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A measurement of ∆Γs

Published version
Peer-reviewed

Repository DOI


Change log

Authors

Aaij, R 
Abdelmotteleb, ASW 
Abellan Beteta, C 
Abudinén, F 
Ackernley, T 

Abstract

jats:titleAjats:scbstract</jats:sc> </jats:title>jats:pUsing a dataset corresponding to 9 fbjats:supjats:italic−</jats:italic>1</jats:sup> of integrated luminosity collected with the LHCb detector between 2011 and 2018 in proton-proton collisions, the decay-time distributions of the decay modes jats:inline-formulajats:alternativesjats:tex-math$$ {B}_s^0\to J/{\psi \eta}^{\prime } $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:msubsup mml:miB</mml:mi> mml:mis</mml:mi> mml:mn0</mml:mn> </mml:msubsup> mml:mo→</mml:mo> mml:miJ</mml:mi> mml:mo/</mml:mo> mml:msup mml:miψη</mml:mi> mml:mo′</mml:mo> </mml:msup> </mml:math></jats:alternatives></jats:inline-formula> and jats:inline-formulajats:alternativesjats:tex-math$$ {B}_s^0\to J/\psi {\pi}^{+}{\pi}^{-} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:msubsup mml:miB</mml:mi> mml:mis</mml:mi> mml:mn0</mml:mn> </mml:msubsup> mml:mo→</mml:mo> mml:miJ</mml:mi> mml:mo/</mml:mo> mml:miψ</mml:mi> mml:msup mml:miπ</mml:mi> mml:mo+</mml:mo> </mml:msup> mml:msup mml:miπ</mml:mi> mml:mo−</mml:mo> </mml:msup> </mml:math></jats:alternatives></jats:inline-formula> are studied. The decay-width difference between the light and heavy mass eigenstates of the jats:inline-formulajats:alternativesjats:tex-math$$ {B}_s^0 $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> mml:msubsup mml:miB</mml:mi> mml:mis</mml:mi> mml:mn0</mml:mn> </mml:msubsup> </mml:math></jats:alternatives></jats:inline-formula> meson is measured to be ∆Γjats:subjats:italics</jats:italic></jats:sub> = 0jats:italic.</jats:italic>087 ± 0jats:italic.</jats:italic>012 ± 0jats:italic.</jats:italic>009 psjats:supjats:italic−</jats:italic>1</jats:sup>, where the first uncertainty is statistical and the second systematic.</jats:p>

Description

Keywords

5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 4902 Mathematical Physics, 49 Mathematical Sciences, 51 Physical Sciences

Journal Title

Journal of High Energy Physics

Conference Name

Journal ISSN

1126-6708
1029-8479

Volume Title

2024

Publisher

Springer Science and Business Media LLC