The data collected at centre-of-mass energies ranging from 130 to 172 GeV by ALEPH at LEP, corresponding to an integrated luminosity of 27.5 pb(-1), are analysed In a search for pair-produced charged Higgs bosons H+/-. Three analyses are employed to select the tau(+)nu(tau)tau(-)<(nu)over bar (tau)>, (-)<(nu)over bar (tau)> and c (s) over bar s (c) over bar final states. No evidence for a signal is found. Mass limits are set as a function of the branching fraction B(tau nu) for H+/--->tau nu. Charged Higgs bosons with masses below 52 GeV/c(2) are excluded at 95% C.L. independently of B(tau nu) thus significantly improving on existing limits. (C) 1998 Published by Elsevier Science B.V.
Search for charged Higgs bosons in e(+)e(-) collisions at centre-of-mass energies from 130 to 172 GeV
Colaleo A;SELVAGGI, Giovanna;DE PALMA, Mauro;NUZZO, Salvatore Vitale
1998-01-01
Abstract
The data collected at centre-of-mass energies ranging from 130 to 172 GeV by ALEPH at LEP, corresponding to an integrated luminosity of 27.5 pb(-1), are analysed In a search for pair-produced charged Higgs bosons H+/-. Three analyses are employed to select the tau(+)nu(tau)tau(-)<(nu)over bar (tau)>, (-)<(nu)over bar (tau)> and c (s) over bar s (c) over bar final states. No evidence for a signal is found. Mass limits are set as a function of the branching fraction B(tau nu) for H+/--->tau nu. Charged Higgs bosons with masses below 52 GeV/c(2) are excluded at 95% C.L. independently of B(tau nu) thus significantly improving on existing limits. (C) 1998 Published by Elsevier Science B.V.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
