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Tests of the Standard Model and constraints on new physics from measurements of fermion-pair production at 183 GeV at LEP

Cross-sections for hadronic, b-bbar and lepton pair final states in e+e- collisions at sqrt(s) = 183 GeV, measured with the OPAL detector at LEP, are presented and compared with the predictions of the Standard Model. Forward-backward asymmetries for the leptonic final states have also been measured....

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Detalles Bibliográficos
Autores principales: Abbiendi, G., Ackerstaff, K., Alexander, G., Allison, John, Altekamp, N., Anderson, K.J., Anderson, S., Arcelli, S., Asai, S., Ashby, S.F., Axen, D., Azuelos, G., Ball, A.H., Barberio, E., Barlow, Roger J., Bartoldus, R., Batley, J.R., Baumann, S., Bechtluft, J., Behnke, T., Bell, Kenneth Watson, Bella, G., Bellerive, A., Bentvelsen, S., Bethke, S., Betts, S., Biebel, O., Biguzzi, A., Bird, S.D., Blobel, V., Bloodworth, I.J., Bobinski, M., Bock, P., Bohme, J., Bonacorsi, D., Boutemeur, M., Braibant, S., Bright-Thomas, P., Brigliadori, L., Brown, Robert M., Burckhart, H.J., Burgard, C., Burgin, R., Capiluppi, P., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, David G., Chrisman, D., Ciocca, C., Clarke, P.E.L., Clay, E., Cohen, I., Conboy, J.E., Cooke, O.C., Couyoumtzelis, C., Coxe, R.L., Cuffiani, M., Dado, S., Dallavalle, G.Marco, Davis, R., De Jong, S., del Pozo, L.A., De Roeck, A., Desch, K., Dienes, B., Dixit, M.S., Dubbert, J., Duchovni, E., Duckeck, G., Duerdoth, I.P., Eatough, D., Estabrooks, P.G., Etzion, E., Evans, H.G., Fabbri, F., Fanti, M., Faust, A.A., Fiedler, F., Fierro, M., Fleck, I., Folman, R., Furtjes, A., Futyan, D.I., Gagnon, P., Gary, J.W., Gascon, J., Gascon-Shotkin, S.M., Gaycken, G., Geich-Gimbel, C., Giacomelli, G., Giacomelli, P., Gibson, V., Gibson, W.R., Gingrich, D.M., Glenzinski, D., Goldberg, J., Gorn, W., Grandi, C., Gross, E., Grunhaus, J., Gruwe, M., Hanson, G.G., Hansroul, M., Hapke, M., Harder, K., Hargrove, C.K., Hartmann, C., Hauschild, M., Hawkes, C.M., Hawkings, R., Hemingway, R.J., Herndon, M., Herten, G., Heuer, R.D., Hildreth, M.D., Hill, J.C., Hillier, S.J., Hobson, P.R., Hocker, James Andrew, Homer, R.J., Honma, A.K., Horvath, D., Hossain, K.R., Howard, R., Huntemeyer, P., Igo-Kemenes, P., Imrie, D.C., Ishii, K., Jacob, F.R., Jawahery, A., Jeremie, H., Jimack, M., Jones, C.R., Jovanovic, P., Junk, T.R., Karlen, D., Kartvelishvili, V., Kawagoe, K., Kawamoto, T., Kayal, P.I., Keeler, R.K., Kellogg, R.G., Kennedy, B.W., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Koetke, D.S., Kokott, T.P., Kolrep, M., Komamiya, S., Kowalewski, Robert V., Kress, T., Krieger, P., von