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Multihadronic events at Ec.m.=29 GeV and predictions of QCD models from Ec.m.=29 GeV to Ec.m.=93 GeV

  • Author(s): Petersen, A
  • Abrams, G
  • Adolphsen, CE
  • Akerlof, C
  • Alexander, JP
  • Alvarez, M
  • Amidei, D
  • Baden, AR
  • Ballam, J
  • Barish, BC
  • Barklow, T
  • Barnett, BA
  • Bartelt, J
  • Blockus, D
  • Bonvicini, G
  • Boyarski, A
  • Boyer, J
  • Brabson, B
  • Breakstone, A
  • Brom, JM
  • Bulos, F
  • Burchat, PR
  • Burke, DL
  • Butler, F
  • Calvino, F
  • Cence, RJ
  • Chapman, J
  • Cords, D
  • Coupal, DP
  • Destaebler, HC
  • Dorfan, DE
  • Dorfan, JM
  • Drell, PS
  • Feldman, GJ
  • Fernandez, E
  • Field, RC
  • Ford, WT
  • Fordham, C
  • Frey, R
  • Fujino, D
  • Gan, KK
  • Gidal, G
  • Gladney, L
  • Glanzman, T
  • Gold, MS
  • Goldhaber, G
  • Golding, L
  • Green, A
  • Grosse-Wiesmann, P
  • Haggerty, J
  • Hanson, G
  • Harr, R
  • Harris, FA
  • Hawkes, CM
  • Hayes, K
  • Herrup, D
  • Heusch, CA
  • Himel, T
  • Hoenk, M
  • Hollebeek, RJ
  • Hutchinson, D
  • Hylen, J
  • Innes, WR
  • Jaffre, M
  • Jaros, JA
  • Juricic, I
  • Kadyk, JA
  • Karlen, D
  • Kent, J
  • Klein, SR
  • Koide, A
  • Koska, W
  • Kozanecki, W
  • Lankford, AJ
  • Larsen, RR
  • Leclaire, BW
  • Levi, ME
  • Li, Z
  • Litke, AM
  • Lockyer, NS
  • Matteuzzi, C
  • Matthews, JAJ
  • Meyer, DI
  • Milliken, BD
  • Moffeit, KC
  • Müller, L
  • Nash, J
  • Nelson, ME
  • Nitz, D
  • Ogren, H
  • Ong, RA
  • Oshaughnessy, KF
  • Parker, SI
  • Peck, C
  • Perl, ML
  • Petradza, M
  • Porter, FC
  • Rankin, P
  • Richter, B
  • Riles, K
  • et al.
Abstract

Multihadronic e+e- annihilation events at a center-of-mass energy of 29 GeV have been studied with both the original (PEP 5) Mark II and the upgraded Mark II detectors. Detector-corrected distributions from global shape analyses such as aplanarity, Q2-Q1, sphericity, thrust, minor value, oblateness, and jet masses, and inclusive charged-particle distributions including x, rapidity, p, and particle flow are presented. These distributions are compared with predictions from various multihadron event models which use leading-logarithmic shower evolution or QCD matrix elements at the parton level and string or cluster fragmentation for hadronization. The new generation of parton-shower models gives, on the average, a better description of the data than the previous parton-shower models. The energy behavior of these models is compared to existing e+e- data. The predictions of the models at a center-of-mass energy of 93 GeV, roughly the expected mass of the Z0, are also presented. © 1988 The American Physical Society.

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