Search for an excess in the production of four-jet events from e+e- collisions at √s = 130-184 GeV

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

Volumn 429, Issue 3-4, 1998, Pages 399-413

  Ackerstaff, K ^g   Alexander, G ^u   Allison, J ^o   Altekamp, N ^e   Anderson, K J ^k   Anderson, S ^k   Arcelli, S ^b   Asai, S ^v,w   Ashby, S F ^a   Axen, D ^ab   Azuelos, G ^k,q   Ball, A H ^p   Barberio, E ^g   Barlow, R J ^o   Bartoldus, R ^c   Batley, J R ^e   Baumann, S ^c   Bechtluft, J ^m   Behnke, T ^g   Bell, K W ^s   Bella, G ^u   Bentvelsen, S ^g   Bethke, S ^m   Betts, S ⁿ   Biebel, O ^m   Biguzzi, A ^e   Bird, S D ^o   Blobel, V ^z   Bloodworth, I J ^a   Bobinski, M ⁱ   Bock, P ^j   Bonacorsi, D ^b   Boutemeur, M ^ag   Braibant, S ^g   Brigliadori, L ^b   Brown, R M ^s   Burckhart, H J ^g   Burgard, C ^g   Burgin R ⁱ   Capiluppi, P ^b   Carnegie, R K ^f   Carter, A A ^l   Carter, J R ^e   Chang, C Y ^p   Charlton, D G ^a,ai   Chrisman, D ^d   Clarke, P E L ⁿ   Cohen, I ^u   Conboy, J E ⁿ   Cooke, O C ^g   Couyoumtzelis, C ^l   Coxe, R L ^h   Cuffiani, M ^b   Dado, S ^t   Dallapiccola, C ^p   Dallavalle, G M ^b   Davis, R ^ac   de Jong, S ^k   del Pozo, L A ^d   de Roeck, A ^g   Desch, K ^g   Dienes, B ^af,aj   Dixit, M S ^f   Doucet, M ^q   Duchovni, E ^y   Duckeck, G ^ag   Duerdoth, I P ^o   Eatough, D ^o   Estabrooks, P G ^f   Etzion, E ^u   Evans, H G ^h   Evans, M ^l   Fabbri, F ^b   Fanfani, A ^b   Fanti, M ^b   Faust, A A ^ac   Feld, L ^g   Fiedler, F ^z   Fierro, M ^b   Fischer, H M ^c   Fleck, I ^g   Folman, R ^y   Fong, D G ^p   Foucher, M ^p   Furtjes A ^g   Futyan, D I ^o   Gagnon, P ^f   Gary, J W ^d   Gascon, J ^q   Gascon Shotkin, S M ^p   Geddes, N I ^s   Geich Gimbel, C ^c   Geralis, T ^s   Giacomelli, G ^b   Giacomelli, P ^d   Giacomelli, R ^b   Gibson, V ^e   Gibson, W R ^l   Gingrich, D M ^k,ac   Glenzinski, D ^h   Goldberg, J ^t   Goodrick, M J ^e   Gorn, W ^d   Grandi, C ^b   Gross, E ^y   Grunhaus, J ^u   Gruwe M ^z   Hajdu, C ^ae   Hanson, G G ^k   Hansroul, M ^g   Hapke, M ^l   Hargrove, C K ^f   Hart, P A ^h   Hartmann, C ^c   Hauschild, M ^g   Hawkes, C M ^e   Hawkings, R ^z   Hemingway, R J ^f   Herndon, M ^p   Herten, G ⁱ   Heuer, R D ^g   Hildreth, M D ^g   Hill, J C ^e   Hillier, S J ^a   Hobson, P R ^x   Hocker, A ^h   Homer, R J ^a   Honma, A K ^aa,ah   Horvath, D ^ae,af   Hossain, K R ^ac   Howard, R ^ab   Huntemeyer, P ^z   Hutchcroft, D E ^e   Igo Kemenes, P ^j   Imrie, D C ^x   Ishii, K ^v,w   Jawahery, A ^p   Jeffreys, P W ^s   Jeremie, H ^q   Jimack, M ^a   Joly, A ^q   Jones, C R ^e   Jones, M ^f   Jost, U ^j   Jovanovic, P ^a   Junk, T R ^g   Kanzaki, J ^v,w   Karlen, D ^f   Kartvelishvili, V ^o   Kawagoe, K ^v,w   Kawamoto, T ^v,w   Kayal, P I ^ac   Keeler, R K ^aa   Kellogg, R G ^p   Kennedy, B W ^s   Kirk, J ^ab   Klier, A ^y   Kluth, S ^g   Kobayashi, T ^v,w   Kobel, M ⁱ   Koetke, D S ^f   Kokott, T P ^c   Kolrep, M ⁱ   Komamiya, S ^v,w   Kowalewski, R V ^aa   Kress, T ^j   Krieger, P ^f   von Krogh, J ^j   Kyberd, P ^l   Lafferty, G D ^o   Lahmann, R ^p   Lai, W P ^r   Lanske, D ^m   Lauber, J ⁿ   Lautenschlager, S R ^ad   Lawson, I ^aa   Layter, J G ^d   Lazic, D ^t   Lee, A M ^ad   Lefebvre, E ^q   Lellouch, D ^y   Letts, J ^k   Levinson, L ^y   List, B ^g   Lloyd, S L ^l   Loebinger, F K ^o   Long, G D ^aa   Losty, M J ^f   Ludwig, J ⁱ   Lui, D ^b   Macchiolo, A ^b   Macpherson, A ^ac   Mannelli, M ^g   Marcellini, S ^b   Markopoulos, C ^l   Markus, C ^c   Martin, A J ^l   Martin, J P ^q   Martinez, G ^p   Mashimo, T ^v,w   Mattig, P ^y   McDonald, W J ^ac   McKenna, J ^ab   Mckigney, E A ⁿ   McMahon, T J ^a   McPherson, R A ^aa   Meijers, F ^g   Menke, S ^c   Merritt, F S ^h   Mes, H ^f   Meyer, J ^z   Michelini, A ^b   Mihara, S ^v,w   Mikenberg, G ^y   Miller, D J ⁿ   Mincer, A ^t,ak   Mir, R ^y   Mohr, W ⁱ   Montanari, A ^b   Mori, T ^v,w   Nagai, K ^y   Nakamura, I ^v,w   Neal, H A ^c   Nellen, B ^c   Nisius, R ^g   O'Neale, S W ^a   Oakham, F G ^f   Odorici, F ^b   Ogren, H O ^k   Oh, A ^z   Oldershaw, N J ^o   Oreglia, M J ^h   Orito, S ^v,w   Palinkas J ^af,aj   Pasztor G ^ae   Pater, J R ^o   Patrick, G N ^s   Patt, J ⁱ   Perez Ochoa, R ^g   Petzold, S ^z   Pfeifenschneider, P ^m   Pilcher, J E ^h   Pinfold, J ^ac   Plane, D E ^g   Poffenberger, P ^aa   Poli, B ^b   Posthaus, A ^c   Rembser, C ^g   Robertson, S ^aa   Robins, S A ^t   Rodning, N ^ac   Roney, J M ^aa   Rooke, A ⁿ   Rossi, A M ^b   Routenburg, P ^ac   Rozen, Y ^t   Runge, K ⁱ   Runolfsson, O ^g   Ruppel, U ^m   Rust, D R ⁱ   Sachs, K ⁱ   Saeki, T ^v,w   Sahr, O ^ag   Sang, W M ^x   Sarkisyan, E K G ^u   Sbarra, C ^ab   Schaile, A D ^ag   Schaile, O ^ag   Scharf, F ^c   Scharff Hansen, P ^g   Schieck, J ^j   Schleper, P ^j   Schmitt, B ^g   Schmitt, S ^j   Schoning A ^g   Schroder, M ^g   Schumacher, M ^c   Schwick, C ^g   Scott, W G ^s   Shears, T G ^g   Shen, B C ^d   Shepherd Themistocleous, C H ^g   Sherwood, P ⁿ   Siroli, G P ^b   Sittler, A ^z   Skillman, A ⁿ   Skuja, A ^p   Smith, A M ^g   Snow, G A ^p   Sobie, R ^aa   Soldner Rembold S ⁱ   Springer, R W ^ac   Sproston, M ^s   Stephens, K ^o   Steuerer, J ^z   Stockhausen, B ^c   Stoll, K ⁱ   Strom, D ^r   Strohmer R ^ag   Szymanski, P ^s   Tafirout, R ^q   Talbot, S D ^a   Taras, P ^q   Tarem, S ^t   Teuscher, R ^g   Thiergen, M ⁱ   Thomson, M A ^g   von Torne E ^c   Torrence, E ^g   Towers, S ^f   Trigger, I ^q   Trocsanyi Z ^af   Tsur, E ^u   Turcot, A S ^h   Turner Watson, M F ^g   Ueda, I ^v,w   Utzat, P ^j   van Kooten, R ⁱ   Vannerem, P ⁱ   Verzocchi, M ⁱ   Vikas, P ^q   Vokurka, E H ^o   Voss, H ^c   Wackerle F ⁱ   Wagner, A ^z   Ward, C P ^e   Ward, D R ^e   Watkins, P M ^a   Watson, A T ^a   Watson, N K ^a   Wells, P S ^g   Wermes, N ^c   White, J S ^aa   Wilson, G W ^z   Wilson, J A ^a   Wyatt, T R ^o   Yamashita, S ^v,w   Yekutieli, G ^y   Zacek, V ^q   Zer Zion, D ^g   more..

