Search for pair production of scalar top quarks decaying to a τ lepton and a b quark in pp̄ collisions at s=1.96TeV

Search for pair production of scalar top quarks decaying to a τ lepton and a b quark in pp̄ collisions at s=1.96TeV

We search for pair production of supersymmetric top quarks (t1), followed by R-parity violating decay t1→τb with a branching ratio β, using 322pb-1 of pp̄ collisions at s=1.96TeV collected by the upgraded Collider Detector at Fermilab. Two candidate events pass our final selection criteria, consiste...

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Bibliographic Details
Main Authors: Aaltonen, T, Adelman, J, Akimoto, T, Albrow, MG, Álvarez González, B, Amerio, S, Amidei, D, Anastassov, A, Annovi, A, Antos, J, Aoki, M, Apollinari, G, Apresyan, A, Arisawa, T, Artikov, A, Ashmanskas, W, Attal, A, Aurisano, A, Azfar, F, Azzi-Bacchetta, P, Azzurri, P, Bacchetta, N, Badgett, W, Barbaro-Galtieri, A, Barnes, V
Format: Journal article
Language:English
Published: 2008
Description
Summary:We search for pair production of supersymmetric top quarks (t1), followed by R-parity violating decay t1→τb with a branching ratio β, using 322pb-1 of pp̄ collisions at s=1.96TeV collected by the upgraded Collider Detector at Fermilab. Two candidate events pass our final selection criteria, consistent with the standard model expectation. We set upper limits on the cross section σ(t1t̄1)×β2 as a function of the top-squark mass m(t1). Assuming β=1, we set a 95% confidence level limit m(t1)>153GeV/c2. The limits are also applicable to the case of a third-generation scalar leptoquark (LQ3) decaying LQ3→τb. © 2008 The American Physical Society.

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