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Measurement of Z0 decays to hadrons and a precise determination of the number of neutrino species
Authors :
Adeva, B Adriani, O Aguilar-Benítez, M Akbari, H Alcaraz, J Aloisio, A Alverson, G Alviggi, M G An, Q Anderhub, H Anderson, A L Andreev, V P Angelov, T Antonov, L Antreasyan, D Arce, P Arefev, A Azemoon, T Aziz, T Baba, P V K S Bagnaia, P Bakken, J A Baksay, L Ball, R C Banerjee, S Bao, J Barone, L Bay, A Becker, U Behrens, J Beingessner, S Bencze, G L Berdugo, J Berges, P Bertucci, B Betev, B L Biland, A Bizzarri, R Blaising, J J Blömeke, P Blumenfeld, B Bobbink, Gerjan J Bocciolini, M Böhlen, W Böhm, A Böhringer, T Borgia, B Bourilkov, D Bourquin, Maurice Boutigny, D Branson, J G Brock, I C Bruyant, F Burger, J D Burq, J P Cai, X D Campana, D Camps, C Capell, M Carbonara, F Carminati, F Cartacci, A M Cerrada-Canales, M Cesaroni, F Chang, Y H Chaturvedi, U K Chemarin, M Chen, A Chen, C Chen, G M Chen, H F Chen, H S Chen, M Chen, M L Chiefari, G Chien, C Y Civinini, C Clare, I Clare, R Coignet, G Colino, N Commichau, V Conforto, G Contin, A Crijns, F Cui, X Y Dai, T S D'Alessandro, R Degré, A Deiters, K Dénes, E Denes, P De Notaristefani, F Dhina, M Diemoz, M Diez Hedo, F Dimitrov, H R Dionisi, C Dittus, F B Dolin, R M Drago, E Driever, T Duinker, P Durán, I El-Mamouni, H Engler, A Eppling, F J Erné, F C Extermann, Pierre Fabbretti, R Faber, G Falciano, S Fan, S J Fabre, M Fay, J Fehlmann, J Fenker, H C Ferguson, T Fernández, G Ferroni, F Fesefeldt, H S Field, J Forconi, G Foreman, T Freudenreich, Klaus Friebel, W Fukushima, M Gailloud, M Galaktionov, Yu Gallo, E Ganguli, S N Gau, S S Gentile, S Gettner, M Glaubman, M Goldfarb, S Gong, Z F González, E Gordeev, A Göttlicher, P Goujon, D Gratta, Giorgio Grimes, A Grinnell, C Grünewald, M W Guanziroli, M Gurtu, A Güsewell, D Haan, H Hancke, S Hangarter, K Harris, M Harting, D Hartjes, F G Hasan, A He, C F Heavey, A Hebbeker, T Hebert, M Herten, G Herten, U Hervé, A Hilgers, K Hofer, H Hsu, L S Hu, G Hu, G Q Ille, B Ilyas, M M Innocente, Vincenzo Isiksal, E Jagel, E Jakobs, C Jin, B N Jones, L W Kaaret, P E Khan, R A Kamyshkov, Yu A Kaplan, D Karyotakis, Yu Khoze, V Kirkby, D Kittel, E W Klimentov, A Klok, P F König, A C Kornadt, O Koutsenko, V F Krämer, R W Kramer, T Krastev, V R Krenz, W Krizmanic, J F Kuhn, A Kumar, V Kunin, A Kwan, S Lalieu, V Landi, G Lanius, Karl Lanske, D Lanzano, S Lebrun, P Lecomte, P Lecoq, P Le Coultre, P Leedom, I D Le Goff, J M Leistam, L Leiste, R Lenti, M Lettry, Jacques Levchenko, P M Leytens, X Li Chuan Li, H T Li, J F Li, L Li, P J Li, X G Liao, J Y Liu, R Liu, Y Lin, Z Y Linde, Frank L Linnhöfer, D Lohmann, W Lökös, S Longo, E Lü, Y S Lubbers, J M Lübelsmeyer, K Luci, C Luckey, D Ludovici, L Lue, X Luminari, L Ma Wen Gan MacDermott, M Magahiz, R Maire, M Malhotra, P K Malinin, A Maña, C Mao, D N Mao, Y F Maolinbay, M Marchesini, P A Marchionni, A Martin, J P