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1. Polarization and forward-backward asymmetry of $\Lambda$ baryons in hadronic Z $^0$ decays

Author: Ackerstaff, K, Alexander, G, Allison, J, Altekamp, N, Anderson, KJ, Anderson, S, Arcelli, S, Asai, S, Axen, D, Azuelos, G, Ball, AH, Gorn, W, Grandi, C, Gross, E, Grunhaus, J, Gruwe, M, Hajdu, C, Hanson, GG, Hansroul, M, Hapke, M, Hargrove, CK, Barberio, E, Hart, PA, Hartmann, C, Hauschild, M, Hawkes, CM, Hawkins, R, Hemingway, RJ, Herndon, M, Herten, G, Heuer, RD, Hildreth, MD, Barlow, RJ, Hill, JC, Hillier, SJ, Hobson, PR, Homer, RJ, Honma, AK, Horvath, D, Hossain, KR, Howard, R, Huntemeyer, P, Hutchcroft, DE, Bartoldus, R, Igo-Kemenes, P, Imrie, DC, Ingram, MR, Ishii, K, Jawahery, A, Jeffreys, PW, Jeremie, H, Jimack, M, Joly, A, Jones, CR, Batley, JR, Jones, G, Jones, M, Jost, U, Jovanovic, P, Junk, TR, Karlen, D, Kartvelishvili, V, Kawagoe, K, Kawamoto, T, Kayal, PI, Baumann, S, Keeler, RK, Kellogg, RG, Kennedy, BW, Kirk, J, Klier, A, Kluth, S, Kobayashi, T, Kobel, M, Koetke, DS, Kokott, TP, Bechtluft, J, Kolrep, M, Komamiya, S, Kress, T, Krieger, P, von Krogh, J, Kyberd, P, Lafferty, GD, Lahmann, R, Lai, WP, Lamarche, F, Beeston, C, Lanske, D, Lauber, J, Lautenschlager, SR, Layter, JG, Lazic, D, Lee, AM, Lefebvre, E, Lellouch, D, Letts, J, Levinson, L, Behnke, T, Lloyd, SL, Loebinger, FK, Long, GD, Losty, MJ, Ludwig, J, Macchiolo, A, Macpherson, A, Mannelli, M, Marcellini, S, Markus, C, Bell, AN, Martin, AJ, Martin, JP, Martinez, G, Mashimo, T, Mattig, P, McDonald, WJ, McKenna, J, Mckigney, EA, McMahon, TJ, McPherson, RA, Bell, KW, Meijers, F, Menke, S, Merritt, FS, Mes, H, Meyer, J, Michelini, A, Mikenberg, G, Miller, DJ, Mincer, A, Mir, R, Bella, G, Mohr, W, Montanari, A, Mori, T, Morii, M, Muller, U, Mihara, S, Nagai, K, Nakamura, I, Neal, HA, Nellen, B, Bentvelsen, S, Nisius, R, O'Neale, SW, Oakham, FG, Odorici, F, Ogren, HO, Oh, A, Oldershaw, NJ, Oreglia, MJ, Orito, S, Palinkas, J, Bethke, S, Pasztor, G, Pater, JR, Patrick, GN, Patt, J, Pearce, MJ, Perez-Ochoa, R, Petzold, S, Pfeifenschneider, P, Pilcher, JE, Pinfold, J, Biebel, O, Plane, DE, Poffenberger, P, Poli, B, Posthaus, A, Rees, DL, Rigby, D, Robertson, S, Robins, SA, Rodning, N, Roney, JM, Biguzzi, A, Rooke, A, Ros, E, Rossi, AM, Routenburg, P, Rozen, Y, Runge, K, Runolfsson, O, Ruppel, U, Rust, DR, Rylko, R, Bird, SD, Sachs, K, Saeki, T, Sarkisyan, EKG, Sbarra, C, Schaile, AD, Schaile, O, Scharf, F, Scharff-Hansen, P, Schenk, P, Schieck, J, Blobel, V, Schleper, P, Schmitt, B, Schmitt, S, Schoning, A, Schroder, M, Schultz-Coulon, HC, Schumacher, M, Schwick, C, Scott, WG, Shears, TG, Bloodworth, IJ, Shen, BC, Shepherd-Themistocleous, CH, Sherwood, P, Siroli, GP, Sittler, A, Skillman, A, Skuja, A, Smith, AM, Snow, GA, Sobie, R, Bloomer, JE, Soldner-Rembold, S, Springer, RW, Sproston, M, Stephens, K, Steuerer, J, Stockhausen, B, Stoll, K, Strom, D, Szymanski, P, Tafirout, R, Bobinski, M, Talbot, SD, Tanaka, S, Taras, P, Tarem, S, Teuscher, R, Thiergen, M, Thomson, MA, von Torne, E, Towers, S, Trigger, I, Bock, P, Trocsanyi, Z, Tsur, E, Turcot, AS, Turner-Watson, MF, Utzat, P, Van Kooten, R, VanDenPlas, D, Verzocchi, M, Vikas, P, Vokurka, EH, Bonacorsi, D, Voss, H, Wackerle, F, Wagner, A, Ward, CP, Ward, DR, Watkins, PM, Watson, AT, Watson, NK, Wells, PS, Wermes, N, Boutemeur, M, White, JS, Wilkems, B, Wilson, GW, Wilson, JA, Wolf, G, Wyatt, TR, Yamashita, S, Yekutieli, G, Zacek, W, Zer-Zion, D, Bouwens, BT, OPAL Collaboration, Braibant, S, Brigliadori, L, Brown, RM, Burckhart, HJ, Burgard, C, Burgin, R, Capiluppi, P, Carnegie, RK, Carter, AA, Carter, JR, Chang, CY, Charlton, DG, Chrisman, D, Clarke, PEL, Cohen, I, Conboy, JE, Cooke, OC, Cuffani, M, Dado, S, Dallapiccola, C, Dallavalle, GM, Davis, R, De Jong, S, del Pozo, LA, Desch, K, Dienes, B, Dixit, MS, Silva, EDE, Doucet, M, Duchovni, E, Duckeck, G, Duerdoth, IP, Eatough, D, Edwards, JEG, Estabrooks, PG, Evans, HG, Evans, M, Fabbri, F, Fanti, M, Faust, AA, Fiedler, F, Fierro, M, Fischer, HM, Fleck, I, Folman, R, Fong, DG, Foucher, M, Furtjes, A, Futyan, DI, Gagnon, P, Gary, JW, Gascon, J, Gascon-Shotkin, SM, Geddes, NI, Geich-Gimbel, C, Geralis, T, Giacomelli, G, Giacomelli, P, Giacomelli, R, Gibson, V, Gibson, WR, Gingrich, DM, Glenzinski, D, Goldberg, J, and Goodrick, MJ
Subjects: Particle physics, Physics and Astronomy (miscellaneous), LUND MONTE-CARLO, media_common.quotation_subject, Hadron, Lambda baryon, Lambda, 01 natural sciences, Asymmetry, High momentum, JET FRAGMENTATION, 0103 physical sciences, Nuclear Experiment, 010306 general physics, DETECTOR, Engineering (miscellaneous), media_common, Physics, E+E-PHYSICS, 010308 nuclear & particles physics, LEP, Polarization (waves), Hadronization, Transverse plane, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract: The longitudinal polarization, the transverse polarization, and the forward-backward asymmetry of Lambda baryons have been measured using a sample of 4.34 million hadronic Z^0 decays collected with the OPAL detector at LEP between 1990 and 1995. These results are important as an aid to the understanding of hadronization mechanisms. Significant longitudinal polarization has been observed at intermediate and high momentum. For x_E = 2 E_{Lambda}/\sqrt{s}) > 0.3, the longitudinal polarization has been measured to be -32.9 +/- 5.5(stat) +/- 5.2(syst)%. We have observed no transverse polarization. A significant forward-backward asymmetry has been measured and can be described by a JETSET model. The longitudinal polarization, the transverse polarization, and the forward-backward asymmetry of Lambda baryons have been measured using a sample of 4.34 million hadronic Z^0 decays collected with the OPAL detector at LEP between 1990 and 1995. These results are important as an aid to the understanding of hadronization mechanisms. Significant longitudinal polarization has been observed at intermediate and high momentum. For x_E = 2 E_{Lambda}/\sqrt{s}) > 0.3, the longitudinal polarization has been measured to be -32.9 +/- 5.5(stat) +/- 5.2(syst)%. We have observed no transverse polarization. A significant forward-backward asymmetry has been measured and can be described by a JETSET model.
Published: 1998

