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Measurement of the forward - backward asymmetry in Z ---> b anti-b and Z ---> c anti-c

The ALEPH collaboration
Phys.Lett. B263 (1991) 325-336, 1991

Abstract (data abstract)
CERN-LEP. ALEPH Collaboration. Measurement of the forward- backward asymmetry in Z --& gt; bbbar and Z --& gt; ccbar decays. Two methods are employed to select the quark asymmetries. The first uses high pt leptons to enrich the sample with b decays and the second fits the full pt range allowing both the b and c asymmetries to be measured.. These asymmetries correspond to the value of effective electroweak mixing angle, SIN2TW = 0.2262 +- 0.0053.

  • Table 1

    Data from P 10(C=PREPRINT)


    b asymmetry from high pt leptons.

  • Table 2

    Data from P 17(C=PREPRINT)


    b asymmetry from full pt range.

  • Table 3

    Data from P 17(C=PREPRINT)


    b asymmetry from full pt range.

  • Table 4

    Data from P 18(C=PREPRINT)


    sin2tw measured from combined asymmetries.

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