Search for anomalous tt̄ production in the highly-boosted all-hadronic final stat
Entity
UAM. Departamento de Física TeóricaPublisher
Springer Verlag; SISSA 2012Date
2012-09-11Citation
10.1007/JHEP09(2012)029
Journal of High Energy Physics 2012.9 (2012): 029
ISSN
1126-6708 (print); 1029-8479 (online)DOI
10.1007/JHEP09(2012)029Editor's Version
http://dx.doi.org/10.1007/JHEP09(2012)029Subjects
Hadron-hadron scattering; FísicaNote
Journal of High Energy Physics 2012.9 (2012): 029 reproduced by permission of Scuola Internazionale Superiore di Studi Avanzati (SISSA)Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM
Rights
© SISSA 2012Abstract
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/c 2
Files in this item
Google Scholar:The CMS collaboration
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Chatrchyan, S.
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Albajar Molera, Carmen
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Codispoti, G.
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Fernández Trocóniz Acha, Jorge
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