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We report on further analysis of events with large missing transverse energy from 715 nb-1 of data from the UA1 experiment at the CERN proton-antiproton collider. Measured W and Z0 rates and heavy flavour cross sections are used to predict rates of missing transverse energy event from all known standard model process. Limits are derived on two possible new sources, namely: (1) semi-hadronic decays of a fourth sequential charged heavy lepton coupling to the W boson, (2) Z0 decays into additional pairs of non-interacting particles. After taking into additional pairs of non-interacting particles. After taking into account all known sources of missing transverse energy events, we find a mass limit on a fourth-generation charged lepton of mL>41 GeV/c2 (90% CL) and a limit on the number of additional neutrino species of n≤7 (90% CL). © 1987.

Events with large missing transverse energy at the cern collider: II. search for the decays of W± into heavy leptons and of Z0 into non-interacting particles / C., Albajar; M. G., Albrow; O. C., Allkofer; G., Arnison; A., Astbury; B., Aubert; T., Axon; C., Bacci; T., Bacon; N., Bains; J. R., Batley; G., Bauer; S., Beingessner; J., Bellinger; A., Bettini; A., Bezaguet; K., Bos; E., Buckley; G., Bunce; G., Busetto; P., Catz; P., Cennini; S., Centro; F., Ceradini; D. G., Charlton; G., Ciapetti; S., Cittolin; D., Clarke; D., Cline; C., Cochet; J., Colas; P., Colas; M., Corden; J. A., Coughlan; G., Cox; D., Dau; M., Debeer; J. P., Debrion; M., Degiorgi; M., Della Negra; M., Demoulin; B., Denby; D., Denegri; A., Diciaccio; L., Dobrzynski; J., Dorenbosch; J. D., Dowell; E., Duchovni; R., Edgecock; K., Eggert; E., Eisenhandler; N., Ellis; P., Erhard; H., Faissner; I. F., Fensome; M., Fincke Keeler; P., Flynn; G., Fontaine; R., Frey; R., Fruhwirth; L., Gately; J., Garvey; D., Gee; S., Geer; A., Geiser; C., Ghesquiere; P., Ghez; F., Ghio; P., Giacomelli; W. R., Gibson; Y., Giraud Heraud; A., Givernaud; A., Gonidec; H., Grassmann; G., Grayer; W., Haynes; S. J., Haywood; H., Hoffmann; D. J., Holthuizen; R. J., Homer; A., Honma; M., Ikeda; W., Jank; M., Jimack; G., Jorat; P. I. P., Kalmus; V., Karimaki; R., Keeler; I., Kenyon; A., Kernan; A., Khan; W., Kienzle; R., Kinnunen; M., Krammer; J., Kroll; D., Kryn; P., Kyberd; Lacava, Francesco; J. P., Laugier; J. P., Lees; R., Leuchs; S., Levegrun; M., Levi; S., Li; D., Linglin; E., Locci; K., Long; T., Markiewicz; C., Markou; M., Markytan; G., Maurin; J. P., Mendiburu; A., Meneguzzo; J. P., Merlo; T., Meyer; M. N., Minard; M., Mohammadi; K., Morgan; M., Moricca; H. G., Moser; B., Mours; Th, Muller; A., Nandi; L., Naumann; P., Nedelec; A., Norton; D., Pascoli; F., Pauss; C., Perault; P., Petta; E., Petrolo; G., Piano Mortari; E., Pietarinen; C., Pigot; M., Pimia; D., Pitman; A., Placci; J. P., Porte; E., Radermacher; T., Redelberger; H., Reithler; J. P., Revol; J., Richman; D., Robinson; J., Rohlf; P., Rossi; C., Rubbia; W., Ruhm; G., Sajot; G., Salvini; J., Sass; D., Samyn; A., Savoy Navarro; D., Schinzel; A., Schwartz; W., Scott; C., Seez; T. P., Shah; I., Sheer; I., Siotis; D., Smith; R., Sobie; P., Sphicas; J., Strauss; J., Streets; C., Stubenrauch; D., Summers; K., Sumorok; F., Szoncso; C., Tao; A., Taurok; I., Ten Have; S., Tether; G., Thompson; E., Tscheslog; J., Tuominiemi; B., Van Eijk; J. P., Vialle; L., Villasenor; T. S., Virdee; H., Von Der Schmitt; W., Von Schlippe; J., Vrana; V., Vuillemin; K., Wacker; H. D., Wahl; P., Watkins; A., Wildish; J., Wilson; I., Wingerter; S. J., Wimpenny; X., Wu; C. E., Wulz; T., Wyatt; M., Yvert; C., Zaccardelli; I., Zacharov; N., Zaganidis; L., Zanello; P., Zotto. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 185:1-2(1987), pp. 241-248. [10.1016/0370-2693(87)91562-0]

Events with large missing transverse energy at the cern collider: II. search for the decays of W± into heavy leptons and of Z0 into non-interacting particles

