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 - Measurement of |Vub| using b hadron semileptonic decay
AU - Bailey, Ian Richard
AU - Kartvelishvili, Vakhtang
AU - OPAL Collaboration
PY - 2001/7
Y1 - 2001/7
N2 - The magnitude of the CKM matrix element |Vub| is determined by measuring the inclusive charmless semileptonic branching fraction of beauty hadrons at OPAL based on b→Xuℓν event topology and kinematics. This analysis uses OPAL data collected between 1991 and 1995, which correspond to about four million hadronic Z decays. We measure Br( b→Xuℓν) to be (1.63±0.53+0.55−0.62)×10−3. The first uncertainty is the statistical error and the second is the systematic error. From this analysis, |Vub| is determined to be:|Vub| = (4.00 ± 0.65(stat)+0.67−0.76(sys) ± 0.19(HQE)) × 10−3.The last error represents the theoretical uncertainties related to the extraction of |Vub| from Br( b→Xuℓν) using the Heavy Quark Expansion.
AB - The magnitude of the CKM matrix element |Vub| is determined by measuring the inclusive charmless semileptonic branching fraction of beauty hadrons at OPAL based on b→Xuℓν event topology and kinematics. This analysis uses OPAL data collected between 1991 and 1995, which correspond to about four million hadronic Z decays. We measure Br( b→Xuℓν) to be (1.63±0.53+0.55−0.62)×10−3. The first uncertainty is the statistical error and the second is the systematic error. From this analysis, |Vub| is determined to be:|Vub| = (4.00 ± 0.65(stat)+0.67−0.76(sys) ± 0.19(HQE)) × 10−3.The last error represents the theoretical uncertainties related to the extraction of |Vub| from Br( b→Xuℓν) using the Heavy Quark Expansion.
U2 - 10.1007/s100520100764
DO - 10.1007/s100520100764
M3 - Journal article
VL - 21
SP - 399
EP - 410
JO - European Physical Journal C: Particles and Fields
JF - European Physical Journal C: Particles and Fields
SN - 1434-6044
IS - 3
ER -