Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Tests of the Standard Model and constraints on new physics from measurements of fermion-pair production at 183 GeV at LEP
AU - Kartvelishvili, Vakhtang
AU - OPAL Collaboration
PY - 1999/1
Y1 - 1999/1
N2 - Cross-sections for hadronic, bb¯bb¯ and lepton pair final states in e+e−e+e− collisions at s√s =183 GeV, measured with the OPAL detector at LEP, are presented and compared with the predictions of the Standard Model. Forward-backward asymmetries for the leptonic final states have also been measured. Cross-sections and asymmetries are also presented for data recorded in 1997 at s√s =130 and 136 GeV. The results are used to measure the energy dependence of the electromagnetic coupling constant αemαem , and to place limits on new physics as described by four-fermion contact interactions or by the exchange of a new heavy particle such as a leptoquark, or of a squark or sneutrino in supersymmetric theories with R-parity violation.
AB - Cross-sections for hadronic, bb¯bb¯ and lepton pair final states in e+e−e+e− collisions at s√s =183 GeV, measured with the OPAL detector at LEP, are presented and compared with the predictions of the Standard Model. Forward-backward asymmetries for the leptonic final states have also been measured. Cross-sections and asymmetries are also presented for data recorded in 1997 at s√s =130 and 136 GeV. The results are used to measure the energy dependence of the electromagnetic coupling constant αemαem , and to place limits on new physics as described by four-fermion contact interactions or by the exchange of a new heavy particle such as a leptoquark, or of a squark or sneutrino in supersymmetric theories with R-parity violation.
U2 - 10.1007/s100529801027
DO - 10.1007/s100529801027
M3 - Journal article
VL - 6
SP - 1
EP - 18
JO - European Physical Journal C: Particles and Fields
JF - European Physical Journal C: Particles and Fields
SN - 1434-6044
IS - 1
ER -