Search for a new weakly interacting particle

D. Decamp; B. Deschizeaux; C. Goy; J. P. Lees; M. N. Minard; R. Alemany; J. M. Crespo; M. Delfino; E. Fernandez; V. Gaitan; Ll Garrido; P. Mato; Mir Ll.M.; A. Pacheco; M. G. Catanesi; D. Creanza; M. de Palma; A. Farilla; G. Iaselli; G. Maggi; M. Maggi; S. Natali; S. Nuzzo; M. Quattromini; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; Y. Gao; H. Hu; D. Huang; X. Huang; J. Lin; J. Lou; C. Qiao; T. Ruan; T. Wang; Y. Xie; D. Xu; R. Xu; J. Zhang; W. Zhao; W. B. Atwood; F. Bird; E. Blucher; G. Bonvicini; F. Bossi; D. Brown; T. H. Burnett; H. Drevermann; F. Dydak; R. W. Forty; C. Grab; R. Hagelberg; S. Haywood; J. Hilgart; B. Jost; M. Kasemann; J. Knobloch; A. Lacourt; E. Lançon; I. Lehraus; T. Lohse; A. Marchioro; M. Martinez; S. Menary; A. Minten; A. Miotto; R. Miguel; H. G. Moser; J. Nash; P. Palazzi; F. Ranjard; G. Redlinger; A. Roth; J. Rothberg; H. Rotscheidt; R. St. Denis; D. Schlatter; M. Takashima; M. Talby; W. Tejessy; H. Wachsmuth; S. Wasserbaech; S. Wheeler; W. Wiedenmann; W. Witzeling; J. Wotschack; Z. Ajaltouni; M. Bardadin-Otwinowska; A. Falvard; R. El Fellous; P. Gay; J. Harvey; P. Henrard; J. Jousset; B. Michel; J. C. Montret; D. Pallin; P. Perret; J. Proriol; F. Prulhière; G. Stimpfl; J. D. Hansen; J. R. Hansen; P. H. Hansen; R. Møllerud; E. R. Nielsen; B. S. Nilsson; I. Efthymiopoulos; E. Simopoulou; A. Vayaki; J. Badier; A. Blondel; G. Bonneaud; J. Bourotte; F. Braems; J. C. Brient; G. Fouque; A. Gamess; R. Guirlet; S. Orteu; A. Rosowsky; A. Rougé; M. Rumpf; R. Tanaka; H. Videau; D. J. Candlin; E. Veitch; G. Parrini; M. Corden; C. Georgiopoulos; M. Ikeda; J. Lannutti; D. Levinthal; M. Mermikides; L. Sawyer; A. Antonelli; R. Baldini; G. Bencivenni; G. Bologna; P. Campana; G. Capon; V. Chiarella; B. D'Ettorre-Piazzoli; G. Felici; P. Laurelli; G. Mannocchi; F. Murtas; G. P. Murtas; G. Nicoletti; L. Passalacqua; M. Pepe-Altarelli; P. Picchi; P. Zografou; B. Altoon; O. Boyle; A. W. Halley; I. ten Have; J. L. Hearns; J. G. Lynch; W. T. Morton; C. Raine; J. M. Scarr; K. Smith; A. S. Thompson; R. M. Turnbull; B. Brandl; O. Braun; R. Geiges; C. Geweniger; P. Hanke; V. Hepp; E. E. Kluge; Y. Maumary; A. Putzer; B. Rensch; A. Stahl; K. Tittel; M. Wunsch; A. T. Belk; R. Beuselinck; D. M. Binnie; W. Cameron; M. Cattaneo; P. J. Dornan; S. Dugeay; A. M. Greene; J. F. Hassard; N. M. Lieske; S. J. Patton; D. G. Payne; M. J. Phillips; J. K. Sedgbeer; G. Taylor; I. R. Tomalin; A. G. Wright; P. Girtler; D. Kuhn; G. Rudolph; C. K. Bowdery; T. J. Brodbeck; A. J. Finch; F. Foster; G. Hughes; N. R. Keemer; M. Nuttall; A. Patel; B. S. Rowlingson; T. Sloan; S. W. Snow; E. P. Whelan; T. Barczewski; L. A.T. Bauerdick; K. Kleinknecht; B. Renk; S. Roehn; H. G. Sander; M. Schmelling; H. Schmidt; F. Steeg; J. P. Albanese; J. J. Aubert; C. Benchouk; V. Bernard; A. Bonissent; D. Courvoisier; F. Etienne; S. Papalexiou; P. Payre; B. Pietrzyk; Z. Qian; H. Becker; W. Blum; P. Cattaneo; G. Cowan; B. Dehning; H. Dietl; M. Fernandez-Bosman; T. Hansl-Kozanecka; A. Jahn; W. Kozanecki; E. Lange; J. Lauber; G. Lütjens; G. Lutz; W. Männer; Y. Pan; R. Richter; J. Schröder; A. S. Schwarz; R. Settles; U. Stierlin; J. Thomas; G. Wolf; V. Bertin; J. Boucrot; O. Callot; X. Chen; A. Cordier; M. Davier; G. Ganis; J. F. Grivaz; Ph Heusse; P. Janot; D. W. Kim; F. Le Diberder; J. Lefrançois; A. M. Lutz; J. J. Veillet; I. Videau; Z. Zhang; F. Zomer; S. R. Amendolia; G. Bagliesi; G. Batignani; L. Bosisio; U. Bottigli; C. Bradaschia; M. Carpinelli; M. A. Ciocci; R. Dell'Orso; I. Ferrante; F. Fidecaro; L. Foà; E. Focardi; F. Forti; A. Giassi; M. A. Giorgi; F. Ligabue; A. Lusiani; E. B. Mannelli; P. S. Marrocchesi; A. Messineo; L. Moneta; F. Palla; G. Sanguinetti; J. Steinberger; R. Tenchini; G. Tonelli; G. Triggiani; C. Vannini; A. Venturi; P. G. Verdini; J. Walsh; J. M. Carter; M. G. Green; P. V. March; T. Medcalf; I. S. Quazi; M. R. Saich; J. A. Strong; R. M. Thomas; L. R. West; T. Wildish; D. R. Botterill; R. W. Clifft; T. R. Edgecock; M. Edwards; S. M. Fisher; T. J. Jones; P. R. Norton; D. P. Salmon; J. C. Thompson; B. Bloch-Devaux; P. Colas; C. Klopfenstein; E. Locci; S. Loucatos; E. Monnier; P. Perez; J. A. Perlas; F. Perrier; J. Rander; J. F. Renardy; A. Roussarie; J. P. Schuller; J. Schwindling; B. Vallage; J. G. Ashman; C. N. Booth; C. Buttar; R. Carney; S. Cartwright; F. Combley; M. Dinsdale; M. Dogru; F. Hatfield; J. Martin; D. Parker; P. Reeves; L. F. Thompson; S. Brandt; H. Burkhardt; C. Grupen; H. Meinhard; L. Mirabito; E. Neugebauer; U. Schäfer; H. Seywerd; G. Apollinari; G. Giannini; B. Gobbo; F. Liello; F. Ragusa; L. Rolandi; U. Stiegler; L. Bellantoni; J. F. Boudreau; D. Cinabro; J. S. Conway; D. F. Cowen; A. J. DeWeerd; Z. Feng; D. P.S. Ferguson; Y. S. Gao; J. Grahl; J. L. Harton; J. E. Jacobsen; R. C. Jared; R. P. Johnson; B. W. LeClaire; Y. B. Pan; J. R. Pater; Y. Saadi; V. Sharma; A. M. Walsh; J. A. Wear; F. V. Weber; M. H. Whitney; Lan Wu Sau Lan Wu; Z. L. Zhou; G. Zobernig

