The data collected at centre-of-mass energies of 188.6 GeV by ALEPH at LEP, corresponding to an integrated luminosity of 176.2 pb(-1), are analysed in a search for pair-produced charged Hi,ags bosons H +/-. Three analyses are employed to select the tau(+)7 nu(tau)tau(-)<(nu)over bar>tau, c (s) 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. Upper limits are set on the production cross section as a function of the branching fraction B(H+--> tau(+)nu(tau)) and of the mass m(H+/-), assuming that the sum of the branching ratios is equal to one. In the framework of a two-Higgs-doublet model, charged Higgs bosons with masses below 65.4 GeV/c(2) are excluded at 95% confidence level independently of the decay mode. .

Search for charged Higgs bosons in e(+)e(-) collisions at energies up to root s=189 GeV / Barate, R., Decamp, D., Ghez, P., Goy, C., Jezequel, S., Lees, J.p., Martin, F., Merle, E., Minard, M.n., Pietrzyk, B., Bravo, S., Casado, M.p., Chmeissani, M., Crespo, J.m., Fernandez, E., Fernandez Bosman, M., Garrido, L., Grauges, E., Lopez, J., Martinez, M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 487:3-4(2000), pp. 253-263. [10.1016/S0370-2693(00)00822-4]

Search for charged Higgs bosons in e(+)e(-) collisions at energies up to root s=189 GeV

CREANZA, Donato Maria;DE FILIPPIS, Nicola;IASELLI, Giuseppe;MAGGI, Giorgio Pietro;
2000

Abstract

The data collected at centre-of-mass energies of 188.6 GeV by ALEPH at LEP, corresponding to an integrated luminosity of 176.2 pb(-1), are analysed in a search for pair-produced charged Hi,ags bosons H +/-. Three analyses are employed to select the tau(+)7 nu(tau)tau(-)<(nu)over bar>tau, c (s) 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. Upper limits are set on the production cross section as a function of the branching fraction B(H+--> tau(+)nu(tau)) and of the mass m(H+/-), assuming that the sum of the branching ratios is equal to one. In the framework of a two-Higgs-doublet model, charged Higgs bosons with masses below 65.4 GeV/c(2) are excluded at 95% confidence level independently of the decay mode. .
2000
Search for charged Higgs bosons in e(+)e(-) collisions at energies up to root s=189 GeV / Barate, R., Decamp, D., Ghez, P., Goy, C., Jezequel, S., Lees, J.p., Martin, F., Merle, E., Minard, M.n., Pietrzyk, B., Bravo, S., Casado, M.p., Chmeissani, M., Crespo, J.m., Fernandez, E., Fernandez Bosman, M., Garrido, L., Grauges, E., Lopez, J., Martinez, M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 487:3-4(2000), pp. 253-263. [10.1016/S0370-2693(00)00822-4]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/93
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