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 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/c2. This cross section limit implies, assuming the MSSM, a lower limit of 67 (69) GeV/c2 on the mass of right- (left-) handed long-lived scalar taus or scalar muons and of 86 GeV/c2 on the mass of long-lived charginos.

Search for pair-production of long-lived heavy charged particles in e+e− annihilation / R Barate, D Buskulic, D Decamp, P Ghez, C Goy, J.-P Lees, A Lucotte, M.-N Minard, J.-Y Nief, B Pietrzyk, M.P Casado, M Chmeissani, P Comas, J.M Crespo, M Delfino, E Fernandez, M Fernandez-Bosman, Ll Garrido, A Juste, M Martinez, et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 405:(1997), pp. 379-388. [10.1016/S0370-2693(97)00715-6]

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

FOCARDI, ETTORE;CIULLI, VITALIANO;
1997

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 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/c2. This cross section limit implies, assuming the MSSM, a lower limit of 67 (69) GeV/c2 on the mass of right- (left-) handed long-lived scalar taus or scalar muons and of 86 GeV/c2 on the mass of long-lived charginos.
1997
405
379
388
R Barate;D Buskulic;D Decamp;P Ghez;C Goy;J.-P Lees;A Lucotte;M.-N Minard;J.-Y Nief;B Pietrzyk;M.P Casado;M Chmeissani;P Comas;J.M Cresp...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/638708
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