Krogh, J., Kuhl, T., Kyberd, P., Lafferty, G.D., Lanske, D., Lauber, J., Lautenschlager, S.R., Lawson, I., Layter, J.G., Lazic, D., Lee, A.M., Lellouch, D., Letts, J., Levinson, L., Liebisch, R., List, B., Littlewood, C., Lloyd, A.W., Lloyd, S.L., Loebinger, F.K., Long, G.D., Losty, M.J., Ludwig, J., Lui, D., Macchiolo, A., Macpherson, A., Mader, W., Mannelli, M., Marcellini, S., Markopoulos, C., Martin, A.J., Martin, J.P., Martinez, G., Mashimo, T., Mattig, Peter, McDonald, W.John, McKenna, J., Mckigney, E.A., McMahon, T.J., McPherson, R.A., Meijers, F., Menke, S., Merritt, F.S., Mes, H., Meyer, J., Michelini, A., Mihara, S., Mikenberg, G., Miller, D.J., Mir, R., Mohr, W., Montanari, A., Mori, T., Nagai, K., Nakamura, I., Neal, H.A., Nellen, B., Nisius, R., O'Neale, S.W., Oakham, F.G., Odorici, F., Ogren, H.O., Oreglia, M.J., Orito, S., Palinkas, J., Pasztor, G., Pater, J.R., Patrick, G.N., Patt, J., Perez-Ochoa, R., Petzold, S., Pfeifenschneider, P., Pilcher, J.E., Pinfold, J., Plane, David E., Poffenberger, P., Polok, J., Przybycien, M., Rembser, C., Rick, H., Robertson, S., Robins, S.A., Rodning, N., Roney, J.M., Roscoe, K., Rossi, A.M., Rozen, Y., Runge, K., Runolfsson, O., Rust, D.R., Sachs, K., Saeki, T., Sahr, O., Sang, W.M., Sarkisian, E.K.G., Sbarra, C., Schaile, A.D., Schaile, O., Scharf, F., Scharff-Hansen, P., Schieck, J., Schmitt, B., Schmitt, S., Schoning, A., Schroder, Matthias, Schumacher, M., Schwick, C., Scott, W.G., Seuster, R., Shears, T.G., Shen, B.C., Shepherd-Themistocleous, C.H., Sherwood, P., Siroli, G.P., Sittler, A., Skuja, A., Smith, A.M., Snow, G.A., Sobie, R., Soldner-Rembold, S., Sproston, M., Stahl, A., Stephens, K., Steuerer, J., Stoll, K., Strom, David M., Strohmer, R., Surrow, B., Talbot, S.D., Tanaka, S., Taras, P., Tarem, S., Teuscher, R., Thiergen, M., Thomson, M.A., von Torne, E., Torrence, E., Towers, S., Trigger, I., Trocsanyi, Z., Tsur, E., Turcot, A.S., Turner-Watson, M.F., Van Kooten, Rick J., Vannerem, P., Verzocchi, M., Voss, H., Wackerle, F., Wagner, A., Ward, C.P., Ward, D.R., Watkins, P.M., Watson, A.T., Watson, N.K., Wells, P.S., Wermes, N., White, J.S., Wilson, G.W., Wilson, J.A., Wyatt, T.R., Yamashita, S., Yekutieli, G., Zacek, V., Zer-Zion, D.
Lenguaje:eng
Publicado: 1998
Materias:
Acceso en línea:https://dx.doi.org/10.1007/s100529801027
https://dx.doi.org/10.1007/s100520050318
http://cds.cern.ch/record/362994
Descripción
Sumario:Cross-sections for hadronic, b-bbar and lepton pair final states in e+e- collisions at sqrt(s) = 183 GeV, measured with the OPAL detector at LEP, are presented and compared with the predictions of the Standard Model. Forward-backward asymmetries for the leptonic final states have also been measured. Cross-sections and asymmetries are also presented for data recorded in 1997 at sqrt(s) = 130 and 136 GeV. The results are used to measure the energy dependence of the electromagnetic coupling constant alpha_em, and to place limits on new physics as described by four-fermion contact interactions or by the exchange of a new heavy particle such as a leptoquark, or of a squark or sneutrino in supersymmetric theories with R-parity violation.