We report a search for the anomalous production of events with multiple charged leptons in p (p) over bar collisions at root s = 1.96 TeV using a data sample corresponding to an integrated luminosity of 346 pb(-1) collected by the CDF II detector at the Fermilab Tevatron. The search is divided into three-lepton and four-or-more-lepton data samples. We observe six events in the three-lepton sample and zero events in the >= 4-lepton sample. Both numbers of events are consistent with standard model background expectations. Within the framework of an R-parity-violating supergravity model, the results are interpreted as mass limits on the lightest neutralino (chi(0)(1)) and chargino (chi(+/-)(1)) particles. For one particular choice of model parameters, the limits are M(chi(0)(1))> 110 GeV/c(2) and M(chi(+/-)(1))> 203 GeV/c(2) at 95% confidence level; the variation of these mass limits with model parameters is presented.

A., A., J., A., T., A., T., A., M. G., A., D., A., et al. (2007). Search for anomalous production of multilepton events in p(p)over-bar- collisions at root s=1.96 TeV. PHYSICAL REVIEW LETTERS, 98(13), 131804-1-131804-7 [10.1103/PhysRevLett.98.131804].

Search for anomalous production of multilepton events in p(p)over-bar- collisions at root s=1.96 TeV

CIOCCI, MARIA AGNESE;
2007

Abstract

We report a search for the anomalous production of events with multiple charged leptons in p (p) over bar collisions at root s = 1.96 TeV using a data sample corresponding to an integrated luminosity of 346 pb(-1) collected by the CDF II detector at the Fermilab Tevatron. The search is divided into three-lepton and four-or-more-lepton data samples. We observe six events in the three-lepton sample and zero events in the >= 4-lepton sample. Both numbers of events are consistent with standard model background expectations. Within the framework of an R-parity-violating supergravity model, the results are interpreted as mass limits on the lightest neutralino (chi(0)(1)) and chargino (chi(+/-)(1)) particles. For one particular choice of model parameters, the limits are M(chi(0)(1))> 110 GeV/c(2) and M(chi(+/-)(1))> 203 GeV/c(2) at 95% confidence level; the variation of these mass limits with model parameters is presented.
A., A., J., A., T., A., T., A., M. G., A., D., A., et al. (2007). Search for anomalous production of multilepton events in p(p)over-bar- collisions at root s=1.96 TeV. PHYSICAL REVIEW LETTERS, 98(13), 131804-1-131804-7 [10.1103/PhysRevLett.98.131804].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11365/36994
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