Inclusive Search for Anomalous Production of High-p_T Like-Sign Lepton Pairs in pp̅ Collisions at √s =1.8 TeV

Authors

Darin Acosta, University of FloridaFollow
Kenneth A. Bloom, University of Nebraska-LincolnFollow
Collider Detector at Fermilab Collaboration

Date of this Version

8-6-2004

Comments

Published by American Physical Society. Phys. Rev. Lett. 93, 061802 (2004). http://prl.aps.org. Copyright © 2004 American Physical Society. Permission to use.

Abstract

We report on a search for anomalous production of events with at least two charged, isolated, like-sign leptons, each with -p_T>11 GeV/c using a 107 pb^-1 sample of 1.8 TeV pp̅ collisions collected by the CDF detector. We define a signal region containing low background from standard model processes. To avoid bias, we fix the final cuts before examining the event yield in the signal region using control regions to test the Monte Carlo predictions. We observe no events in the signal region, consistent with an expectation of 0.63_-0.07^+0.84 events. We present 95% confidence level limits on new physics processes in both a signature-based context as well as within a representative minimal supergravity (tan β=3) model.