doi:10.1016/0370-2693(91)90657-C

Search for a new weakly interacting particle

D. Decamp, B. Deschizeaux, C. Goy, J. P. Lees, M. N. Minard, R. Alemany, J. M. Crespo, M. Delfino, E. Fernandez, V. Gaitan, Ll Garrido, P. Mato, Mir Ll.M., A. Pacheco, M. G. Catanesi, D. Creanza, M. de Palma, A. Farilla, G. Iaselli, G. MaggiM. Maggi, S. Natali, S. Nuzzo, M. Quattromini, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, Y. Gao, H. Hu, D. Huang, X. Huang, J. Lin, J. Lou, C. Qiao, T. Ruan, T. Wang, Y. Xie, D. Xu, R. Xu, J. Zhang, W. Zhao, W. B. Atwood, F. Bird, E. Blucher, G. Bonvicini, F. Bossi, D. Brown, T. H. Burnett, H. Drevermann, F. Dydak, R. W. Forty, C. Grab, R. Hagelberg, S. Haywood, J. Hilgart, B. Jost, M. Kasemann, J. Knobloch, A. Lacourt, E. Lançon, I. Lehraus, T. Lohse, A. Marchioro, M. Martinez, S. Menary, A. Minten, A. Miotto, R. Miguel, H. G. Moser, J. Nash, P. Palazzi, F. Ranjard, G. Redlinger, A. Roth, J. Rothberg, H. Rotscheidt, R. St. Denis, D. Schlatter, M. Takashima, M. Talby, W. Tejessy, H. Wachsmuth, S. Wasserbaech, S. Wheeler, W. Wiedenmann, W. Witzeling, J. Wotschack, Z. Ajaltouni, M. Bardadin-Otwinowska, A. Falvard, R. El Fellous, P. Gay, J. Harvey, P. Henrard, J. Jousset, B. Michel, J. C. Montret, D. Pallin, P. Perret, J. Proriol, F. Prulhière, G. Stimpfl, J. D. Hansen, J. R. Hansen, P. H. Hansen, R. Møllerud, E. R. Nielsen, B. S. Nilsson, I. Efthymiopoulos, E. Simopoulou, A. Vayaki, J. Badier, A. Blondel, G. Bonneaud, J. Bourotte, F. Braems, J. C. Brient, G. Fouque, A. Gamess, R. Guirlet, S. Orteu, A. Rosowsky, A. Rougé, M. Rumpf, R. Tanaka, H. Videau, D. J. Candlin, E. Veitch, G. Parrini, M. Corden, C. Georgiopoulos, M. Ikeda, J. Lannutti, D. Levinthal, M. Mermikides, L. Sawyer, A. Antonelli, R. Baldini, G. Bencivenni, G. Bologna, P. Campana, G. Capon, V. Chiarella, B. D'Ettorre-Piazzoli, G. Felici, P. Laurelli, G. Mannocchi, F. Murtas, G. P. Murtas, G. Nicoletti, L. Passalacqua, M. Pepe-Altarelli, P. Picchi, P. Zografou, B. Altoon, O. Boyle, A. W. Halley, I. ten Have, J. L. Hearns, J. G. Lynch, W. T. Morton, C. Raine, J. M. Scarr, K. Smith, A. S. Thompson, R. M. Turnbull, B. Brandl, O. Braun, R. Geiges, C. Geweniger, P. Hanke, V. Hepp, E. E. Kluge, Y. Maumary, A. Putzer, B. Rensch, A. Stahl, K. Tittel, M. Wunsch, A. T. Belk, R. Beuselinck, D. M. Binnie, W. Cameron, M. Cattaneo, P. J. Dornan, S. Dugeay, A. M. Greene, J. F. Hassard, N. M. Lieske, S. J. Patton, D. G. Payne, M. J. Phillips, J. K. Sedgbeer, G. Taylor, I. R. Tomalin, A. G. Wright, P. Girtler, D. Kuhn, G. Rudolph, C. K. Bowdery, T. J. Brodbeck, A. J. Finch, F. Foster, G. Hughes, N. R. Keemer, M. Nuttall, A. Patel, B. S. Rowlingson, T. Sloan, S. W. Snow, E. P. Whelan, T. Barczewski, L. A.T. Bauerdick, K. Kleinknecht, B. Renk, S. Roehn, H. G. Sander, M. Schmelling, H. Schmidt, F. Steeg, J. P. Albanese, J. J. Aubert, C. Benchouk, V. Bernard, A. Bonissent, D. Courvoisier, F. Etienne, S. Papalexiou, P. Payre, B. Pietrzyk, Z. Qian, H. Becker, W. Blum, P. Cattaneo, G. Cowan, B. Dehning, H. Dietl, M. Fernandez-Bosman, T. Hansl-Kozanecka, A. Jahn, W. Kozanecki, E. Lange, J. Lauber, G. Lütjens, G. Lutz, W. Männer, Y. Pan, R. Richter, J. Schröder, A. S. Schwarz, R. Settles, U. Stierlin, J. Thomas, G. Wolf, V. Bertin, J. Boucrot, O. Callot, X. Chen, A. Cordier, M. Davier, G. Ganis, J. F. Grivaz, Ph Heusse, P. Janot, D. W. Kim, F. Le Diberder, J. Lefrançois, A. M. Lutz, J. J. Veillet, I. Videau, Z. Zhang, F. Zomer, S. R. Amendolia, G. Bagliesi, G. Batignani, L. Bosisio, U. Bottigli, C. Bradaschia, M. Carpinelli, M. A. Ciocci, R. Dell'Orso, I. Ferrante, F. Fidecaro, L. Foà, E. Focardi, F. Forti, A. Giassi, M. A. Giorgi, F. Ligabue, A. Lusiani, E. B. Mannelli, P. S. Marrocchesi, A. Messineo, L. Moneta, F. Palla, G. Sanguinetti, J. Steinberger, R. Tenchini, G. Tonelli, G. Triggiani, C. Vannini, A. Venturi, P. G. Verdini, J. Walsh, J. M. Carter, M. G. Green, P. V. March, T. Medcalf, I. S. Quazi, M. R. Saich, J. A. Strong, R. M. Thomas, L. R. West, T. Wildish, D. R. Botterill, R. W. Clifft, T. R. Edgecock, M. Edwards, S. M. Fisher, T. J. Jones, P. R. Norton, D. P. Salmon, J. C. Thompson, B. Bloch-Devaux, P. Colas, C. Klopfenstein, E. Locci, S. Loucatos, E. Monnier, P. Perez, J. A. Perlas, F. Perrier, J. Rander, J. F. Renardy, A. Roussarie, J. P. Schuller, J. Schwindling, B. Vallage, J. G. Ashman, C. N. Booth, C. Buttar, R. Carney, S. Cartwright, F. Combley, M. Dinsdale, M. Dogru, F. Hatfield, J. Martin, D. Parker, P. Reeves, L. F. Thompson, S. Brandt, H. Burkhardt, C. Grupen, H. Meinhard, L. Mirabito, E. Neugebauer, U. Schäfer, H. Seywerd, G. Apollinari, G. Giannini, B. Gobbo, F. Liello, F. Ragusa, L. Rolandi, U. Stiegler, L. Bellantoni, J. F. Boudreau, D. Cinabro, J. S. Conway, D. F. Cowen, A. J. DeWeerd, Z. Feng, D. P.S. Ferguson, Y. S. Gao, J. Grahl, J. L. Harton, J. E. Jacobsen, R. C. Jared, R. P. Johnson, B. W. LeClaire, Y. B. Pan, J. R. Pater, Y. Saadi, V. Sharma, A. M. Walsh, J. A. Wear, F. V. Weber, M. H. Whitney, Lan Wu Sau Lan Wu, Z. L. Zhou, G. Zobernig

