Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/39882
Registo completo
Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Onofre, A. | por |
dc.contributor.author | Castro, Nuno Filipe Silva Fernandes | por |
dc.contributor.author | ATLAS Collaboration | - |
dc.date.accessioned | 2016-02-01T15:08:36Z | - |
dc.date.available | 2016-02-01T15:08:36Z | - |
dc.date.issued | 2015 | - |
dc.identifier.citation | Aad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., Aben, R., . . . Zwalinski, L. (2015). Measurement of spin correlation in top-antitop quark events and search for top squark pair production in pp collisions at s =8TeV using the ATLAS detector. Physical Review Letters, 114(14). doi: 10.1103/PhysRevLett.114.142001 | por |
dc.identifier.issn | 0031-9007 | - |
dc.identifier.uri | https://hdl.handle.net/1822/39882 | - |
dc.description.abstract | A measurement of spin correlation in tt¯ production is presented using data collected with the ATLAS detector at the Large Hadron Collider in proton-proton collisions at a center-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 20.3 fb−1. The correlation between the top and antitop quark spins is extracted from dilepton tt¯ events by using the difference in azimuthal angle between the two charged leptons in the laboratory frame. In the helicity basis the measured degree of correlation corresponds to Ahelicity=0.38±0.04, in agreement with the Standard Model prediction. A search is performed for pair production of top squarks with masses close to the top quark mass decaying to predominantly right-handed top quarks and a light neutralino, the lightest supersymmetric particle. Top squarks with masses between the top quark mass and 191 GeV are excluded at the 95% confidence level. | por |
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, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; 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, Netherlands; BRF and RCN, Norway; MNiSW and NCN, Poland; GRICES and FCT, Portugal; MNE/IFA, Romania; MES of Russia and ROSATOM, Russian Federation; JINR; MSTD, Serbia; MSSR, Slovakia; ARRS and MIZS, 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 acknowledged gratefully, in particular from CERN and the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), 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. | por |
dc.language.iso | eng | por |
dc.publisher | American Physical Society | por |
dc.relation | info:eu-repo/grantAgreement/FCT/3599-PPCDT/143069/PT | - |
dc.rights | openAccess | por |
dc.subject | Flavor physics | por |
dc.subject | Top physics | por |
dc.subject | Experimental results | por |
dc.title | Measurement of Spin Correlation in Top-Antitop Quark Events and Search for Top Squark Pair Production in pp Collisions at s√=8 TeV Using the ATLAS Detector | por |
dc.type | article | por |
dc.peerreviewed | yes | por |
sdum.publicationstatus | published | por |
oaire.citationIssue | 14 | por |
oaire.citationTitle | Physical Review Letters | por |
oaire.citationVolume | 114 | por |
dc.identifier.doi | 10.1103/PhysRevLett.114.142001 | por |
dc.subject.fos | Ciências Naturais::Ciências Físicas | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Physical Review Letters | por |
Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
ATLAS-20141216.pdf | 475,96 kB | Adobe PDF | Ver/Abrir |