Martínez, L Marzano, F Massaro, G G G Matsuda, T Mazumdar, K McBride, P McMahon, T Meinholz, T Merk, M Merola, L Meschini, M Metzger, W J Mi, Y Micke, M Micke, U Mills, G B Mir, Y Mirabelli, G Mnich, J Möller, M Montanet, Lucien Monteleoni, B Morand, G Morand, R Morganti, S Morgunov, V Mount, R Nagy, E Napolitano, M Newman, H Niessen, L Nowak, Wolf-Dieter Onvlee, J Pandoulas, D Paternoster, G Patricelli, S Pei, Y J Peng, Y Perret-Gallix, D Perrier, J Perrin, E Pevsner, A Pieri, M Piroué, P A Plyaskin, V Pohl, M Pozhidaev, V Pols, C L A Produit, N Qian, J M Qureshi, K N Raghavan, R Rahal-Callot, G Razis, P A Read, K Ren, D Ren, Z Reucroft, S Riemann, Tord Rippich, C Rodríguez, S Roe, B P Röhner, M Rombach, T Romero, L Rose, J Rosier-Lees, S Rosselet, P Rubio, Juan Antonio Rückstuhl, W Rykaczewski, H Sachwitz, M Salicio, J Sartorelli, G Sauvage, G Savin, A Shchegelskii, V Schmitz, D Schmitt, P Schmitz, P Schneegans, M Schöntag, M Schopper, Herwig Franz Schotanus, D J Schreiber, H J Schulte, R Schulte, S Schultze, K Schütte, J Schwenke, J Schwering, G Sciacca, C Seiler, P G Sens, Johannes C Sheer, I Shevchenko, S Shevchenko, V Shi, X R Shmakov, K D Shoutko, V Shumilov, E Smirnov, N Sopczak, André Souyri, C Spickermann, T Spiess, B Spillantini, P Starosta, R Steuer, M Stickland, D P Stöhr, B Stone, H Strauch, K Sudhakar, K Sumner, R L Suter, H Sutton, R B Swain, J D Syed, A A Tang, X W Tarkovsky, E Thénard, J M Thomas, E Timmermans, C Ting, Samuel C C Ting, S M Tong, Y P Tonutti, M Tonwar, S C Tóth, J Tung, K L Ulbricht, J Urbàn, L Uwer, U Valente, E Van de Walle, R T van der Graaf, H Vetlitskii, I Viertel, Gert M Vikas, P Vivargent, M Vogel, H Vogt, H Vollmar, M von Dardel, Guy F Vorobev, I Vorobyov, A A Vuilleumier, L Walk, W Wallraff, W Wang, C R Wang, G H Wang, J H Wang, Q F Wang, X L Wang, Y F Wang, Z M Weber, J Weill, R Wenaus, T J Wenninger, J White, M Wilhelm, R Willmott, C Wittgenstein, F Wright, D Wu, R J Wu Sau Lan Wu, S X Wu, Y G Wyslouch, B Xu, Y D Xu, Z Z Xue, Z L Yan, D S Yang, B Z Yang, C G Yang, G Yang, K S Yang, Q Y Yang, Z Q Ye, C H Ye, Q Yeh, S C Yin, Z W You, J M Zabounidis, C R Zehnder, L Zeng, M Zeng, Y Zhang, D Zhang, D H Zhang, S Y Zhang, Z P Zhou, J F Zhu, R Y Zichichi, Antonino Zoll, Julius IHEF (IoP, FNWI) Laboratoire d'Annecy de Physique des Particules (LAPP) Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS) Institut de Physique Nucléaire de Lyon (IPNL) Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3) L3 B., Adeva O., Adriani M., Aguilarbenitez H., Akbari J., Alcaraz Aloisio, Alberto G., Alverson Alviggi, Mariagrazia Q., An H., Anderhub A. L., Anderson V. P., Andreev T., Angelov L., Antonov D., Antreasyan A., Arefiev T., Azemoon T., Aziz P. V., K. P., Bagnaia J. A., Bakken L., Baksay R. C., Ball S., Banerjee J., Bao L., Barone A., Bay U., Becker S., Beingessner G. L., Bencze J., Berdugo P., Berge B., Bertucci B. L., Betev A., Biland R., Bizzarri J. J., Blaising P., Blomeke