Searches for scalar top, scalar bottom and mass-degenerate scalar quarks are performed in the data collected by the ALEPH detector at LEP, at centre-of-mass energies up to 209 GeV, corresponding to an integrated luminosity of 675 pb-1. No evidence for the production of such particles is found in the decay channels t̃ →c/ux, t̃ → bℓṽ,b̃ → bx,q̃ → qx or in the stop four-body decay channel t̃ → bxff̄′ studied for the first time at LEP. The results of these searches yield improved mass lower limits. In particular, an absolute lower limit of 63 GeV/c2 is obtained for the stop mass, at 95% confidence level, irrespective of the stop lifetime and decay branching ratios. © 2002 Elsevier Science B.V. All rights reserved.

Search for scalar quarks in e(+)e(-) collisions at root s up to 209 GeV / A. HEISTER AND S., S., R., B., R., B., I., D.B., D., D., C., G., S., J., J. P., L., F., M., E., M., M. N., M., B. PIETRZYK AND B., T., G., B., S., B., M. P., C., M., C., J. M., C., E., F., M., F.B., Garrido, L.L., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 537:1-2(2002), pp. 5-20. [10.1016/S0370-2693(02)01827-0]

Search for scalar quarks in e(+)e(-) collisions at root s up to 209 GeV

CREANZA, Donato Maria;DE FILIPPIS, Nicola;IASELLI, Giuseppe;Maggi, Giorgio Pietro;
2002

Abstract

Searches for scalar top, scalar bottom and mass-degenerate scalar quarks are performed in the data collected by the ALEPH detector at LEP, at centre-of-mass energies up to 209 GeV, corresponding to an integrated luminosity of 675 pb-1. No evidence for the production of such particles is found in the decay channels t̃ →c/ux, t̃ → bℓṽ,b̃ → bx,q̃ → qx or in the stop four-body decay channel t̃ → bxff̄′ studied for the first time at LEP. The results of these searches yield improved mass lower limits. In particular, an absolute lower limit of 63 GeV/c2 is obtained for the stop mass, at 95% confidence level, irrespective of the stop lifetime and decay branching ratios. © 2002 Elsevier Science B.V. All rights reserved.
2002
Search for scalar quarks in e(+)e(-) collisions at root s up to 209 GeV / A. HEISTER AND S., S., R., B., R., B., I., D.B., D., D., C., G., S., J., J. P., L., F., M., E., M., M. N., M., B. PIETRZYK AND B., T., G., B., S., B., M. P., C., M., C., J. M., C., E., F., M., F.B., Garrido, L.L., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 537:1-2(2002), pp. 5-20. [10.1016/S0370-2693(02)01827-0]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/3571
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