2. Precision Luminosity for Z0 Lineshape Measurements with a Silicon-Tungsten Calorimeter

Author: Abbiendi, G, Ackerstaff, K, Alexander, G, Allison, J, Anderson, KJ, Anderson, S, Arcelli, S, Asai, S, Ashby, SF, Axen, D, Azuelos, G, Graham, K, Gross, E, Grunhaus, J, Gruwe, M, Hajdu, C, Hanson, GG, Hansroul, M, Hapke, M, Harder, K, Harel, A, Ball, AH, Hargrove, CK, Harin-Dirac, M, Hart, P, Hauschild, M, Hawkes, CM, Hawkings, R, Hemingway, RJ, Herten, G, Heuer, RD, Hildreth, MD, Barberio, E, Hill, JC, Hillier, S, Hobson, PR, Hocker, A, Hoffman, K, Homer, RJ, Honma, AK, Horvath, D, Hossain, KR, Howard, R, Barlow, RJ, Huntemeyer, P, Igo-Kemenes, P, Imrie, DC, Ishii, K, Jacob, FR, Jawahery, A, Jeremie, H, Jimack, M, Jones, CR, Jovanovic, P, Batley, JR, Junk, TR, Kanaya, N, Kanzaki, J, Karlen, D, Kartvelishvili, V, Kawagoe, K, Kawamoto, T, Kayal, PI, Keeler, RK, Kellogg, RG, Baumann, S, Kennedy, BW, Kim, DH, Kirk, J, Klier, A, Kobayashi, T, Kobel, M, Kokott, TP, Kolrep, M, Komamiya, S, Kowalewski, RV, Bechtluft, J, Kress, T, Krieger, P, von Krogh, J, Kuhl, T, Kyberd, P, Lai, WP, Lafferty, GD, Lahmann, R, Landsman, H, Lanske, D, Behnke, T, Lauber, J, Lawson, I, Layter, JG, Lee, AM, Lellouch, D, Letts, J, Levinson, L, Liebisch, R, Lillich, J, List, B, Bell, KW, Littlewood, C, Lloyd, AW, Lloyd, SL, Loebinger, FK, Long, GD, Losty, MJ, Lu, J, Ludwig, J, Liu, D, Macchiolo, A, Bella, G, Macpherson, A, Mader, W, Mannelli, M, Marcellini, S, Marchant, TE, Martin, AJ, Martin, JP, Martinez, G, Mashimo, T, Mattig, P, Bellerive, A, McDonald, WJ, McKenna, J, Mckigney, EA, McMahon, TJ, McPherson, RA, Meijers, F, Mendez-Lorenzo, P, Menke, S, Merritt, FS, Mes, H, Bentvelsen, S, Meyer, I, Michelini, A, Mihara, S, Mikenberg, G, Miller, DJ, Mohr, W, Montanari, A, Mori, T, Muller, U, Nagai, K, Bethke, S, Nakamura, I, Neal, HA, Nisius, R, O'Neale, SW, Oakham, FG, Odorici, F, Ogren, HO, Okpara, A, Oreglia, MJ, Orito, S, Betts, S, Palmonari, F, Pasztor, G, Pater, JR, Patrick, GN, Patt, J, Perez-Ochoa, R, Petzold, S, Pfeifenschneider, P, Pilcher, JE, Pinfold, J, Biebel, O, Plane, DE, Poffenberger, P, Poli, B, Polok, J, Przybycien, M, Quadt, A, Raith, B, Rembser, C, Rick, H, Robertson, S, Biguzzi, A, Robins, SA, Rodning, N, Roney, JM, Rosati, S, Roscoe, K, Rossi, AM, Rozen, Y, Runge, K, Runolfsson, O, Rust, DR, Bloodworth, IJ, Sachs, K, Saeki, T, Sahr, O, Sang, WM, Sarkisyan, EKG, Sbarra, C, Schaile, AD, Schaile, O, Scharff-Hansen, P, Schieck, J, Bock, P, Schmitt, B, Schmitt, S, Schoning, A, Schroder, M, Schumacher, M, Schwick, C, Scott, WG, Seuster, R, Shears, TG, Shen, BC, Bohme, J, Shepherd-Themistocleous, CH, Sherwood, P, Siroli, GP, Skuja, A, Smith, AM, Snow, GA, Sobie, R, Soldner-Rembold, S, Spagnolo, S, Springer, W, Boeriu, O, Sproston, M, Stahl, A, Stephens, K, Stoll, K, Strom, D, Strohmer, R, Surrow, B, Talbot, SD, Taras, P, Tarem, S, Bonacorsi, D, Tecchio, M, Teuscher, R, Thiergen, M, Thomas, J, Thomson, MA, Torrence, E, Towers, S, Trefzger, T, Trigger, I, Trocsanyi, Z, Boutemeur, M, Tsur, E, Turner-Watson, MF, Ueda, I, Van Kooten, R, Vannerem, P, Verzocchi, M, Voss, H, Wackerle, F, Wagner, A, Wagner, D, Braibant, S, Waller, D, Ward, CP, Ward, DR, Watkins, PM, Watson, AT, Watson, NK, Wells, PS, Wermes, N, Wetterling, D, White, JS, Bright-Thomas, P, Wilson, GW, Wilson, JA, Wyatt, TR, Yamashita, S, Zacek, V, Zer-Zion, D, OPAL Collaboration, Brigliadori, L, Brown, RM, Burckhart, HJ, Capiluppi, P, Carnegie, RK, Carter, AA, Carter, JR, Chang, CY, Charlton, DG, Chrisman, D, Ciocca, C, Clarke, PEL, Clay, E, Cohen, I, Conboy, JE, Cooke, OC, Couchman, J, Couyoumtzelis, C, Coxe, RL, Cuffiani, M, Dado, S, Dallavalle, GM, Dallison, S, Darling, C, Davis, R, De Jong, S, de Roeck, A, Dervan, P, Desch, K, Dienes, B, Dixit, MS, Donkers, M, Dubbert, J, Duchovni, E, Duckeck, G, Duerdoth, IP, Estabrooks, PG, Etzion, E, Evans, H, Fabbri, F, Fanfani, A, Fanti, M, Faust, AA, Feld, L, Ferrari, P, Fiedler, F, Fierro, M, Fleck, I, Foucher, M, Frey, A, Furtjes, A, Futyan, DI, Gagnon, P, Gary, JW, Gascon-Shotkin, S, Gaycken, G, Geich-Gimbel, C, Giacomelli, G, Giacomelli, P, Giacomelli, R, Gibson, WR, Gingrich, DM, Glenzinski, D, Goldberg, J, Gorn, W, Grandi, C, G., Abbiendi, K., Ackerstaff, G., Alexander, J., Allison, K. J., Anderson, S., Anderson, S., Arcelli, S., Asai, S. F., Ashby, D., Axen, G., Azuelo, A. H., Ball, E., Barberio, R. J., Barlow, J. R., Batley, S., Baumann, J., Bechtluft, T., Behnke, K. W., Bell, G., Bella, A., Bellerive, S., Bentvelsen, S., Bethke, S., Bett, O., Biebel, A., Biguzzi, I. J., Bloodworth, P., Bock, J., Bohme, O., Boeriu, D., Bonacorsi, M., Boutemeur, S., Braibant, P., Bright Thoma, L., Brigliadori, R. M., Brown, H. J., Burckhart, P., Capiluppi, R. K., Carnegie, A. A., Carter, J. R., Carter, C. Y., Chang, D. G., Charlton, D., Chrisman, C., Ciocca, P. E., L., E., Clay, I., Cohen, J. E., Conboy, O. C., Cooke, J., Couchman, C., Couyoumtzeli, R. L., Coxe, M., Cuffiani, S., Dado, G. M., Dallavalle, S., Dallison, C., Darling, R., Davi, S., De Jong, A., de Roeck, P., Dervan, K., Desch, B., Diene, M. S., Dixit, M., Donker, J., Dubbert, E., Duchovni, G., Duckeck, I. P., Duerdoth, P. G., Estabrook, E., Etzion, H., Evan, F., Fabbri, A., Fanfani, M., Fanti, A. A., Faust, L., Feld, P., Ferrari, F., Fiedler, M., Fierro, I., Fleck, M., Foucher, A., Frey, A., Furtje, D. I., Futyan, P., Gagnon, J. W., Gary, S., Gascon Shotkin, G., Gaycken, C., Geich Gimbel, G., Giacomelli, P., Giacomelli, R., Giacomelli, W. R., Gibson, D. M., Gingrich, D., Glenzinski, J., Goldberg, W., Gorn, C., Grandi, K., Graham, E., Gro, J., Grunhau, M., Gruwe, C., Hajdu, G. G., Hanson, M., Hansroul, M., Hapke, K., Harder, A., Harel, C. K., Hargrove, M., Harin Dirac, P., Hart, M., Hauschild, C. M., Hawke, R., Hawking, R. J., Hemingway, G., Herten, R. D., Heuer, M. D., Hildreth, J. C., Hill, S., Hillier, P. R., Hobson, A., Hocker, K., Hoffman, R. J., Homer, A. K., Honma, D., Horvath, K. R., Hossain, R., Howard, P., Huntemeyer, P., Igo Kemene, D. C., Imrie, K., Ishii, F. R., Jacob, A., Jawahery, H., Jeremie, M., Jimack, C. R., Jone, P., Jovanovic, T. R., Junk, N., Kanaya, J., Kanzaki, D., Karlen, V., Kartvelishvili, K., Kawagoe, T., Kawamoto, P. I., Kayal, R. K., Keeler, R. G., Kellogg, B. W., Kennedy, D. H., Kim, J., Kirk, A., Klier, T., Kobayashi, M., Kobel, T. P., Kokott, M., Kolrep, S., Komamiya, R. V., Kowalewski, T., Kre, P., Krieger, J., von Krogh, T., Kuhl, P., Kyberd, W. P., Lai, G. D., Lafferty, R., Lahmann, H., Landsman, D., Lanske, J., Lauber, I., Lawson, J. G., Layter, A. M., Lee, D., Lellouch, J., Lett, L., Levinson, R., Liebisch, J., Lillich, B., List, C., Littlewood, A. W., Lloyd, S. L., Lloyd, F. K., Loebinger, G. D., Long, M. J., Losty, J., Lu, J., Ludwig, D., Liu, A., Macchiolo, A., Macpherson, W., Mader, M., Mannelli, S., Marcellini, T. E., Marchant, A. J., Martin, J. P., Martin, G., Martinez, T., Mashimo, P., Mattig, W. J., Mcdonald, J., Mckenna, E. A., Mckigney, T. J., Mcmahon, R. A., Mcpherson, F., Meijer, P., Mendez Lorenzo, S., Menke, F. S., Merritt, H., Me, I., Meyer, A., Michelini, S., Mihara, G., Mikenberg, D. J., Miller, W., Mohr, A., Montanari, T., Mori, U., Muller, K., Nagai, I., Nakamura, H. A., Neal, R., Nisiu, S. W., O'Neale, F. G., Oakham, F., Odorici, H. O., Ogren, A., Okpara, M. J., Oreglia, S., Orito, F., Palmonari, G., Pasztor, J. R., Pater, G. N., Patrick, J., Patt, R., Perez Ochoa, S., Petzold, P., Pfeifenschneider, J. E., Pilcher, J., Pinfold, D. E., Plane, P., Poffenberger, B., Poli, J., Polok, M., Przybycien, A., Quadt, B., Raith, C., Rembser, H., Rick, S., Robertson, S. A., Robin, N., Rodning, J. M., Roney, S., Rosati, K., Roscoe, A. M., Rossi, Y., Rozen, K., Runge, O., Runolfsson, D. R., Rust, K., Sach, T., Saeki, O., Sahr, W. M., Sang, E. K., G., C., Sbarra, A. D., Schaile, O., Schaile, P., Scharff Hansen, J., Schieck, B., Schmitt, S., Schmitt, A., Schoning, M., Schroder, M., Schumacher, C., Schwick, W. G., Scott, R., Seuster, T. G., Shear, B. C., Shen, C. H., Shepherd Themistocleou, P., Sherwood, G. P., Siroli, A., Skuja, A. M., Smith, G. A., Snow, R., Sobie, S., Soldner Rembold, Spagnolo, Stefania Antonia, W., Springer, M., Sproston, A., Stahl, K., Stephen, K., Stoll, D., Strom, R., Strohmer, B., Surrow, S. D., Talbot, P., Tara, S., Tarem, M., Tecchio, R., Teuscher, M., Thiergen, J., Thoma, M. A., Thomson, E., Torrence, S., Tower, T., Trefzger, I., Trigger, Z., Trocsanyi, E., Tsur, M. F., Turner Watson, I., Ueda, R., Van Kooten, P., Vannerem, M., Verzocchi, H., Vo, F., Wackerle, A., Wagner, D., Wagner, D., Waller, C. P., Ward, D. R., Ward, P. M., Watkin, A. T., Watson, N. K., Watson, P. S., Well, N., Werme, D., Wetterling, J. S., White, G. W., Wilson, J. A., Wilson, T. R., Wyatt, S., Yamashita, V., Zacek, and D., Zer Zion
Subjects: LOW-NOISE, Particle physics, E+E ANNIHILATION, Photon, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, FOS: Physical sciences, Electron, INCLUSIVE MUON PRODUCTION, 01 natural sciences, OPAL DETECTOR, Radiation length, High Energy Physics - Experiment, Nuclear physics, BHABHA SCATTERING, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, 010306 general physics, Engineering (miscellaneous), Bhabha scattering, Physics, Luminosity (scattering theory), Interaction point, ELECTROWEAK PARAMETERS, 010308 nuclear & particles physics, CMOS SIGNAL PROCESSOR, MICROVERTEX DETECTOR, SMALL-ANGLE, Calorimeter, TOTAL CROSS-SECTION, High Energy Physics::Experiment, Event (particle physics), Particle Physics - Experiment
Abstract: The measurement of small-angle Bhabha scattering is used to determine the luminosity at the OPAL interaction point for the LEP I data recorded between 1993 and 1995. The measurement is based on the OPAL Silicon-Tungsten Luminometer which is composed of two calorimeters encircling the LEP beam pipe, on opposite sides of the interaction point. The luminometer detects electrons from small-angle Bhabha scattering at angles between 25 and 58mrad. At LEP center-of-mass energies around the Z0, about half of all Bhabha electrons entering the detector fall within a 79nb fiducial acceptance region. The electromagnetic showers generated in the stack of 1 radiation length tungsten absorber plates are sampled by 608 silicon detectors with 38,912 radial pads of 2.5mm width.The fine segmentation of the detector, combined with the precise knowledge of its physical dimensions, allows the trajectories of incoming 45GeV electrons or photons to be determined with a total systematic error of less than 7microns. We have quantified all significant sources of systematic experimental error in the luminosity determination by direct physical measurement. All measured properites of the luminosity event sample are found to be in agreement with current theoretical expectations. The total systematic measurement uncertainty is 3.4x10^-4, significantly below the theoretical error of 5.4x10^-4 currently assigned to the QED calculation of the Bhabha acceptance, and contributes negligibly to the total uncertainty in the OPAL measurement of Gamma{invisible}/Gamma{l+l-}, a quantity of basic physical interest which depends crucially on the luminosity measurement., Comment: 87 pages, 36 figures, submitted to Eur.Phys. J. C. Updated references
Published: 1999
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3. A Measurement of Rb using a Double Tagging Method

Author: Abbiendi, G, Ackerstaff, K, Alexander, G, Allison, J, Altekamp, N, Anderson, KJ, Anderson, S, Arcelli, S, Asai, S, Ashby, SF, Axen, D, Cooke, OC, Herten, G, Lellouch, D, Schmitt, S, Letts, J, Rodning, N, Strohmer, R, Charlton, DG, Mannelli, M, Barberio, E, Sproston, M, Przybycien, M, Fanti, M, Nisius, R, Hansroul, M, Levinson, L, Baumann, S, Shears, TG, Roney, JM, Liebisch, R, Mes, H, Biebel, O, Seuster, R, Dubbert, J, Jeremie, H, List, B, Soldner-Rembold, S, Littlewood, C, Towers, S, De Jong, S, Mihara, S, Bethke, S, Futyan, DI, Perez-Ochoa, R, Howard, R, Lloyd, AW, Brown, RM, Stoll, K, Lloyd, SL, O'Neale, SW, Faust, AA, Klier, A, Loebinger, FK, Marcellini, S, Long, GD, Verzocchi, M, Estabrooks, PG, Ogren, HO, Rembser, C, Losty, MJ, Couyoumtzelis, C, von Torne, E, Ludwig, J, Petzold, S, Gagnon, P, Krieger, P, Shen, BC, Liu, D, Pilcher, JE, Roscoe, K, Bechtluft, J, Hill, JC, Bloodworth, IJ, Grunhaus, J, Rick, H, Lautenschlager, SR, Azuelos, G, Macchiolo, A, Burckhart, HJ, McPherson, RA, Chrisman, D, Honma, AK, Rossi, AM, Bonacorsi, D, Bell, KW, Coxe, RL, Neal, HA, Kartvelishvili, V, Clarke, PEL, Mashimo, T, Mattig, P, Kokott, TP, Desch, K, Montanari, A, Mori, T, Batley, JR, Palinkas, J, Siroli, GP, Bentvelsen, S, Kawamoto, T, McMahon, TJ, Rozen, Y, Bright-Thomas, P, Runge, K, Watkins, PM, Davis, R, Jones, CR, Schmitt, B, Gruwe, M, Voss, H, Lanske, D, Talbot, SD, Markopoulos, C, Runolfsson, O, Harder, K, Carnegie, RK, Watson, AT, Rust, DR, Skuja, A, Capiluppi, P, Komamiya, S, Nakamura, I, Sachs, K, Conboy, JE, Saeki, T, Eatough, D, Kobayashi, T, Sobie, R, Hemingway, RJ, Trocsanyi, Z, Miller, DJ, Sahr, O, Huntemeyer, P, Dado, S, Sang, WM, Tanaka, S, Lauber, J, Pater, JR, Betts, S, Sarkisyan, EKG, Fierro, M, Kuhl, T, Teuscher, R, Wackerle, F, Sbarra, C, Kayal, PI, Duckeck, G, Schaile, AD, Tsur, E, Poffenberger, P, Carter, AA, Schaile, O, Turner-Watson, MF, Watson, NK, Hargrove, CK, Menke, S, Hillier, SJ, Mader, W, Wagner, A, Gross, E, Scharf, F, Igo-Kemenes, P, Sherwood, P, Jovanovic, P, Michelini, A, Bobinski, M, Homer, RJ, Hauschild, M, Keeler, RK, Odorici, F, Karlen, D, Schwick, C, Scott, WG, Pfeifenschneider, P, Bartoldus, R, Steuerer, J, Bird, SD, Hapke, M, Thomson, MA, Hawkings, R, Oreglia, MJ, Shepherd-Themistocleous, CH, Wells, PS, Hossain, KR, Wermes, N, Gary, JW, Kluth, S, Nellen, B, Braibant, S, Fleck, I, Robertson, S, del Pozo, LA, Schoning, A, White, JS, Martin, JP, Jacob, FR, Gascon, J, Wilson, GW, Ciocca, C, Pinfold, J, Strom, D, Wilson, JA, Barlow, RJ, Wyatt, TR, von Krogh, J, Patt, J, Cohen, I, McKenna, J, Etzion, E, Yamashita, S, Mir, R, Kennedy, BW, Yekutieli, G, de Roeck, A, Robins, SA, Torrence, E, Herndon, M, Zacek, V, Lawson, I, Dixit, MS, Folman, R, Zer-Zion, D, Orito, S, Kress, T, Bock, P, Evans, HG, Vannerem, P, Jawahery, A, OPAL Collaboration, Gascon-Shotkin, SM, Martinez, G, Biguzzi, A, Merritt, FS, Schieck, J, Furtjes, A, Macpherson, A, Bohme, J, Mohr, W, Chang, CY, Snow, GA, Hobson, PR, Meyer, J, Behnke, T, Bellerive, A, Tarem, S, Oakham, FG, Burgard, C, Burgin, R, Turcot, AS, Cuffiani, M, Hildreth, MD, Martin, AJ, Duchovni, E, McDonald, WJ, Thiergen, M, Carter, JR, Gaycken, G, Mikenberg, G, Geich-Gimbel, C, Patrick, GN, Surrow, B, Horvath, D, Layter, JG, Ward, CP, Kobel, M, Brigliadori, L, Giacomelli, G, Schroder, M, Nagai, K, Giacomelli, P, Junk, TR, Van Kooten, R, Dallavalle, GM, Gibson, V, Hanson, GG, Gibson, WR, Polok, J, Trigger, I, Kawagoe, K, Kyberd, P, Gingrich, DM, Stahl, A, Pasztor, G, Glenzinski, D, Koetke, DS, Ward, DR, Duerdoth, IP, Mckigney, EA, Goldberg, J, Kolrep, M, Lazic, D, Gorn, W, Blobel, V, Plane, DE, Ball, AH, Lafferty, GD, Fiedler, F, Bella, G, Grandi, C, Schumacher, M, Heuer, RD, Sittler, A, Boutemeur, M, Lee, AM, Scharff-Hansen, P, Hocker, A, Stephens, K, Jimack, M, Clay, E, Smith, AM, Hartmann, C, Hawkes, CM, Dienes, B, Taras, P, Imrie, DC, Ishii, K, Fabbri, F, Kellogg, RG, Meijers, F, and Kowalewski, RV
Subjects: Microvertex detector, Particle physics, Physics and Astronomy (miscellaneous), Gluons, Hadron, FOS: Physical sciences, Value (computer science), Electron, 01 natural sciences, High momentum, Standard Model, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Quark fragmentation, Heavy quarks, 0103 physical sciences, 010306 general physics, Mass tag, Engineering (miscellaneous), Physics, Muon, 010308 nuclear & particles physics, Hadronic Z(0) decays, Meson production, TAU-lifetime, Multiplicity, Simulated data, High Energy Physics::Experiment
Abstract: The fraction of Z to bbbar events in hadronic Z decays has been measured by the OPAL experiment using the data collected at LEP between 1992 and 1995. The Z to bbbar decays were tagged using displaced secondary vertices, and high momentum electrons and muons. Systematic uncertainties were reduced by measuring the b-tagging efficiency using a double tagging technique. Efficiency correlations between opposite hemispheres of an event are small, and are well understood through comparisons between real and simulated data samples. A value of Rb = 0.2178 +- 0.0011 +- 0.0013 was obtained, where the first error is statistical and the second systematic. The uncertainty on Rc, the fraction of Z to ccbar events in hadronic Z decays, is not included in the errors. The dependence on Rc is Delta(Rb)/Rb = -0.056*Delta(Rc)/Rc where Delta(Rc) is the deviation of Rc from the value 0.172 predicted by the Standard Model. The result for Rb agrees with the value of 0.2155 +- 0.0003 predicted by the Standard Model., 42 pages, LaTeX, 14 eps figures included, submitted to European Physical Journal C
Published: 1998

