jhep05(2024)259]
File allegati a questo prodotto
File Dimensione Formato  
Aaij_measurement_2024.pdf

accesso aperto

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 914.75 kB
Formato Adobe PDF
914.75 kB Adobe PDF

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1720417
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 4
  • ???jsp.display-item.citation.isi??? 3
social impact