^a UNIVERSITY OF BIRMINGHAM   (United Kingdom)

^b UNIVERSITY OF BOLOGNA   (Italy)

^c UNIVERSITY OF BONN   (Germany)

^d UNIVERSITY OF CALIFORNIA   (United States)

^e UNIVERSITY OF CAMBRIDGE   (United Kingdom)

^f CARLETON UNIVERSITY   (Canada)

^g CERN   (Switzerland)

^h UNIVERSITY OF CHICAGO   (United States)

ⁱ UNIVERSITY OF FREIBURG   (Germany)

^j UNIVERSITY OF HEIDELBERG   (Germany)

^k INDIANA UNIVERSITY   (United States)

^l QUEEN MARY UNIVERSITY OF LONDON   (United Kingdom)

^m RWTH AACHEN UNIVERSITY   (Germany)

ⁿ UNIVERSITY COLLEGE LONDON   (United Kingdom)

^o UNIVERSITY OF MANCHESTER   (United Kingdom)

^p Bldg 142   (United States)

^q UNIVERSITÉ DE MONTRÉAL   (Canada)

^r UNIVERSITY OF OREGON   (United States)

^s RUTHERFORD APPLETON LABORATORY   (United Kingdom)

^t TECHNION ISRAEL INSTITUTE OF TECHNOLOGY   (Israel)

^u TEL AVIV UNIVERSITY   (Israel)

^v UNIVERSITY OF TOKYO   (Japan)

^w KOBE UNIVERSITY   (Japan)

^x BRUNEL UNIVERSITY   (United Kingdom)

^y WEIZMANN INSTITUTE OF SCIENCE   (Israel)

^z UNIVERSITY OF HAMBURG   (Germany)

^aa UNIVERSITY OF VICTORIA   (Canada)

^ab UNIVERSITY OF BRITISH COLUMBIA   (Canada)

^ac UNIVERSITY OF ALBERTA   (Canada)

^ad DUKE UNIVERSITY   (United States)

^ae WIGNER RESEARCH CENTRE FOR PHYSICS   (Hungary)

^af INSTITUTE OF NUCLEAR RESEARCH ATOMKI   (Hungary)

^ag UNIVERSITY OF MUNICH   (Germany)

^ah TRIUMF   (Canada)

^ai Royal Society University Research Fellow   (United States)

^aj UNIVERSITY OF DEBRECEN   (Hungary)

^ak POLYTECHNIC UNIVERSITY   (United States)

more..

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0347484476     PISSN: 03702693     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0370-2693(98)00470-5     Document Type: Article

References (46)