4. Multi-photon final states in e(+)e(-) collisions at root s=130-172 GeV

Author: Ackerstaff, K, Alexander, G, Allison, J, Altekamp, N, Anderson, KJ, Anderson, S, Arcelli, S, Asai, S, Axen, D, Azuelos, G, Ball, AH, Grandi, C, Gross, E, Grunhaus, J, Gruwe, M, Hajdu, C, Hanson, GG, Hansroul, M, Hapke, M, Hargrove, CK, Hart, PA, Barberio, E, Hartmann, C, Hauschild, M, Hawkes, CM, Hawkings, R, Hemingway, RJ, Herndon, M, Herten, G, Heuer, RD, Hildreth, MD, Hill, JC, Barlow, RJ, Hillier, SJ, Hobson, PR, Homer, RJ, Honma, AK, Horvath, D, Hossain, KR, Howard, R, Huntemeyer, P, Hutchcroft, DE, Igo-Kemenes, P, Bartoldus, R, Imrie, DC, Ingram, MR, Ishii, K, Jawahery, A, Jeffreys, PW, Jeremie, H, Jimack, M, Joly, A, Jones, CR, Jones, G, Batley, JR, Jones, M, Jost, U, Jovanovic, P, Junk, TR, Karlen, D, Kartvelishvili, V, Kawagoe, K, Kawamoto, T, Kayal, PI, Keeler, RK, Baumann, S, Kellogg, RG, Kennedy, BW, Kirk, J, Klier, A, Kluth, S, Kobayashi, T, Kobel, M, Koetke, DS, Kokott, TP, Kolrep, M, Bechtluft, J, Komamiya, S, Kress, T, Krieger, P, von Krogh, J, Kyberd, P, Lafferty, GD, Lahmann, R, Lai, WP, Lanske, D, Lauber, J, Beeston, C, Lautenschlager, SR, Layter, JG, Lazic, D, Lee, AM, Lefebvre, E, Lellouch, D, Letts, J, Levinson, L, Lloyd, SL, Loebinger, FK, Behnke, T, Long, GD, Losty, MJ, Ludwig, J, Macchiolo, A, Macpherson, A, Mannelli, M, Marcellini, S, Markus, C, Martin, AJ, Martin, JP, Bell, AN, Martinez, G, Mashimo, T, Mattig, P, McDonald, WJ, McKenna, J, Mckigney, EA, McMahon, TJ, McPherson, RA, Meijers, F, Menke, S, Bell, KW, Merritt, FS, Mes, H, Meyer, J, Michelini, A, Mikenberg, G, Miller, DJ, Mincer, A, Mir, R, Mohr, W, Montanari, A, Bella, G, Mori, T, Morii, M, Muller, U, Mihara, S, Nagai, K, Nakamura, I, Neal, HA, Nellen, B, Nisius, R, O'Neale, SW, Bentvelsen, S, Oakham, FG, Odorici, F, Ogren, HO, Oh, A, Oldershaw, NJ, Oreglia, MJ, Orito, S, Palinkas, J, Pasztor, G, Pater, JR, Bethke, A, Patrick, GN, Patt, J, Pearce, MJ, Perez-Ochoa, R, Petzold, S, Pfeifenschneider, P, Pilcher, JE, Pinfold, J, Plane, DE, Poffenberger, P, Biebel, O, Poli, B, Posthaus, A, Rees, DL, Rigby, D, Robertson, S, Robins, SA, Rodning, N, Roney, JM, Rooke, A, Ros, E, Biguzzi, A, Rossi, AM, Routenburg, G, Rozen, Y, Runge, K, Runolfsson, O, Ruppel, U, Rust, DR, Rylko, R, Sachs, K, Saeki, T, Bird, SD, Sarkisyan, EKG, Sbarra, C, Schaile, AD, Schaile, O, Scharf, F, Scharff-Hansen, P, Schenk, P, Schieck, J, Schleper, P, Schmitt, B, Blobel, V, Schmitt, S, Schoning, A, Schroder, M, Schultz-Coulon, HC, Schumacher, M, Schwick, C, Scott, WG, Shears, TG, Shen, BC, Shepherd-Themistocleous, CH, Bloodworth, IJ, Sherwood, P, Siroli, GP, Sittler, A, Skillman, A, Skuja, A, Smith, AM, Snow, GA, Sobie, R, Soldner-Rembold, S, Springer, RW, Bloomer, JE, Sproston, M, Stephens, K, Steuerer, J, Stockhausen, B, Stoll, K, Strom, D, Szymanski, P, Tafirout, R, Talbot, SD, Tanaka, S, Bobinski, M, Taras, P, Tarem, S, Teuscher, R, Thiergen, M, Thomson, MA, von Torne, E, Towers, S, Trigger, I, Trocsanyi, Z, Tsur, E, Bock, P, Turcot, AS, Turner-Watson, MF, Utzat, P, Van Kooten, R, Verzocchi, M, Vikas, P, Vokurka, EH, Voss, H, Wackerle, F, Wagner, A, Bonacorsi, D, Ward, CP, Ward, DR, Watkins, PM, Watson, AT, Watson, NK, Wells, PS, Wermes, N, White, JS, Wilkens, B, Wilson, GW, Boutemeur, M, Wilson, JA, Wolf, G, Wyatt, TR, Yamashita, S, Yekutieli, G, Zacek, V, Zer-Zion, D, OPAL Collaboration, Bouwens, BT, Braibant, S, Brigliadori, L, Brown, RM, Burckhart, HJ, Burgard, C, Burgin, R, Capiluppi, P, Carnegie, RK, Carter, AA, Carter, JR, Chang, CY, Charlton, DG, Chrisman, D, Clarke, PEL, Cohen, I, Conboy, E, Cooke, OC, Cuffiani, M, Dado, S, Dallapiccola, C, Dallavalle, GM, Davis, R, De Jong, S, del Pozo, LA, Desch, K, Dienes, B, Dixit, MS, e Silva, EDC, Doucet, M, Duchovni, E, Duckeck, G, Duerdoth, IP, Eatough, D, Edwards, JEG, Estabrooks, PG, Evans, HG, Evans, M, Fabbri, F, Fanti, M, Faust, AA, Fiedler, F, Fierro, M, Fischer, HM, Fleck, I, Folman, R, Fong, DG, Foucher, M, Furtjes, A, Futyan, DI, Gagnon, P, Gary, JW, Gascon-Shotkin, SM, Geddes, NI, Geich-Gimbel, C, Geralis, T, Giacomelli, G, Giacomelli, P, Giacomelli, R, Gibson, V, Gibson, WR, Gingrich, DM, Glenzinski, D, Goldberg, J, Goodrick, MJ, and Gorn, W
Subjects: E+E ANNIHILATION, OF-MASS ENERGIES, LUND MONTE-CARLO, PAIR PRODUCTION, SEARCH, QUANTUM ELECTRODYNAMICS, GAMMA-GAMMA%22">E+E-->GAMMA-GAMMA, LEP, JET FRAGMENTATION, CROSS-SECTIONS
Published: 1998

5. Measurement of f(c -> D(+),X), f(b -> D(+),X) and Gamma(c(c)over-bar)/Gamma(had) using D*(+/-) mesons

Author: Ackerstaff, K, Alexander, G, Allison, J, Altekamp, N, Anderson, KJ, Anderson, S, Arcelli, S, Asai, S, Axen, D, Azuelos, G, Ball, AH, Runge, K, Runolfsson, O, Ruppel, U, Rust, DR, Rylko, R, Biguzzi, A, Sachs, K, Saeki, T, Sarkisyan, EKG, Hansroul, M, Loebinger, FK, Sbarra, C, Schmitt, S, Schoning, A, Schroder, M, Schultz-Coulon, HC, Schumacher, M, Schwick, C, Bird, SD, Scott, WG, Shears, TG, Long, GD, Hapke, M, Shen, BC, Shepherd-Themistocleous, CH, Sherwood, P, Siroli, GP, Sittler, A, Skillman, A, Skuja, A, Smith, AM, Blobel, V, Losty, MJ, Snow, GA, Barberio, E, Sobie, R, Soldner-Rembold, S, Springer, RW, Ludwig, J, Bloodworth, IJ, Hargrove, CK, SOldner-Rembold, S, Sproston, M, Stephens, K, Steuerer, J, Stockhausen, B, Stoll, K, Macchiolo, A, Strom, D, Szymanski, P, Tafirout, R, Hart, PA, Bloomer, JE, Talbot, SD, Tanaka, S, Taras, P, Tarem, S, Teuscher, R, Macpherson, A, Thiergen, M, Thomson, MA, von Torne, E, Towers, S, Hartmann, C, Trigger, I, Bobinski, M, Trocsanyi, Z, Tsur, E, Turcot, AS, Mannelli, M, Turner-Watson, MF, Utzat, P, Van Kooten, R, Verzocchi, M, Vikas, P, Hauschild, M, Vokurka, EH, Voss, H, Bock, P, Wackerle, F, Marcellini, S, Wagner, A, Ward, CP, Ward, DR, Watkins, PM, Watson, AT, Watson, NK, Hawkes, CM, Wells, PS, Wermes, N, White, JS, Markus, C, Bonacorsi, D, Wilkens, B, Wilson, GW, Wilson, JA, Wolf, G, Wyatt, TR, Yamashita, S, Hawkings, R, Yekutieli, G, Zacek, V, Behnke, T, Zer-Zion, D, OPAL Collaboration, Boutemeur, M, Bouwens, BT, Braibant, S, Brigliadori, L, Brown, RM, Burckhart, HJ, Hemingway, RJ, Burgard, C, Goodrick, MJ, Burgin, R, Capiluppi, P, Carnegie, RK, Carter, AA, Carter, JR, Chang, CY, Charlton, DG, Chrisman, D, Clarke, PEL, Herndon, M, Martin, AJ, Cohen, I, Conboy, JE, Cooke, OC, Cuffiani, M, Dado, S, Dallapiccola, C, Dallavalle, GM, Davis, R, De Jong, S, del Pozo, LA, Martin, JP, Herten, G, Desch, K, Dienes, B, Dixit, MS, Silva, EDE, Doucet, M, Duchovni, E, Duckeck, G, Duerdoth, IP, Eatough, D, Martinez, G, Edwards, JEG, Heuer, RD, Estabrooks, PG, Evans, HG, Evans, M, Fabbri, F, Fanti, M, Faust, AA, Fiedler, F, Fierro, M, Mashimo, T, Fischer, HM, Fleck, I, Barillari, T, Folman, R, Fong, DG, Foucher, M, Furtjes, A, Futyan, DI, Gagnon, P, Gary, JW, Mattig, P, Gascon, J, Gascon-Shotkin, SM, Geddes, NI, Hildreth, MD, Geich-Gimbel, C, Geralis, T, Giacomelli, G, Giacomelli, P, Giacomelli, R, Gibson, V, McDonald, WJ, Gibson, WR, Gingrich, DM, Glenzinski, D, Goldberg, J, Hill, JC, Hillier, SJ, Hobson, PR, Homer, RJ, Honma, AK, Horvath, D, McKenna, J, Hossain, KR, Howard, R, Huntemeyer, P, Barlow, RJ, Hutchcroft, DE, Igo-Kemenes, P, Imrie, DC, Ingram, MR, Ishii, K, Jawahery, A, Mckigney, EA, Jeffreys, PW, Jeremie, H, Jimack, M, Joly, A, Bartoldus, R, Jones, CR, Jones, G, Jones, M, Jost, U, Jovanovic, P, McMahon, TJ, Junk, TR, Karlen, D, Kartvelishvili, V, Kawagoe, K, Kawamoto, T, Batley, JR, Kayal, PI, Keeler, RK, Kellogg, RG, Kennedy, BW, McPherson, RA, Kirk, J, Klier, A, Kluth, S, Kobayashi, T, Kobel, M, Koetke, DS, Baumann, S, Kokott, TP, Kolrep, M, Komamiya, S, Gorn, W, Kress, T, Krieger, P, von Krogh, J, Kyberd, P, Lafferty, GD, Lahmann, R, Lai, WP, Bechtluft, J, Lanske, D, Lauber, J, Bell, AN, Lautenschlager, SR, Layter, JG, Lazic, D, Lee, AM, Lefebvre, E, Lellouch, D, Letts, J, Levinson, L, Beeston, C, Lloyd, SL, Meijers, F, Menke, S, Merritt, FS, Mes, H, Meyer, J, Michelini, A, Milkenberg, G, Miller, DJ, Mincer, A, Grandi, C, Mir, R, Bell, KW, Mohr, W, Montanari, A, Mori, T, Morii, M, Muller, U, Mihara, S, Nagai, K, Nakamura, I, Gross, E, Neal, HA, Nellen, B, Bella, G, Nisius, R, O'Neale, SW, Oakham, FG, Odorici, F, Ogren, HO, Oh, A, Oldershaw, NJ, Grunhaus, J, Oreglia, MJ, Orito, S, Palinkas, J, Bentvelsen, S, Pasztor, G, Pater, JR, Patrick, GN, Patt, J, Pearce, MJ, Perez-Ochoa, R, Gruwe, M, Petzold, S, Pfeifenschneider, P, Pichler, JE, Pinfold, J, Bethke, S, Plane, DE, Poffenberger, P, Poli, B, Posthaus, A, Rees, DL, Hajdu, C, Rigby, D, Robertson, S, Robins, SA, Rodning, N, Roney, JM, Biebel, O, Rooke, A, Ros, E, Rossi, AM, Routenburg, P, Hanson, GG, and Rozen, Y
Subjects: Heavy Quarks, Opal Jet Chamber, Charm Quark Pairs, Microvertex Detector, Hadronic Z(0) Decays, Fragmentation Function, Z0, QCD
Published: 1998

6. Search for anomalous production of di-lepton events with missing transverse momentum in e(+)e(-) collisions at root s = 161 and 172 GeV

