Flavor tagged time-dependent angular analysis of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi>B</mml:mi><mml:mi>s</mml:mi><mml:mn>0</mml:mn></mml:msubsup><mml:mo stretchy="false">→</mml:mo><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi><mml:mi>ϕ</mml:mi></mml:math>decay and extraction of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">Δ</mml:mi><mml:msub><mml:mi mathvariant="normal">Γ</mml:mi><mml:mi>s</mml:mi></mml:msub></mml:math>and the weak phase<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>ϕ</mml:mi><mml:mi>s</mml:mi></mml:msub></mml:math>in ATLAS

A measurement of the ${B}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\phi}$ decay parameters, updated to include flavor tagging is reported using $4.9\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of integrated luminosity collected by the ATLAS detector from $\sqrt{s}=7\text{ }\text{ }\mathrm{TeV}$ $pp$ collisions recorded in 2011 at the LHC. The values measured for the physical parameters are ${\ensuremath{\phi}}_{s}=0.12\ifmmode\pm\else\textpm\fi{}0.25(\text{stat})\ifmmode\pm\else\textpm\fi{}0.05(\text{syst})\text{ }\text{ }\text{rad}\phantom{\rule{0ex}{0ex}}\mathrm{\ensuremath{\Delta}}{\mathrm{\ensuremath{\Gamma}}}_{s}=0.053\ifmmode\pm\else\textpm\fi{}0.021(\text{stat})\ifmmode\pm\else\textpm\fi{}0.010(\text{syst})\text{ }\text{ }{\mathrm{ps}}^{\ensuremath{-}1}\phantom{\rule{0ex}{0ex}}{\mathrm{\ensuremath{\Gamma}}}_{s}=0.677\ifmmode\pm\else\textpm\fi{}0.007(\text{stat})\ifmmode\pm\else\textpm\fi{}0.004(\text{syst})\text{ }\text{ }{\mathrm{ps}}^{\ensuremath{-}1}\phantom{\rule{0ex}{0ex}}|{A}_{\ensuremath{\parallel}}(0){|}^{2}=0.220\ifmmode\pm\else\textpm\fi{}0.008(\text{stat})\ifmmode\pm\else\textpm\fi{}0.009(\text{syst})\phantom{\rule{0ex}{0ex}}|{A}_{0}(0){|}^{2}=0.529\ifmmode\pm\else\textpm\fi{}0.006(\text{stat})\ifmmode\pm\else\textpm\fi{}0.012(\text{syst})\phantom{\rule{0ex}{0ex}}{\ensuremath{\delta}}_{\ensuremath{\perp}}=3.89\ifmmode\pm\else\textpm\fi{}0.47(\text{stat})\ifmmode\pm\else\textpm\fi{}0.11(\text{syst})\text{ }\text{ }\text{rad}$where the parameter $\mathrm{\ensuremath{\Delta}}{\mathrm{\ensuremath{\Gamma}}}_{s}$ is constrained to be positive. The $S$-wave contribution was measured and found to be compatible with zero. Results for ${\ensuremath{\phi}}_{s}$ and $\mathrm{\ensuremath{\Delta}}{\mathrm{\ensuremath{\Gamma}}}_{s}$ are also presented as 68% and 95% likelihood contours, which show agreement with the Standard Model expectations.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.