Analysis of $$ {\Lambda}_b^0 $$ → pK−μ+μ− decays



Aaij, R, Abdelmotteleb, ASW, Abellan Beteta, C, Abudinén, F, Ackernley, T ORCID: 0000-0002-5951-3498, Adefisoye, AA, Adeva, B, Adinolfi, M, Adlarson, P, Agapopoulou, C
et al (show 1130 more authors) (2024) Analysis of $$ {\Lambda}_b^0 $$ → pK−μ+μ− decays. Journal of High Energy Physics, 2024 (12). 147-. ISSN 1126-6708, 1029-8479

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title> <jats:p>The differential branching fraction and angular coefficients of <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ {\Lambda}_b^0 $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Λ</mml:mi> <mml:mi>b</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math> </jats:alternatives> </jats:inline-formula> → <jats:italic>pK</jats:italic> <jats:sup> <jats:italic>−</jats:italic> </jats:sup> <jats:italic>μ</jats:italic> <jats:sup>+</jats:sup> <jats:italic>μ</jats:italic> <jats:sup> <jats:italic>−</jats:italic> </jats:sup> decays are measured in bins of the dimuon mass squared and dihadron mass. The analysis is performed using a data set corresponding to 9 fb<jats:sup> <jats:italic>−</jats:italic>1</jats:sup> of integrated luminosity collected with the LHCb detector between 2011 and 2018. The data are consistent with receiving contributions from a mixture of Λ resonances with different spin-parity quantum numbers. The angular coefficients show a pattern of vector-axial vector interference that is a characteristic of the type of flavour-changing neutral-current transition relevant for these decays.</jats:p>

Item Type: Article
Uncontrolled Keywords: 4902 Mathematical Physics, 5107 Particle and High Energy Physics, 49 Mathematical Sciences, 51 Physical Sciences
Divisions: Faculty of Science and Engineering
Faculty of Science and Engineering > School of Engineering
Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 05 Jun 2025 07:13
Last Modified: 05 Jun 2025 07:13
DOI: 10.1007/jhep12(2024)147
Open Access URL: https://link.springer.com/content/pdf/10.1007/JHEP...
Related Websites:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3193084