The data collected by ALEPH at LEP at centre-of-mass energies ranging from 181 to 184 GeV, corresponding to an integrated luminosity of 57 pb(-1), are analysed to search for pair-produced neutral Higgs bosons h and A, in the b (b) over bar b (b) over bar and tau(+)tau(-)b (b) over bar final states. Two events are found in the data with 2.5 expected from standard model processes. When combined with the lower energy data collected by ALEPH and with earlier reported searches for associated hZ production, these analyses are interpreted in the context of the minimal supersymmetric extension of the standard model (MSSM). For standard choices of MSSM parameter sets, this combination results in 95% C.L. exclusion lower limits of 72.2 and 76.1 GeV/c(2) for m(h) and m(A), irrespective of tan beta. A scan of the MSSM parameter space is performed in which the model parameters are varied over wide ranges. For low values of tan beta, i.e., for 1 < tan beta less than or similar to 2, the limit on m(h) of similar to 88 GeV/c(2) is shown to be robust, being satisfied in essentially all of the physically allowed domain.
Searches for the neutral Higgs bosons of the MSSM in e+e− collisions at centre-of-mass energies of 181–184 GeV / Barate, R; Buskulic, D; Decamp, D; Ghez, P; Goy, C; Jezequel, S; Lees, Jp; Lucotte, A; Martin, F; Merle, E; Minard, Mn; Nief, Jy; Perrodo, P; Pietrzyk, B; Alemany, R; Casado, Mp; Chmeissani, M; Crespo, Jm; Delfino, M; Fernandez, E; Fernandez Bosman, M; Garrido, L; Grauges, E; Juste, A; Martinez, M; Merino, G; Miquel, R; Mir, Lm; Morawitz, P; Pacheco, A; Park, Ic; Pascual, A; Riu, I; Sanchez, F; Colaleo, A; Creanza, Donato Maria; de Palma, M; Gelao, G; Iaselli, Giuseppe; Maggi, Giorgio Pietro; Maggi, M; Nuzzo, S; Ranieri, A; Raso, G; Ruggieri, F; Selvaggi, G; Silvestris, L; Tempesta, P; Tricomi, A; Zito, G; Huang, X; Lin, J; Ouyang, Q; Wang, T; Xie, Y; Xu, R; Xue, S; Zhang, J; Zhang, L; Zhao, W; Abbaneo, D; Becker, U; Boix, G; Cattaneo, M; Cerutti, F; Ciulli, V; Dissertori, G; Drevermann, H; Forty, Rw; Frank, M; Gianotti, F; Hagelberg, R; Halley, Aw; Hansen, Jb; Harvey, J; Janot, P; Jost, B; Lehraus, I; Leroy, O; Maley, P; Mato, P; Minten, A; Moneta, L; Moutoussi, A; Ranjard, F; Rolandi, L; Rousseau, D; Schlatter, D; Schmitt, M; Schneider, O; Tejessy, W; Teubert, F; Tomalin, Ir; Tournefier, E; Vreeswijk, M; Wachsmuth, H; Ajaltouni, Z; Badaud, F; Chazelle, G; Deschamps, O; Dessagne, S; Falvard, A; Ferdi, C; Gay, P; Guicheney, C; Henrard, P; Jousset, J; Michel, B; Monteil, S; Montret, Jc; Pallin, D; Perret, P; Podlyski, F; Hansen, Jd; Hansen, Jr; Hansen, Ph; Nilsson, Bs; Rensch, B; Waananen, A; Daskalakis, G; Kyriakis, A; Markou, C; Simopoulou, E; Vayaki, A; Blondel, A; Brient, Jc; Machefert, F; Rouge, A; Rumpf, M; Tanaka, R; Valassi, A; Videau, H; Focardi, E; Parrini, G; Zachariadou, K; Cavanaugh, R; Corden, M; Georgiopoulos, C; Huehn, T; Jaffe, De; Antonelli, A; Bencivenni, G; Bologna, G; Bossi, F; Campana, P; Capon, G; Chiarella, V; Laurelli, P; Mannocchi, G; Murtas, F; Murtas, Gp; Passalacqua, L; Pepe