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

A search for events of the type e⁺e^-→ℓ⁺ℓ^-X⁰, where X⁰ can be any weakly interacting particle which couples to the Z, has been performed with the ALEPH detector at LEP, by searching for acollinear lepton pairs. Such particles can be excluded up to a mass of 7.0 GeV/c² for a value of the ratio of branching fractions, Br(Z→X⁰l⁺l^-)/Br(Z→l⁺l^-), greater than 2.5 × 10^-3 if the X⁰ has third component of isospin, I₃ greater than 1 2 and decays to a pair of virtual gauge bosons. When this analysis is combined with the previous results of the Higgs particle searches from ALEPH, this limit can be extended to an X⁰ mass of 60 GeV/c².

Original language	English (US)
Pages (from-to)	139-147
Number of pages	9
Journal	Physics Letters B
Volume	262
Issue number	1
DOIs	https://doi.org/10.1016/0370-2693(91)90657-C
State	Published - Jun 13 1991

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

Access to Document

10.1016/0370-2693(91)90657-C

Cite this

Decamp, D., Deschizeaux, B., Goy, C., Lees, J. P., Minard, M. N., Alemany, R., Crespo, J. M., Delfino, M., Fernandez, E., Gaitan, V., Garrido, L., Mato, P., Ll.M., M., Pacheco, A., Catanesi, M. G., Creanza, D., de Palma, M., Farilla, A., Iaselli, G., ... Zobernig, G. (1991). Search for a new weakly interacting particle. Physics Letters B, 262(1), 139-147. https://doi.org/10.1016/0370-2693(91)90657-C

@article{06cc99319a414be0a07a0b7942f621e4,

title = "Search for a new weakly interacting particle",

abstract = "A search for events of the type e+e-→ℓ+ℓ-X 0, where X0 can be any weakly interacting particle which couples to the Z, has been performed with the ALEPH detector at LEP, by searching for acollinear lepton pairs. Such particles can be excluded up to a mass of 7.0 GeV/c2 for a value of the ratio of branching fractions, Br(Z→X0l+l-)/Br(Z→l+ l-), greater than 2.5 × 10-3 if the X0 has third component of isospin, I3 greater than 1 2 and decays to a pair of virtual gauge bosons. When this analysis is combined with the previous results of the Higgs particle searches from ALEPH, this limit can be extended to an X0 mass of 60 GeV/c2.",