Author: Ackerstaff, K, Alexander, G, Allison, J, Altekamp, N, Anderson, KJ, Anderson, S, Arcelli, S, Asai, S, Axen, D, Azuelos, G, Ball, AH, Barberio, E, Barlow, RJ, Bartoldus, R, Batley, JR, Baumann, S, Bechtluft, J, Beeston, C, Behnke, T, Bell, AN, Bell, KW, Bella, G, Bentvelsen, S, Bethke, S, Biebel, O, Biguzzi, A, Bird, SD, Blobel, V, Bloodworth, IJ, Bloomer, JE, Bobinski, M, Bock, P, Bonacorsi, D, Boutemeur, M, Bouwens, BT, Braibant, S, Brigliadori, L, Brown, RM, Burckhart, HJ, Burgard, C, Burgin, R, Capiluppi, P, Carnegie, RK, Carter, AA, Carter, JR, Chang, CY, Charlton, DG, Chrisman, D, Clarke, PEL, Cohen, I, Conboy, JE, Cooke, OC, Cuffiani, M, Dado, S, Dallapiccola, C, Dallavalle, GM, Davis, R, De Jong, S, del Pozo, LA, Desch, K, Dienes, B, Dixit, MS, Silva, EDE, Doucet, M, Duchovni, E, Duckeck, G, Duerdoth, IP, Eatough, D, Edwards, JEG, Estabrooks, PG, Evans, HG, Evans, M, Fabbri, F, Fanti, M, Faust, AA, Fiedler, F, Fierro, M, Fischer, HM, Fleck, I, Folman, R, Fong, DG, Foucher, M, Furtjes, A, Futyan, DI, Gagnon, P, Gary, JW, Gascon, J, Gascon-Shotkin, SM, Geddes, NI, Geich-Gimbel, C, Geralis, T, Giacomelli, G, Giacomelli, P, Giacomelli, R, Gibson, V, Gibson, WR, Gingrich, DM, Glenzinski, D, Goldberg, J, Goodrick, MJ, Gorn, W, Grandi, C, Gross, E, Grunhaus, J, Gruwe, M, Hajdu, C, Hanson, GG, Hansroul, M, Hapke, M, Hargrove, CK, Hart, PA, Hartmann, C, Hauschild, M, Hawkes, CM, Hawkings, R, Hemingway, RJ, Herndon, M, Herten, G, Heuer, RD, Hildreth, MD, Hill, JC, Hillier, SJ, Hobson, PR, Homer, RJ, Honma, AK, Horvath, D, Hossain, KR, Howard, R, Huntemeyer, P, Hutchcroft, DE, Igo-Kemenes, P, Imrie, DC, Ingram, MR, Ishii, K, Jawahery, A, Jeffreys, PW, Jeremie, H, Jimack, M, Joly, A, Jones, CR, Jones, G, Jones, M, Jost, U, Jovanovic, P, Junk, TR, Karlen, D, Kartvelishvili, V, Kawagoe, K, Kawamoto, T, Kayal, PI, Keeler, RK, Kellogg, RG, Kennedy, BW, Kirk, J, Klier, A, Kluth, S, Kobayashi, T, Kobel, M, Koetke, DS, Kokott, TP, Kolrep, M, Komamiya, S, Kress, T, Krieger, P, von Krogh, J, Kyberd, P, Lafferty, GD, Lahmann, R, Lai, WP, Lanske, D, Lauber, J, Lautenschlager, SR, Layter, JG, Lazic, D, Lee, AM, Lefebvre, E, Lellouch, D, Letts, J, Levinson, L, Lloyd, SL, Loebinger, FK, Long, GD, Losty, MJ, Ludwig, J, Macchiolo, A, Macpherson, A, Mannelli, M, Marcellini, S, Markus, C, Martin, AJ, Martin, JP, Martinez, G, Mashimo, T, Mattig, P, McDonald, WJ, McKenna, J, Mckigney, EA, McMahon, TJ, McPherson, RA, Meijers, F, Menke, S, Merritt, FS, Mes, H, Meyer, J, Michelini, A, Mikenberg, G, Miller, DJ, Mincer, A, Mir, R, Mohr, W, Montanari, A, Mori, T, Morii, M, Muller, U, Mihara, S, Nagai, K, Nakamura, I, Neal, HA, Nellen, B, Nisius, R, O'Neale, SW, Oakham, FG, Odorici, F, Ogren, HO, Oh, A, Oldershaw, NJ, Oreglia, MJ, Orito, S, Palinkas, J, Pasztor, G, Pater, JR, Patrick, GN, Patt, J, Pearce, MJ, Perez-Ochoa, R, Petzold, S, Pfeifenschneider, P, Pilcher, JE, Pinfold, J, Plane, DE, Poffenberger, P, Poli, B, Posthaus, A, Rees, DL, Rigby, D, Robertson, S, Robins, SA, Rodning, N, Roney, JM, Rooke, A, Ros, E, Rossi, AM, Routenburg, P, Rozen, Y, Runge, K, Runolfsson, O, Ruppel, U, Rust, DR, Rylko, R, Sachs, K, Saeki, T, Sarkisyan, EKG, Sbarra, C, Schaile, AD, Schaile, O, Scharf, F, Scharff-Hansen, P, Schenk, P, Schieck, J, Schleper, P, Schmitt, B, Schmitt, S, Schoning, A, Schroder, M, Schultz-Coulon, HC, Schumacher, M, Schwick, C, Scott, WG, Shears, TG, Shen, BC, Shepherd-Themistocleous, CH, Sherwood, P, Siroli, GP, Sittler, A, Skillman, A, Skuja, A, Smith, AM, Snow, GA, Sobie, R, Soldner-Rembold, S, Springer, RW, Sproston, M, Stephens, K, Steuerer, J, Stockhausen, B, Stoll, K, Strom, D, Szymanski, P, Tafirout, R, Talbot, SD, Tanaka, S, Taras, P, Tarem, S, Teuscher, R, Thiergen, M, Thomson, MA, von Torne, E, Towers, S, Trigger, L, Trocsanyi, Z, Tsur, E, Turcot, AS, Turner-Watson, MF, Utzat, P, Van Kooten, R, Verzocchi, M, Vikas, P, Vokurka, EH, Voss, H, Wackerle, F, Wagner, A, Ward, CP, Ward, DR, Watkins, PM, Watson, AT, Watson, NK, Wells, PS, Wermes, N, White, JS, Wilkens, B, Wilson, GW, Wilson, JA, Wolf, G, Wyatt, TR, Yamashita, S, Yekutieli, G, Zacek, V, Zer-Zion, D, and OPAL Collaboration
Subjects: OPAL, MONTE-CARLO PROGRAM, MICROVERTEX DETECTOR, HIGH-ENERGIES
Published: 1998

7. Search for a massive Di-photon resonance at root s=91-172 GeV

Author: Ackerstaff, K, Alexander, G, Allison, J, Altekamp, N, Anderson, KJ, Anderson, S, Arcelli, S, Asai, S, Axen, D, Azuelos, G, Ball, AH, Barberio, E, Barlow, RJ, Bartoldus, R, Batley, JR, Baumann, S, Bechtluft, J, Beeston, C, Behnke, T, Bell, AN, Bell, KW, Bella, G, Bentvelsen, S, Bethke, S, Biebel, O, Biguzzi, A, Bird, SD, Blobel, V, Bloodworth, IJ, Bloomer, JE, Bobinski, M, Bock, P, Bonacorsi, D, Boutemeur, M, Bouwens, BT, Braibant, S, Brigliadori, L, Brown, RM, Burckhart, HJ, Burgard, C, Burgin, R, Capiluppi, P, Carnegie, RK, Carter, AA, Carter, JR, Chang, CY, Charlton, DG, Chrisman, D, Clarke, PEL, Cohen, I, Conboy, JE, Cooke, OC, Cuffiani, M, Dado, S, Dallapiccola, C, Dallavalle, GM, Davis, R, De Jong, S, del Pozo, LA, Desch, K, Dienes, B, Dixit, MS, Silva, ED, Doucet, M, Duchovni, E, Duckeck, G, Duerdoth, IP, Eatough, D, Edwards, JEG, Estabrooks, PG, Evans, HG, Evans, M, Fabbri, F, Fanti, M, Faust, AA, Fiedler, F, Fierro, M, Fischer, HM, Fleck, I, Folman, R, Fong, DG, Foucher, M, Furtjes, A, Futyan, DI, Gagnon, P, Gary, JW, Gascon, J, Gascon-Shotkin, SM, Geddes, NI, Geich-Gimbel, C, Geralis, T, Giacomelli, G, Giacomelli, P, Giacomelli, R, Gibson, V, Gibson, WR, Gingrich, DM, Glenzinski, D, Goldberg, J, Goodrick, MJ, Gorn, W, Grandi, C, Gross, E, Grunhaus, J, Gruwe, M, Hajdu, C, Hanson, GG, Hansroul, M, Hapke, M, Hargrove, CK, Hart, PA, Hartmann, C, Hauschild, M, Hawkes, CM, Hawkings, R, Hemingway, RJ, Herndon, M, Herten, G, Heuer, RD, Hildreth, MD, Hill, JC, Hillier, SJ, Hobson, PR, Homer, RJ, Honma, AK, Horvath, D, Hossain, KR, Howard, R, Huntemeyer, P, Hutchcroft, DE, Igo-Kemenes, P, Imrie, DC, Ingram, MR, Ishii, K, Jawahery, A, Jeffreys, PW, Jeremie, H, Jimack, M, Joly, A, Jones, CR, Jones, G, Jones, M, Jost, U, Jovanovic, P, Junk, TR, Karlen, D, Kartvelishvili, V, Kawagoe, K, Kawamoto, T, Kayal, PI, Keeler, RK, Kellogg, RG, Kennedy, BW, Kirk, J, Klier, A, Kluth, S, Kobayashi, T, Kobel, M, Koetke, DS, Kokott, TP, Kolrep, M, Komamiya, S, Kress, T, Krieger, P, von Krogh, J, Kyberd, P, Lafferty, GD, Lahmann, R, Lai, WP, Lanske, D, Lauber, J, Lautenschlager, SR, Layter, JG, Lazic, D, Lee, AM, Lefebvre, E, Lellouch, D, Letts, J, Levinson, L, Lloyd, SL, Loebinger, FK, Long, GD, Losty, MJ, Ludwig, J, Macchiolo, A, Macpherson, A, Mannelli, M, Marcellini, S, Markus, C, Martin, AJ, Martin, JP, Martinez, G, Mashimo, T, Mattig, P, McDonald, WJ, McKenna, J, Mckigney, EA, McMahon, TJ, McPherson, RA, Meijers, F, Menke, S, Merritt, FS, Mes, H, Meyer, J, Michelini, A, Mikenberg, G, Miller, DJ, Mincer, A, Mir, R, Mohr, W, Montanari, A, Mori, T, Morii, M, Muller, U, Mihara, S, Nagai, K, Nakamura, I, Neal, HA, Nellen, B, Nisius, R, O'Neale, SW, Oakham, FG, Odorici, F, Ogren, HO, Oh, A, Oldershaw, NJ, Oreglia, MJ, Orito, S, Palinkas, J, Pasztor, G, Pater, JR, Patrick, GN, Patt, J, Pearce, MJ, Perez-Ochoa, R, Petzold, S, Pfeifenschneider, P, Pilcher, JE, Pinfold, J, Plane, DE, Poffenberger, P, Poli, B, Posthaus, A, Rees, DL, Rigby, D, Robertson, S, Robins, SA, Rodning, N, Roney, JM, Rooke, A, Ros, E, Rossi, AM, Routenburg, P, Rozen, Y, Runge, K, Runolfsson, O, Ruppel, U, Rust, DR, Rylko, R, Sachs, K, Saeki, T, Sarkisyan, EKG, Sbarra, C, Schaile, AD, Schaile, O, Scharf, F, Scharff-Hansen, P, Schenk, P, Schieck, J, Schleper, P, Schmitt, B, Schmitt, S, Schoning, A, Schroder, M, Schultz-Coulon, HC, Schumacher, M, Schwick, C, Scott, WG, Shears, TG, Shen, BC, Shepherd-Themistocleous, CH, Sherwood, P, Siroli, GP, Sittler, A, Skillman, A, Skuja, A, Smith, AM, Snow, GA, Sobie, R, Soldner-Rembold, S, Springer, RW, Sproston, M, Stephens, K, Steuerer, J, Stockhausen, B, Stoll, K, Strom, D, Szymanski, P, Tafirout, R, Talbot, SD, Tanaka, S, Taras, P, Tarem, S, Teuscher, R, Thiergen, M, Thomson, MA, von Torne, E, Towers, S, Trigger, I, Trocsanyi, Z, Tsur, E, Turcot, AS, Turner-Watson, MF, Utzat, P, Van Kooten, R, Verzocchi, M, Vikas, P, Vokurka, EH, Voss, H, Wackerle, F, Wagner, A, Ward, CP, Ward, DR, Watkins, PM, Watson, AT, Watson, NK, Wells, PS, Wermes, N, White, JS, Wilkens, B, Wilson, GW, Wilson, JA, Wolf, G, Wyatt, TR, Yamashita, S, Yekutieli, G, Zacek, V, Zer-Zion, D, and OPAL Collaboration
Subjects: PHYSICS, OPAL JET CHAMBER, E+E ANNIHILATION, ENERGIES, LUND MONTE-CARLO, HIGGS BOSONS, ELECTROWEAK COUPLINGS, LEP, MICROVERTEX DETECTOR, CROSS-SECTIONS
Published: 1998

