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• W4387259536 abstract "A bstract This paper reports the first ATLAS measurement of the $$ {B}_s^0 $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msubsup> <mml:mi>B</mml:mi> <mml:mi>s</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math> → μμ effective lifetime. The measurement is based on the data collected in 2015–2016, amounting to 26.3 fb − 1 of 13 TeV LHC proton-proton collisions. The proper decay-time distribution of 58 ± 13 background-subtracted signal candidates is fit with simulated signal templates parameterised as a function of the $$ {B}_s^0 $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msubsup> <mml:mi>B</mml:mi> <mml:mi>s</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math> effective lifetime, with statistical uncertainties extracted through a Neyman construction. The resulting effective measurement of the $$ {B}_s^0 $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msubsup> <mml:mi>B</mml:mi> <mml:mi>s</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math> → μμ lifetime is $$ {0.99}_{-0.07}^{+0.42} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msubsup> <mml:mn>0.99</mml:mn> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>0.07</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> <mml:mn>0.42</mml:mn> </mml:mrow> </mml:msubsup> </mml:math> (stat.) ± 0 . 17 (syst.) ps and it is found to be consistent with the Standard Model." @default.
• W4387259536 created "2023-10-03" @default.
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