author = "D. Decamp and B. Deschizeaux and C. Goy and Lees, {J. P.} and Minard, {M. N.} and R. Alemany and Crespo, {J. M.} and M. Delfino and E. Fernandez and V. Gaitan and Ll Garrido and P. Mato and Mir Ll.M. and A. Pacheco and Catanesi, {M. G.} and D. Creanza and {de Palma}, M. and A. Farilla and G. Iaselli and G. Maggi and M. Maggi and S. Natali and S. Nuzzo and M. Quattromini and A. Ranieri and G. Raso and F. Romano and F. Ruggieri and G. Selvaggi and L. Silvestris and P. Tempesta and G. Zito and Y. Gao and H. Hu and D. Huang and X. Huang and J. Lin and J. Lou and C. Qiao and T. Ruan and T. Wang and Y. Xie and D. Xu and R. Xu and J. Zhang and W. Zhao and Atwood, {W. B.} and F. Bird and E. Blucher and G. Bonvicini and F. Bossi and D. Brown and Burnett, {T. H.} and H. Drevermann and F. Dydak and Forty, {R. W.} and C. Grab and R. Hagelberg and S. Haywood and J. Hilgart and B. Jost and M. Kasemann and J. Knobloch and A. Lacourt and E. Lan{\c c}on and I. Lehraus and T. Lohse and A. Marchioro and M. Martinez and S. Menary and A. Minten and A. Miotto and R. Miguel and Moser, {H. G.} and J. Nash and P. Palazzi and F. Ranjard and G. Redlinger and A. Roth and J. Rothberg and H. Rotscheidt and {St. Denis}, R. and D. Schlatter and M. Takashima and M. Talby and W. Tejessy and H. Wachsmuth and S. Wasserbaech and S. Wheeler and W. Wiedenmann and W. Witzeling and J. Wotschack and Z. Ajaltouni and M. Bardadin-Otwinowska and A. Falvard and {El Fellous}, R. and P. Gay and J. Harvey and P. Henrard and J. Jousset and B. Michel and Montret, {J. C.} and D. Pallin and P. Perret and J. Proriol and F. Prulhi{\`e}re and G. Stimpfl and Hansen, {J. D.} and Hansen, {J. R.} and Hansen, {P. H.} and R. M{\o}llerud and Nielsen, {E. R.} and Nilsson, {B. S.} and I. Efthymiopoulos and E. Simopoulou and A. Vayaki and J. Badier and A. Blondel and G. Bonneaud and J. Bourotte and F. Braems and Brient, {J. C.} and G. Fouque and A. Gamess and R. Guirlet and S. Orteu and A. Rosowsky and A. Roug{\'e} and M. Rumpf and R. Tanaka and H. Videau and Candlin, {D. J.} and E. Veitch and G. Parrini and M. Corden and C. Georgiopoulos and M. Ikeda and J. Lannutti and D. Levinthal and M. Mermikides and L. Sawyer and A. Antonelli and R. Baldini and G. Bencivenni and G. Bologna and P. Campana and G. Capon and V. Chiarella and B. D'Ettorre-Piazzoli and G. Felici and P. Laurelli and G. Mannocchi and F. Murtas and Murtas, {G. P.} and G. Nicoletti and L. Passalacqua and M. Pepe-Altarelli and P. Picchi and P. Zografou and B. Altoon and O. Boyle and Halley, {A. W.} and {ten Have}, I. and Hearns, {J. L.} and Lynch, {J. G.} and Morton, {W. T.} and C. Raine and Scarr, {J. M.} and K. Smith and Thompson, {A. S.} and Turnbull, {R. M.} and B. Brandl and O. Braun and R. Geiges and C. Geweniger and P. Hanke and V. Hepp and Kluge, {E. E.} and Y. Maumary and A. Putzer and B. Rensch and A. Stahl and K. Tittel and M. Wunsch and Belk, {A. T.} and R. Beuselinck and Binnie, {D. M.} and W. Cameron and M. Cattaneo and Dornan, {P. J.} and S. Dugeay and Greene, {A. M.} and Hassard, {J. F.} and Lieske, {N. M.} and Patton, {S. J.} and Payne, {D. G.} and Phillips, {M. J.} and Sedgbeer, {J. K.} and G. Taylor and Tomalin, {I. R.} and Wright, {A. G.} and P. Girtler and D. Kuhn and G. Rudolph and Bowdery, {C. K.} and Brodbeck, {T. J.} and Finch, {A. J.} and F. Foster and G. Hughes and Keemer, {N. R.} and M. Nuttall and A. Patel and Rowlingson, {B. S.} and T. Sloan and Snow, {S. W.} and Whelan, {E. P.} and T. Barczewski and Bauerdick, {L. A.T.} and K. Kleinknecht and B. Renk and S. Roehn and Sander, {H. G.} and M. Schmelling and H. Schmidt and F. Steeg and Albanese, {J. P.} and Aubert, {J. J.} and C. Benchouk and V. Bernard and A. Bonissent and D. Courvoisier and F. Etienne and S. Papalexiou and P. Payre and B. Pietrzyk and Z. Qian and H. Becker and W. Blum and P. Cattaneo and G. Cowan and B. Dehning and H. Dietl and M. Fernandez-Bosman and T. Hansl-Kozanecka and A. Jahn and W. Kozanecki and E. Lange and J. Lauber and G. L{\"u}tjens and G. Lutz and W. M{\"a}nner and Y. Pan and R. Richter and J. Schr{\"o}der and Schwarz, {A. S.} and R. Settles and U. Stierlin and J. Thomas and G. Wolf and V. Bertin and J. Boucrot and O. Callot and X. Chen and A. Cordier and M. Davier and G. Ganis and Grivaz, {J. F.} and Ph Heusse and P. Janot and Kim, {D. W.} and {Le Diberder}, F. and J. Lefran{\c c}ois and Lutz, {A. M.} and Veillet, {J. J.} and I. Videau and Z. Zhang and F. Zomer and Amendolia, {S. R.} and G. Bagliesi and G. Batignani and L. Bosisio and U. Bottigli and C. Bradaschia and M. Carpinelli and Ciocci, {M. A.} and R. Dell'Orso and I. Ferrante and F. Fidecaro and L. Fo{\`a} and E. Focardi and F. Forti and A. Giassi and Giorgi, {M. A.} and F. Ligabue and A. Lusiani and Mannelli, {E. B.} and Marrocchesi, {P. S.} and A. Messineo and L. Moneta and F. Palla and G. Sanguinetti and J. Steinberger and R. Tenchini and G. Tonelli and G. Triggiani and C. Vannini and A. Venturi and Verdini, {P. G.} and J. Walsh and Carter, {J. M.} and Green, {M. G.} and March, {P. V.} and T. Medcalf and Quazi, {I. S.} and Saich, {M. R.} and Strong, {J. A.} and Thomas, {R. M.} and West, {L. R.} and T. Wildish and Botterill, {D. R.} and Clifft, {R. W.} and Edgecock, {T. R.} and M. Edwards and Fisher, {S. M.} and Jones, {T. J.} and Norton, {P. R.} and Salmon, {D. P.} and Thompson, {J. C.} and B. Bloch-Devaux and P. Colas and C. Klopfenstein and E. Locci and S. Loucatos and E. Monnier and P. Perez and Perlas, {J. A.} and F. Perrier and J. Rander and Renardy, {J. F.} and A. Roussarie and Schuller, {J. P.} and J. Schwindling and B. Vallage and Ashman, {J. G.} and Booth, {C. N.} and C. Buttar and R. Carney and S. Cartwright and F. Combley and M. Dinsdale and M. Dogru and F. Hatfield and J. Martin and D. Parker and P. Reeves and Thompson, {L. F.} and S. Brandt and H. Burkhardt and C. Grupen and H. Meinhard and L. Mirabito and E. Neugebauer and U. Sch{\"a}fer and H. Seywerd and G. Apollinari and G. Giannini and B. Gobbo and F. Liello and F. Ragusa and L. Rolandi and U. Stiegler and L. Bellantoni and Boudreau, {J. F.} and D. Cinabro and Conway, {J. S.} and Cowen, {D. F.} and DeWeerd, {A. J.} and Z. Feng and Ferguson, {D. P.S.} and Gao, {Y. S.} and J. Grahl and Harton, {J. L.} and Jacobsen, {J. E.} and Jared, {R. C.} and Johnson, {R. P.} and LeClaire, {B. W.} and Pan, {Y. B.} and Pater, {J. R.} and Y. Saadi and V. Sharma and Walsh, {A. M.} and Wear, {J. A.} and Weber, {F. V.} and Whitney, {M. H.} and {Sau Lan Wu}, {Lan Wu} and Zhou, {Z. L.} and G. Zobernig",

