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Determination of the Number of Light Neutrino Species

Title:	Determination of the Number of Light Neutrino Species
Authors:	DECAMP D; DESCHIZEAUX B; LEES JP; MINARD MN; CRESPO JM; DELFINO M; FERNANDEZ E; MARTINEZ M; MIQUEL R; MIR ML; ORTEU S; PACHECO A; PERLAS JA; TUBAU E; CATANESI MG; DEPALMA M; FARILLA A; IASELLI G; MAGGI G; MASTROGIACOMO A; NATALI S; NUZZO S; RANIERI A; RASO G; ROMANO F; RUGGIERI F; SELVAGGI G; SILVESTRIS L; TEMPESTA P; ZITO G; CHEN Y; HUANG D; LIN J; RUAN T; WANG T; WU W; XIE Y; XU D; XU R; ZHANG J; ZHAO W; ALBRECHT H; BIRD F; BLUCHER E; CHARITY T; DREVERMANN H; GARRIDO L; GRAB C; HAGELBERG R; HAYWOOD S; JOST B; KASEMANN M; KELLNER G; KNOBLOCH J; LACOURT A; LEHRAUS I; LOHSE T; LUKE D; MARCHIORO A; MATO P; MAY J; MERTENS V; MINTEN A; MIOTTO A; PALAZZI P; PEPEALTARELLI M; RANJARD F; RICHSTEIN J; ROTH A; ROTHBERG J; ROTSCHEIDT H; VONRUDEN W; SCHLATTER D; STDENIS R; TAKASHIMA M; TALBY M; TAUREG H; TEJESSY W; WACHSMUTH H; WHEELER S; WIEDENMANN W; WITZELING W; WOTSCHACK J; AJALTOUNI Z; BARDADINOTWINOWSKA M; FALVARD A; GAY P; HENRARD P; JOUSSET J; MICHEL B; MONTRET JC; PALLIN D; PERRET P; PRAT J; PRORIOL J; PRULHIERE F; BERTELSEN H; HANSEN F; HANSEN JR; HANSEN JD; HANSEN PH; LINDAHL A; MADSEN B; MOLLERUD R; NILSSON BS; PETERSEN G; SIMOPOULOU E; VAYAKI A; BADIER J; BERNARD D; BLONDEL A; BONNEAUD G; BOUROTTE J; BRAEMS F; BRIENT JC; CIOCCI MA; FOUQUE G; GUIRLET R; MINE P; ROUGE A; RUMPF M; VIDEAU H; VIDEAU I; ZWIERSKI D; CANDLIN DJ; CONTI A; PARRINI G; CORDEN M; GEORGIOPOULOS C; GOLDMAN JH; IKEDA M; LEVINTHAL D; LANNUTTI J; MERMIKIDES M; SAWYER L; ANTONELLI A; BALDINI R; BENCIVENNI G; BOLOGNA G; BOSSI F; CAMPANA P; CAPON G; CHIARELLA V; DENINNO G; DETTORREPIAZZOLI B; FELICI G; LAURELLI P; MANNOCCHI G; MURTAS F; MURTAS GP; NICOLETTI G; PICCHI P; ZOGRAFOU P; ALTOON B; BOYLE O; FLAVELL AJ; HALLEY AW; TENHAVE I; HEARNS JA; HUGHES IS; LYNCH JG; MARTIN DJ; ONEILL R; RAINE C; SCARR JM; SMITH K; THOMPSON AS; BRANDL B; BRAUN O; GEIGES R; GEWENIGER C; HANKE P; HEPP V; KLUGE EE; MAUMARY Y; PANTER M; PUTZER A; RENSCH B; STAHL A; TITTEL K; WUNSCH M; BARBER GJ; BELK AT; BEUSELINCK R; BINNIE DM; CAMERON W; CATTANEO M; DORNAN PJ; DUGEAY S; FORTY RW; GENTRY DN; HASSARD JF; MILLER DG; PRICE DR; SEDGBEER JK; TOMALIN IR; TAYLOR G; GIRTLER P; KUHN D; RUDOLPH G; BRODBECK TJ; BOWDERY C; FINCH AJ; FOSTER F; HUGHES G; KEEMER NR; NUTTALL M; ROWLINGSON BS; SLOAN T; SNOW SW; BARCZEWSKI T; BAUERDICK LAT; KLEINKNECHT K; POLLMANN D; RENK B; ROEHN S; SANDER HG; SCHMELLING M; STEEG F; ALBANESE JP; AUBERT JJ; BENCHOUK C; BONISSENT A; ETIENNE F; NACASCH R; PAYRE P; PIETRZYK B; QIAN Z; BLUM W; CATTANEO P; COMIN M; DEHNING B; COWAN G; DIETL H; FERNANDEZBOSMAN M; HAUFF D; JAHN A; LANGE E; LUTJENS G; LUTZ G; MANNER W; MOSER HG; PAN Y; RICHTER R; SCHWARZ A; SETTLES R; STIEGLER U; STIERLIN U; STIMPFL G; THOMAS J; WALTERMANN G; BOUCROT J; CALLOT O; CORDIER A; DAVIER M; DEBOUARD G; GANIS G; GRIVAZ JF; HEUSSE P; JANOT P; JOURNE V; KIM DW; LEFRANCOIS J; LLOYDOWEN D; LUTZ AM; MAROTTE P; VEILLET JJ; AMENDOLIA SR; BAGLIESI G; BATIGNANI G; BOSISIO L; BOTTIGLI U; BRADASCHIA C; FERRANTE I; FIDECARO F; FOA L; FOCARDI E; FORTI F; GIASSI A; GIORGI MA; LIGABUE, FRANCO; LUSIANI, Alberto; MANNELLI EB; MARROCCHESI PS; MESSINEO A; PALLA F; SANGUINETTI G; SCAPELLATO S; STEINBERGER J; TENCHINI R; TONELLI G; TRIGGIANI G; CARTER JM; GREEN MG; MCKEMEY AK; MARCH PV; MEDCALF T; SAICH MR; STRONG J; THOMAS RM; WILDISH T; BOTTERILL DR; CLIFFT RW; EDGECOCK