Altarelli, M; Chalmers, M; Curtis, L; Lynch, Jg; Negus, P; O'Shea, V; Raine, C; Scarr, Jm; Teixeira Dias, P; Thompson, As; Thomson, E; Ward, Jj; Buchmuller, O; Dhamotharan, S; Geweniger, Cc; Hanke, P; Hansper, G; Hepp, V; Kluge, Ee; Putzer, A; Sommer, J; Tittel, K; Werner, S; Wunsch, M; Beuselinck, R; Binnie, Dm; Cameron, W; Dornan, Pj; Girone, M; Goodsir, S; Marinelli, N; Martin, Eb; Nash, J; Sedgbeer, Jk; Spagnolo, P; Williams, Md; Ghete, Vm; Girtler, P; Kneringer, E; Kuhn, D; Rudolph, G; Betteridge, Ap; Bowdery, Ck; Buck, Pg; Colrain, P; Crawford, G; Ellis, G; Finch, Aj; Foster, F; Hughes, G; Jones, Rwl; Robertson, An; Williams, Mi; van Gemmeren, P; Giehl, I; Hoffmann, C; Jakobs, K; Kleinknecht, K; Krocker, M; Nurnberger, Ha; Quast, G; Renk, B; Rohne, E; Sander, Hg; Schmeling, S; Zeitnitz, C; Ziegler, T; Aubert, Jj; Benchouk, C; Bonissent, A; Carr, J; Coyle, P; Ealet, A; Fouchez, D; Motsch, F; Payre, P; Talby, M; Thulasidas, M; Tilquin, A; Aleppo, M; Antonelli, M; Ragusa, F; Berlich, R; Buscher, V; Dietl, H; Ganis, G; Huttmann, K; Lutjens, G; Mannert, C; Manner, W; Moser, Hg; Schael, S; Settles, R; Seywerd, H; Stenzel, H; Wiedenmann, W; Wolf, G; Boucrot, J; Callot, O; Chen, S; Davier, M; Duflot, L; Grivaz, Jf; Heusse, P; Hocker, A; Jacholkowska, A; Kado, M; Kim, Dw; Le Diberder, F; Lefrancois, J; Serin, L; Veillet, Jj; Videau, I; de Regie, Jbd; Zerwas, D; Azzurri, P; Bagliesi, G; Bettarini, S; Boccali, T; Bozzi, C; Calderini, G; Dell'Orso, R; Fantechi, R; Ferrante, I; Giassi, A; Gregorio, A; Ligabue, F; Lusiani, A; Marrocchesi, Ps; Messineo, A; Palla, F; Rizzo, G; Sanguinetti, G; Sciaba, A; Sguazzoni, G; Tenchini, R; Vannini, C; Venturi, A; Verdini, Pg; Blair, Ga; Chambers, Jt; Coles, J; Cowan, G; Green, Mg; Medcalf, T; Strong, Ja; von Wimmersperg Toeller, Jh; Botterill, Dr; Clifft, Rw; Edgecock, Tr; Norton, Pr; Thompson, Jc; Wright, Ae; Bloch Devaux, B; Colas, P; Fabbro, B; Faif, G; Lancon, E; Lemaire, Mc; Locci, E; Perez, P; Przysiezniak, H; Rander, J; Renardy, Jf; Rosowsky, A; Trabelsi, A; Tuchming, B; Vallage, B; Black, Sn; Dann, Jh; Kim, Hy; Konstantinidis, N; Litke, Am; Mcneil, Ma; Taylor, G; Booth, Cn; Cartwright, S; Combley, F; Kelly, Ms; Lehto, M; Thompson, Lf; Affholderbach, K; Bohrer, A; Brandt, S; Foss, J; Grupen, C; Prange, C; Smolik, L; Stephan, F; Giannini, G; Gobbo, B; Putz, J; Rothberg, J; Wasserbaech, S; Williams, Rw; Armstrong, Sr; Charles, E; Elmer, P; Ferguson, Dps; Gao, Y; Gonzalez, S; Greening, Tc; Hayes, Oj; Hu, H; Jin, S; Mamier, G; Mcnamara, Pa; Nachtman, Jm; Nielsen, J; Orejudos, W; Pan, Yb; Saadi, Y; Scott, Ij; Vogt, M; Walsh, J; Wu, Sl; Xu, X; Zobernig, G.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 440:3-4(1998), pp. 419-434. [10.1016/S0370-2693(98)01240-4]
