Mostra el registre parcial de l'element

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.accessioned2020-05-19T15:33:29Z
dc.date.accessioned2023-10-02T06:35:10Z
dc.date.available2020-05-19T15:33:29Z
dc.date.available2023-10-02T06:35:10Z
dc.date.created2013
dc.date.issued2013-06
dc.identifier.urihttp://hdl.handle.net/20.500.14342/3335
dc.description.abstractThe differential branching fraction of the decay $\Lambda_b^0\rightarrow\Lambda\mu^+\mu^-$ is measured as a function of the square of the dimuon invariant mass, $q^2$. A yield of $78\pm12$ $\Lambda_b^0\rightarrow\Lambda\mu^+\mu^-$ decays is observed using data, corresponding to an integrated luminosity of 1.0\,fb$^{-1}$, collected by the LHCb experiment at a centre-of-mass energy of 7\,TeV. A significant signal is found in the $q^2$ region above the square of the $J/\psi$ mass, while at lower-$q^2$ values upper limits are set on the differential branching fraction. Integrating the differential branching fraction over $q^2$, while excluding the $J/\psi$ and $\psi(2S)$ regions, gives a branching fraction of $\BF($\Lambda_b^0\rightarrow\Lambda\mu^+\mu^-$)=(0.96\pm 0.16\stat\pm 0.13\syst\pm 0.21 (\mathrm{norm}))\times 10^{-6}$, where the uncertainties are statistical, systematic and due to the normalisation mode, $$\Lambda_b^0\rightarrow J/psi\Lambda$, respectively.eng
dc.format.extent11 p.cat
dc.language.isoengcat
dc.publisherElseviercat
dc.relation.ispartofPhysics Letters B, 2013, Vol. 725, No. 1-3 (Agost 2013)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.otherFísica--Mesuramentscat
dc.subject.otherFísica nuclear--Investigaciócat
dc.titleMeasurement of the differential branching fraction of the decay Λ0b → Λμ+ μ−cat
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.2013.06.060cat


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Mostra el registre parcial de l'element

Attribution-NonCommercial-NoDerivatives 4.0 International
Excepte que s'indiqui una altra cosa, la llicència de l'ítem es descriu com http://creativecommons.org/licenses/by-nc-nd/4.0/
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