LACAVA, Francesco;
1987

Abstract

We report on further analysis of events with large missing transverse energy from 715 nb-1 of data from the UA1 experiment at the CERN proton-antiproton collider. Measured W and Z0 rates and heavy flavour cross sections are used to predict rates of missing transverse energy event from all known standard model process. Limits are derived on two possible new sources, namely: (1) semi-hadronic decays of a fourth sequential charged heavy lepton coupling to the W boson, (2) Z0 decays into additional pairs of non-interacting particles. After taking into additional pairs of non-interacting particles. After taking into account all known sources of missing transverse energy events, we find a mass limit on a fourth-generation charged lepton of mL>41 GeV/c2 (90% CL) and a limit on the number of additional neutrino species of n≤7 (90% CL). © 1987.
1987
01 Pubblicazione su rivista::01a Articolo in rivista
Events with large missing transverse energy at the cern collider: II. search for the decays of W± into heavy leptons and of Z0 into non-interacting particles / C., Albajar; M. G., Albrow; O. C., Allkofer; G., Arnison; A., Astbury; B., Aubert; T., Axon; C., Bacci; T., Bacon; N., Bains; J. R., Batley; G., Bauer; S., Beingessner; J., Bellinger; A., Bettini; A., Bezaguet; K., Bos; E., Buckley; G., Bunce; G., Busetto; P., Catz; P., Cennini; S., Centro; F., Ceradini; D. G., Charlton; G., Ciapetti; S., Cittolin; D., Clarke; D., Cline; C., Cochet; J., Colas; P., Colas; M., Corden; J. A., Coughlan; G., Cox; D., Dau; M., Debeer; J. P., Debrion; M., Degiorgi; M., Della Negra; M., Demoulin; B., Denby; D., Denegri; A., Diciaccio; L., Dobrzynski; J., Dorenbosch; J. D., Dowell; E., Duchovni; R., Edgecock; K., Eggert; E., Eisenhandler; N., Ellis; P., Erhard; H., Faissner; I. F., Fensome; M., Fincke Keeler; P., Flynn; G., Fontaine; R., Frey; R., Fruhwirth; L., Gately; J., Garvey; D., Gee; S., Geer; A., Geiser; C., Ghesquiere; P., Ghez; F., Ghio; P., Giacomelli; W. R., Gibson; Y., Giraud Heraud; A., Givernaud; A., Gonidec; H., Grassmann; G., Grayer; W., Haynes; S. J., Haywood; H., Hoffmann; D. J., Holthuizen; R. J., Homer; A., Honma; M., Ikeda; W., Jank; M., Jimack; G., Jorat; P. I. P., Kalmus; V., Karimaki; R., Keeler; I., Kenyon; A., Kernan; A., Khan; W., Kienzle; R., Kinnunen; M., Krammer; J., Kroll; D., Kryn; P., Kyberd; Lacava, Francesco; J. P., Laugier; J. P., Lees; R., Leuchs; S., Levegrun; M., Levi; S., Li; D., Linglin; E., Locci; K., Long; T., Markiewicz; C., Markou; M., Markytan; G., Maurin; J. P., Mendiburu; A., Meneguzzo; J. P., Merlo; T., Meyer; M. N., Minard; M., Mohammadi; K., Morgan; M., Moricca; H. G., Moser; B., Mours; Th, Muller; A., Nandi; L., Naumann; P., Nedelec; A., Norton; D., Pascoli; F., Pauss; C., Perault; P., Petta; E., Petrolo; G., Piano Mortari; E., Pietarinen; C., Pigot; M., Pimia; D., Pitman; A., Placci; J. P., Porte; E., Radermacher; T., Redelberger; H., Reithler; J. P., Revol; J., Richman; D., Robinson; J., Rohlf; P., Rossi; C., Rubbia; W., Ruhm; G., Sajot; G., Salvini; J., Sass; D., Samyn; A., Savoy Navarro; D., Schinzel; A., Schwartz; W., Scott; C., Seez; T. P., Shah; I., Sheer; I., Siotis; D., Smith; R., Sobie; P., Sphicas; J., Strauss; J., Streets; C., Stubenrauch; D., Summers; K., Sumorok; F., Szoncso; C., Tao; A., Taurok; I., Ten Have; S., Tether; G., Thompson; E., Tscheslog; J., Tuominiemi; B., Van Eijk; J. P., Vialle; L., Villasenor; T. S., Virdee; H., Von Der Schmitt; W., Von Schlippe; J., Vrana; V., Vuillemin; K., Wacker; H. D., Wahl; P., Watkins; A., Wildish; J., Wilson; I., Wingerter; S. J., Wimpenny; X., Wu; C. E., Wulz; T., Wyatt; M., Yvert; C., Zaccardelli; I., Zacharov; N., Zaganidis; L., Zanello; P., Zotto. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 185:1-2(1987), pp. 241-248. [10.1016/0370-2693(87)91562-0]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/486237
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