note = "Funding Information: Supported by CAICYT, Spain. 2 Present address: CERN, CH-1211 Geneva 23, Switzerland. 3 Supported by the World Laboratory. 4 Supported by the National Science Foundation of China. 5 Permanent adddress: SLAC, Stanford, CA 94309, USA. 6 Permanent address: University of Washington, Seattle, WA 98195, USA. 7 Also at Centre de Physique des Particules, Facult6 des Sci-ences, F-13288 Marseille Cedex 9, France. 8 Supported by the Danish Natural Science Research Council. 9 Supported by the UK Science and Engineering Research Council. ~o Supported by SLOAN fellowship, contract BR 2703. 11 Supported by the US Department of Energy, contract DE-FG05-87ER40319. 12 Supported by the NSF, contract PHY-8451274. 13 Supported by the US Department of Energy, contract DE-FCOS-85ER250000. ~4 Also at Istituto di Fisica Generale, Universith di Torino, Turin, Italy. 15 Also at Istituto di Cosmo-Geofisica del CNR, I-10133 Turin, Italy. ~6 Supported by the Bundesministerium f'tir Forschung und Technologie, FRG. 17 Supported by Fonds zur F~rderung der wissenschaftlichen Forschung, Austria. is On leave of absence from MIT, Cambridge, MA 02139, USA. 19 Supported by Alexander von Humboldt Fellowship, FRG. 2o Supported by the Korean Science and Engineering Founda-tion and Ministry of Education. 21 Supported by the Institut de Recherche Fondamentale du CEA. 22 Present address: Dipartimento di Fisica, Universit~l di Mil-ano, 1-20133 Milan, Italy. 23 Present address: California Institute of Technology, Pasa-dena, CA 91125, USA. 24 Permanent address: LBL, Berkeley, CA 94720, USA. 25 Supported by the US Department of Energy, contract DE-AC02-76ER00881.",

