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dc.contributorUniversitat Ramon Llull. La Salle
dc.contributorCERN
dc.contributor.authorCalvo Gómez, Míriam
dc.contributor.authorCamboni, Alessandro
dc.contributor.authorVilasís Cardona, Xavier
dc.contributor.authorLHCb Collaboration - CERN
dc.date.accessioned2020-05-19T14:35:21Z
dc.date.accessioned2023-10-02T06:35:59Z
dc.date.available2020-05-19T14:35:21Z
dc.date.available2023-10-02T06:35:59Z
dc.date.created2012
dc.date.issued2012-08-14
dc.identifier.urihttp://hdl.handle.net/20.500.14342/3346
dc.description.abstractThe prompt production of the charmonium $\chi_{c1}$ and $\chi_{c2}$ mesons has been studied in proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of $\sqrt{s}=7$ TeV. The $\chi_c$ mesons are identified through their decays $\chi_c\to J/\psi\,\gamma$ with $J/\psi \to \mu^+ \mu^-$ using 36 $\mathrm{pb^{-1}}$ of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for the two $\chi_c$ spin states, $\sigma(\chi_{c2})/\sigma(\chi_{c1})$, has been determined as a function of the $J/\psi$ transverse momentum, $p_{\mathrm{T}}^{J/\psi}$, in the range from 2 to 15 GeV/$c$. The results are in agreement with the next-to-leading order non-relativistic QCD model at high $p_{\mathrm{T}}^{J/\psi}$ and lie consistently above the pure leading-order colour singlet predictioneng
dc.format.extent9 p.cat
dc.language.isoengcat
dc.publisherElseviercat
dc.relation.ispartofPhysics Letters, 2012, Vol. 714, No. 2-5 (Agost)cat
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights© CERN
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourceRECERCAT (Dipòsit de la Recerca de Catalunya)
dc.subject.otherGran col·lisionador d'hadrons (França i Suïssa)cat
dc.subject.otherMesonscat
dc.subject.otherProtonscat
dc.subject.otherFísica--Mesuramentscat
dc.subject.otherCol·lisions (Física nuclear)cat
dc.titleMeasurement of the cross-section ratio σ(χc2)/σ(χc1) for prompt χc production at √s=7TeVcat
dc.typeinfo:eu-repo/semantics/articlecat
dc.typeinfo:eu-repo/semantics/publishedVersioncat
dc.rights.accessLevelinfo:eu-repo/semantics/openAccess
dc.embargo.termscapcat
dc.subject.udc53
dc.identifier.doihttp://dx.doi.org/10.1016/j.physletb.2012.06.077cat


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Attribution-NonCommercial-NoDerivatives 4.0 International
Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by-nc-nd/4.0/
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