8. A study of B meson oscillations using hadronic $Z^0$ decays containing leptons

Author: Ackerstaff, K., Alexander, G., Allison, J., Altekamp, N., Anderson, Kj, Anderson, S., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Ball, Ah, Barberio, E., Barlow, Rj, Bartoldus, R., Batley, Jr, Baumann, S., Bechtluft, J., Beeston, C., Behnke, T., Bell, An, Bell, Kw, Bella, G., Bentvelsen, S., Berlich, P., Bethke, S., Biebel, O., Biguzzi, A., Bird, Sd, Blobel, V., Bloodworth, Ij, Bloomer, Je, Bobinski, M., Bock, P., Bonacorsi, D., Boutemeur, M., Bouwens, Bt, Braibant, S., Brigliadori, L., Brown, Rm, Burckhart, Hj, Burgard, C., Burgin, R., Capiluppi, P., Carnegie, Rk, Carter, Aa, Carter, Jr, Chang, Cy, Charlton, Dg, Chrisman, D., Clarke, Pel, Cohen, I., Conboy, Je, Cooke, Oc, Cuffiani, M., Dado, S., Dallapiccola, C., Dallavalle, Gm, Dejong, S., Delpozo, La, Desch, K., Dixit, Ms, Silva, Edce, Mathieu Doucet, Duchovni, E., Duckeck, G., Duerdoth, Ip, Eatough, D., Edwards, Jeg, Estabrooks, Pg, Evans, Hg, Evans, M., Fabbri, F., Fanti, M., Faust, Aa, Fiedler, F., Fierro, M., Fischer, Hm, Fleck, I., Folman, R., Fong, Dg, Foucher, M., Furtjes, A., Futyan, Di, Gagnon, P., Gary, Jw, Gascon, J., Gasconshotkin, Sm, Geddes, Ni, Geichgimbel, C., Geralis, T., Giacomelli, G., Giacomelli, P., Giacomelli, R., Gibson, V., Gibson, Wr, Gingrich, Dm, Glenzinski, D., Goldberg, J., Goodrick, Mj, Gorn, W., Grandi, C., Gross, E., Grunhaus, J., Gruwe, M., Hajdu, C., Hanson, Gg, Hansroul, M., Hapke, M., Hargrove, Ck, Hart, Pa, Hartmann, C., Hauschild, M., Hawkes, Cm, Hawkings, R., Hemingway, Rj, Herndon, M., Herten, G., Heuer, Rd, Hildreth, Md, Hill, Jc, Hillier, Sj, Hilse, T., Hobson, Pr, Homer, Rj, Honma, Ak, Horvath, D., Howard, R., HUTCHCROFT, DE, Igokemenes, P., Imrie, Dc, INGRAM, MR, Ishii, K., Jawahery, A., Jeffreys, Pw, Jeremie, H., Jimack, M., Joly, A., Jones, Cr, Jones, G., Jones, M., Jost, U., Jovanovic, P., Junk, Tr, Karlen, D., Kartvelishvili, V., Kawagoe, K., Kawamoto, T., Keeler, Rk, Kellogg, Rg, Kennedy, Bw, Kirk, J., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Koetke, Ds, Kokott, Tp, Kolrep, M., Komamiya, S., Kress, T., Krieger, P., Vonkrogh, J., Kyberd, P., Lafferty, Gd, Lahmann, R., Lai, Wp, Lanske, D., Lauber, J., Lautenschlager, Sr, Layter, Jg, Lazic, D., Lee, Am, Lefebvre, E., Lellouch, D., Letts, J., Levinson, L., Lloyd, Sl, Loebinger, Fk, Long, Gd, Losty, Mj, Ludwig, J., Macchiolo, A., Macpherson, A., Mannelli, M., Marcellini, S., Markus, C., Martin, Aj, Martin, Jp, Martinez, G., Mashimo, T., Mattig, P., Mcdonald, Wj, Mckenna, J., Mckigney, Ea, Mcmahon, Tj, Mcpherson, Ra, Meijers, F., Menke, S., Merritt, Fs, Mes, H., Meyer, J., Michelini, A., Mikenberg, G., Miller, Dj, Mincer, A., Mir, R., Mohr, W., Montanari, A., Mori, T., Morii, M., Muller, U., Nagai, K., Nakamura, I., Neal, Ha, Nellen, B., Nisius, R., Oneale, Sw, Oakham, Fg, Odorici, F., Ogren, Ho, Oldershaw, Nj, Oreglia, Mj, Orito, S., Palinkas, J., Pasztor, G., Pater, Jr, Patrick, Gn, Patt, J., Pearce, Mj, Petzold, S., Pfeifenschneider, P., Pilcher, Je, Pinfold, J., PLANE, DE, Poffenberger, P., Poli, B., Posthaus, A., Przysiezniak, H., Rees, Dl, Rigby, D., Robertson, S., Robins, Sa, Rodning, N., Roney, Jm, Rooke, A., Ros, E., Rossi, Am, Rosvick, M., Routenburg, P., Rozen, Y., Runge, K., Runolfsson, O., Ruppel, U., Rust, Dr, Rylko, R., Sachs, K., Saeki, T., Sarkisyan, Ekg, Sbarra, C., Schaile, Ad, Schaile, O., Scharf, F., Scharffhansen, P., Schenk, P., Schieck, J., Schleper, P., Schmitt, B., Schmitt, S., Schoning, A., Schroder, M., Schultzcoulon, Hc, Schulz, M., Schumacher, M., Schwick, C., Scott, Wg, Shears, Tg, Shen, Bc, Shepherdthemistocleous, Ch, Sherwood, P., Siroli, Gp, Sittler, A., Skillman, A., Skuja, A., Smith, Am, Snow, Ga, Sobie, R., Soldnerrembold, S., Springer, Rw, Sproston, M., Stephens, K., Steuerer, J., Stockhausen, B., Stoll, K., Strom, D., Szymanski, P., Tafirout, R., Talbot, Sd, Tanaka, S., Taras, P., Tarem, S., Teuscher, R., Thiergen, M., Thomson, Ma, Vontorne, E., Towers, S., Trigger, I., Tsur, E., Turcot, As, Turnerwatson, Mf, Utzat, P., Vankooten, R., Verzocchi, M., Vikas, P., Vokurka, Eh, Voss, H., Wackerle, F., Wagner, A., Ward, Cp, Ward, Dr, Watkins, Pm, Watson, At, Watson, Nk, Wells, Ps, Wermes, N., White, Js, Wilkens, B., Wilson, Gw, Wilson, Ja, Wolf, G., Wyatt, Tr, Yamashita, S., Yekutieli, G., Zacek, V., and Zerzion, D.
Subjects: Particle physics, Physics and Astronomy (miscellaneous), CPT symmetry, B%28B%29OVER-BAR%29%2FGAMMA%28Z%280%29->HADRONS%29%22">GAMMA(Z(0)->B(B)OVER-BAR)/GAMMA(Z(0)->HADRONS), Flavour, Hadron, FOS: Physical sciences, TIME-DEPENDENCE, Jet (particle physics), FREQUENCY, 01 natural sciences, STRINGS, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, B meson, 010306 general physics, Physics, 010308 nuclear & particles physics, Charge (physics), LEP, MICROVERTEX DETECTOR, QUARK FRAGMENTATION, SUPERWEAK, CP violation, JET CHARGE, CP VIOLATION, Particle Physics - Experiment, Lepton
Abstract: An event sample enriched in semileptonic decays of b hadrons is selected using an inclusive lepton selection from approximately 3.0 million hadronic Z^0 decays collected with the OPAL detector. This sample is used to investigate B meson oscillations by reconstructing a proper decay time for the parent of each lepton, using a jet charge method to estimate the production flavour of this parent, and using the lepton charge to tag the decay flavour. We measure the mass difference between the two B^0_d mass eigenstates Delta(m_d) = 0.444 +/- 0.029 + 0.020 - 0.017 ps^-1. For the B^0_s system, we find Delta(m_s) > 3.1 ps^-1 at the 95% confidence level. This limit varies only a little if alternative limit setting approaches are adopted. Regions at higher Delta(m_s) are also excluded with some methods for setting the limit. By studying the charge symmetry of the B^0_d mixing structure, we are able to constrain possible CP and CPT violating effects. We measure the CP violation parameter Re(epsilon_B) = -0.006 +/- 0.010 +/- 0.006 and the indirect CPT violating parameter Im(delta_B) = -0.020 +/- 0.016 +/- 0.006. If we invoke CPT symmetry, then we obtain Re(epsilon_B) = 0.002 +/- 0.007 +/- 0.003., 35 pages, LaTeX, 13 eps figures included, submitted to Zeit. f. Physik
Published: 1997

9. Search for the Standard Model Higgs Boson in e^+e^- Collisions at sqrt{s} = 161-172 GeV

Author: Ackerstaff, K, Alexander, G, Allison, J, Altekamp, N, Anderson, KJ, Anderson, S, Arcelli, S, Asai, S, Axen, D, Azuelos, G, Ball, AH, Loebinger, FK, Long, GD, Losty, MJ, Ludwig, J, Macchiolo, A, Macpherson, A, Mannelli, M, Marcellini, S, Markus, C, Bell, AN, Gorn, W, Martin, AJ, Martine, JP, Martinez, G, Mashimo, T, Mattig, P, McDonald, WJ, McKenna, J, Mckigney, EA, Mcmahon, TJ, McPherson, RA, Grandi, C, Bell, KW, Meijers, F, Menke, S, Merritt, FS, Mes, H, Meyer, J, Michelini, A, Mikenberg, G, Miller, DJ, Mincer, A, Gross, E, Mir, R, Bella, G, Mohr, W, Montanari, A, Mori, T, Morii, M, Muller, U, Mihara, S, Nagai, K, Nakamura, I, Grunhaus, J, Neal, HA, Nellen, B, Bentvelsen, S, Nisius, R, O'Neale, SW, Oakham, FG, Odorici, F, Ogren, HO, Oh, A, Oldershaw, NJ, Oreglia, MJ, Orito, S, Palinkas, J, Bethke, S, Pasztor, G, Pater, JR, Patrick, GN, Patt, J, Pearce, MJ, Perez-Ochoa, R, Gruwe, M, Petzold, S, Pfeifenschneider, P, Pilcher, JE, Pinfold, J, Biebel, O, Plane, DE, Poffenberger, P, Poli, B, Posthaus, A, Rees, DL, Hajdu, C, Rigby, D, Robertson, S, Robins, SA, Rodning, N, Roney, JM, Biguzzi, A, Rooke, A, Ros, E, Rossi, AM, Routenburg, P, Hanson, GG, Rozen, Y, Runge, K, Runolfsson, O, Ruppel, U, Rust, DR, Rylko, R, Bird, SD, Sachs, K, Saeki, T, Sarkisyan, EKG, Hansroul, M, Sbarra, C, Schaile, AD, Schaile, O, Scharf, F, Scharff-Hansen, P, Schenk, P, Schieck, J, Blobel, V, Schleper, P, Schmitt, B, Hapke, M, Schmitt, S, Schoning, A, Schroder, M, Schultz-Coulon, HC, Schumacher, M, Schwick, C, Scott, WG, Shears, TG, Bloodworth, IJ, Shen, BC, Barberio, E, Shepherd-Themistocleous, CH, Sherwood, P, Siroli, GP, Sittler, A, Skillman, A, Skuja, A, Smith, AM, Snow, GA, Sobie, R, Bloomer, JE, Hargrove, CK, Soldner-Rembold, S, Springer, RW, Sproston, M, Stephens, K, Steuerer, J, Stockhausen, B, Stoll, K, Strom, D, Szymanski, P, Tafirout, R, Hart, PA, Bobinski, M, Talbot, SD, Tanaka, S, Taras, P, Tarem, S, Teuscher, R, Thiergen, M, Thomson, MA, von Torne, E, Towers, S, Hartmann, C, Trigger, I, Bock, P, Trocsanyi, Z, Tsur, E, Turcot, AS, Turner-Watson, MF, Utzat, P, Van Kooten, R, Verzocchi, M, Vikas, P, Hauschild, M, Vokurka, EH, Voss, H, Bonacorsi, D, Wackerle, F, Wagner, A, Ward, CP, Ward, DR, Watkins, PM, Watson, AT, Watson, NK, Hawkes, CM, Wells, PS, Wermes, N, White, JS, Boutemeur, M, Wilkens, B, Wilson, GW, Wilson, JA, Wolf, G, Wyatt, TR, Yamashita, S, Hawkings, R, Yekutieli, G, Zacek, V, Zer-Zion, D, OPAL Collaboration, Bouwens, BT, Braibant, S, Brigliadori, L, Brown, RM, Burckhart, HJ, Burgard, C, Hemingway, RJ, Burgin, R, Capiluppi, P, Carnegie, RK, Carter, AA, Carter, JR, Chang, CY, Charlton, DG, Chrisman, D, Clarke, PEL, Cohen, I, Herndon, M, Conboy, JE, Cooke, OC, Cuffiani, M, Dado, S, Dallapiccola, C, Dallavalle, GM, Davis, R, De Jong, S, del Pozo, LA, Desch, K, Herten, G, Dienes, B, Dixit, MS, Silva, EDE, Doucet, M, Duchovni, E, Duckeck, G, Duerdoth, IP, Eatough, D, Edwards, JEG, Estabrooks, PG, Heuer, RD, Evans, HG, Evans, M, Fabbri, F, Fanti, M, Faust, AA, Fiedler, F, Fierro, M, Fischer, HM, Fleck, I, Folman, R, Barlow, RJ, Fong, DG, Foucher, M, Furtjes, A, Futyan, DI, Gagnon, P, Gary, JW, Gascon, J, Gascon-Shotkin, SM, Geddes, NI, Geich-Gimbel, C, Hildreth, MD, Geralis, T, Giacomelli, G, Giacomelli, P, Giacomelli, R, Gibson, V, Gibson, WR, Gingrich, DM, Glenzinski, D, Goldberg, J, Goodrick, MJ, Hill, JC, Hillier, SJ, Hobson, PR, Homer, RJ, Honma, AK, Horvath, D, Hossain, KR, Howard, R, Huntemeyer, P, Bartoldus, R, Hutchcroft, DE, Igo-Kemenes, P, Imrie, DC, Ingram, MR, Ishii, K, Jawahery, A, Jeffreys, PW, Jeremie, H, Jimack, M, Joly, A, Batley, JR, Jones, CR, Jones, G, Jone, M, Jost, U, Jovanovic, P, Junk, TR, Karlen, D, Kartvelishvili, V, Kawagoe, K, Kawamoto, T, Baumann, S, Kayal, PI, Keeler, RK, Kellogg, RG, Kennedy, BW, Kirk, J, Klier, A, Kluth, S, Kobayashi, T, Kobel, M, Koetke, DS, Bechtluft, J, Kokott, TP, Kolrep, M, Komamiya, S, Kress, T, Krieger, P, von Krogh, J, Kyberd, P, Lafferty, GD, Lahmann, R, Lai, WP, Beeston, C, Lanske, D, Lauber, J, Lautenschlager, SR, Layter, JG, Lazic, D, Lee, AM, Lefebvre, E, Lellouch, D, Letts, J, Levinson, L, Behnke, T, and Lloyd, SL
Subjects: Physics, Particle physics, Program, Muon, Missing energy, Physics and Astronomy (miscellaneous), High Energy Physics::Phenomenology, FOS: Physical sciences, Detector, LEP, Electron, Fermion, High-Energies, Resonance (particle physics), Standard Model, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), E+E Annihilation, Higgs boson, High Energy Physics::Experiment, Limit, Cross-Sections, Engineering (miscellaneous), Particle Physics - Experiment, Lepton
Abstract: This paper describes a search for the Standard Model Higgs boson using data from e^+e^- collisions collected at center-of-mass energies of 161, 170 and 172 GeV by the OPAL detector at LEP. The data collected at these energies correspond to integrated luminosities of 10.0, 1.0 and 9.4 pb^-1, respectively. The search is sensitive to the main final states from the process in which the Higgs boson is produced in association with a fermion anti-fermion pair, namely four jets, two jets with missing energy, and two jets produced together with a pair of electron, muon or tau leptons. One candidate event is observed, in agreement with the Standard Model background expectation. In combination with previous OPAL searches at center-of-mass energies close to the Z^0 resonance and the revised previous OPAL searches at 161 GeV, we derive a lower limit of 69.4 GeV for the mass of the Standard Model Higgs boson at the 95% confidence level., Comment: 33 pages, LaTeX, 12 eps figures included, submitted to Zeit. Phys. C
Published: 1997
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10. A measurement of the B-s(0) lifetime using reconstructed D-s(-) mesons

