Search for the Production of Scalar Bottom Quarks in pp̅ Collisions at √s=1.96 TeV
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Aaltonen, Timo Antero; Adelman, Jahred; Álvarez González, Bárbara; Amerio, Silvia; Amidei, Dante; Anastassov, Anton; Annovi, Alberto; Antos, Jaroslav; Apollinari, Giorgio; Apresyan, Artur; Arisawa, Tetsuo; Casal Laraña, Bruno; Cuevas Maestro, Francisco Javier; Gómez Gramuglio, Gervasio; Rodrigo Anoro, Teresa


Date
2010-08-19Derechos
© 2010 American Physical Society
Publicado en
Physical Review Letters, vol. 105, iss. 8, art. num. 081802 (2010)
Publisher
American Physical Society
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Abstract:
We report on a search for direct scalar bottom quark (sbottom) pair production in pp̅ collisions at √s=1.96 TeV, in events with large missing transverse energy and two jets of hadrons in the final state, where at least one of the jets is required to be identified as originating from a b quark. The study uses a collider detector at Fermilab Run II data sample corresponding to 2.65 fb-1 of integrated luminosity. The data are in agreement with the standard model. In an R-parity conserving minimal supersymmetric scenario, and assuming that the sbottom decays exclusively into a bottom quark and a neutralino, 95% confidence-level upper limits on the sbottom pair production cross section of 0.1 pb are obtained. For neutralino masses below 70 GeV/c2, sbottom masses up to 230 GeV/c2 are excluded at 95% confidence level.
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