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Scientific article
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Search for New T′ Particles in Final States with Large Jet Multiplicities and Missing Transverse Energy in pp Collisions at s√=1.96  TeV

ContributorsCDF Collaboration
Published inPhysical review letters, vol. 107, no. 19, 191803
Publication date2011
Abstract

We present a search for a new particle T′ decaying to a top quark via T′→t+X, where X goes undetected. We use a data sample corresponding to 5.7  fb−1 of integrated luminosity of pp collisions with s√=1.96  TeV, collected at Fermilab Tevatron by the CDF II detector. Our search for pair production of T′ is focused on the hadronic decay channel, pp→T′T′→tt+XX→bqqbqq+XX. We interpret our results in terms of a model where T′ is an exotic fourth generation quark and X is a dark matter particle. The data are consistent with standard model expectations. We set a limit on the generic production of T′T′→tt+XX, excluding the fourth generation exotic quarks T′ at 95% confidence level up to mT′=400  GeV/c2 for mX≤70  GeV/c2.

Citation (ISO format)
CDF Collaboration. Search for New <em>T′</em> Particles in Final States with Large Jet Multiplicities and Missing Transverse Energy in <em>pp</em> Collisions at s√=1.96  TeV. In: Physical review letters, 2011, vol. 107, n° 19, p. 191803. doi: 10.1103/PhysRevLett.107.191803
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ISSN of the journal0031-9007
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