TR; EDWARDS M; FISHER SM; HILL DL; JONES TJ; MCPHERSON G; MORRISSEY M; NORTON PR; SALMON DP; TAPPERN GJ; THOMPSON JC; HARVEY J; BLOCHDEVAUX B; COLAS P; KLOPFENSTEIN C; LANCON E; LOCCI E; LOUCATOS S; MIRABITO L; MONNIER E; PEREZ P; PERRIER F; PIGNARD B; RANDER J; RENARDY JF; ROUSSARIE A; SCHULLER JP; TURLAY R; ASHMAN JG; BOOTH CN; COMBLEY F; DINSDALE M; MARTIN J; PARKER D; THOMPSON LF; BRANDT S; BURKHARDT H; GRUPEN C; MEINHARD H; NEUGEBAUER E; SCHAFER U; SEYWERD H; STUPPERICH K; GOBBO B; LIELLO F; MILOTTI E; RAGUSA F; ROLANDI, LUIGI; BELLANTONI L; BOUDREAU JF; CINABRO D; CONWAY JS; COWEN DF; FENG Z; HARTON JL; HILGART J; JARED RC; JOHNSON RP; LECLAIRE BW; PAN YB; PARKER T; PATER JR; SAADI Y; SHARMA V; WEAR JA; WEBER FV; WU SL; XUE ST; ZOBERNIG G; RI Perrier Frederic/A 5953 2011 Stahl Achim/E 8846 2011 S.t. Denis Richard/C 8997 2012 Ferrante Isidoro/F 1017 2012
Contributors:	Decamp, D; Deschizeaux, B; Lees, Jp; Minard, Mn; Crespo, Jm; Delfino, M; Fernandez, E; Martinez, M; Miquel, R; Mir, Ml; Orteu, S; Pacheco, A; Perlas, Ja; Tubau, E; Catanesi, Mg; Depalma, M; Farilla, A; Iaselli, G; Maggi, G; Mastrogiacomo, A; Natali, S; Nuzzo, S; Ranieri, A; Raso, G; Romano, F; Ruggieri, F; Selvaggi, G; Silvestris, L; Tempesta, P; Zito, G; Chen, Y; Huang, D; Lin, J; Ruan, T; Wang, T; W, Wu; Xie, Y; Xu, D; Xu, R; Zhang, J; Zhao, W; Albrecht, H; Bird, F; Blucher, E; Charity, T; Drevermann, H; Garrido, L; Grab, C; Hagelberg, R; Haywood, S; Jost, B; Kasemann, M; Kellner, G; Knobloch, J; Lacourt, A; Lehraus, I; Lohse, T; Luke, D; Marchioro, A; Mato, P; May, J; Mertens, V; Minten, A; Miotto, A; Palazzi, P; Pepealtarelli, M; Ranjard, F; Richstein, J; Roth, A; Rothberg, J; Rotscheidt, H; Vonruden, W; Schlatter, D; Stdenis, R; Takashima, M; Talby, M; Taureg, H; Tejessy, W; Wachsmuth, H; Wheeler, S; Wiedenmann, W; Witzeling, W; Wotschack, J; Ajaltouni, Z; Bardadinotwinowska, M; Falvard, A; Gay, P; Henrard, P; Jousset, J; Michel, B; Montret, Jc; Pallin, D; Perret, P; Prat, J; Proriol, J; Prulhiere, F; Bertelsen, H; Hansen, F; Hansen, Jr; Hansen, Jd
Publisher Information:	Elsevier
Publication Year:	1989
Collection:	Scuola Normale Superiore: CINECA IRIS
Subject Terms:	electron positron; electron positron. annihilation; electron positron. colliding beams; electroweak interaction; experimental results; hadron; hadron. multiple production; neutrino; neutrino. flavor; Physics; Settore FIS/01 - Fisica Sperimentale
Description:	The cross-section for e + e − → hadrons in the vicinity of the Z boson peak has been measured with the ALEPH detector at the CERN Large Electron Positron collider, LEP. Measurements of the Z mass, M z = (91.174±0.070) GeV, the Z width Γ z =(2.68±0.15) GeV, and of the peak hadronic cross-section, σ had peak =(29.3±1.2) nb, are presented. With the constraints of the standard electroweak model, the number of light neutrino species is found to be N v =3.27±0.30. this results rules out of the possibility of a fourth type of light neutrino at 98% CL.
Document Type:	article in journal/newspaper
Language:	English
Relation:	info:eu-repo/semantics/altIdentifier/wos/WOS:A1989CB64600034; volume:231; issue:4; firstpage:519; lastpage:529; numberofpages:11; journal:PHYSICS LETTERS. SECTION B; https://hdl.handle.net/11384/1735
DOI:	10.1016/0370-2693(89)90704-1
Availability:	https://hdl.handle.net/11384/1735; https://doi.org/10.1016/0370-2693(89)90704-1
Rights:	info:eu-repo/semantics/openAccess ; license:Non specificata
Accession Number:	edsbas.C6F447D1
Database:	BASE