4th generation searches at ATLAS

Abstract : The top-quark is the heaviest known fundamental particle with unique properties within the Standard Model. Its large couplings to the Higgs boson, and being the only quark that decays before hadronisation make it sensitive to new physics beyond the SM. A potential extension for the SM would be the adjonction a 4th family of heavy chiral fermions that could provide new sources of CP violation to explain the matter-antimatter asymmetry in the Universe, and allow for a heavier Higgs boson while remaining consistent with other precision electroweak studies. We report on searches for 4th generation quarks using the data sample recorded in 2011 at sqrt(s)=7 TeV centre-of-mass energy by the ATLAS experiment at the LHC.
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Conference papers
ICHEP2012- 36th International Conference for High Energy Physics, Jul 2012, Melbourne, Australia


http://hal.in2p3.fr/in2p3-00716815
Contributor : Danielle Cristofol <>
Submitted on : Wednesday, July 11, 2012 - 2:00:14 PM
Last modification on : Thursday, July 12, 2012 - 7:00:14 AM

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  • HAL Id : in2p3-00716815, version 1

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L. Feligioni. 4th generation searches at ATLAS. ICHEP2012- 36th International Conference for High Energy Physics, Jul 2012, Melbourne, Australia. <in2p3-00716815>

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