Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/20673
Title: Precision luminosity for Z(0) lineshape measurements with a silicon-tungsten calorimeter
Authors: 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
Keywords: BHABHA SCATTERING;OPAL DETECTOR;E+E ANNIHILATION;MICROVERTEX DETECTOR;TOTAL CROSS-SECTION;INCLUSIVE MUON PRODUCTION;CMOS SIGNAL PROCESSOR;ELECTROWEAK PARAMETERS;SMALL-ANGLE;LOW-NOISE
Issue Date: 1-Jun-2000
Publisher: Springer Verlag
Citation: European Physical Journal C, 2000, 14 (3), pp. 373 - 425
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 betn een 25 and 58 mrad. At LEP center-of-mass energies around the Z(0), about half of all Bhabha electrons entering the detector fall within a 79 nb 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 2.5 mm width. The fine segmentation of the detector, combined with the precise knowledge of its physical dimensions, allows the trajectories of incoming 45 GeV electrons or photons to be determined with a total systematic error of less than 7 microns. We have quantified all significant sources of systematic experimental error in the luminosity determination Lv direct physical measurement. All measured properites of the luminosity event sample are found to bk 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(inv)/Gamma(l+l-), a quantity of basic physical interest which depends crucially on the luminosity measurement.
URI: http://bura.brunel.ac.uk/handle/2438/20673
ISSN: 1434-6044
Appears in Collections:Dept of Electronic and Computer Engineering Research Papers

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