Erzincan Binali Yıldırım ÜniversitesiErzincan Binali Yıldırım ÜniversitesiAçık Erişim Arşivi · RDL Open

Search for anomalous tt̄ production in the highly-boosted all-hadronic final stat

ArticleAçık Erişim

Özet

A search is presented for a massive particle, generically referred to as a Z', decaying into a tt̄ pair. The search focuses on Z' resonances that are sufficiently massive to produce highly Lorentz-boosted top quarks, which yield collimated decay products that are partially or fully merged into single jets. The analysis uses new methods to analyze jet substructure, providing suppression of the non-top multijet backgrounds. The analysis is based on a data sample of proton-proton collisions at a center-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 5 fb-1. Upper limits in the range of 1 pb are set on the product of the production cross section and branching fraction for a topcolor Z' modeled for several widths, as well as for a Randall-Sundrum Kaluza-Klein gluon. In addition, the result contrain any enhancement in tt̄ production beyond expectations of the standard mode for tt invariant mass larger than 1TeV/c2.

Anahtar Kelimeler

Hadron-hadron scattering
RDL Kalıcı Bağlantı (PID)
https://rdlopen.rawdatalibrary.net/r/ebyu/15586Resmi atıflarda kullanılan kalıcı adres
DOI
https://doi.org/10.1007/jhep09(2012)029Yayıncı resmi DOI adresi
Tam Kayıt
AlanDeğerDil
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.authorDragicevic, M.
dc.contributor.authorErö, J.
dc.contributor.authorFabjan, C.
dc.contributor.authorFriedl, M.
dc.contributor.authorFrühwirth, R.
dc.contributor.authorGhete, V.M.
dc.contributor.authorHammer, J.
dc.contributor.authorHörmann, N.
dc.contributor.authorHrubec, J.
dc.contributor.authorJeitler, M.
dc.contributor.authorKiesenhofer, W.
dc.contributor.authorKrammer, M.
dc.contributor.authorLiko, D.
dc.contributor.authorMikulec, I.
dc.contributor.authorPernicka, M.
dc.contributor.authorRahbaran, B.
dc.contributor.authorRohringer, C.
dc.contributor.authorRohringer, H.
dc.contributor.authorSchöfbeck, R.
dc.contributor.authorStrauss, J.
dc.contributor.authorTaurok, A.
dc.contributor.authorTeischinger, F.
dc.contributor.authorWagner, P.
dc.contributor.authorWaltenberger, W.
dc.contributor.authorWalzel, G.
dc.contributor.authorWidl, E.
dc.contributor.authorWulz, C.-E.
dc.contributor.authorMossolov, V.
dc.contributor.authorShumeiko, N.
dc.contributor.authorSuarez Gonzalez, J.
dc.contributor.authorBansal, S.
dc.contributor.authorCerny, K.
dc.contributor.authorCornelis, T.
dc.contributor.authorDe Wolf, E.A.
dc.contributor.authorJanssen, X.
dc.contributor.authorLuyckx, S.
dc.contributor.authorMaes, T.
dc.contributor.authorMucibello, L.
dc.contributor.authorOchesanu, S.
dc.contributor.authorRoland, B.
dc.contributor.authorRougny, R.
dc.contributor.authorSelvaggi, M.
dc.contributor.authorVan Haevermaet, H.
dc.contributor.authorVan Mechelen, P.
dc.date.accessioned2026-10-18T20:30:26.356639308Z
dc.date.available2026-10-18T20:30:26.356639308Z
dc.date.issued2012
dc.description.abstractA search is presented for a massive particle, generically referred to as a Z', decaying into a tt̄ pair. The search focuses on Z' resonances that are sufficiently massive to produce highly Lorentz-boosted top quarks, which yield collimated decay products that are partially or fully merged into single jets. The analysis uses new methods to analyze jet substructure, providing suppression of the non-top multijet backgrounds. The analysis is based on a data sample of proton-proton collisions at a center-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 5 fb-1. Upper limits in the range of 1 pb are set on the product of the production cross section and branching fraction for a topcolor Z' modeled for several widths, as well as for a Randall-Sundrum Kaluza-Klein gluon. In addition, the result contrain any enhancement in tt̄ production beyond expectations of the standard mode for tt invariant mass larger than 1TeV/c2.
dc.description.sponsorshipNational Science Foundation, NSF, (0906479, 1100862, 1120138, 1205960, 1314131); National Science Foundation, NSF; Science and Technology Facilities Council, STFC, (PP/E002722/1, ST/F006748/1, ST/F007094/1, ST/F007434/1, ST/G502347/1, ST/G502412/1, ST/H000925/1, ST/I000410/1, ST/I002200/1, ST/I002839/1, ST/I005912/1, ST/I505572/1, ST/I505580/1, ST/J004820/1, ST/J004901/1, ST/J005614/1, ST/J005665/1, ST/K000616/1, ST/K001256/1, ST/K001604/1, ST/L001225/1); Science and Technology Facilities Council, STFC; Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, SNF, (123501, 134939); Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, SNF
dc.identifier.doi10.1007/jhep09(2012)029
dc.identifier.issn1126-6708
dc.identifier.issue9
dc.identifier.scopus2-s2.0-84867010735
dc.identifier.startpage29
dc.identifier.urihttps://rdlopen.rawdatalibrary.net/r/ebyu/15586
dc.identifier.volume2012
dc.language.isoen
dc.publisherSpringer Verlag
dc.relation.ispartofJournal of High Energy Physics
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectHadron-hadron scattering
dc.titleSearch for anomalous tt̄ production in the highly-boosted all-hadronic final stat
dc.typeArticle
dspace.entity.typePublication
rdl.citation.scopus59
rdl.oa.statusgold
rdl.source.indexSCOPUS