1. ALEPH Collaboration, D. Buskulic et al., Z. Phys. C 71 (1996) 179.
2. OPAL Collaboration, G. Alexander et al., Z. Phys. C 73 (1997) 201.
3. B. Pietrzyk, The ALEPH Four-Jet Story, LAPP-EXP-97.02, 5 May 1997, to be published in the proceedings of 33rd Rencontre de Moriond: QCD and High Energy Hadronic Interactions, Les Arcs, France, 22-29 March 1997.
4. DELPHI Collaboration, P. Abreu et al., Z. Phys. C 73 (1996) 1.
5. - annihilation at √s = 130-172 GeV, CERN preprint CERN-PPE/97-57, 30 May 1997, to be published in Phys. Lett. B
6. V. Barger, W.-Y. Keung, R.J.N. Phillips, Phys. Lett. B 364 (1995) 27.
7. D. Choudhury, D.P. Roy, Phys. Rev. D 54 (1996) 6797; P. Chankowski, D. Choudhury, S. Pokorski, Phys. Lett. B 389 (1996) 677; D.K. Ghosh, R.M. Godbole, Z. Phys. C 75 (1997) 357; G.R. Farrar, Phenomenology of Charginos and Neutralinos in the Light Gaugino Scenario, preprint RU-96- 71, e-Print Archive: hep-ph/9608387; G.R. Farrar, Phys. Rev. Lett. 76 (1996) 4115; A.K. Grant, R.D. Peccei, T. Veletto, K. Wang, Phys. Lett. B 379 (1996) 272; S.F. King, Phys. Lett. B 381 (1996) 291; H. Dreiner, S. Lola, P. Morawitz, Phys. Lett. B 389 (1996) 62.
8. D. Choudhury, D.P. Roy, Phys. Rev. D 54 (1996) 6797; P. Chankowski, D. Choudhury, S. Pokorski, Phys. Lett. B 389 (1996) 677; D.K. Ghosh, R.M. Godbole, Z. Phys. C 75 (1997) 357; G.R. Farrar, Phenomenology of Charginos and Neutralinos in the Light Gaugino Scenario, preprint RU-96- 71, e-Print Archive: hep-ph/9608387; G.R. Farrar, Phys. Rev. Lett. 76 (1996) 4115; A.K. Grant, R.D. Peccei, T. Veletto, K. Wang, Phys. Lett. B 379 (1996) 272; S.F. King, Phys. Lett. B 381 (1996) 291; H. Dreiner, S. Lola, P. Morawitz, Phys. Lett. B 389 (1996) 62.
9. D. Choudhury, D.P. Roy, Phys. Rev. D 54 (1996) 6797; P. Chankowski, D. Choudhury, S. Pokorski, Phys. Lett. B 389 (1996) 677; D.K. Ghosh, R.M. Godbole, Z. Phys. C 75 (1997) 357; G.R. Farrar, Phenomenology of Charginos and Neutralinos in the Light Gaugino Scenario, preprint RU-96- 71, e-Print Archive: hep-ph/9608387; G.R. Farrar, Phys. Rev. Lett. 76 (1996) 4115; A.K. Grant, R.D. Peccei, T. Veletto, K. Wang, Phys. Lett. B 379 (1996) 272; S.F. King, Phys. Lett. B 381 (1996) 291; H. Dreiner, S. Lola, P. Morawitz, Phys. Lett. B 389 (1996) 62.
10. D. Choudhury, D.P. Roy, Phys. Rev. D 54 (1996) 6797; P. Chankowski, D. Choudhury, S. Pokorski, Phys. Lett. B 389 (1996) 677; D.K. Ghosh, R.M. Godbole, Z. Phys. C 75 (1997) 357; G.R. Farrar, Phenomenology of Charginos and Neutralinos in the Light Gaugino Scenario, preprint RU-96-71, e-Print Archive: hep-ph/9608387; G.R. Farrar, Phys. Rev. Lett. 76 (1996) 4115; A.K. Grant, R.D. Peccei, T. Veletto, K. Wang, Phys. Lett. B 379 (1996) 272; S.F. King, Phys. Lett. B 381 (1996) 291; H. Dreiner, S. Lola, P. Morawitz, Phys. Lett. B 389 (1996) 62.
11. D. Choudhury, D.P. Roy, Phys. Rev. D 54 (1996) 6797; P. Chankowski, D. Choudhury, S. Pokorski, Phys. Lett. B 389 (1996) 677; D.K. Ghosh, R.M. Godbole, Z. Phys. C 75 (1997) 357; G.R. Farrar, Phenomenology of Charginos and Neutralinos in the Light Gaugino Scenario, preprint RU-96- 71, e-Print Archive: hep-ph/9608387; G.R. Farrar, Phys. Rev. Lett. 76 (1996) 4115; A.K. Grant, R.D. Peccei, T. Veletto, K. Wang, Phys. Lett. B 379 (1996) 272; S.F. King, Phys. Lett. B 381 (1996) 291; H. Dreiner, S. Lola, P. Morawitz, Phys. Lett. B 389 (1996) 62.
