Search for charged Higgs bosons at LEP 2

A search for pair produced charged Higgs bosons has been performed in the high energy data collected by DELPHI at LEP with root s = 161, 172 and 183 GeV. The analysis uses the tau nu tau nu, c (s) over bar tau nu and c<(sc)over bar>s final states and a combination of event shape variables, di-jet masses and jet flavour tagging for the separation of a possible signal from the dominant W+W- and QCD backgrounds. The number of selected events has been found to be compatible with the expected background. The lower excluded value of the H+/- mass obtained by varying the H+/---> hadrons decay branching ratio has been found to be 56.3 GeV/c(2). (C) 1999 Published by Elsevier Science B.V. All rights reserved. RI Gonzalez Caballero, Isidro/E-7354-2010; Krammer, Manfred/A-6508-2010; Muresan, Raluca-Anca/C-3725-2011; Katsanevas, Stavros/A-4297-2011; Ruiz, Alberto/E-4473-2011; Marti-Garcia, Salvador/F-3085-2011; Verzi, Valerio/B-1149-2012; branchini, paolo/A-4857-2011; Shellard, Ronald/G-4825-2012; Petrolini, Alessandro/H-3782-2011; Fruhwirth, Rudolf/H-2529-2012; Monge, Maria Roberta/G-9127-2012