The results of searches for selectrons, charginos and neutralinos performed with the data collected by the ALEPH detector at LEP at centre-of-mass energies up to 209 GeV are interpreted in the framework of the Minimal Supersymmetric extension of the Standard Model with R-parity conservation. Under the assumptions of gaugino and sfermion mass unification and no sfermion mixing, an absolute lower limit of 73 GeV/c(2) is set on the mass of the lighter selectron (e) over tilde (R) at the 95% confidence level. Similarly, limits on the masses of the heavier selectron (e) over tilde (L) and of the sneutrino (nu) over tilde (e) are set at 107 and 84 GeV/c(2), espectively. Additional constraints are derived from the results of the searches for Higgs bosons. The results are also interpreted in the framework of minimal supergravity. (C) 2002 Elsevier Science B.V. All rights reserved.
Absolute lower limits on the masses of selectrons and sneutrinos in the MSSM
ROLANDI, LUIGI
2002
Abstract
The results of searches for selectrons, charginos and neutralinos performed with the data collected by the ALEPH detector at LEP at centre-of-mass energies up to 209 GeV are interpreted in the framework of the Minimal Supersymmetric extension of the Standard Model with R-parity conservation. Under the assumptions of gaugino and sfermion mass unification and no sfermion mixing, an absolute lower limit of 73 GeV/c(2) is set on the mass of the lighter selectron (e) over tilde (R) at the 95% confidence level. Similarly, limits on the masses of the heavier selectron (e) over tilde (L) and of the sneutrino (nu) over tilde (e) are set at 107 and 84 GeV/c(2), espectively. Additional constraints are derived from the results of the searches for Higgs bosons. The results are also interpreted in the framework of minimal supergravity. (C) 2002 Elsevier Science B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