Searches for the neutral Higgs bosons of the MSSM in e+e− collisions at centre-of-mass energies of 181–184 GeV
Barate R; Buskulic D; Decamp D; Ghez P; Goy C; Jezequel S; Lees JP; Lucotte A; Martin F; Merle E; Minard MN; Nief JY; Perrodo P; Pietrzyk B; Alemany R; Casado MP; Chmeissani M; Crespo JM; Delfino M; Fernandez E; Fernandez Bosman M; Garrido L; Grauges E; Juste A; Martinez M; Merino G; Miquel R; Mir LM; Morawitz P; Pacheco A; Park IC; Pascual A; Riu I; Sanchez F; Colaleo A; Creanza, Donato Maria ;de Palma M; Gelao G; IASELLI, Giuseppe ;MAGGI, Giorgio Pietro ;Maggi M; Nuzzo S; Ranieri A; Raso G; Ruggieri F; Selvaggi G; Silvestris L; Tempesta P; Tricomi A; Zito G; Huang X; Lin J; Ouyang Q; Wang T; Xie Y; Xu R; Xue S; Zhang J; Zhang L; Zhao W; Abbaneo D; Becker U; Boix G; Cattaneo M; Cerutti F; Ciulli V; Dissertori G; Drevermann H; Forty RW; Frank M; Gianotti F; Hagelberg R; Halley AW; Hansen JB; Harvey J; Janot P; Jost B; Lehraus I; Leroy O; Maley P; Mato P; Minten A; Moneta L; Moutoussi A; Ranjard F; Rolandi L; Rousseau D; Schlatter D; Schmitt M; Schneider O; Tejessy W; Teubert F; Tomalin IR; Tournefier E; Vreeswijk M; Wachsmuth H; Ajaltouni Z; Badaud F; Chazelle G; Deschamps O; Dessagne S; Falvard A; Ferdi C; Gay P; Guicheney C; Henrard P; Jousset J; Michel B; Monteil S; Montret JC; Pallin D; Perret P; Podlyski F; Hansen JD; Hansen JR; Hansen PH; Nilsson BS; Rensch B; Waananen A; Daskalakis G; Kyriakis A; Markou C; Simopoulou E; Vayaki A; Blondel A; Brient JC; Machefert F; Rouge A; Rumpf M; Tanaka R; Valassi A; Videau H; Focardi E; Parrini G; Zachariadou K; Cavanaugh R; Corden M; Georgiopoulos C; Huehn T; Jaffe DE; Antonelli A; Bencivenni G; Bologna G; Bossi F; Campana P; Capon G; Chiarella V; Laurelli P; Mannocchi G; Murtas F; Murtas GP; Passalacqua L; Pepe Altarelli M; Chalmers M; Curtis L; Lynch JG; Negus P; O'Shea V; Raine C; Scarr JM; Teixeira Dias P; Thompson AS; Thomson E; Ward JJ; Buchmuller O; Dhamotharan S; Geweniger CC; Hanke P; Hansper G; Hepp V; Kluge EE; Putzer A; Sommer J; Tittel K; Werner S; Wunsch M; Beuselinck R; Binnie DM; Cameron W; Dornan PJ; Girone M; Goodsir S; Marinelli N; Martin EB; Nash J; Sedgbeer JK; Spagnolo P; Williams MD; Ghete VM; Girtler P; Kneringer E; Kuhn D; Rudolph G; Betteridge AP; Bowdery CK; Buck PG; Colrain P; Crawford G; Ellis G; Finch AJ; Foster F; Hughes G; Jones RWL; Robertson AN; Williams MI; van Gemmeren P; Giehl I; Hoffmann C; Jakobs K; Kleinknecht K; Krocker M; Nurnberger HA; Quast G; Renk B; Rohne E; Sander HG; Schmeling S; Zeitnitz C; Ziegler T; Aubert