year = "1991",

month = jun,

day = "13",

doi = "10.1016/0370-2693(91)90657-C",

language = "English (US)",

volume = "262",

pages = "139--147",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "1",

}

Decamp, D, Deschizeaux, B, Goy, C, Lees, JP, Minard, MN, Alemany, R, Crespo, JM, Delfino, M, Fernandez, E, Gaitan, V, Garrido, L, Mato, P, Ll.M., M, Pacheco, A, Catanesi, MG, Creanza, D, de Palma, M, Farilla, A, Iaselli, G, Maggi, G, Maggi, M, Natali, S, Nuzzo, S, Quattromini, M, Ranieri, A, Raso, G, Romano, F, Ruggieri, F, Selvaggi, G, Silvestris, L, Tempesta, P, Zito, G, Gao, Y, Hu, H, Huang, D, Huang, X, Lin, J, Lou, J, Qiao, C, Ruan, T, Wang, T, Xie, Y, Xu, D, Xu, R, Zhang, J, Zhao, W, Atwood, WB, Bird, F, Blucher, E, Bonvicini, G, Bossi, F, Brown, D, Burnett, TH, Drevermann, H, Dydak, F, Forty, RW, Grab, C, Hagelberg, R, Haywood, S, Hilgart, J, Jost, B, Kasemann, M, Knobloch, J, Lacourt, A, Lançon, E, Lehraus, I, Lohse, T, Marchioro, A, Martinez, M, Menary, S, Minten, A, Miotto, A, Miguel, R, Moser, HG, Nash, J, Palazzi, P, Ranjard, F, Redlinger, G, Roth, A, Rothberg, J, Rotscheidt, H, St. Denis, R, Schlatter, D, Takashima, M, Talby, M, Tejessy, W, Wachsmuth, H, Wasserbaech, S, Wheeler, S, Wiedenmann, W, Witzeling, W, Wotschack, J, Ajaltouni, Z, Bardadin-Otwinowska, M, Falvard, A, El Fellous, R, Gay, P, Harvey, J, Henrard, P, Jousset, J, Michel, B, Montret, JC, Pallin, D, Perret, P, Proriol, J, Prulhière, F, Stimpfl, G, Hansen, JD, Hansen, JR, Hansen, PH, Møllerud, R, Nielsen, ER, Nilsson, BS, Efthymiopoulos, I, Simopoulou, E, Vayaki, A, Badier, J, Blondel, A, Bonneaud, G, Bourotte, J, Braems, F, Brient, JC, Fouque, G, Gamess, A, Guirlet, R, Orteu, S, Rosowsky, A, Rougé, A, Rumpf, M, Tanaka, R, Videau, H, Candlin, DJ, Veitch, E, Parrini, G, Corden, M, Georgiopoulos, C, Ikeda, M, Lannutti, J, Levinthal, D, Mermikides, M, Sawyer, L, Antonelli, A, Baldini, R, Bencivenni, G, Bologna, G, Campana, P, Capon, G, Chiarella, V, D'Ettorre-Piazzoli, B, Felici, G, Laurelli, P, Mannocchi, G, Murtas, F, Murtas, GP, Nicoletti, G, Passalacqua, L, Pepe-Altarelli, M, Picchi, P, Zografou, P, Altoon, B, Boyle, O, Halley, AW, ten Have, I, Hearns, JL, Lynch, JG, Morton, WT, Raine, C, Scarr, JM, Smith, K, Thompson, AS, Turnbull, RM, Brandl, B, Braun, O, Geiges, R, Geweniger, C, Hanke, P, Hepp, V, Kluge, EE, Maumary, Y, Putzer, A, Rensch, B, Stahl, A, Tittel, K, Wunsch, M, Belk, AT, Beuselinck, R, Binnie, DM, Cameron, W, Cattaneo, M, Dornan, PJ, Dugeay, S, Greene, AM, Hassard, JF, Lieske, NM, Patton, SJ, Payne, DG, Phillips, MJ, Sedgbeer, JK, Taylor, G, Tomalin, IR, Wright, AG, Girtler, P, Kuhn, D, Rudolph, G, Bowdery, CK, Brodbeck, TJ, Finch, AJ, Foster, F, Hughes, G, Keemer, NR, Nuttall, M, Patel, A, Rowlingson, BS, Sloan, T, Snow, SW, Whelan, EP, Barczewski, T, Bauerdick, LAT, Kleinknecht, K, Renk, B, Roehn, S, Sander, HG, Schmelling, M, Schmidt, H, Steeg, F, Albanese, JP, Aubert, JJ, Benchouk, C, Bernard, V, Bonissent, A, Courvoisier, D, Etienne, F, Papalexiou, S, Payre, P, Pietrzyk, B, Qian, Z, Becker, H, Blum, W, Cattaneo, P, Cowan, G, Dehning, B, Dietl, H, Fernandez-Bosman, M, Hansl-Kozanecka, T, Jahn, A, Kozanecki, W, Lange, E, Lauber, J, Lütjens, G, Lutz, G, Männer, W, Pan, Y, Richter, R, Schröder, J, Schwarz, AS, Settles, R, Stierlin, U, Thomas, J, Wolf, G, Bertin, V, Boucrot, J, Callot, O, Chen, X, Cordier, A, Davier, M, Ganis, G, Grivaz, JF, Heusse, P, Janot, P, Kim, DW, Le Diberder, F, Lefrançois, J, Lutz, AM, Veillet, JJ, Videau, I, Zhang, Z, Zomer, F, Amendolia, SR, Bagliesi, G, Batignani, G, Bosisio, L, Bottigli, U, Bradaschia, C, Carpinelli, M, Ciocci, MA, Dell'Orso, R, Ferrante, I, Fidecaro, F, Foà, L, Focardi, E, Forti, F, Giassi, A, Giorgi, MA, Ligabue, F, Lusiani, A, Mannelli, EB, Marrocchesi, PS, Messineo, A, Moneta, L, Palla, F, Sanguinetti, G, Steinberger, J, Tenchini, R, Tonelli, G, Triggiani, G, Vannini, C, Venturi, A, Verdini, PG, Walsh, J, Carter, JM, Green, MG, March, PV, Medcalf, T, Quazi, IS, Saich, MR, Strong, JA, Thomas, RM, West, LR, Wildish, T, Botterill, DR, Clifft, RW, Edgecock, TR, Edwards, M, Fisher, SM, Jones, TJ, Norton, PR, Salmon, DP, Thompson, JC, Bloch-Devaux, B, Colas, P, Klopfenstein, C, Locci, E, Loucatos, S, Monnier, E, Perez, P, Perlas, JA, Perrier, F, Rander, J, Renardy, JF, Roussarie, A, Schuller, JP, Schwindling, J, Vallage, B, Ashman, JG, Booth, CN, Buttar, C, Carney, R, Cartwright, S, Combley, F, Dinsdale, M, Dogru, M, Hatfield, F, Martin, J, Parker, D, Reeves, P, Thompson, LF, Brandt, S, Burkhardt, H, Grupen, C, Meinhard, H, Mirabito, L, Neugebauer, E, Schäfer, U, Seywerd, H, Apollinari, G, Giannini, G, Gobbo, B, Liello, F, Ragusa, F, Rolandi, L, Stiegler, U, Bellantoni, L, Boudreau, JF, Cinabro, D, Conway, JS, Cowen, DF, DeWeerd, AJ, Feng, Z, Ferguson, DPS, Gao, YS, Grahl, J, Harton, JL, Jacobsen, JE, Jared, RC, Johnson, RP, LeClaire, BW, Pan, YB, Pater, JR, Saadi, Y, Sharma, V, Walsh, AM, Wear, JA, Weber, FV, Whitney, MH, Sau Lan Wu, LW, Zhou, ZL & Zobernig, G 1991, 'Search for a new weakly interacting particle', Physics Letters B, vol. 262, no. 1, pp. 139-147. https://doi.org/10.1016/0370-2693(91)90657-C

TY - JOUR

T1 - Search for a new weakly interacting particle

AU - Decamp, D.

AU - Deschizeaux, B.

AU - Goy, C.

AU - Lees, J. P.

AU - Minard, M. N.

AU - Alemany, R.

AU - Crespo, J. M.

AU - Delfino, M.

AU - Fernandez, E.

AU - Gaitan, V.

AU - Garrido, Ll

AU - Mato, P.

AU - Ll.M., Mir

AU - Pacheco, A.

AU - Catanesi, M. G.

AU - Creanza, D.

AU - de Palma, M.

AU - Farilla, A.

AU - Iaselli, G.

AU - Maggi, G.

AU - Maggi, M.

AU - Natali, S.

AU - Nuzzo, S.

AU - Quattromini, M.

AU - Ranieri, A.

AU - Raso, G.

AU - Romano, F.

AU - Ruggieri, F.

AU - Selvaggi, G.

AU - Silvestris, L.

AU - Tempesta, P.

AU - Zito, G.

AU - Gao, Y.

AU - Hu, H.

AU - Huang, D.

AU - Huang, X.

AU - Lin, J.

AU - Lou, J.

AU - Qiao, C.

AU - Ruan, T.

AU - Wang, T.

AU - Xie, Y.

AU - Xu, D.

AU - Xu, R.

AU - Zhang, J.

AU - Zhao, W.

AU - Atwood, W. B.

AU - Bird, F.

AU - Blucher, E.

AU - Bonvicini, G.

AU - Bossi, F.

AU - Brown, D.

AU - Burnett, T. H.

AU - Drevermann, H.

AU - Dydak, F.

AU - Forty, R. W.

AU - Grab, C.

AU - Hagelberg, R.

AU - Haywood, S.

AU - Hilgart, J.

AU - Jost, B.

AU - Kasemann, M.

AU - Knobloch, J.

AU - Lacourt, A.

AU - Lançon, E.

AU - Lehraus, I.

AU - Lohse, T.

AU - Marchioro, A.

AU - Martinez, M.

AU - Menary, S.

AU - Minten, A.

AU - Miotto, A.

AU - Miguel, R.

AU - Moser, H. G.

AU - Nash, J.

AU - Palazzi, P.

AU - Ranjard, F.

AU - Redlinger, G.

AU - Roth, A.

AU - Rothberg, J.

AU - Rotscheidt, H.

AU - St. Denis, R.

AU - Schlatter, D.

AU - Takashima, M.

AU - Talby, M.

AU - Tejessy, W.

AU - Wachsmuth, H.

AU - Wasserbaech, S.

