Measurements of t(t)over-bar Spin Correlations and Top-Quark Polarization Using Dilepton Final States in pp Collisions at ?s=7 TeV

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dc.authoridEskut, Eda/0000-0001-8328-3314
dc.authoridSteggemann, Jan/0000-0003-4420-5510
dc.authoridVartak, Adish/0000-0003-1507-1365
dc.authoridPiperov, Stefan/0000-0002-9266-7819
dc.authoridSilvestris, Lucia/0000-0002-8985-4891
dc.authoridCavallari, Francesca/0000-0002-1061-3877
dc.authoridCreanza, Donato Maria/0000-0001-6153-3044
dc.contributor.authorChatrchyan, S.
dc.contributor.authorKhachatryan, V.
dc.contributor.authorSirunyan, A. M.
dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorBergauer, T.
dc.contributor.authorThe CMS Collaboration
dc.date.accessioned2025-03-07T20:13:01Z
dc.date.available2025-03-07T20:13:01Z
dc.date.issued2014
dc.departmentÇağ Üniversitesi
dc.description.abstractSpin correlations and polarization in the top quark-antiquark system are measured using dilepton final states produced in pp collisions at the LHC at root s = 7 TeV. The data correspond to an integrated luminosity of 5.0 fb(-1) collected with the CMS detector. The measurements are performed using events with two oppositely charged leptons (electrons or muons), a significant imbalance in transverse momentum, and two or more jets, where at least one of the jets is identified as originating from a b quark. The spin correlations and polarization are measured through asymmetries in angular distributions of the two selected leptons, unfolded to the parton level. All measurements are found to be in agreement with predictions of the standard model.
dc.description.sponsorshipBMWF and FWF (Austria); FNRS and FWO (Belgium); CNPq; CAPES; FAPERJ; FAPESP (Brazil); MES (Bulgaria); Direct For Mathematical & Physical Scien; Division Of Physics [0906479, 1314131] Funding Source: National Science Foundation; Division Of Physics; Direct For Mathematical & Physical Scien [1211067, 1205960, 1120138, 1151640, 1306951] Funding Source: National Science Foundation; STFC [ST/F007094/1, ST/J004901/1, ST/K003542/1, ST/I000305/1, ST/I003622/1, ST/K001604/1, ST/H00081X/2, ST/K001531/1, ST/K003844/1, PP/E002803/1, ST/L005603/1, ST/H000925/1, ST/H000925/2, ST/F006748/1, ST/K001639/1, ST/M002020/1, ST/L00609X/1, ST/G502347/1, ST/J005479/1, ST/I505572/1, ST/J004871/1, ST/J005665/1, ST/I005912/1, ST/L006340/1, ST/I002200/1, ST/I000410/1] Funding Source: UKRI
dc.description.sponsorshipWe would like to thank Professor W. Bernreuther and Professor Z.-G. Si for calculating the theoretical predictions of Fig. 1 and Table II for this Letter. We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staff at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centers and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CSF (Croatia); RPF (Cyprus); MoER, SF0690030s09 and ERDF (Estonia); Academy of Finland, MEC, and HIP ( Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of Korea); LAS (Lithuania); MOE and UM (Malaysia); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS, and RFBR (Russia); MESTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); ThEPCenter, IPST, STAR, and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (U. S.).
dc.identifier.doi10.1103/PhysRevLett.112.182001
dc.identifier.issn0031-9007
dc.identifier.issn1079-7114
dc.identifier.issue18
dc.identifier.pmid24856688
dc.identifier.urihttps://doi.org/10.1103/PhysRevLett.112.182001
dc.identifier.urihttps://hdl.handle.net/20.500.12507/2857
dc.identifier.volume112
dc.identifier.wosWOS:000336099800004
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherAmer Physical Soc
dc.relation.ispartofPhysical Review Letters
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20241226
dc.titleMeasurements of t(t)over-bar Spin Correlations and Top-Quark Polarization Using Dilepton Final States in pp Collisions at ?s=7 TeV
dc.typeArticle

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