Author: Ackerstaff, K, Alexander, G, Allison, J, Altekamp, N, Anderson, KJ, Anderson, S, Arcelli, S, Asai, S, Axen, D, Azuelos, G, Ball, AH, Robertson, S, Rust, DR, Cohen, I, Herndon, M, Oldershaw, NJ, Junk, TR, Martin, AJ, Hajdu, C, Voss, H, Lefebvre, E, Lauber, J, Biguzzi, A, Conboy, JE, Cooke, OC, Biebel, O, Cuffiani, M, Layter, JG, Tanaka, S, Schaile, O, Kolrep, M, Grunhaus, J, Ludwig, J, Wyatt, TR, Gingrich, DM, Herten, G, Estabrooks, PG, Foucher, M, Goldberg, J, Hill, JC, Hillier, SJ, Hobson, PR, Evans, HG, Soldner-Rembold, S, Homer, RJ, White, JS, Futyan, DI, Stockhausen, B, Honma, AK, Beeston, C, Gorn, W, Taras, P, Horvath, D, McPherson, RA, Bloodworth, IJ, Letts, J, Bentvelsen, S, Gruwe, M, Turcot, AS, Hossain, KR, Kyberd, P, Stoll, K, McKenna, J, Pinfold, J, Robins, SA, Kawamoto, T, Watson, AT, Howard, R, Loebinger, FK, Nisius, R, Roney, JM, Tarem, S, Huntemeyer, P, Ros, E, Sarkisyan, EKG, Kobel, M, Desch, K, Barlow, RJ, Hutchcroft, DE, Igo-Kemenes, P, Oreglia, MJ, O'Neale, SW, Scharf, F, Thiergen, M, Turner-Watson, MF, Imrie, DC, Schieck, J, Hargrove, CK, Hapke, M, Lanske, D, Eatough, D, Ingram, MR, Ishii, K, Giacomelli, P, Jawahery, A, Petzold, S, Dado, S, Orito, S, Bechtluft, J, Krieger, P, Van Kooten, R, Watson, NK, Jeffreys, PW, Mckigney, EA, Strom, D, Oakham, FG, Sbarra, C, Mannelli, M, Fleck, I, Rooke, A, Hawkes, CM, Jeremie, H, Jimack, M, Hauschild, M, Joly, A, Rodning, N, Dienes, B, Wilson, GW, Pfeifenschneider, P, Macchiolo, A, Giacomelli, R, Levinson, L, McMahon, TJ, Kirk, J, von Krogh, J, Lloyd, SL, Meijers, F, Menke, S, Merritt, FS, Klier, A, Mes, H, Geddes, NI, Lafferty, GD, Dallapiccola, C, Meyer, J, Hanson, GG, Long, GD, Dixit, MS, Michelini, A, Schmitt, S, Rossi, AM, Hart, PA, Macpherson, A, Evans, M, Mikenberg, G, Poffenberger, P, Dallavalle, GM, Schleper, P, Trigger, I, Verzocchi, M, Gagnon, P, Miller, DJ, Runge, K, Springer, RW, Vokurka, EH, Silva, EDE, Mincer, A, Wackerle, F, Wilkens, B, Pearce, MJ, Grandi, C, Mir, R, Bell, KW, Szymanski, P, Sproston, M, Wilson, JA, Duchovni, E, Fabbri, F, Mohr, W, Yamashita, S, Behnke, T, Rigby, D, Kellogg, RG, Montanari, A, Mori, T, Lee, AM, Morii, M, Thomson, MA, Bartoldus, R, Tafirout, R, Bethke, S, Faust, AA, Gary, JW, Muller, U, Bird, SD, Davis, R, Stephens, K, Bonacorsi, D, Sachs, K, Komamiya, S, Mattig, P, Mihara, S, Nagai, K, Mashimo, T, Nakamura, I, Vikas, P, Karlen, D, Geralis, T, von Torne, E, Rylko, R, Routenburg, P, Schmitt, B, Pasztor, G, Plane, DE, Rozen, Y, Schoning, A, Schroder, M, Schultz-Coulon, HC, Pater, JR, Schumacher, M, Poli, B, Jones, CR, Schwick, C, Marcellini, S, Runolfsson, O, Kartvelishvili, V, Scott, WG, Zer-Zion, D, Bock, P, Martin, JP, Kluth, S, Shears, TG, Bobinski, M, Jones, G, Yekutieli, G, Edwards, JEG, Fiedler, F, Lahmann, R, Shen, BC, Ward, DR, Fischer, HM, Kawagoe, K, Blobel, V, Folman, R, Geich-Gimbel, C, Teuscher, R, Losty, MJ, Shepherd-Themistocleous, CH, Barberio, E, De Jong, S, Giacomelli, G, Batley, JR, Kobayashi, T, Sherwood, P, Gibson, V, Hansroul, M, Utzat, P, Palinkas, J, Siroli, GP, Sittler, A, Skillman, A, Duckeck, G, Gross, E, del Pozo, LA, Hartmann, C, Koetke, DS, Lai, WP, Skuja, A, Hawkings, R, Jones, M, Hildreth, MD, Wermes, N, Pilcher, JE, Schenk, P, Smith, AM, Snow, GA, Scharff-Hansen, P, Sobie, R, Fierro, M, Odorici, F, Duerdoth, IP, Wells, PS, Wagner, A, Zacek, V, Bloomer, JE, Trocsanyi, Z, Ward, CP, OPAL Collaboration, Boutemeur, M, Bouwens, BT, Braibant, S, Tsur, E, Neal, HA, Brigliadori, L, Saeki, T, Watkins, PM, Ogren, HO, Brown, RM, Glenzinski, D, Barillari, T, Patrick, GN, Burckhart, HJ, Heuer, RD, Nellen, B, Gibson, WR, Kennedy, BW, Baumann, S, Posthaus, A, Burgard, C, Furtjes, A, Oh, A, Hemingway, RJ, Kress, T, Lautenschlager, SR, Doucet, M, Ruppel, U, Burgin, R, Goodrick, MJ, Jost, U, Lazic, D, Patt, J, Capiluppi, P, Lellouch, D, Markus, C, Fanti, M, Talbot, SD, Carnegie, RK, Carter, AA, Carter, JR, Kayal, PI, Jovanovic, P, Martinez, G, Perez-Ochoa, R, Rees, DL, Chang, CY, McDonald, WJ, Bella, G, Bell, AN, Gascon-Shotkin, SM, Towers, S, Charlton, DG, Chrisman, D, Wolf, G, Clarke, PEL, Kokott, TP, Steuerer, J, Keeler, RK, Gascon, J, and Fong, DG
Subjects: B-mesons, Physics, OPAL jet chamber, High Energy Physics::Experiment, Detector, LEP, Beauty decays, TAU-lifetime
Abstract: We report a measurement of the B-s(0) meson lifetime from B-s(0) --> Ds-X decays, where D-s(-) mesons are reconstructed in the D-s(-) --> phi pi(-) and D-s(-) --> K*K-0(-) decay channels. From approximately 3.7 million hadronic Z(0) decays recorded by the OPAL detector at LEP a sample is selected containing 911 +/- 83 candidates, of which 519 +/- 136 are estimated to be from B-s(0) meson decays. Fitting the distribution of the distance from the beam spot to the decay vertex of the D-s(-) candidates with an unbinned likelihood function we measuretau(B-s(0)) = 1.72(-0.19-0.17)(+0.20+0.18) ps,where the errors are statistical and systematic, respectively.

11. Measurement of the W boson mass and W+W- production and decay properties in e(+)e(-) collisions at root s = 172 GeV

Author: Ackerstaff, K, Alexander, G, Allison, J, Altekamp, N, Anderson, KJ, Anderson, S, Arcelli, S, Asai, S, Axen, D, Azuelos, G, Ball, AH, Long, GD, Lusty, MJ, Ludwig, J, Macchiolo, A, Macpherson, A, Mannelli, M, Marcellini, S, Markus, C, Martin, AJ, Bell, AN, Gorn, W, Martinez, G, Mashimo, T, Mattig, P, McDonald, WJ, McKenna, J, Mckigney, EA, McMahon, TJ, McPherson, RA, Meijers, F, Menke, S, Grandi, C, Bell, KW, Merritt, FS, Mes, H, Meyer, J, Michelini, A, Mikenberg, G, Miller, DJ, Mincer, A, Mir, R, Mohr, W, Gross, E, Montanari, A, Bella, G, Mori, T, Morii, M, Muller, U, Mihara, S, Nagai, K, Nakamura, I, Neal, HA, Nellen, B, Grunhaus, J, Nisius, R, O'Neale, ST, Bentvelsen, S, Oakham, FG, Odorici, F, Ogren, HO, Oh, A, Oldershaw, NJ, Oreglia, MJ, Orito, S, Gruwe, M, Palinkas, J, Pasztor, G, Pater, JR, Bethke, S, Patrick, GN, Patt, J, Pearce, MJ, Perez-Ochoa, R, Petzold, S, Pfeifenschneider, P, Hajdu, C, Pilcher, JE, Pinfold, J, Plane, DE, Poffenberger, P, Biebel, O, Poli, B, Posthaus, A, Rees, DL, Rigby, D, Robertson, S, Hanson, GG, Robins, SA, Rodning, N, Roney, JM, Rooke, A, Ros, E, Biguzzi, A, Rossi, AM, Routenburg, P, Rozen, Y, Runge, K, Hansroul, M, Runolfsson, O, Ruppel, U, Rust, DR, Rylko, R, Sachs, K, Saeki, T, Bird, SD, Sarkisyan, EKG, Sbarra, C, Schaile, AD, Hapke, M, Schaile, O, Scharf, F, Scharff-Hansen, P, Schenk, P, Schieck, J, Schleper, P, Schmitt, B, Blobel, V, Schmitt, S, Schoning, A, Hargrove, CK, Schroder, M, Schult-Coulon, HC, Schumacher, M, Schwick, C, Scott, WG, Shears, TG, Shen, BC, Shepherd-Themistocleous, CH, Bloodworth, IJ, Sherwood, P, Barberio, E, Siroli, GP, Sittler, A, Skillman, A, Skuja, A, Smith, AM, Snow, GA, Sobie, R, Soldner-Rembold, S, Springer, RW, Bloomer, JE, Hart, PA, Sproston, M, Stephens, K, Steuerer, J, Stockhausen, B, Stoll, K, Strom, D, Szymanski, P, Tafirout, R, Talbot, SD, Tanaka, S, Hartmann, C, Bobinski, M, Taras, P, Tarem, S, Teuscher, R, Thiergen, M, Thomson, MA, von Torne, E, Towers, S, Trigger, I, Trocsanyi, Z, Hauschild, M, Tsur, E, Bock, P, Turcot, AS, Turner-Watson, MF, Utzat, P, Van Kooten, R, Verzocchi, M, Vikas, P, Vokurka, EH, Voss, H, Hawkes, CM, Wackerle, F, Wagner, A, Bonacorsi, D, Ward, CP, Ward, DR, Watkins, PM, Watson, AT, Watson, NK, Wells, PS, Wermes, N, Hawkings, R, White, JS, Wilkens, B, Wilson, GW, Boutemeur, M, Wilson, JA, Wolf, G, Wyatt, TR, Yamashita, S, Yekutieli, G, Zacek, V, Hemingway, RJ, Zer-Zion, D, OPAL Collaboration, Bouwens, BT, Braibant, S, Brigliadori, L, Brown, RM, Burckhart, HJ, Burgard, C, Burgin, R, Capiluppi, P, Herndon, M, Carnegie, RK, Carter, AA, Carter, JR, Chang, CY, Charlton, DG, Chrisman, D, Clarke, PEL, Cohen, I, Conboy, JE, Cooke, OC, Herten, G, Cuffiani, M, Dado, S, Dallapiccola, C, Dallavalle, GM, Davis, R, De Jong, S, del Pozo, LA, Desch, K, Dienes, B, Dixit, MS, Heuer, RD, Silva, EDE, Doucet, M, Duchovni, E, Duckeck, G, Duerdoth, IP, Eatough, D, Edwards, JEG, Estabrooks, PG, Evans, HG, Evans, M, Hildreth, MD, Fabbri, F, Fanti, M, Faust, AA, Fiedler, F, Fierro, M, Fischer, HM, Fleck, I, Folman, R, Fong, DG, Foucher, M, Barlow, RJ, Furtjes, A, Futyan, DI, Gagnon, P, Gary, JW, Gascon, J, Gascon-Shotkin, SM, Geddes, NI, Geich-Gimbel, C, Geralis, T, Giacomelli, G, Hill, JC, Giacomelli, P, Giacomelli, R, Gibson, V, Gibson, WR, Gingrich, DM, Glenzinski, D, Goldberg, J, Goodrick, MJ, Hillier, SJ, Hobson, PR, Homer, RJ, Honma, AK, Horvath, D, Hossain, KR, Howard, R, Huntemeyer, P, Hutchcroft, DE, Bartoldus, R, Igo-Kemenes, P, Imrie, DC, Ingram, MR, Ishii, K, Jawahery, A, Jeffreys, PW, Jeremie, H, Jimack, M, Joly, A, Jones, CR, Batley, JR, Jones, G, Jones, M, Jost, U, Jovanovic, P, Junk, TR, Karlen, D, Kartvelishvili, V, Kawagoe, K, Kawamoto, T, Kayal, PI, Baumann, S, Keeler, RK, Kellogg, RG, Kennedy, BW, Kirk, J, Klier, A, Kluth, S, Kobayashi, T, Kobel, M, Koetke, DS, Kokott, TP, Bechtluft, J, Kolrep, M, Komamiya, S, Kress, T, Krieger, P, von Krogh, J, Kyberd, P, Lafferty, GD, Lahmann, R, Lai, WP, Lanske, D, Beeston, C, Lauber, J, Lautenschlager, SR, Layter, JG, Lazic, D, Lee, AM, Lefebvre, E, Lellouch, D, Letts, J, Levinson, L, Lloyd, SL, Behnke, T, and Loebinger, FK
Subjects: Jet Cross-Sections, Physics, E+E Annihilation, Microvertex Detector, Monte-Carlo Program, LEP2/NLC, Generator, High-Energies, To-Leading Order, Pair Production