AU - Wheeler, S.

AU - Wiedenmann, W.

AU - Witzeling, W.

AU - Wotschack, J.

AU - Ajaltouni, Z.

AU - Bardadin-Otwinowska, M.

AU - Falvard, A.

AU - El Fellous, R.

AU - Gay, P.

AU - Harvey, J.

AU - Henrard, P.

AU - Jousset, J.

AU - Michel, B.

AU - Montret, J. C.

AU - Pallin, D.

AU - Perret, P.

AU - Proriol, J.

AU - Prulhière, F.

AU - Stimpfl, G.

AU - Hansen, J. D.

AU - Hansen, J. R.

AU - Hansen, P. H.

AU - Møllerud, R.

AU - Nielsen, E. R.

AU - Nilsson, B. S.

AU - Efthymiopoulos, I.

AU - Simopoulou, E.

AU - Vayaki, A.

AU - Badier, J.

AU - Blondel, A.

AU - Bonneaud, G.

AU - Bourotte, J.

AU - Braems, F.

AU - Brient, J. C.

AU - Fouque, G.

AU - Gamess, A.

AU - Guirlet, R.

AU - Orteu, S.

AU - Rosowsky, A.

AU - Rougé, A.

AU - Rumpf, M.

AU - Tanaka, R.

AU - Videau, H.

AU - Candlin, D. J.

AU - Veitch, E.

AU - Parrini, G.

AU - Corden, M.

AU - Georgiopoulos, C.

AU - Ikeda, M.

AU - Lannutti, J.

AU - Levinthal, D.

AU - Mermikides, M.

AU - Sawyer, L.

AU - Antonelli, A.

AU - Baldini, R.

AU - Bencivenni, G.

AU - Bologna, G.

AU - Campana, P.

AU - Capon, G.

AU - Chiarella, V.

AU - D'Ettorre-Piazzoli, B.

AU - Felici, G.

AU - Laurelli, P.

AU - Mannocchi, G.

AU - Murtas, F.

AU - Murtas, G. P.

AU - Nicoletti, G.

AU - Passalacqua, L.

AU - Pepe-Altarelli, M.

AU - Picchi, P.

AU - Zografou, P.

AU - Altoon, B.

AU - Boyle, O.

AU - Halley, A. W.

AU - ten Have, I.

AU - Hearns, J. L.

AU - Lynch, J. G.

AU - Morton, W. T.

AU - Raine, C.

AU - Scarr, J. M.

AU - Smith, K.

AU - Thompson, A. S.

AU - Turnbull, R. M.

AU - Brandl, B.

AU - Braun, O.

AU - Geiges, R.

AU - Geweniger, C.

AU - Hanke, P.

AU - Hepp, V.

AU - Kluge, E. E.

AU - Maumary, Y.

AU - Putzer, A.

AU - Rensch, B.

AU - Stahl, A.

AU - Tittel, K.

AU - Wunsch, M.

AU - Belk, A. T.

AU - Beuselinck, R.

AU - Binnie, D. M.

AU - Cameron, W.

AU - Cattaneo, M.

AU - Dornan, P. J.

AU - Dugeay, S.

AU - Greene, A. M.

AU - Hassard, J. F.

AU - Lieske, N. M.

AU - Patton, S. J.

AU - Payne, D. G.

AU - Phillips, M. J.

AU - Sedgbeer, J. K.

AU - Taylor, G.

AU - Tomalin, I. R.

AU - Wright, A. G.

AU - Girtler, P.

AU - Kuhn, D.

AU - Rudolph, G.

AU - Bowdery, C. K.

AU - Brodbeck, T. J.

AU - Finch, A. J.

AU - Foster, F.

AU - Hughes, G.

AU - Keemer, N. R.

AU - Nuttall, M.

AU - Patel, A.

AU - Rowlingson, B. S.

AU - Sloan, T.

AU - Snow, S. W.

AU - Whelan, E. P.

AU - Barczewski, T.

AU - Bauerdick, L. A.T.

AU - Kleinknecht, K.

AU - Renk, B.

AU - Roehn, S.

AU - Sander, H. G.

AU - Schmelling, M.

AU - Schmidt, H.

AU - Steeg, F.

AU - Albanese, J. P.

AU - Aubert, J. J.

AU - Benchouk, C.

AU - Bernard, V.

AU - Bonissent, A.

AU - Courvoisier, D.

AU - Etienne, F.

AU - Papalexiou, S.

AU - Payre, P.

AU - Pietrzyk, B.

AU - Qian, Z.

AU - Becker, H.

AU - Blum, W.

AU - Cattaneo, P.

AU - Cowan, G.

AU - Dehning, B.

AU - Dietl, H.

AU - Fernandez-Bosman, M.

AU - Hansl-Kozanecka, T.

AU - Jahn, A.

AU - Kozanecki, W.

AU - Lange, E.

AU - Lauber, J.

AU - Lütjens, G.

AU - Lutz, G.

AU - Männer, W.

AU - Pan, Y.

AU - Richter, R.

AU - Schröder, J.

AU - Schwarz, A. S.

AU - Settles, R.

AU - Stierlin, U.

AU - Thomas, J.

AU - Wolf, G.

AU - Bertin, V.

AU - Boucrot, J.

AU - Callot, O.

AU - Chen, X.

AU - Cordier, A.

AU - Davier, M.

AU - Ganis, G.

AU - Grivaz, J. F.

AU - Heusse, Ph

AU - Janot, P.

AU - Kim, D. W.

AU - Le Diberder, F.

AU - Lefrançois, J.

AU - Lutz, A. M.

AU - Veillet, J. J.

AU - Videau, I.

AU - Zhang, Z.

AU - Zomer, F.

AU - Amendolia, S. R.

AU - Bagliesi, G.

AU - Batignani, G.

AU - Bosisio, L.

AU - Bottigli, U.

AU - Bradaschia, C.

AU - Carpinelli, M.

AU - Ciocci, M. A.

AU - Dell'Orso, R.

AU - Ferrante, I.

AU - Fidecaro, F.

AU - Foà, L.

AU - Focardi, E.

AU - Forti, F.

AU - Giassi, A.

AU - Giorgi, M. A.

AU - Ligabue, F.

AU - Lusiani, A.

AU - Mannelli, E. B.

AU - Marrocchesi, P. S.

AU - Messineo, A.

AU - Moneta, L.

AU - Palla, F.

AU - Sanguinetti, G.

AU - Steinberger, J.

AU - Tenchini, R.

AU - Tonelli, G.