12. D. Choudhury, D.P. Roy, Phys. Rev. D 54 (1996) 6797; P. Chankowski, D. Choudhury, S. Pokorski, Phys. Lett. B 389 (1996) 677; D.K. Ghosh, R.M. Godbole, Z. Phys. C 75 (1997) 357; G.R. Farrar, Phenomenology of Charginos and Neutralinos in the Light Gaugino Scenario, preprint RU-96- 71, e-Print Archive: hep-ph/9608387; G.R. Farrar, Phys. Rev. Lett. 76 (1996) 4115; A.K. Grant, R.D. Peccei, T. Veletto, K. Wang, Phys. Lett. B 379 (1996) 272; S.F. King, Phys. Lett. B 381 (1996) 291; H. Dreiner, S. Lola, P. Morawitz, Phys. Lett. B 389 (1996) 62.
13. D. Choudhury, D.P. Roy, Phys. Rev. D 54 (1996) 6797; P. Chankowski, D. Choudhury, S. Pokorski, Phys. Lett. B 389 (1996) 677; D.K. Ghosh, R.M. Godbole, Z. Phys. C 75 (1997) 357; G.R. Farrar, Phenomenology of Charginos and Neutralinos in the Light Gaugino Scenario, preprint RU-96- 71, e-Print Archive: hep-ph/9608387; G.R. Farrar, Phys. Rev. Lett. 76 (1996) 4115; A.K. Grant, R.D. Peccei, T. Veletto, K. Wang, Phys. Lett. B 379 (1996) 272; S.F. King, Phys. Lett. B 381 (1996) 291; H. Dreiner, S. Lola, P. Morawitz, Phys. Lett. B 389 (1996) 62.
14. N.D. Hari Dass, V. Soni, An Asymptotically Free Extension of QCD and ALEPH Four-jet Events, hep-ph/9709391; M. Carena, G.F. Giudice, S. Lola, C.E.M. Wagner, Phys. Lett. B 395 (1997) 225.
15. N.D. Hari Dass, V. Soni, An Asymptotically Free Extension of QCD and ALEPH Four-jet Events, hep-ph/9709391; M. Carena, G.F. Giudice, S. Lola, C.E.M. Wagner, Phys. Lett. B 395 (1997) 225.
16. - collisions at centre-of-mass energies from 130 to 172 GeV, CERN-PPE/97-129, submitted to Phys. Lett. B.
17. OPAL Collaboration, K. Ahmet et al., Nucl. Instrum. Methods A 305 (1991) 275.
18. P.P. Allport et al., Nucl. Instrum. Methods A 346 (1994) 476; S. Anderson et al., The Extended OPAL Silicon Strip Microvertex Detector, CERN-PPE/97-092, to be published in Nucl. Instr. Meth.
19. P.P. Allport et al., Nucl. Instrum. Methods A 346 (1994) 476; S. Anderson et al., The Extended OPAL Silicon Strip Microvertex Detector, CERN-PPE/97-092, to be published in Nucl. Instr. Meth.
20. B.E. Anderson et al., IEEE Transactions on Nuclear Science 41 (1994) 845.
21. OPAL Collaboration, K. Ackerstaff et al., Tests of the Standard Model and Constraints on New Physics from Measurements of Fermion-pair Production at 130-172 GeV at LEP, CERN-PPE/97-101, to be published in Eur. Phys. J.C.
22. The LEP Energy Working Group, LEP Energy Calibration in 1996, LEP Energy Group/97-01, March 1997; Energies for LEP1.5 run, LEP Energy Group/97-04, July 1997; http://www.cern.ch/LEPECAL/reports/reports.html (for 1995-1996 centre-of-mass energies); P. Wells and LEP Energy Working Group, personal communication (preliminary for 1997 centre-of-mass energies).
23. The LEP Energy Working Group, LEP Energy Calibration in 1996, LEP Energy Group/97-01, March 1997; Energies for LEP1.5 run, LEP Energy Group/97-04, July 1997; http://www.cern.ch/LEPECAL/reports/reports.html (for 1995-1996 centre-of-mass energies); P. Wells and LEP Energy Working Group, personal communication (preliminary for 1997 centre-of-mass energies).
