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.
Search for charged Higgs bosons at LEP 2 / Delphi, Collaboration; Abreu, P.; Adam, W.; Canale, Vincenzo. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 460:(1999), pp. 484-497. [10.1016/S0370-2693(99)00771-6]
Search for charged Higgs bosons at LEP 2
CANALE, VINCENZO
1999
Abstract
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