B., Blumenfeld G. J., Bobbink M., Bocciolini W., Bohlen A., Bohm T., Bohringer B., Borgia D., Bourilkov M., Bourquin D., Boutigny J. G., Branson I. C., Brock F., Bruyant J. D., Burger J. P., Burq X. D., Cai D., Campana C., Camp M., Capell F., Carbonara F., Carminati A. M., Cartacci M., Cerrada F., Cesaroni Y. H., Chang U. K., Chaturvedi M., Chemarin A., Chen C., Chen G. M., Chen H. F., Chen H. S., Chen M., Chen M. L., Chen Chiefari, Giovanni C. Y., Chien C., Civinini I., Clare R., Clare G., Coignet N., Colino V., Commichau G., Conforto A., Contin F., Crijn X. Y., Cui T. S., Dai R., Dalessandro A., Degre K., Deiter E., Dene P., Dene F., Denotaristefani M., Dhina M., Diemoz H. R., Dimitrov C., Dionisi F., Dittu R., Dolin E., Drago T., Driever P., Duinker I., Duran A., Engler F. J., Eppling F. C., Erne P., Extermann R., Fabbretti G., Faber S., Falciano S. J., Fan M., Fabre J., Fay J., Fehlmann H., Fenker T., Ferguson G., Fernandez F., Ferroni H., Fesefeldt J., Field G., Forconi T., Foreman K., Freudenreich W., Friebel M., Fukushima M., Gailloud Y., Galaktionov E., Gallo S. N., Ganguli S. S., Gau S., Gentile M., Gettner M., Glaubman S., Goldfarb Z. F., Gong E., Gonzalez A., Gordeev P., Gottlicher D., Goujon C., Goy G., Gratta A., Grime C., Grinnell M., Gruenewald M., Guanziroli A., Gurtu D., Gusewell H., Haan S., Hancke K., Hangarter M., Harri D., Harting F. G., Hartje C. F., He A., Heavey T., Hebbeker M., Hebert G., Herten U., Herten A., Herve K., Hilger H., Hofer L. S., Hsu G., Hu G. Q., Hu B., Ille M. M., Ilya V., Innocente E., Isiksal E., Jagel C., Jakob B. N., Jin L. W., Jone P., Kaaret R. A., Khan Y., Kamyshkov D., Kaplan Y., Karyotaki V., Khoze D., Kirkby W., Kittel A., Klimentov P. F., Klok A. C., Konig O., Kornadt V., Koutsenko R. W., Kraemer T., Kramer V. R., Krastev W., Krenz A., Kuhn V., Kumar A., Kunin S., Kwan V., Lalieu G., Landi K., Laniu D., Lanske S., Lanzano P., Lebrun P., Lecomte P., Lecoq P., Lecoultre I., Leedom J. M., Legoff L., Leistam R., Leiste J., Lettry P. M., Levchenko X., Leyten C., Li H. T., Li J. F., Li L., Li P. J., Li X. G., Li J. Y., Liao R., Liu Y., Liu Z. Y., Lin F. L., Linde D., Linnhofer W., Lohmann S., Loko E., Longo Y. S., Lu J. M., Lubber K., Lubelsmeyer C., Luci D., Luckey L., Ludovici X., Lue L., Luminari W. G., Ma M., Macdermott R., Magahiz M., Maire P. K., Malhotra A., Malinin C., Mana D. N., Mao Y. F., Mao M., Maolinbay P., Marchesini A., Marchionni J. P., Martin L., Martinez F., Marzano G. G., G. T., Matsuda K., Mazumdar P., Mcbride T., Meinholz M., Merk Merola, Leonardo M., Meschini W. J., Metzger Y., Mi M., Micke U., Micke G. B., Mill Y., Mir G., Mirabelli J., Mnich L., Montanet B., Monteleoni G., Morand R., Morand S., Morganti V., Morgunov R., Mount E., Nagy Napolitano, Marco H., Newman L., Niessen W. D., Nowak J., Onvlee D., Pandoula Paternoster, Giovanni Patricelli, Sergio Y. J., Pei Y., Peng D., Perretgallix J., Perrier E., Perrin A., Pevsner M., Pieri