Flavour independent search for neutral Higgs bosons at LEP

A flavour independent search for the CP-even and CP-odd neutral Higgs bosons h and A is performed in 624 pb−1 of data collected with the L3 detector at LEP at centre-of-mass energies between 189 and 209GeV. Higgs boson production through the e+e−→Zh and the e+e−→hA processes is considered and decays...

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Veröffentlicht in:	Physics letters. B 2004-03, Vol.583 (1-2), p.14-27
Hauptverfasser:	Arefiev, A., Bagnaia, P., Bajo, A., Banerjee, Sw, Bertucci, B., Biland, A., Blaising, J.J., Böhm, A., Branson, J.G., Burger, W.J., Capell, M., Cara Romeo, G., Cartacci, A., Casaus, J., Cavallo, N., Chemarin, M., Chen, H.S., Cifarelli, L., de la Cruz, B., de Asmundis, R., Debreczeni, J., De Salvo, A., Dionisi, C., El Hage, A., Engler, A., Extermann, P., Fisk, I., Freudenreich, K., Garcia-Abia, P., Giagu, S., van Gulik, R., Hofer, H., Hou, S.R., Jones, L.W., Kienzle-Focacci, M.N., Kirkby, J., Kittel, W., König, A.C., Kopal, M., Kraemer, R.W., Krüger, A., Ladron de Guevara, P., Landi, G., Lebrun, P., Lecomte, P., Lecoq, P., Le Goff, J.M., Leiste, R., Levtchenko, M., McNeil, R.R., Merola, L., Metzger, W.J., Natale, S., Nessi-Tedaldi, F., Newman, H., Nisati, A., Novak, T., Organtini, G., Pal, I., Paolucci, P., Patricelli, S., Paus, C., Pauss, F., Pedace, M., Pojidaev, V., Rahaman, M.A., Raics, P., Raspereza, A., Ren, D., Rosenbleck, C., Rosier-Lees, S., Rykaczewski, H., Saremi, S., Sarkar, S., Shevchenko, S., Shoutko, V., Shvorob, A., Son, D., Spillantini, P., Tang, X.W., Timmermans, C., Ting, S.M., Tung, K.L., Ulbricht, J., Valente, E., Van de Walle, R.T., Vasquez, R., Vetlitsky, I., Vicinanza, D., Vogel, H., Vogt, H., Wang, Q., Wang, X.L., Weber, M., Wienemann, P., Xia, L., Yang, B.Z., Yang, C.G., Yang, M., Zalite, Yu
Format:	Artikel
Sprache:	eng
Schlagworte:	Exact sciences and technology High Energy Physics - Experiment Other particles (including hypothetical) Physics Properties of specific particles Standard-model higgs bosons The physics of elementary particles and fields
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Beschreibung
Zusammenfassung:	A flavour independent search for the CP-even and CP-odd neutral Higgs bosons h and A is performed in 624 pb−1 of data collected with the L3 detector at LEP at centre-of-mass energies between 189 and 209GeV. Higgs boson production through the e+e−→Zh and the e+e−→hA processes is considered and decays of the Higgs bosons into hadrons are studied. No significant signal is observed and 95% confidence level limits on the hZZ and hAZ couplings are derived as a function of the Higgs boson masses. Assuming the Standard Model cross section for the Higgs-strahlung process and a 100% branching fraction into hadrons, a 95% confidence level lower limit on the mass of the Higgs boson is set at 110.3 GeV.
ISSN:	0370-2693 1873-2445
DOI:	10.1016/j.physletb.2003.12.039