Research output: Contribution to Journal/Magazine › Journal article › peer-review
Measurement of A**b(FB) using inclusive b hadron decays. / ALEPH Collaboration, The; Heister, A.; Bouhova-Thacker, Evelina et al.
In: European Physical Journal C: Particles and Fields, Vol. 22, No. 2, 11.2001, p. 201-215.Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Measurement of A**b(FB) using inclusive b hadron decays
AU - ALEPH Collaboration, The
AU - Heister, A.
AU - Bouhova-Thacker, Evelina
AU - Bowdery, Christopher
AU - Finch, Alexander
AU - Foster, Frank
AU - Hughes, Gareth
AU - Jones, Roger
PY - 2001/11
Y1 - 2001/11
N2 - Based on a sample of four million events collected by ALEPH from 1991 to 1995, a measurement of the forward-backward asymmetry in Z→bb¯ decays using inclusive final states is presented. High-performance tagging of bb¯ events in a wide angular range is achieved using neural network techniques. An optimal hemisphere charge estimator is built by merging primary and secondary vertex information, leading kaon identification and jet charge in a neural network. The average charge asymmetry, the flavour tagging efficiencies and mean b-hemisphere charges are measured from data and used to extract the pole b asymmetry in the Standard ModelA0,bFB=0.1011±0.0027(stat)±0.0012(syst),corresponding to a value of the effective weak mixing angle ofsin2θeffW=0.23189±0.00056.
AB - Based on a sample of four million events collected by ALEPH from 1991 to 1995, a measurement of the forward-backward asymmetry in Z→bb¯ decays using inclusive final states is presented. High-performance tagging of bb¯ events in a wide angular range is achieved using neural network techniques. An optimal hemisphere charge estimator is built by merging primary and secondary vertex information, leading kaon identification and jet charge in a neural network. The average charge asymmetry, the flavour tagging efficiencies and mean b-hemisphere charges are measured from data and used to extract the pole b asymmetry in the Standard ModelA0,bFB=0.1011±0.0027(stat)±0.0012(syst),corresponding to a value of the effective weak mixing angle ofsin2θeffW=0.23189±0.00056.
U2 - 10.1007/s100520100812
DO - 10.1007/s100520100812
M3 - Journal article
VL - 22
SP - 201
EP - 215
JO - European Physical Journal C: Particles and Fields
JF - European Physical Journal C: Particles and Fields
SN - 1434-6044
IS - 2
ER -