@article{33ddb0f7250546a8992dc4cf1e2818a3,
title = "Search for charginos with a small mass difference to the lightest supersymmetric particle at √s = 189 GeV",
abstract = "A search for charginos nearly mass-degenerate with the lightest supersymmetric particle is performed using the 176 pb-1 of data collected at 189 GeV in 1998 with the L3 detector. Mass differences between the chargino and the lightest supersymmetric particle below 4 GeV are considered. The presence of a high transverse momentum photon is required to single out the signal from the photon-photon interaction background. No evidence for charginos is found and upper limits on the cross section for chargino pair production are set. For the first time at LEP2, in the case of heavy scalar leptons, chargino mass limits are obtained for any X1± - X1/0 mass difference.",
author = "{L3 Collaboration} and M. Acciarri and P. Achard and O. Adriani and M. Aguilar-Benitez and J. Alcaraz and G. Alemanni and J. Allaby and A. Aloisio and Alviggi, {M. G.} and G. Ambrosi and H. Anderhub and Andreev, {V. P.} and T. Angelescu and F. Anselmo and A. Arefiev and T. Azemoon and T. Aziz and P. Bagnaia and L. Baksay and A. Balandras and Ball, {R. C.} and S. Banerjee and Sw Banerjee and A. Barczyk and R. Barill{\`e}re and L. Barone and P. Bartalini and M. Basile and R. Battiston and A. Bay and F. Becattini and U. Becker and F. Behner and L. Bellucci and J. Berdugo and P. Berges and B. Bertucci and Betev, {B. L.} and S. Bhattacharya and M. Biasini and A. Biland and Blaising, {J. J.} and Blyth, {S. C.} and Bobbink, {G. J.} and A. B{\"o}hm and L. Boldizsar and B. Borgia and D. Bourilkov and Stickland, {D. P.} and C. Tully",
note = "Publisher Copyright: (C) 2000 Published by Elsevier Science B.V.",
year = "2000",
month = jun,
day = "1",
doi = "10.1016/S0370-2693(00)00488-3",
language = "English (US)",
volume = "482",
pages = "31--42",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier",
number = "1-3",
}