Search for New T′ Particles in Final States with Large Jet Multiplicities and Missing Transverse Energy in pp̅ Collisions at √s=1.96 TeV
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 pai...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2012
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| Online Access: | http://hdl.handle.net/1721.1/71194 |
| Summary: | 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]. |
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