Cross-sections and leptonic forward backward asymmetries from the Z0 running of LEP

P. Abreu; Christopher Parkes; DELPHI Collaboration

Cross-sections and leptonic forward backward asymmetries from the Z0 running of LEP

P. Abreu, Christopher Parkes, DELPHI Collaboration

Research output: Contribution to journal › Article › peer-review

Abstract

During 1993 and 1995 LEP was run at 3 energies near the Z0 peak in order to give improved measurements of the mass and width of the resonance. During 1994, LEP operated only at the Z0 peak.In total DELPHI accumulated data corresponding to an integrated luminosity of approximately 116 pb−1.
Analyses of the hadronic cross-sections and of the cross-sections and forward-backward asymmetries in the leptonic channels used the most precise evaluations of the LEP energies. In the dimuon channel, events with a photon radiated from the initial state have been used to probe the cross-sections and asymmetries down to PETRA energies. Model independent fits to all DELPHI lineshape and asymmetry data from
1990 to 1995 have been carried out giving values of the resonance parameters:
MZ = 91.1863 ± 0.0028 GeV
ΓZ = 2.4876 ± 0.0041 GeV
σ0 = 41.578 ± 0.069 nb
Rl = 20.730 ± 0.060
A0
FB = 0.0187 ± 0.0019.
These values are significantly more precise than those previously published. The results are interpreted interms of the Standard Model.

Original language	English
Pages (from-to)	371-405
Number of pages	35
Journal	European Physical Journal C. Particles and Fields
Volume	16
Issue number	3
Publication status	Published - 1998

Cite this

@article{d41aca9c1a2a4a52b35f2f0db0bca238,

title = "Cross-sections and leptonic forward backward asymmetries from the Z0 running of LEP",

abstract = "During 1993 and 1995 LEP was run at 3 energies near the Z0 peak in order to give improved measurements of the mass and width of the resonance. During 1994, LEP operated only at the Z0 peak.In total DELPHI accumulated data corresponding to an integrated luminosity of approximately 116 pb−1.Analyses of the hadronic cross-sections and of the cross-sections and forward-backward asymmetries in the leptonic channels used the most precise evaluations of the LEP energies. In the dimuon channel, events with a photon radiated from the initial state have been used to probe the cross-sections and asymmetries down to PETRA energies. Model independent fits to all DELPHI lineshape and asymmetry data from1990 to 1995 have been carried out giving values of the resonance parameters:MZ = 91.1863 ± 0.0028 GeVΓZ = 2.4876 ± 0.0041 GeVσ0 = 41.578 ± 0.069 nbRl = 20.730 ± 0.060A0FB = 0.0187 ± 0.0019.These values are significantly more precise than those previously published. The results are interpreted interms of the Standard Model.",

author = "P. Abreu and Christopher Parkes and {DELPHI Collaboration}",

note = "Hardcopy at DESY",

year = "1998",

language = "English",

volume = "16",

pages = "371--405",

journal = "European Physical Journal C. Particles and Fields",

issn = "1434-6044",

publisher = "Springer Nature",

number = "3",

}

TY - JOUR

T1 - Cross-sections and leptonic forward backward asymmetries from the Z0 running of LEP

AU - Abreu, P.

AU - Parkes, Christopher

AU - DELPHI Collaboration

N1 - Hardcopy at DESY

PY - 1998

Y1 - 1998

N2 - During 1993 and 1995 LEP was run at 3 energies near the Z0 peak in order to give improved measurements of the mass and width of the resonance. During 1994, LEP operated only at the Z0 peak.In total DELPHI accumulated data corresponding to an integrated luminosity of approximately 116 pb−1.Analyses of the hadronic cross-sections and of the cross-sections and forward-backward asymmetries in the leptonic channels used the most precise evaluations of the LEP energies. In the dimuon channel, events with a photon radiated from the initial state have been used to probe the cross-sections and asymmetries down to PETRA energies. Model independent fits to all DELPHI lineshape and asymmetry data from1990 to 1995 have been carried out giving values of the resonance parameters:MZ = 91.1863 ± 0.0028 GeVΓZ = 2.4876 ± 0.0041 GeVσ0 = 41.578 ± 0.069 nbRl = 20.730 ± 0.060A0FB = 0.0187 ± 0.0019.These values are significantly more precise than those previously published. The results are interpreted interms of the Standard Model.

AB - During 1993 and 1995 LEP was run at 3 energies near the Z0 peak in order to give improved measurements of the mass and width of the resonance. During 1994, LEP operated only at the Z0 peak.In total DELPHI accumulated data corresponding to an integrated luminosity of approximately 116 pb−1.Analyses of the hadronic cross-sections and of the cross-sections and forward-backward asymmetries in the leptonic channels used the most precise evaluations of the LEP energies. In the dimuon channel, events with a photon radiated from the initial state have been used to probe the cross-sections and asymmetries down to PETRA energies. Model independent fits to all DELPHI lineshape and asymmetry data from1990 to 1995 have been carried out giving values of the resonance parameters:MZ = 91.1863 ± 0.0028 GeVΓZ = 2.4876 ± 0.0041 GeVσ0 = 41.578 ± 0.069 nbRl = 20.730 ± 0.060A0FB = 0.0187 ± 0.0019.These values are significantly more precise than those previously published. The results are interpreted interms of the Standard Model.

M3 - Article

SN - 1434-6044

VL - 16

SP - 371

EP - 405

JO - European Physical Journal C. Particles and Fields

JF - European Physical Journal C. Particles and Fields

IS - 3

ER -

Cross-sections and leptonic forward backward asymmetries from the Z0 running of LEP

Abstract

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