JJ; Benchouk C; Bonissent A; Carr J; Coyle P; Ealet A; Fouchez D; Motsch F; Payre P; Talby M; Thulasidas M; Tilquin A; Aleppo M; Antonelli M; Ragusa F; Berlich R; Buscher V; Dietl H; Ganis G; Huttmann K; Lutjens G; Mannert C; Manner W; Moser HG; Schael S; Settles R; Seywerd H; Stenzel H; Wiedenmann W; Wolf G; Boucrot J; Callot O; Chen S; Davier M; Duflot L; Grivaz JF; Heusse P; Hocker A; Jacholkowska A; Kado M; Kim DW; Le Diberder F; Lefrancois J; Serin L; Veillet JJ; Videau I; de Regie JBD; Zerwas D; Azzurri P; Bagliesi G; Bettarini S; Boccali T; Bozzi C; Calderini G; Dell'Orso R; Fantechi R; Ferrante I; Giassi A; Gregorio A; Ligabue F; Lusiani A; Marrocchesi PS; Messineo A; Palla F; Rizzo G; Sanguinetti G; Sciaba A; Sguazzoni G; Tenchini R; Vannini C; Venturi A; Verdini PG; Blair GA; Chambers JT; Coles J; Cowan G; Green MG; Medcalf T; Strong JA; von Wimmersperg Toeller JH; Botterill DR; Clifft RW; Edgecock TR; Norton PR; Thompson JC; Wright AE; Bloch Devaux B; Colas P; Fabbro B; Faif G; Lancon E; Lemaire MC; Locci E; Perez P; Przysiezniak H; Rander J; Renardy JF; Rosowsky A; Trabelsi A; Tuchming B; Vallage B; Black SN; Dann JH; Kim HY; Konstantinidis N; Litke AM; McNeil MA; Taylor G; Booth CN; Cartwright S; Combley F; Kelly MS; Lehto M; Thompson LF; Affholderbach K; Bohrer A; Brandt S; Foss J; Grupen C; Prange C; Smolik L; Stephan F; Giannini G; Gobbo B; Putz J; Rothberg J; Wasserbaech S; Williams RW; Armstrong SR; Charles E; Elmer P; Ferguson DPS; Gao Y; Gonzalez S; Greening TC; Hayes OJ; Hu H; Jin S; Mamier G; McNamara PA; Nachtman JM; Nielsen J; Orejudos W; Pan YB; Saadi Y; Scott IJ; Vogt M; Walsh J; Wu SL; Xu X; Zobernig G.
1998-01-01
Abstract
The data collected by ALEPH at LEP at centre-of-mass energies ranging from 181 to 184 GeV, corresponding to an integrated luminosity of 57 pb(-1), are analysed to search for pair-produced neutral Higgs bosons h and A, in the b (b) over bar b (b) over bar and tau(+)tau(-)b (b) over bar final states. Two events are found in the data with 2.5 expected from standard model processes. When combined with the lower energy data collected by ALEPH and with earlier reported searches for associated hZ production, these analyses are interpreted in the context of the minimal supersymmetric extension of the standard model (MSSM). For standard choices of MSSM parameter sets, this combination results in 95% C.L. exclusion lower limits of 72.2 and 76.1 GeV/c(2) for m(h) and m(A), irrespective of tan beta. A scan of the MSSM parameter space is performed in which the model parameters are varied over wide ranges. For low values of tan beta, i.e., for 1 < tan beta less than or similar to 2, the limit on m(h) of similar to 88 GeV/c(2) is shown to be robust, being satisfied in essentially all of the physically allowed domain.