12. Measurements of the B-S(0) and Lambda(0)(b) lifetimes

Author: Ackerstaff, K, Alexander, G, Allison, J, Altekamp, N, Anderson, KJ, Anderson, S, Arcelli, S, Asai, S, Ashby, SF, Axen, D, Azuelos, G, Vikas, P, Vokurka, EH, Voss, H, Wackerle, F, Wagner, A, Hart, PA, Ward, CP, Ward, DR, Watkins, PM, Ludwig, J, Rossi, AM, Bock, P, Watson, AT, Watson, NK, Wells, PS, Wermes, N, White, JS, Wilkens, B, Hartmann, C, Wilson, GW, Wilson, JA, Routenburg, P, Behnke, T, Wyatt, TR, Yamashita, S, Bonacorsi, D, Yekutieli, G, Zacek, V, Zer-Zion, D, OPAL Collaboration, Boutemeur, M, Hauschild, M, Rozen, Y, Braibant, S, Gingrich, DM, Brigliadori, L, Brown, RM, Burckhart, HJ, Burgard, C, Burgin, R, Capiluppi, P, Carnegie, RK, Carter, AA, Runge, K, Carter, JR, Hawkes, CM, Lui, D, Chang, CY, Charlton, DG, Chrisman, D, Clarke, PEL, Cohen, I, Conboy, JE, Cooke, OC, Runolfsson, O, Couyoumtzelis, C, Coxe, RL, Cuffiani, M, Macchiolo, A, Hawkings, R, Dado, S, Dallapiccola, C, Dallavalle, GM, Davis, R, De Jong, S, Biebel, O, del Pozo, LA, Desch, K, Dienes, B, Dixit, MS, Macpherson, A, Doucet, M, Hemingway, RJ, Duchovni, E, Duckeck, G, Duerdoth, IP, Ruppel, U, Eatough, D, Edwards, JEG, Estabrooks, PG, Evans, HG, Evans, M, Mannelli, M, Fabbri, F, Fanfani, A, Barberio, E, Fanti, M, Rust, DR, Faust, AA, Feld, L, Fiedler, F, Fierro, M, Fischer, HM, Fleck, I, Marcellini, S, Folman, R, Fong, DG, Foucher, M, Rylko, R, Herndon, M, Furtjes, A, Futyan, DI, Gagnon, P, Gary, JW, Gascon, J, Gascon-Shotkin, SM, Markopoulos, C, Geddes, NI, Geich-Gimbel, C, Gruwe, M, Geralis, T, Giacomelli, G, Herten, G, Giacomelli, P, Giacomelli, R, Gibson, V, Gibson, WR, Heuer, RD, Markus, C, Hildreth, MD, Lefebvre, E, Hill, JC, Hillier, SJ, Hobson, PR, Hocker, A, Homer, RJ, Honma, AK, Barlow, RJ, Horvath, D, Hossain, KR, Martin, AJ, Sachs, K, Howard, R, Huntemeyer, P, Hutchcroft, DE, Igo-Kemenes, P, Imrie, DC, Ingram, MR, Ishii, K, Jawahery, A, Bartoldus, R, Jeffreys, PW, Saeki, T, Martin, JP, Jeremie, H, Jimack, M, Joly, A, Jones, CR, Jones, G, Jones, M, Jost, U, Jovanovic, P, Junk, TR, Sang, WM, Batley, JR, Martinez, G, Kanzaki, J, Karlen, D, Kartvelishvili, V, Kawagoe, K, Kawamoto, T, Kayal, PI, Keeler, RK, Kellogg, RG, Sarkisyan, EKG, Kennedy, BW, Kirk, J, Glenzinski, D, Baumann, S, Klier, A, Kluth, S, Kobayashi, T, Kobel, M, Koetke, DS, Kokott, TP, Sbarra, C, Kolrep, M, Komamiya, S, Kress, T, Bell, AN, Krieger, P, Bechtluft, J, von Krogh, J, Kyberd, P, Lafferty, GD, Lahmann, R, Schaile, AD, Lai, WP, Lanske, D, Lauber, J, Lautenschlager, SR, Mashimo, T, Layter, JG, Lazic, D, Beeston, C, Lee, AM, Mattig, P, Schaile, O, McDonald, WJ, McKenna, J, Mckigney, EA, McMahon, TJ, McPherson, RA, Meijers, F, Menke, S, Goldberg, J, Merritt, FS, Bell, KW, Biguzzi, A, Mes, H, Meyer, J, Michelini, A, Mikenberg, G, Miller, DJ, Mincer, A, Mir, R, Mohr, W, Goodrick, MJ, Montanari, A, Scharf, F, Mori, T, Bella, G, Muller, U, Mihara, S, Nagai, K, Nakamura, I, Neal, HA, Nellen, B, Nisius, R, Gorn, W, Scharff-Hansen, P, O'Neale, SW, Oakham, FG, Odorici, F, Bentvelsen, S, Ogren, HO, Oh, A, Oldershaw, NJ, Oreglia, MJ, Orito, S, Palinkas, J, Lellouch, D, Grandi, C, Pasztor, G, Pater, SR, Patrick, GN, Patt, J, Bethke, S, Perez-Ochoa, R, Petzold, S, Pfeifenschneider, P, Pilcher, JE, Hajdu, C, Pinfold, J, Gross, E, Plane, DE, Poffenberger, P, Poli, B, Posthaus, A, Rembser, C, Betts, S, Robertson, S, Robins, SA, Schieck, J, Rodning, N, Roney, JM, Grunhaus, J, Rooke, A, Schleper, P, Schmitt, B, Schmitt, S, Schoning, A, Schroder, M, Schultz-Coulon, HC, Schumacher, M, Bird, SD, Letts, J, Schwick, C, Ball, AH, Scott, WG, Shears, TG, Shen, BC, Shepherd-Themistocleous, CH, Sherwood, P, Siroli, GP, Sittler, A, Skillman, A, Levinson, L, Skuja, A, Blobel, V, Hanson, GG, Smith, AM, Snow, GA, Sobie, R, Soldner-Rembold, S, Springer, RW, Sproston, M, Stephens, K, Lloyd, SL, Steuerer, J, Stockhausen, B, Stoll, K, Hansroul, M, Bloodworth, IJ, Strom, D, Strohmer, R, Szymanski, P, Tafirout, R, Talbot, SD, Loebinger, FK, Tanaka, S, Taras, P, Tarem, S, Teuscher, R, Hapke, M, Thiergen, M, Bloomer, JE, Thomson, MA, von Torne, E, Torrence, E, Long, GD, Towers, S, Trigger, I, Trocsanyi, Z, Tsur, E, Turcot, AS, Hargrove, CK, Turner-Watson, MF, Utzat, P, Bobinski, M, Van Kooten, R, Losty, MJ, and Verzocchi, M
Subjects: Beauty Decays, Opal Jet Chamber, E+E Annihilation, Average Lifetime, B-Baryons, Detector, LEP, Meson, Z-Decays, Tau-Lifetime

13. Search for anomalous production of photonic events with missing energy in e(+)e(-) collisions at root s=130-172 GeV

Author: Ackerstaff, K, Alexander, G, Allison, J, Altekamp, N, Anderson, KJ, Anderson, S, Arcelli, S, Asai, S, Ashby, SF, Axen, D, Azuelos, G, Ball, AH, Barberio, E, Barlow, RJ, Bartoldus, R, Batley, JR, Baumann, S, Bechtluft, J, Beeston, C, Behnke, T, Bell, AN, Bell, KW, Bella, G, Bentvelsen, S, Bethke, S, Betts, S, Biebel, O, Biguzzi, A, Bird, SD, Blobel, V, Bloodworth, IJ, Bloomer, JE, Bobinski, M, Bock, P, Bonacorsi, D, Boutemeur, M, Braibant, S, Brigliadori, L, Brown, RM, Burckhart, HJ, Burgard, C, Burgin, R, Capiluppi, P, Carnegie, RK, Carter, AA, Carter, JR, Chang, CY, Charlton, DG, Chrisman, D, Clarke, PEL, Cohen, I, Conboy, JE, Cooke, OC, Couyoumtzelis, C, Coxe, RL, Cuffiani, M, Dado, S, Dallapiccola, C, Dallavalle, GM, Davis, R, De Jong, S, del Pozo, LA, Desch, K, Dienes, B, Dixit, MS, Doucet, M, Duchovni, E, Duckeck, G, Duerdoth, IP, Eatough, D, Edwards, JEG, Estabrooks, PG, Evans, HG, Evans, M, Fabbri, F, Fanfani, A, Fanti, M, Faust, AA, Feld, L, Fiedler, F, Fierro, M, Fischer, HM, Fleck, I, Folman, R, Fong, DG, Foucher, M, Furtjes, A, Futyan, DI, Gagnon, P, Gary, JW, Gascon, J, Gascon-Shotkin, SM, Geddes, NI, Geich-Gimbel, C, Geralis, T, Giacomelli, G, Giacomelli, P, Giacomelli, R, Gibson, V, Gibson, WR, Gingrich, DM, Glenzinski, D, Goldberg, J, Goodrick, MJ, Gorn, W, Grandi, C, Gross, E, Grunhaus, J, Gruwe, M, Hajdu, C, Hanson, GG, Hansroul, M, Hapke, M, Hargrove, CK, Hart, PA, Hartmann, C, Hauschild, M, Hawkes, CM, Hawkings, R, Hemingway, RJ, Herndon, M, Herten, G, Heuer, RD, Hildreth, MD, Hill, JC, Hillier, SJ, Hobson, PR, Hocker, A, Homer, RJ, Honma, AK, Horvath, D, Hossain, KR, Howard, R, Huntemeyer, P, Hutchcroft, DE, Igo-Kemenes, P, Imrie, DC, Ingram, MR, Ishii, K, Jawahery, A, Jeffreys, PW, Jeremie, H, Jimack, M, Joly, A, Jones, CR, Jones, G, Jones, M, Jost, U, Jovanovic, P, Junk, TR, Kanzaki, J, Karlen, D, Kartvelishvili, V, Kawagoe, K, Kawamoto, T, Kayal, PL, Keeler, RK, Kellogg, RG, Kennedy, BW, Kirk, J, Klier, A, Kluth, S, Kobayashi, T, Kobel, M, Koetke, DS, Kokott, TP, Kolrep, M, Komamiya, S, Kress, T, Krieger, P, von Krogh, J, Kyberd, P, Lafferty, GD, Lahmann, R, Lai, WP, Lanske, D, Lauber, J, Lautenschlager, SR, Layter, JG, Lazic, D, Lee, AM, Lefebvre, E, Lellouch, D, Letts, J, Levinson, L, Lloyd, SL, Loebinger, FK, Long, GD, Losty, MJ, Ludwig, J, Lui, D, Macchiolo, A, Macpherson, A, Mannelli, M, Marcellini, S, Markopoulos, C, Markus, C, Martin, AJ, Martin, JP, Martinez, G, Mashimo, T, Mattig, P, McDonald, WJ, McKenna, J, Mckigney, EA, McMahon, TJ, McPherson, RA, Meijers, F, Menke, S, Merritt, FS, Mes, H, Meyer, J, Michelini, A, Mikenberg, G, Miller, DJ, Mincer, A, Mir, R, Mohr, W, Montanari, A, Mori, T, Muller, U, Mihara, S, Nagai, K, Nakamura, I, Neal, HA, Nellen, B, Nisius, R, O'Neale, SW, Oakham, FG, Odorici, F, Ogren, HO, Oh, A, Oldershaw, NJ, Oreglia, MJ, Orito, S, Palinkas, J, Pasztor, G, Pater, JR, Patrick, GN, Patt, J, Perez-Ochoa, R, Petzold, S, Pfeifenschneider, P, Pilcher, JE, Pinfold, J, Plane, JE, Poffenberger, P, Poli, B, Posthaus, A, Rembser, C, Robertson, S, Robins, SA, Rodning, N, Roney, JM, Rooke, A, Rossi, AM, Routenburg, R, Rozen, Y, Runge, K, Runolfsson, O, Ruppel, U, Rust, DR, Rylko, R, Sachs, K, Saeki, T, Sang, WM, Sarkisyan, EKG, Sbarra, C, Schaile, AD, Schaile, O, Scharf, F, Scharff-Hansen, P, Schieck, J, Schleper, P, Schmitt, B, Schmitt, S, Schoning, A, Schroder, M, Schultz-Coulon, HC, Schumacher, M, Schwick, C, Scott, WG, Shears, TG, Shen, BC, Shepherd-Themistocleous, CH, Sherwood, P, Siroli, GP, Sittler, A, Skillman, A, Skuja, A, Smith, AM, Snow, GA, Sobie, R, Soldner-Rembold, S, Springer, RW, Sproston, M, Stephens, K, Steurer, J, Stockhausen, B, Stoll, K, Strom, D, Strohmer, R, Szymanski, P, Tafirout, R, Talbot, SD, Tanaka, S, Taras, P, Tarem, S, Teuscher, R, Thiergen, M, Thomson, MA, von Torne, E, Torrence, E, Towers, S, Trigger, I, Trocsanyi, Z, Tsur, E, Turcot, AS, Turner-Watson, MF, Utzat, P, Van Kooten, R, Verzocchi, M, Vikas, P, Vokurka, EH, Voss, H, Wackerle, F, Wagner, A, Ward, CP, Ward, DR, Watkins, PM, Watson, AT, Watson, NK, Wells, PS, Wermes, N, White, JS, Wilkens, B, Wilson, GW, Wilson, JA, Wyatt, TR, Yamashita, S, Yekutieli, G, Zacek, V, Zer-Zion, D, and OPAL Collaboration
Subjects: INVISIBLE WIDTH, E+E ANNIHILATION, OF-MASS ENERGIES, SINGLE PHOTONS, OPAL EXPERIMENT, LIGHT GRAVITINO, LEP, NEUTRINO, MICROVERTEX DETECTOR, Z-DECAYS

