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<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>−</mml:mo><mml:msubsup><mml:mover accent="true"><mml:mi>B</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:mi>s</mml:mi><mml:mn>0</mml:mn></mml:msubsup></mml:math>mixing and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>b</mml:mi><mml:mo>→</mml:mo><mml:mi>s</mml:mi></mml:math>transitions in an isosinglet …
The recent observation of the mass difference in the ${B}_{s}$ system seems to be not in complete agreement with the corresponding standard model value. We consider the model with an extra vectorlike down quark to explain this discrepancy and obtain the constraints on the new physics parameters. Thereafter, we show …