Citazione
Searches for the neutral Higgs bosons of the MSSM in e+e− collisions at centre-of-mass energies of 181–184 GeV / Barate, R; Buskulic, D; Decamp, D; Ghez, P; Goy, C; Jezequel, S; Lees, Jp; Lucotte, A; Martin, F; Merle, E; Minard, Mn; Nief, Jy; Perrodo, P; Pietrzyk, B; Alemany, R; Casado, Mp; Chmeissani, M; Crespo, Jm; Delfino, M; Fernandez, E; Fernandez Bosman, M; Garrido, L; Grauges, E; Juste, A; Martinez, M; Merino, G; Miquel, R; Mir, Lm; Morawitz, P; Pacheco, A; Park, Ic; Pascual, A; Riu, I; Sanchez, F; Colaleo, A; Creanza, Donato Maria; de Palma, M; Gelao, G; Iaselli, Giuseppe; Maggi, Giorgio Pietro; Maggi, M; Nuzzo, S; Ranieri, A; Raso, G; Ruggieri, F; Selvaggi, G; Silvestris, L; Tempesta, P; Tricomi, A; Zito, G; Huang, X; Lin, J; Ouyang, Q; Wang, T; Xie, Y; Xu, R; Xue, S; Zhang, J; Zhang, L; Zhao, W; Abbaneo, D; Becker, U; Boix, G; Cattaneo, M; Cerutti, F; Ciulli, V; Dissertori, G; Drevermann, H; Forty, Rw; Frank, M; Gianotti, F; Hagelberg, R; Halley, Aw; Hansen, Jb; Harvey, J; Janot, P; Jost, B; Lehraus, I; Leroy, O; Maley, P; Mato, P; Minten, A; Moneta, L; Moutoussi, A; Ranjard, F; Rolandi, L; Rousseau, D; Schlatter, D; Schmitt, M; Schneider, O; Tejessy, W; Teubert, F; Tomalin, Ir; Tournefier, E; Vreeswijk, M; Wachsmuth, H; Ajaltouni, Z; Badaud, F; Chazelle, G; Deschamps, O; Dessagne, S; Falvard, A; Ferdi, C; Gay, P; Guicheney, C; Henrard, P; Jousset, J; Michel, B; Monteil, S; Montret, Jc; Pallin, D; Perret, P; Podlyski, F; Hansen, Jd; Hansen, Jr; Hansen, Ph; Nilsson, Bs; Rensch, B; Waananen, A; Daskalakis, G; Kyriakis, A; Markou, C; Simopoulou, E; Vayaki, A; Blondel, A; Brient, Jc; Machefert, F; Rouge, A; Rumpf, M; Tanaka, R; Valassi, A; Videau, H; Focardi, E; Parrini, G; Zachariadou, K; Cavanaugh, R; Corden, M; Georgiopoulos, C; Huehn, T; Jaffe, De; Antonelli, A; Bencivenni, G; Bologna, G; Bossi, F; Campana, P; Capon, G; Chiarella, V; Laurelli, P; Mannocchi, G; Murtas, F; Murtas, Gp; Passalacqua, L; Pepe Altarelli, M; Chalmers, M; Curtis, L; Lynch, Jg; Negus, P; O'Shea, V; Raine, C; Scarr, Jm; Teixeira Dias, P; Thompson, As; Thomson, E; Ward, Jj; Buchmuller, O; Dhamotharan, S; Geweniger, Cc; Hanke, P; Hansper, G; Hepp, V; Kluge, Ee; Putzer, A; Sommer, J; Tittel, K; Werner, S; Wunsch, M; Beuselinck, R; Binnie, Dm; Cameron, W; Dornan, Pj; Girone, M; Goodsir, S; Marinelli, N; Martin, Eb; Nash, J; Sedgbeer, Jk; Spagnolo, P; Williams, Md; Ghete, Vm; Girtler, P; Kneringer, E; Kuhn, D; Rudolph, G; Betteridge, Ap; Bowdery, Ck; Buck, Pg; Colrain, P; Crawford, G; Ellis, G; Finch, Aj; Foster, F; Hughes, G; Jones, Rwl; Robertson, An; Williams, Mi; van