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DC Field | Value | Language |
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dc.contributor.author | Alfonso Albero, Alejandro | - |
dc.contributor.author | Calvo Gomez, M. | - |
dc.contributor.author | Camboni, Alessandro | - |
dc.contributor.author | Coquereau, Samuel | - |
dc.contributor.author | Garrido Beltrán, Lluís | - |
dc.contributor.author | Gascón Fora, David | - |
dc.contributor.author | Gironella Gironell, Pere | - |
dc.contributor.author | Graciani Díaz, Ricardo | - |
dc.contributor.author | Graugés Pous, Eugeni | - |
dc.contributor.author | Vazquez Gomez, R. | - |
dc.contributor.author | Marin Benito, Carla | - |
dc.contributor.author | LHCb Collaboration | - |
dc.date.accessioned | 2022-05-10T15:49:39Z | - |
dc.date.available | 2022-05-10T15:49:39Z | - |
dc.date.issued | 2018 | - |
dc.identifier.issn | 1126-6708 | - |
dc.identifier.uri | http://hdl.handle.net/2445/185500 | - |
dc.description.abstract | A measurement of Z → τ +τ − production cross-section is presented using data, corresponding to an integrated luminosity of 2 fb−1 , from pp collisions at √ s = 8 TeV collected by the LHCb experiment. The τ +τ − candidates are reconstructed in final states with the first tau lepton decaying leptonically, and the second decaying either leptonically or to one or three charged hadrons. The production cross-section is measured for Z bosons with invariant mass between 60 and 120 GeV/c2 , which decay to tau leptons with transverse momenta greater than 20 GeV/c and pseudorapidities between 2.0 and 4.5. The crosssection is determined to be σpp→Z→τ+τ− = 95.8 ± 2.1 ± 4.6 ± 0.2 ± 1.1 pb, where the first uncertainty is statistical, the second is systematic, the third is due to the LHC beam energy uncertainty, and the fourth to the integrated luminosity uncertainty. This result is compatible with NNLO Standard model predictions. The ratio of the cross-sections for Z → τ +τ − to Z → µ +µ − (Z → e +e −), determined to be 1.01 ± 0.05 (1.02 ± 0.06), is consistent with the lepton-universality hypothesis in Z decays. | - |
dc.format.extent | 19 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Springer Verlag | - |
dc.relation.isformatof | Reproducció del document publicat a: https://doi.org/10.1007/JHEP09(2018)159 | - |
dc.relation.ispartof | Journal of High Energy Physics, 2018, vol. 2018, num. 9, p. 1-19 | - |
dc.relation.uri | https://doi.org/10.1007/JHEP09(2018)159 | - |
dc.rights | cc-by (c) Alfonso Albero, Alejandro et al., 2018 | - |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Hadrons | - |
dc.subject.classification | Gran Col·lisionador d'Hadrons | - |
dc.subject.classification | Física de partícules | - |
dc.subject.classification | Experiments | - |
dc.subject.other | Hadrons | - |
dc.subject.other | Large Hadron Collider (France and Switzerland) | - |
dc.subject.other | Particle physics | - |
dc.subject.other | Experiments | - |
dc.title | Measurement of Z → τ + τ − production in proton-proton collisions at √s=8 TeV | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 684530 | - |
dc.date.updated | 2022-05-10T15:49:40Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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684530.pdf | 1.16 MB | Adobe PDF | View/Open |
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