Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Time-dependent angular analysis of the decay Bs -> J/psi phi and
  extraction of Delta Gamma_s and the CP-violating weak phase phi_s by ATLAS   A measurement of Bs J/psi phi decay parameters, including the CP-violating
weak phase phi_s and the decay width difference Delta Gamma_s is reported,
using 4.9 fb-1 of integrated luminosity collected in 2011 by the ATLAS detector
from LHC pp collisions at a centre- of-mass energy sqrt(s) = 7 TeV. The mean
decay width Gamma_s and the transversity amplitudes |A0(0)|^2 and |A||(0)|^2
are also measured. The values reported for these parameters are: phi_s = 0.22
\pm 0.41 (stat.) \pm 0.10 (syst.) rad Delta Gamma_s = 0.053 \pm 0.021 (stat.)
\pm 0.010 (syst.) ps-1
  Gamma_s = 0.677 \pm 0.007 (stat.) \pm 0.004 (syst.) ps-1
  |A0(0)|^2 = 0.528 \pm 0.006 (stat.) \pm 0.009 (syst.)
  |A||(0)|^2 = 0.220 \pm 0.008 (stat.) \pm 0.007 (syst.) where the values
quoted for phi_s and Delta Gamma_s correspond to the solution compatible with
the external measurements to which the strong phase delta perpendicular is
constrained and where Delta Gamma_s is constrained to be positive. The fraction
of S-wave KK or f0 contamination through the decays Bs -> J/psi K+K-(f0) is
measured as well and is found to be consistent with zero. Results for phi_s and
Delta Gamma_s are also presented as 68%, 90% and 95% likelihood contours, which
show agreement with Standard Model expectations.

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The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
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The categories of this paper are: stat
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The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
3
The categories of this paper are: physics
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The categories of this paper are: chem-ph
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The categories of this paper are: econ
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The categories of this paper are: funct-an
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: math
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The categories of this paper are: supr-con
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The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas