Search for New T′ Particles in Final States with Large Jet Multiplicities and Missing Transverse Energy in pp̅ Collisions at √s=1.96 TeV
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Aaltonen-2011-Letters-Search for New T0 Particles.pdf
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Author(s)
Gomez-Ceballos, Guillelmo
Bauer, Gerry P
Date Issued
November 2011
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaltonen, T. et al. “Search for New T^{′} Particles in Final States with Large Jet Multiplicities and Missing Transverse Energy in Pp[over ¯] Collisions at Sqrt[s]=1.96 TeV.” Physical Review Letters 107.19 (2011). © 2011 American Physical Society
Version
Final published version
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[superscript -1] of integrated luminosity of pp̅ 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, pp̅ →T′T̅ ′→tt̅ +XX̅ →bqq̅ b̅ qq̅ +XX̅ . 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′T̅ ′→tt̅ +XX̅ , excluding the fourth generation exotic quarks T′ at 95% confidence level up to mT′=400 GeV/c[superscript 2] for mX≤70 GeV/c[superscript 2].
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.107.191803
