Search for a heavy resonance decaying to a top quark and a vector-like top quark at √s=13 TeV
A search is presented for massive spin-1 Z0 resonances decaying to a top quark and a heavy vector-like top quark partner T. The search is based on a 2.6 fb−1 sample of proton-proton collisions at 13 TeV collected with the CMS detector at the LHC. The analysis is optimized for final states in wh...
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| Main Authors: | , , , , , |
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| 格式: | Article |
| 语言: | English English |
| 出版: |
Elsevier
2017
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| 主题: | |
| 在线阅读: | http://irep.iium.edu.my/63056/1/63056_Search%20for%20a%20heavy%20resonance%20decaying%20_article.pdf http://irep.iium.edu.my/63056/2/63056_Search%20for%20a%20heavy%20resonance%20decaying%20_scopus.pdf http://irep.iium.edu.my/63056/ https://link.springer.com/content/pdf/10.1007%2FJHEP09%282017%29053.pdf |
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| 总结: | A search is presented for massive spin-1 Z0
resonances decaying to a top quark
and a heavy vector-like top quark partner T. The search is based on a 2.6 fb−1
sample
of proton-proton collisions at 13 TeV collected with the CMS detector at the LHC. The
analysis is optimized for final states in which the T quark decays to a W boson and a bottom
quark. The focus is on all-jet final states in which both the W boson and the top quark
decay into quarks that evolve into jets. The decay products of the top quark and of the W
boson are assumed to be highly Lorentz-boosted and cannot be reconstructed as separate
jets, but are instead reconstructed as merged, wide jets. Techniques for the identification
of jet substructure and jet flavour are used to distinguish signal from background events.
Several models for Z0 bosons decaying to T quarks are excluded at 95% confidence level,
with upper limits on the cross section ranging from 0.13 to 10 pb, depending on the chosen
hypotheses. This is the first search for a neutral spin-1 heavy resonance decaying to a top
quark and a vector-like T quark in the all-hadronic final state |
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