Abstract
This note includes a measurement of the Bos decay parameters in the Bs→J/ψϕ channel and a measurement of the B0 meson proper decay time and decay width using the statistics collected by the ATLAS experiment in Run I of the LHC. The first result presents the measurement of the CP -violating phase ϕs, the decay width Γs and the width difference between the mass eigenstates ΔΓs. The second result presents the measurement of the width difference ΔΓd, which is extracted from the measurement of the lifetime dependence of B0→J/ψKs and B0→J/ψK*° decays. The obtained results are ϕs = 0.098 ± 0.084(stat.) ± 0.040(syst.) rad. and ΔΓd/Γd = (-0.1 ± 1.1(stat.) ± 0.9(syst.)) × 10-2.
Highlights
ATLAS [1] is a general purpose detector that measures heavy flavour properties using its inner dectectors, muon spectrometers and electromagnetic calorimeters
This note presents a√n overview of recent results obtained using data collected at s = 7 TeV during 2011 and s = 8 TeV during 2012
The parameters AdCiPr, A∆Γ and AmCPix are theoretically well defined for flavour-specific final states and CP eigenstates [3]
Summary
ATLAS [1] is a general purpose detector that measures heavy flavour properties using its inner dectectors, muon spectrometers and electromagnetic calorimeters (for tagging). T is the proper decay time of the Bq0 meson. The parameters AdCiPr , A∆Γ and AmCPix are theoretically well defined for flavour-specific final states and CP eigenstates [3].
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