Search for Pair Production of Supersymmetric Top Quarks in Dilepton Events from $$p\bar{p}$$ Collisions at $$\sqrt{s}$$ = 1.96 TeV
We present the results of a search for pair production of the supersymmetric partner of the top quark (the stop quark {approx}{sub 1}) decaying to a b-quark and a chargino {tilde {chi}}{sub 1}{sup {+-}} with a subsequent {tilde {chi}}{sub 1}{sup {+-}} decay into a neutralino {tilde {chi}}{sub 1}{sup 0}, lepton {ell}, and neutrino {nu}. Using a data sample corresponding to 2.7 fb{sup -1} of integrated luminosity of p{bar p} collisions at {radical}s = 1.96 TeV collected by the CDF II detector, we reconstruct the mass of candidate stop events and fit the observed mass spectrum to a combination of standard model processes and stop quark signal. We find no evidence for {tilde t}{sub 1}{bar {tilde t}}{sub 1} production and set 95% C.L. limits on the masses of the stop quark and the neutralino for several values of the chargino mass and the branching ratio {Beta}({tilde {chi}}{sub 1}{sup {+-}} {yields} {tilde {chi}}{sub 1}{sup 0}{ell}{sup {+-}}{nu}).
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 970075
- Report Number(s):
- FERMILAB-PUB-09-614-E; arXiv eprint number arXiv:0912.1308; TRN: US1000737
- Country of Publication:
- United States
- Language:
- English
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