Search for Direct Pair Production of Supersymmetric Top and Supersymmetric Bottom Quarks in $p \bar{p}$ Collisions at $\sqrt{s}$ = 1.96-TeV

Aaltonen, T.

doi:10.1103/PhysRevD.76.072010

Search for Direct Pair Production of Supersymmetric Top and Supersymmetric Bottom Quarks in $$p \bar{p}$$ Collisions at $$\sqrt{s}$$ = 1.96-TeV

Journal Article · Sun Jul 01 04:00:00 EDT 2007 · Phys.Rev.D

DOI:https://doi.org/10.1103/PhysRevD.76.072010· OSTI ID:1898779

Aaltonen, T.

We search for direct pair production of supersymmetric top quarks and supersymmetric bottom quarks in proton-antiproton collisions at sqrt(s) = 1.96 TeV, using 295 pb^-1 of data recorded by the Collider Detector at Fermilab (CDF II) experiment. The supersymmetric top (supersymmetric bottom) quarks are selected by reconstructing their decay into a charm (bottom) quark and a neutralino, which is assumed to be the lightest supersymmetric particle. The signature of such processes is two energetic heavy-flavor jets and missing transverse energy. The number of events that pass our selection for each search process is consistent with the standard model expectation. By comparing our results to the theoretical production cross sections of the supersymmetric top and supersymmetric bottom quarks in the minimal supersymmetric standard model, we exclude, at a 95% confidence level in the frame of that model, a supersymmetric top quark mass up to 132 GeV/c^2 for a neutralino mass of 48 GeV/c^2, and a supersymmetric bottom quark mass up to 193 GeV/c^2 for a neutralino mass of 40 GeV/c^2.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Contributing Organization:: CDF

DOE Contract Number:: AC02-07CH11359

OSTI ID:: 1898779

Report Number(s):: FERMILAB-PUB-07-383-E; arXiv:0707.2567; oai:inspirehep.net:756023

Journal Information:: Phys.Rev.D, Journal Name: Phys.Rev.D Vol. 76

Country of Publication:: United States

Language:: English

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