Gemmeren, P; Giehl, I; Hoffmann, C; Jakobs, K; Kleinknecht, K; Krocker, M; Nurnberger, Ha; Quast, G; Renk, B; Rohne, E; Sander, Hg; Schmeling, S; Zeitnitz, C; Ziegler, T; Aubert, Jj; Benchouk, C; Bonissent, A; Carr, J; Coyle, P; Ealet, A; Fouchez, D; Motsch, F; Payre, P; Talby, M; Thulasidas, M; Tilquin, A; Aleppo, M; Antonelli, M; Ragusa, F; Berlich, R; Buscher, V; Dietl, H; Ganis, G; Huttmann, K; Lutjens, G; Mannert, C; Manner, W; Moser, Hg; Schael, S; Settles, R; Seywerd, H; Stenzel, H; Wiedenmann, W; Wolf, G; Boucrot, J; Callot, O; Chen, S; Davier, M; Duflot, L; Grivaz, Jf; Heusse, P; Hocker, A; Jacholkowska, A; Kado, M; Kim, Dw; Le Diberder, F; Lefrancois, J; Serin, L; Veillet, Jj; Videau, I; de Regie, Jbd; Zerwas, D; Azzurri, P; Bagliesi, G; Bettarini, S; Boccali, T; Bozzi, C; Calderini, G; Dell'Orso, R; Fantechi, R; Ferrante, I; Giassi, A; Gregorio, A; Ligabue, F; Lusiani, A; Marrocchesi, Ps; Messineo, A; Palla, F; Rizzo, G; Sanguinetti, G; Sciaba, A; Sguazzoni, G; Tenchini, R; Vannini, C; Venturi, A; Verdini, Pg; Blair, Ga; Chambers, Jt; Coles, J; Cowan, G; Green, Mg; Medcalf, T; Strong, Ja; von Wimmersperg Toeller, Jh; Botterill, Dr; Clifft, Rw; Edgecock, Tr; Norton, Pr; Thompson, Jc; Wright, Ae; Bloch Devaux, B; Colas, P; Fabbro, B; Faif, G; Lancon, E; Lemaire, Mc; Locci, E; Perez, P; Przysiezniak, H; Rander, J; Renardy, Jf; Rosowsky, A; Trabelsi, A; Tuchming, B; Vallage, B; Black, Sn; Dann, Jh; Kim, Hy; Konstantinidis, N; Litke, Am; Mcneil, Ma; Taylor, G; Booth, Cn; Cartwright, S; Combley, F; Kelly, Ms; Lehto, M; Thompson, Lf; Affholderbach, K; Bohrer, A; Brandt, S; Foss, J; Grupen, C; Prange, C; Smolik, L; Stephan, F; Giannini, G; Gobbo, B; Putz, J; Rothberg, J; Wasserbaech, S; Williams, Rw; Armstrong, Sr; Charles, E; Elmer, P; Ferguson, Dps; Gao, Y; Gonzalez, S; Greening, Tc; Hayes, Oj; Hu, H; Jin, S; Mamier, G; Mcnamara, Pa; Nachtman, Jm; Nielsen, J; Orejudos, W; Pan, Yb; Saadi, Y; Scott, Ij; Vogt, M; Walsh, J; Wu, Sl; Xu, X; Zobernig, G.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 440:3-4(1998), pp. 419-434. [10.1016/S0370-2693(98)01240-4]
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