Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/109263| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Santos, S. P. Amor dos | - |
| dc.contributor.author | Carvalho, J. | - |
| dc.contributor.author | Fiolhais, M. C. N. | - |
| dc.contributor.author | Galhardo, B. | - |
| dc.contributor.author | Veloso, F. | - |
| dc.contributor.author | Wolters, H. | - |
| dc.contributor.author | ATLAS Collaboration | - |
| dc.date.accessioned | 2023-10-06T09:50:59Z | - |
| dc.date.available | 2023-10-06T09:50:59Z | - |
| dc.date.issued | 2015 | - |
| dc.identifier.uri | https://hdl.handle.net/10316/109263 | - |
| dc.description.abstract | An observation of the Λb 0→ψ(2S)Λ0 decay and a comparison of its branching fraction with that of the Λb 0→J/ψΛ0 decay has been made with the ATLAS detector in proton–proton collisions at s=8 TeV at the LHC using an integrated luminosity of 20.6 fb−1. The J/ψ and ψ(2S) mesons are reconstructed in their decays to a muon pair, while the Λ0→pπ− decay is exploited for the Λ0 baryon reconstruction. The Λb 0 baryons are reconstructed with transverse momentum pT>10 GeV and pseudorapidity |η|<2.1. The measured branching ratio of the Λb 0→ψ(2S)Λ0 and Λb 0→J/ψΛ0 decays is Γ(Λb 0→ψ(2S)Λ0)/Γ(Λb 0→J/ψΛ0)=0.501±0.033(stat)±0.019(syst), lower than the expectation from the covariant quark model. | pt |
| dc.description.sponsorship | We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Ar-menia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbai-jan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COL-CIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Repub-lic; DNRF, DNSRC and Lundbeck Foundation, Denmark; EPLANET, ERC and NSRF, European Union; IN2P3-CNRS, CEA-DSM/IRFU, France; GNSF, Georgia; BMBF, DFG, HGF, MPG and AvH Foundation, Germany; GSRT and NSRF, Greece; RGC, Hong Kong SAR, China; ISF, MINERVA, GIF, I-CORE and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; FOM and NWO, Nether-lands; BRF and RCN, Norway; MNiSW and NCN, Poland; GRICES and FCT, Portugal; MNE/IFA, Romania; MES of Russia and NRC KI, Russian Federation; JINR; MSTD, Serbia; MSSR,Slovakia; ARRS and MIZŠ, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC and Wallenberg Foundation, Sweden; SER, SNSF and Cantons of Bern and Geneva, Switzerland; NSC, Taiwan; TAEK, Turkey; STFC, the Royal Society and Leverhulme Trust, United Kingdom; DOE and NSF, United States of America. The crucial computing support from all WLCG partners is ac-knowledged gratefully, in particular from CERN and the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Swe-den), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA) and in the Tier-2 facilities worldwide. | pt |
| dc.language.iso | eng | pt |
| dc.publisher | Elsevier | pt |
| dc.rights | openAccess | pt |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | pt |
| dc.title | Measurement of the branching ratio Γ(Λb 0→ψ(2S)Λ0)/Γ(Λb 0→J/ψΛ0) with the ATLAS detector | pt |
| dc.type | article | - |
| degois.publication.firstPage | 63 | pt |
| degois.publication.lastPage | 80 | pt |
| degois.publication.title | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | pt |
| dc.peerreviewed | yes | pt |
| dc.identifier.doi | 10.1016/j.physletb.2015.10.009 | pt |
| degois.publication.volume | 751 | pt |
| dc.date.embargo | 2015-01-01 | * |
| uc.date.periodoEmbargo | 0 | pt |
| item.grantfulltext | open | - |
| item.cerifentitytype | Publications | - |
| item.languageiso639-1 | en | - |
| item.openairetype | article | - |
| item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
| item.fulltext | Com Texto completo | - |
| crisitem.author.researchunit | CFisUC – Center for Physics of the University of Coimbra | - |
| crisitem.author.researchunit | LIP – Laboratory of Instrumentation and Experimental Particle Physics | - |
| crisitem.author.researchunit | LIP – Laboratory of Instrumentation and Experimental Particle Physics | - |
| crisitem.author.orcid | 0000-0002-3015-7821 | - |
| crisitem.author.orcid | 0000-0002-9588-1773 | - |
| Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais | |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| 1-s2.0-S0370269315007601-main.pdf | 1.45 MB | Adobe PDF | View/Open |
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