De Bonis, I.
MIXING-PARAM
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Measurement of the b forward-backward asymmetry and mixing using high-p(T) leptons.

The ALEPH collaboration Buskulic, D. ; De Bonis, I. ; Decamp, D. ; et al.
Phys.Lett.B 384 (1996) 96009264 414-426, 1996.
Inspire Record 419905 DOI 10.17182/hepdata.47806

The B0 - B̄0 average mixing parameter χ and b forward-backward asymmetry AFB0(b) are measured from a sample of about 4 200 000 Z → qq̄ events recorded with the ALEPH detector at LEP in the years 1990–1995. High transverse momentum electrons and muons produced in b semileptonic decays provide the tag of the quark flavour and of its charge. The average mixing parameter and the pole b asymmetry are measured to be χ = 0.1246 ± 0.0051stat ± 0.0052syst, AFB0(b) = 0.1008 ± 0.0043stat ± 0.0028syst. The value of sin2θweff = 0.23198 ± 0.00092 is extracted from the asymmetry measurement.

2 data tables
Table 1

ASYM(N=FB,C=OBSERVED) is observed asymmetry including BQ, CQ and backround.

Table 2

No description provided.


Measurement of the heavy quark forward - backward asymmetries and average B mixing using leptons in multi - hadronic events

The OPAL collaboration Alexander, G. ; Allison, John ; Altekamp, N. ; et al.
Z.Phys.C 70 (1996) 357-370, 1996.
Inspire Record 404106 DOI 10.17182/hepdata.48046

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Measurement of b anti-b correlations at the CERN p anti-p collider

The UA1 collaboration Albajar, C. ; Ankoviak, K. ; Bartha, S. ; et al.
Z.Phys.C 61 (1994) 41-52, 1994.
Inspire Record 359461 DOI 10.17182/hepdata.14368

We report on measurements of correlated\(b\bar b\) production in\(p\bar p\) collisions at\(\sqrt s = 630GeV\), using dimuon data to tag both theb and\(\bar b\) quarks. Starting from an inclusive dimuon sample we obtain improved cross-sections for single inclusive beauty production and confirm our earlier results on\(B^0 - \bar B^0\) mixing. From a study of\(b\bar b\) correlations we derive explicit cross-sections for semi-differential\(b\bar b\) production. We compare the measured cross-sections and correlations to\(\mathcal{O}\left( {\alpha _s^3 } \right)\) QCD predictions and find good quantitative agreement. From the measured angular distributions we establish a size-able contribution from higher order QCD processes with a significance of about seven standard deviations. A large nonperturbative contribution to these higher order corrections is excluded.

17 data tables
Table 1

The first error is PT-dependent, and the second is PT-independent. Dimuons from different b-quarks.

Table 2

The first error is PT-dependent, and the second is PT-independent. Dimuons from b chain decays (b --> c + mu, c --> mu).

Table 3

Total cross-section for single b-quark production in the restricted rapidity range.

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