24. The LEP Energy Working Group, LEP Energy Calibration in 1996, LEP Energy Group/97-01, March 1997; Energies for LEP1.5 run, LEP Energy Group/97-04, July 1997; http://www.cern.ch/LEPECAL/reports/reports.html (for 1995-1996 centre-of-mass energies); P. Wells and LEP Energy Working Group, personal communication (preliminary for 1997 centre-of-mass energies).
25. PYTHIA 5.721 and JETSET 7.408 generators: T. Sjöstrand, Comp. Phys. Comm. 82 (1994) 74; T. Sjöstrand, LUTP 95-20.
26. PYTHIA 5.721 and JETSET 7.408 generators: T. Sjöstrand, Comp. Phys. Comm. 82 (1994) 74; T. Sjöstrand, LUTP 95-20.
27. EXCALIBUR generator: F.A. Berends, R. Pittau, R. Kleiss, Comp. Phys. 85 (1995) 437.
28. J. Fujimoto et al., Comp. Phys. Comm. 100 (1997) 128.
29. HERWIG generator: G. Marchesini et al., Comp. Phys. Comm. 67 (1992) 465.
30. R. Engel, J. Ranft, Phys. Rev. D 54 (1996) 4244.
31. HZHA generator: P. Janot, in: G. Altarelli, T. Sjöstrand, F. Zwirner (Eds.), Physics at LEP2, CERN 96-01, vol. 2, p. 309.
32. J. Allison et al., Nucl. Instrum. Methods A 317 (1992) 47.
33. OPAL Collaboration, G. Alexander et al., Z. Phys. C 52 (1991) 175.
34. OPAL Collab, K. Ackerstaff et al., Phys. Lett. B 389 (1996) 616.
35. N. Brown, W.J. Stirling, Phys. Lett. B 252 (1990) 657; S. Bethke, Z. Kunszt, D. Soper, W.J. Stirling, Nucl. Phys. B 370 (1992) 310; S. Catani et al., Phys. Lett. B 269 (1991) 432; N. Brown, W.J. Stirling, Z. Phys. C 53 (1992) 629.
36. N. Brown, W.J. Stirling, Phys. Lett. B 252 (1990) 657; S. Bethke, Z. Kunszt, D. Soper, W.J. Stirling, Nucl. Phys. B 370 (1992) 310; S. Catani et al., Phys. Lett. B 269 (1991) 432; N. Brown, W.J. Stirling, Z. Phys. C 53 (1992) 629.
37. N. Brown, W.J. Stirling, Phys. Lett. B 252 (1990) 657; S. Bethke, Z. Kunszt, D. Soper, W.J. Stirling, Nucl. Phys. B 370 (1992) 310; S. Catani et al., Phys. Lett. B 269 (1991) 432; N. Brown, W.J. Stirling, Z. Phys. C 53 (1992) 629.
38. N. Brown, W.J. Stirling, Phys. Lett. B 252 (1990) 657; S. Bethke, Z. Kunszt, D. Soper, W.J. Stirling, Nucl. Phys. B 370 (1992) 310; S. Catani et al., Phys. Lett. B 269 (1991) 432; N. Brown, W.J. Stirling, Z. Phys. C 53 (1992) 629.
39. OPAL Collaboration, G. Alexander et al., Phys. Lett. B 376 (1996) 232.
40. G. Parisi, Phys. Lett. B 74 (1978) 65; J.F. Donoghue, F.E. Low, S.Y. Pi, Phys. Rev. D 20 (1979) 2759.
41. G. Parisi, Phys. Lett. B 74 (1978) 65; J.F. Donoghue, F.E. Low, S.Y. Pi, Phys. Rev. D 20 (1979) 2759.
42. OPAL Collaboration, R. Akers et al., Z. Phys. C 61 (1994) 209; DELPHI Collaboration, P. Abreu et al., Phys. Lett. B 347 (1995) 447. The weighted average allows for a variation of ± 0.35 in the mean charged multiplicity of b hadrons.
43. OPAL Collaboration, R. Akers et al., Z. Phys. C 61 (1994) 209; DELPHI Collaboration, P. Abreu et al., Phys. Lett. B 347 (1995) 447. The weighted average allows for a variation of ± 0.35 in the mean charged multiplicity of b hadrons.
44. R.D. Cousins, V.L. Highland, Nucl. Instrum. Methods A 320 (1992) 331.
45. See for example V.D. Barger, R.J.N. Phillips, Collider Physics, Frontiers in Physics Lecture Note Series, Addison-Wesley, 1987, p. 120.
46. - collisions at centre-of-mass energies ranging from 130 to 184 GeV, CERN-PPE/97-156, submitted to Phys. Lett. B.