AU - Triggiani, G.

AU - Vannini, C.

AU - Venturi, A.

AU - Verdini, P. G.

AU - Walsh, J.

AU - Carter, J. M.

AU - Green, M. G.

AU - March, P. V.

AU - Medcalf, T.

AU - Quazi, I. S.

AU - Saich, M. R.

AU - Strong, J. A.

AU - Thomas, R. M.

AU - West, L. R.

AU - Wildish, T.

AU - Botterill, D. R.

AU - Clifft, R. W.

AU - Edgecock, T. R.

AU - Edwards, M.

AU - Fisher, S. M.

AU - Jones, T. J.

AU - Norton, P. R.

AU - Salmon, D. P.

AU - Thompson, J. C.

AU - Bloch-Devaux, B.

AU - Colas, P.

AU - Klopfenstein, C.

AU - Locci, E.

AU - Loucatos, S.

AU - Monnier, E.

AU - Perez, P.

AU - Perlas, J. A.

AU - Perrier, F.

AU - Rander, J.

AU - Renardy, J. F.

AU - Roussarie, A.

AU - Schuller, J. P.

AU - Schwindling, J.

AU - Vallage, B.

AU - Ashman, J. G.

AU - Booth, C. N.

AU - Buttar, C.

AU - Carney, R.

AU - Cartwright, S.

AU - Combley, F.

AU - Dinsdale, M.

AU - Dogru, M.

AU - Hatfield, F.

AU - Martin, J.

AU - Parker, D.

AU - Reeves, P.

AU - Thompson, L. F.

AU - Brandt, S.

AU - Burkhardt, H.

AU - Grupen, C.

AU - Meinhard, H.

AU - Mirabito, L.

AU - Neugebauer, E.

AU - Schäfer, U.

AU - Seywerd, H.

AU - Apollinari, G.

AU - Giannini, G.

AU - Gobbo, B.

AU - Liello, F.

AU - Ragusa, F.

AU - Rolandi, L.

AU - Stiegler, U.

AU - Bellantoni, L.

AU - Boudreau, J. F.

AU - Cinabro, D.

AU - Conway, J. S.

AU - Cowen, D. F.

AU - DeWeerd, A. J.

AU - Feng, Z.

AU - Ferguson, D. P.S.

AU - Gao, Y. S.

AU - Grahl, J.

AU - Harton, J. L.

AU - Jacobsen, J. E.

AU - Jared, R. C.

AU - Johnson, R. P.

AU - LeClaire, B. W.

AU - Pan, Y. B.

AU - Pater, J. R.

AU - Saadi, Y.

AU - Sharma, V.

AU - Walsh, A. M.

AU - Wear, J. A.

AU - Weber, F. V.

AU - Whitney, M. H.

AU - Sau Lan Wu, Lan Wu

AU - Zhou, Z. L.

AU - Zobernig, G.

N1 - Funding Information: Supported by CAICYT, Spain. 2 Present address: CERN, CH-1211 Geneva 23, Switzerland. 3 Supported by the World Laboratory. 4 Supported by the National Science Foundation of China. 5 Permanent adddress: SLAC, Stanford, CA 94309, USA. 6 Permanent address: University of Washington, Seattle, WA 98195, USA. 7 Also at Centre de Physique des Particules, Facult6 des Sci-ences, F-13288 Marseille Cedex 9, France. 8 Supported by the Danish Natural Science Research Council. 9 Supported by the UK Science and Engineering Research Council. ~o Supported by SLOAN fellowship, contract BR 2703. 11 Supported by the US Department of Energy, contract DE-FG05-87ER40319. 12 Supported by the NSF, contract PHY-8451274. 13 Supported by the US Department of Energy, contract DE-FCOS-85ER250000. ~4 Also at Istituto di Fisica Generale, Universith di Torino, Turin, Italy. 15 Also at Istituto di Cosmo-Geofisica del CNR, I-10133 Turin, Italy. ~6 Supported by the Bundesministerium f'tir Forschung und Technologie, FRG. 17 Supported by Fonds zur F~rderung der wissenschaftlichen Forschung, Austria. is On leave of absence from MIT, Cambridge, MA 02139, USA. 19 Supported by Alexander von Humboldt Fellowship, FRG. 2o Supported by the Korean Science and Engineering Founda-tion and Ministry of Education. 21 Supported by the Institut de Recherche Fondamentale du CEA. 22 Present address: Dipartimento di Fisica, Universit~l di Mil-ano, 1-20133 Milan, Italy. 23 Present address: California Institute of Technology, Pasa-dena, CA 91125, USA. 24 Permanent address: LBL, Berkeley, CA 94720, USA. 25 Supported by the US Department of Energy, contract DE-AC02-76ER00881.

PY - 1991/6/13

Y1 - 1991/6/13

N2 - A search for events of the type e+e-→ℓ+ℓ-X 0, where X0 can be any weakly interacting particle which couples to the Z, has been performed with the ALEPH detector at LEP, by searching for acollinear lepton pairs. Such particles can be excluded up to a mass of 7.0 GeV/c2 for a value of the ratio of branching fractions, Br(Z→X0l+l-)/Br(Z→l+ l-), greater than 2.5 × 10-3 if the X0 has third component of isospin, I3 greater than 1 2 and decays to a pair of virtual gauge bosons. When this analysis is combined with the previous results of the Higgs particle searches from ALEPH, this limit can be extended to an X0 mass of 60 GeV/c2.

AB - A search for events of the type e+e-→ℓ+ℓ-X 0, where X0 can be any weakly interacting particle which couples to the Z, has been performed with the ALEPH detector at LEP, by searching for acollinear lepton pairs. Such particles can be excluded up to a mass of 7.0 GeV/c2 for a value of the ratio of branching fractions, Br(Z→X0l+l-)/Br(Z→l+ l-), greater than 2.5 × 10-3 if the X0 has third component of isospin, I3 greater than 1 2 and decays to a pair of virtual gauge bosons. When this analysis is combined with the previous results of the Higgs particle searches from ALEPH, this limit can be extended to an X0 mass of 60 GeV/c2.

UR - http://www.scopus.com/inward/record.url?scp=13844317132&partnerID=8YFLogxK

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U2 - 10.1016/0370-2693(91)90657-C

DO - 10.1016/0370-2693(91)90657-C

M3 - Article

AN - SCOPUS:13844317132

SN - 0370-2693

VL - 262

SP - 139

EP - 147

JO - Physics Letters B

JF - Physics Letters B

IS - 1

ER -

Search for a new weakly interacting particle

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