14. Production of f(0)(980), f(2)(1270) and phi(1020) in hadronic Z(0) decay

Author: Ackerstaff, K., Alexander, G., Allison, J., Altekamp, N., Anderson, Kj, Anderson, S., Arcelli, S., Asai, S., Ashby, Sf, Axen, D., Azuelos, G., Ball, Ah, Barbeiro, E., Barlow, Rj, Bartoldus, R., Batley, Jr, Baumann, S., Bechtluft, J., Behnke, T., Bell, Kw, Bella, G., Bentvelsen, S., Bethke, S., Betts, S., Biebel, O., Biguzzi, A., Bird, Sd, Blobel, V., Bloodworth, Ij, Bobinski, M., Bock, P., Bonacorsi, D., Boutemeur, M., Braibant, S., Brigliadori, L., Brown, Rm, Bruckhart, Hj, Burgard, C., Burgin, R., Capiluppi, P., Carnegie, Rk, Carter, Aa, Carter, Jr, Chang, Cy, Charlton, Dg, Chrisman, D., Clarke, Pel, Cohen, I., Conboy, Je, Cooke, Oc, Couyoumtzelis, C., Coxe, Rl, Cuffiani, M., Dado, S., Dallapiccola, C., Dallavalle, Gm, Davis, R., Jong, S., Del Pozo, La, Roeck, A., Desch, K., Dienes, B., Dixit, Ms, Mathieu Doucet, Duchovni, E., Duckeck, G., Duerdoth, Ip, Eatough, D., Estabrooks, Pg, Etzion, E., Evans, Hg, Evans, M., Fabbri, F., Fanfani, A., Fanti, M., Faust, Aa, Feld, L., Fiedler, F., Fierro, M., Fischer, Hm, Fleck, I., Folman, R., Fong, Dg, Foucher, M., Furtjes, A., Futyan, Di, Gagnon, P., Gary, Jw, Gascon, J., Gascon-Shotkin, Sm, Geddes, Ni, Geich-Gimbel, C., Geralis, T., Giacomelli, G., Giacomelli, P., Giacomelli, R., Gibson, V., Gibson, Wr, Gingrich, Dm, Glenzinski, D., Goldberg, J., Goodrick, Mj, Gorn, W., Grandi, C., Gross, E., Grunhaus, J., Gruwe, M., Hadju, C., Hanson, Gg, Hansroul, M., Hapke, M., Hargrove, Ck, Hart, Pa, Hartmann, C., Hauschild, M., Hawkes, Cm, Hawkings, R., Hemingway, Rj, Herndon, M., Herten, G., Heuer, Rd, Hildreth, Md, Hill, Jc, Hillier, Sj, Hobson, Pr, Hocker, A., Homer, Rj, Honma, Ak, Horvath, D., Hossain, Kr, Howard, R., Huntemeyer, P., HUTCHCROFT, DE, Igo-Kemenes, P., Imrie, Dc, Ishii, K., Jawahery, A., Jeffreys, Pw, Jeremie, H., Jimack, M., Joly, A., Jones, Cr, Jones, M., Jost, U., Jovanovic, P., Junk, Tr, Kanzaki, J., Karlen, D., Kartvelishvili, V., Kawagoe, K., Kawamoto, T., Kayal, Pi, Keeler, Rk, Kellogg, Rg, Kennedy, Bw, Kirk, J., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Koetke, Ds, Kokott, Tp, Kolrep, M., Komamiya, S., Kowalewski, Rv, Kress, T., Krieger, P., Krogh, J., Kyberd, P., Lafferty, Gd, Lahmann, R., Lai, Wp, Lanske, D., Lauber, J., Lautenschlager, Sr, Lawson, I., Layter, Jg, Lazic, D., Lee, Am, Lefebvre, E., Lellouch, D., Letts, J., Levinson, L., List, B., Lloyd, Sl, Loebinger, Fk, Long, Gd, Losty, Mj, Ludwig, J., Lui, D., Macchiolo, A., Macpherson, A., Mannelli, M., Marcellini, S., Markopoulos, C., Markus, C., Martin, Aj, Martin, Jp, Martinez, G., Mashimo, T., Mattig, P., Mcdonald, Wj, Mckenna, J., Mckigney, Ea, Mcmahon, Tj, Mcpherson, Ra, Meijers, F., Menke, S., Merritt, Fs, Mes, H., Meyer, J., Michelini, A., Mihara, S., Mikenberg, G., Miller, Dj, Mincer, A., Mir, R., Mohr, W., Montanari, A., Mori, T., Nagai, K., Nakamura, I., Neal, Ha, Nellen, B., Nisius, R., O Neale, Sw, Oakham, Fg, Odorici, F., Ogren, Ho, Oh, A., Oldershaw, Nj, Oreglia, Mj, Orito, S., Palinkas, J., Pasztor, G., Pater, Jr, Patrick, Gn, Patt, J., Perez-Ochoa, R., Petzold, S., Pfeifenschneider, P., Pilcher, Je, Pinfold, J., PLANE, DE, Poffenberger, P., Poli, B., Posthaus, A., Rembser, C., Robertson, S., Robins, Sa, Rodning, N., Roney, Jm, Rooke, A., Rossi, Am, Routenburg, P., Rozen, Y., Runge, K., Runolfsson, O., Ruppel, U., Rust, Dr, Sachs, K., Saeki, T., Sahr, O., Sang, Wm, Sarkisyan, Ek, Sbarra, C., Schaile, Ad, Schaile, O., Scharf, F., Scharff-Hansen, P., Schieck, J., Schleper, P., Schmitt, B., Schmitt, S., Schoning, A., Schroder, M., Schumacher, M., Schwick, C., Scott, Wg, Shears, Tg, Shen, Bc, Shepherd-Themistocleous, Ch, Sherwood, P., Siroli, Gp, Sittler, A., Skillman, A., Skuja, A., Smith, Am, Snow, Ga, Sobie, R., Soldner-Rembold, S., Springer, Rw, Sproston, M., Stephens, K., Steuerer, J., Stockhausen, B., Stoll, K., Strom, D., Strohmer, R., Szymanski, P., Tafirout, R., Talbot, Sd, Taras, P., Tarem, S., Teuscher, R., Thiergen, M., Thomson, Ma, Torne, E., Torrence, E., Towers, S., Trigger, I., Trocsanyi, Z., Tsur, E., Turcot, As, Turner-Watson, Mf, Ueda, I., Utzat, P., Kooten, R., Vannerem, P., Verzocchi, M., Vikas, P., Vokurka, Eh, Voss, H., Wackerle, F., Wagner, A., Ward, Cp, Ward, Dr, Watkins, Pm, Watson, At, Watson, Nk, Wells, Ps, Wermes, N., White, Js, Wilson, Gw, Wilson, Ja, Wyatt, Tr, Yamashita, S., Yekutieli, G., Zacek, V., and Zer-Zion, D.
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Particle Physics - Experiment
Abstract: Inclusive production of the f_0(980), f_2(1270) and \phi(1020) resonances has been studied in a sample of 4.3 million hadronic Z^0 decays from the OPAL experiment at LEP. A coupled channel analysis has been used for the f_0 in simultaneous fits to the resonances in inclusive \pi+\pi- and K+K- mass spectra. Fragmentation functions are reported for the three states. Total inclusive rates are measured to be 0.141 +/- 0.007 +/- 0.011 f_0, 0.155 +/- 0.011 +/- 0.018 f_2, and 0.091 +/- 0.002 +/- 0.003 \phi mesons per hadronic Z^0 decay. The production properties of the f_0, including those in three-jet events, are compared with those of the f_2 and \phi, and with the Lund string model of hadron production. All measurements are consistent with the hypothesis that the f_0 is a conventional qq(bar) scalar meson. Inclusive production of the f_0(980), f_2(1270) and \phi(1020) resonances has been studied in a sample of 4.3 million hadronic Z^0 decays from the OPAL experiment at LEP. A coupled channel analysis has been used for the f_0 in simultaneous fits to the resonances in inclusive \pi+\pi- and K+K- mass spectra. Fragmentation functions are reported for the three states. Total inclusive rates are measured to be 0.141 +/- 0.007 +/- 0.011 f_0, 0.155 +/- 0.011 +/- 0.018 f_2, and 0.091 +/- 0.002 +/- 0.003 \phi mesons per hadronic Z^0 decay. The production properties of the f_0, including those in three-jet events, are compared with those of the f_2 and \phi, and with the Lund string model of hadron production. All measurements are consistent with the hypothesis that the f_0 is a conventional qq(bar) scalar meson. Inclusive production of the f_0(980), f_2(1270) and \phi(1020) resonances has been studied in a sample of 4.3 million hadronic Z^0 decays from the OPAL experiment at LEP. A coupled channel analysis has been used for the f_0 in simultaneous fits to the resonances in inclusive \pi+\pi- and K+K- mass spectra. Fragmentation functions are reported for the three states. Total inclusive rates are measured to be 0.141 +/- 0.007 +/- 0.011 f_0, 0.155 +/- 0.011 +/- 0.018 f_2, and 0.091 +/- 0.002 +/- 0.003 \phi mesons per hadronic Z^0 decay. The production properties of the f_0, including those in three-jet events, are compared with those of the f_2 and \phi, and with the Lund string model of hadron production. All measurements are consistent with the hypothesis that the f_0 is a conventional qq(bar) scalar meson. Inclusive production of the f_0(980), f_2(1270) and \phi(1020) resonances has been studied in a sample of 4.3 million hadronic Z^0 decays from the OPAL experiment at LEP. A coupled channel analysis has been used for the f_0 in simultaneous fits to the resonances in inclusive \pi+\pi- and K+K- mass spectra. Fragmentation functions are reported for the three states. Total inclusive rates are measured to be 0.141 +/- 0.007 +/- 0.011 f_0, 0.155 +/- 0.011 +/- 0.018 f_2, and 0.091 +/- 0.002 +/- 0.003 \phi mesons per hadronic Z^0 decay. The production properties of the f_0, including those in three-jet events, are compared with those of the f_2 and \phi, and with the Lund string model of hadron production. All measurements are consistent with the hypothesis that the f_0 is a conventional qq(bar) scalar meson.

15. Spin alignment of leading K*(892)degrees mesons in hadronic Z degrees decays

Author: Ackerstaff, K., Alexander, G., Allison, J., Altekamp, N., Anderson, Kj, Anderson, S., Arcelli, S., Asai, S., Axen, D., Azuelos, G., Ball, Ah, Barberio, E., Barillari, T., Barlow, Rj, Bartoldus, R., Batley, Jr, Baumann, S., Bechtluft, J., Beeston, C., Behnke, T., Bell, An, Bell, Kw, Bella, G., Bentvelsen, S., Bethke, S., Biebel, O., Biguzzi, A., Bird, Sd, Blobel, V., Bloodworth, Ij, Bloomer, Je, Bobinski, M., Bock, P., Bonacorsi, D., Boutemeur, M., Bouwens, Bt, Braibant, S., Brigliadori, L., Brown, Rm, Burckhardt, Hj, Burgard, C., Burgin, R., Capiluppi, P., Carnegie, Rk, Carter, Aa, Carter, Jr, Chang, Cy, Charlton, Dg, Chrisman, D., Clarke, Pel, Cohen, I., Conboy, Je, Cooke, Oc, Cuffiani, M., Dado, S., Dallapiccola, C., Dallavalle, Gm, Davis, R., Dejong, S., Delpozo, La, Desch, K., Dienes, B., Dixit, Ms, Silva, Edc, Mathieu Doucet, Duchovni, E., Duckeck, G., Duerdoth, Ip, Eatough, D., Edwards, Jeg, Estabrooks, Pg, Evans, Hg, Evans, M., Fabbri, F., Fanti, M., Faust, Aa, Fiedler, F., Fierro, M., Fischer, Hm, Fleck, I., Folman, R., Fong, Dg, Foucher, M., Furtjes, A., Futyan, Di, Gagnon, P., Gary, Jw, Gascon, J., Gasconshotkin, Sm, Geddes, Ni, Geichgimbel, C., Geralis, T., Giacomelli, G., Giacomelli, P., Giacomelli, R., Gibson, V., Gibson, Wr, Gingrich, Dm, Glenzinski, D., Goldberg, J., Goodrick, Mj, Gorn, W., Grandi, W., Gross, E., Grunhaus, J., Gruwe, M., Hajdu, C., Hanson, Gg, Hansroul, M., Hapke, M., Hargrove, Ck, Hart, Pa, Hartmann, C., Hauschild, M., Hawkes, Cm, Hawkings, R., Hemingway, Rj, Herndon, M., Herten, G., Heuer, Rd, Hildreth, Md, Hill, Jc, Hillier, Sj, Hobson, Pr, Homer, Rj, Honma, Ak, Horvath, D., Hossain, Kr, Howard, R., Huntemeyer, P., HUTCHCROFT, DE, Igokemenes, P., Imrie, Dc, INGRAM, MR, Ishii, K., Jawahery, A., Jeffreys, Pw, Jeremie, H., Jimack, M., Joly, A., Jones, Cr, Jones, G., Jones, M., Jost, U., Jovanovic, P., Junk, Tr, Karlen, D., Kartvelishvili, V., Kawagoe, K., Kawamoto, T., Kayal, Pi, Keeler, Rk, Kellogg, Rg, Kennedy, Bw, Kirk, J., Klier, A., Kluth, S., Kobayashi, T., Kobel, M., Koetke, Ds, Kokott, Tp, Kolrep, M., Komamiya, S., Kress, T., Krieger, P., Vonkrogh, J., Kyberd, P., Lafferty, Gd, Lahmann, R., Lai, Wp, Lanske, D., Lauber, J., Lautenschlager, Sr, Layter, Jg, Lazic, D., Lee, Am, Lefebvre, E., Lellouch, D., Letts, J., Levinson, L., Lloyd, Sl, Loebinger, Fk, Long, Gd, Losty, Mj, Ludwig, J., Macchiolo, A., Macpherson, A., Mannelli, M., Marcellini, S., Markus, C., Martin, Aj, Martin, Jp, Martinez, G., Mashimo, T., Mattig, P., Mcdonald, Wj, Mckenna, J., Mckigney, Ea, Mcmahon, Tj, Mcpherson, Ra, Meijers, F., Menke, S., Merritt, Fs, Mes, H., Meyer, J., Michelini, A., Mikenberg, G., Miller, Dj, Mincer, A., Mir, R., Mohr, W., Montanari, A., Mori, T., Morii, M., Muller, U., Mihara, S., Nagaki, K., Nakamura, I., Neal, Ha, Nellen, B., Nisius, R., Oneale, Sw, Oakham, Fg, Odorici, F., Ogren, Ho, Oh, A., Oldershaw, Nj, Oreglia, Mj, Orito, S., Palinkas, J., Pasztor, G., Pater, Jr, Patrick, Gn, Patt, J., Pearce, Mj, Perezochoa, R., Petzold, S., Pfeifenschneider, P., Pilcher, Je, Pinfold, J., PLANE, DE, Poffenberger, P., Poli, B., Posthaus, A., Rees, Dl, Rigby, D., Robertson, S., Robins, Sa, Rodning, N., Roney, Jm, Rooke, A., Ros, E., Rossi, Am, Routenburg, P., Rozen, Y., Runge, K., Runolfsson, O., Ruppel, U., Rust, Dr, Rylko, R., Sachs, K., Saeki, T., Sarkisyan, Ekg, Sbarra, C., Schaile, Ad, Schaile, O., Scharf, F., Scharffhansen, P., Schenk, P., Schieck, J., Schleper, P., Schmitt, B., Schmitt, S., Schoning, A., Schroder, M., Schultzcoulon, Hc, Schumacher, M., Schwick, C., Scott, Wg, Shears, Tg, Shen, Bc, Shepherdthemistocleous, Ch, Sherwood, P., Siroli, Gp, Sittler, A., Skillman, A., Skuja, A., Smith, Am, Snow, Ga, Sobie, R., Soldnerrembold, S., Springer, Rw, Sproston, M., Stephens, K., Steuerer, J., Stockhausen, B., Stoll, K., Strom, D., Szymanski, P., Tafirout, R., Talbot, Sd, Tanaka, S., Taras, P., Tarem, S., Teuscher, R., Thiergen, M., Thomson, Ma, Vontorne, E., Towers, S., Trigger, I., Trocsanyi, Z., Tsur, E., Turcot, As, Turnerwatson, Mf, Utzat, P., Vankooten, R., Verzocchi, M., Vikas, P., Vokurka, Eh, Voss, H., Wackerle, F., Wagner, A., Ward, Cp, Ward, Dr, Watkins, Pm, Watson, At, Watson, Nk, Wells, Ps, Wermes, N., White, Js, Wilkens, B., Wilson, Gw, Wilson, Ja, Wolf, G., Wyatt, Tr, Yamashita, S., Yekutieli, G., Zacek, V., and Zerzion, D.
Subjects: OPAL, E+E-PHYSICS, LUND MONTE-CARLO, High Energy Physics::Experiment, LEP, MICROVERTEX DETECTOR, vector, JET FRAGMENTATION
Abstract: Helicity density matrix elements for inclusive K*(892)(0) mesons from hadronic Z(0) decays have been measured over the full range of K*(0) momentum using data taken with the OPAL experiment at LEP. A preference for occupation of the helicity zero state is observed at all scaled momentum x(p) values above 0.3, with the matrix element rho(00) rising to 0.66+/-0.11 for x(p)>0.7. The values of the real part of the off-diagonal element rho(1-1) are negative at large x(p), with a weighted average value of -0.09+/-0.03 for x(p)>0.3, in agreement with new theoretical predictions based on Standard Model parameters and coherent fragmentation of the q (q) over bar system from the Z(0) decay. All other helicity density matrix elements measured are consistent with zero over the entire x(p) range. The K*(0) fragmentation function has also been measured and the total rate determined to be 0.74+/-0.02+/-0.02 K*(892)(0) mesons per hadronic Z(0) decay. (C) 1997 Published by Elsevier Science B.V.

16. The Ba'thification of Iraq : Saddam Hussein's Totalitarianism

Author: Faust, Aaron M. and Faust, Aaron M.
Published: 2015
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1. Polarization and forward-backward asymmetry of $\Lambda$ baryons in hadronic Z $^0$ decays

2. Precision Luminosity for Z0 Lineshape Measurements with a Silicon-Tungsten Calorimeter

3. A Measurement of Rb using a Double Tagging Method

4. Multi-photon final states in e(+)e(-) collisions at root s=130-172 GeV

5. Measurement of f(c -> D(+),X), f(b -> D(+),X) and Gamma(c(c)over-bar)/Gamma(had) using D*(+/-) mesons

6. Search for anomalous production of di-lepton events with missing transverse momentum in e(+)e(-) collisions at root s = 161 and 172 GeV

7. Search for a massive Di-photon resonance at root s=91-172 GeV

8. A study of B meson oscillations using hadronic $Z^0$ decays containing leptons

9. Search for the Standard Model Higgs Boson in e^+e^- Collisions at sqrt{s} = 161-172 GeV

10. A measurement of the B-s(0) lifetime using reconstructed D-s(-) mesons

11. Measurement of the W boson mass and W+W- production and decay properties in e(+)e(-) collisions at root s = 172 GeV

12. Measurements of the B-S(0) and Lambda(0)(b) lifetimes

13. Search for anomalous production of photonic events with missing energy in e(+)e(-) collisions at root s=130-172 GeV

14. Production of f(0)(980), f(2)(1270) and phi(1020) in hadronic Z(0) decay

15. Spin alignment of leading K*(892)degrees mesons in hadronic Z degrees decays

16. The Ba'thification of Iraq : Saddam Hussein's Totalitarianism

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