A search for pair-production of long-lived, heavy, singly-charged particles has been performed with data collected by the ALEPH detector at a centre-of-mass energy of 172 GeV. Data at root s = 161, 136, and 130 GeV are also included to improve the sensitivity to lower masses. No candidate is found in the data. A model-independent 95% confidence level upper limit on the production cross section at 172 GeV of 0.2-0.4 pb is derived for masses between 45 and 86 GeV/c(2). This cross section limit implies, assuming the MSSM, a lower limit of 67 (69) GeV/c(2) on the mass of right- (left-) handed long-lived scalar taus or scalar muons and of 86 GeV/c(2) on the mass of long-lived charginos.

Search for pair-production of long-lived heavy charged particles in e(+)e(-) annihilation

G. Batignani;CIOCCI, MARIA AGNESE;FERRANTE, ISIDORO;MESSINEO, ALBERTO MARIA;TONELLI, GUIDO EMILIO;
1997-01-01

Abstract

A search for pair-production of long-lived, heavy, singly-charged particles has been performed with data collected by the ALEPH detector at a centre-of-mass energy of 172 GeV. Data at root s = 161, 136, and 130 GeV are also included to improve the sensitivity to lower masses. No candidate is found in the data. A model-independent 95% confidence level upper limit on the production cross section at 172 GeV of 0.2-0.4 pb is derived for masses between 45 and 86 GeV/c(2). This cross section limit implies, assuming the MSSM, a lower limit of 67 (69) GeV/c(2) on the mass of right- (left-) handed long-lived scalar taus or scalar muons and of 86 GeV/c(2) on the mass of long-lived charginos.
1997
Barate, R.; Buskulic, D.; Decamp, D.; Ghez, P.; Goy, C.; Lees, J. P.; Lucotte, A.; Minard, M. N.; Nief, J. Y.; Pietrzyk, B.; Casado, M. P.; Chmeissani...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/828735
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