P. A., Piroue V., Plyaskin M., Pohl V., Pojidaev C. L., A. N., Produit J. M., Qian K. N., Qureshi R., Raghavan G., Rahalcallot P., Razi K., Read D., Ren Z., Ren S., Reucroft T., Riemann C., Rippich S., Rodriguez B. P., Roe M., Rohner T., Rombach L., Romero J., Rose S., Rosierlee P., Rosselet J. A., Rubio W., Ruckstuhl H., Rykaczewski M., Sachwitz J., Salicio G., Sauvage A., Savin V., Schegelsky P., Schmitt D., Schmitz P., Schmitz M., Schneegan M., Schontag H., Schopper D. J., Schotanu H. J., Schreiber R., Schulte S., Schulte K., Schultze J., Schutte J., Schwenke G., Schwering Sciacca, Crisostomo P. G., Seiler J. C., Sen I., Sheer V., Shevchenko S., Shevchenko X. R., Shi K., Shmakov V., Shoutko E., Shumilov N., Smirnov A., Sopczak C., Souyri T., Spickermann B., Spie P., Spillantini R., Starosta M., Steuer D. P., Stickland B., Stohr H., Stone K., Strauch K., Sudhakar R. L., Sumner H., Suter R. B., Sutton A. A., Syed X. W., Tang E., Tarkovsky J. M., Thenard E., Thoma C., Timmerman S. C., C. S. M., Ting Y. P., Tong M., Tonutti S. C., Tonwar J., Toth K. L., Tung J., Ulbricht L., Urban U., Uwer E., Valente R. T., Vandewalle H., Vandergraaf I., Vetlitsky G., Viertel P., Vika M., Vivargent H., Vogel H., Vogt M., Vollmar G., Vondardel I., Vorobiev A. A., Vorobyov L., Vuilleumier W., Walk W., Wallraff C. R., Wang G. H., Wang J. H., Wang Q. F., Wang X. L., Wang Y. F., Wang Z. M., Wang J., Weber R., Weill T. J., Wenau J., Wenninger M., White R., Wilhelm C., Willmott F., Wittgenstein D., Wright R. J., Wu S. L., Wu S. X., Wu Y. G., Wu B., Wyslouch Z. Z., Xu Z. L., Xue D. S., Yan B. Z., Yang C. G., Yang G., Yang K. S., Yang Q. Y., Yang Z. Q., Yang Q., Ye C. H., Ye S. C., Yeh Z. W., Yin J. M., You C., Zabounidi L., Zehnder M., Zeng Y., Zeng D., Zhang D. H., Zhang S. Y., Zhang Z. P., Zhang J. F., Zhou R. Y., Zhu A., Zichichi J., Zoll
Source :
Physics Letters B, 237, 136-146. Elsevier, Physics Letters B, Physics Letters B, Elsevier, 1991, 270, pp.136-146, Physics Letters B, Elsevier, 1990, 237, pp.136-146, ResearcherID
Publication Year :
1990
Abstract
We have made a precise measurement of the cross section for e+e−→Z0→hadrons with the L3 detector at LEP, covering the s range from 88.28 to 95.04 GeV. From a fit to the Z0 mass, total width, and the hadronic cross section to be MZ0=91.160 ± 0.024 (experiment) ±0.030(LEP) GeV, ΓZ0=2.539±0.054 GeV, and σh(MZ0)=29.5±0.7 nb. We also used the fit to the Z0 peak cross section and the width todetermine Γinvisible=0.548±0.029 GeV, which corresponds to 3.29±0.17 species of light neutrinos. The possibility of four or more neutrino flavors is thus ruled out at the 4σ confidence level.
Details
ISSN :
03702693
Database :
OpenAIRE
Journal :
Physics Letters B, 237, 136-146. Elsevier, Physics Letters B, Physics Letters B, Elsevier, 1991, 270, pp.136-146, Physics Letters B, Elsevier, 1990, 237, pp.136-146, ResearcherID
Accession number :
edsair.doi.dedup.....42aa442e9dd653ee81d97c9fb57fe19a