Search for KS(L)0 → π+ π- μ+ μ- decays at LHCb



Aaij, R, Abdelmotteleb, ASW, Beteta, C Abellan, Abudinen, F, Ackernley, T, Adefisoye, AA, Adeva, B, Adinolfi, M, Adlarson, P, Agapopoulou, C
et al (show 1176 more authors) (2026) Search for KS(L)0 → π+ π- μ+ μ- decays at LHCb PHYSICAL REVIEW D, 113 (7). 072001-. ISSN 2470-0010, 2470-0029

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Abstract

A search for K<sup>0</sup><inf>S</inf>ðL<inf>Þ</inf> → π<sup>þ</sup>π<sup>−</sup>μ<sup>þ</sup>μ<sup>−</sup> decays is performed using proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb<sup>−1</sup>. No K<sup>0</sup><inf>S</inf>ðL<inf>Þ</inf> → π<sup>þ</sup>π<sup>−</sup>μ<sup>þ</sup>μ<sup>−</sup> signals are found and upper limits are set for the first time on the branching fractions BðK<sup>0</sup><inf>S</inf> → π<sup>þ</sup>π<sup>−</sup>μ<sup>þ</sup>μ<sup>−</sup>Þ < 1.4 × 10<sup>−9</sup> and BðK<sup>0</sup><inf>L</inf> → π<sup>þ</sup>π<sup>−</sup>μ<sup>þ</sup>μ<sup>−</sup>Þ < 6.6 × 10<sup>−7</sup>, at the 90% confidence level.

Item Type: Article
Uncontrolled Keywords: 5107 Particle and High Energy Physics, 4902 Mathematical Physics, 49 Mathematical Sciences, 51 Physical Sciences, 5101 Astronomical Sciences
Divisions: Faculty of Humanities & Social Sciences
Faculty of Science & Engineering
Faculty of Science & Engineering > School of Physical Sciences
Faculty of Science & Engineering > School of Physical Sciences > Physics
Faculty of Humanities & Social Sciences > School of the Arts
Faculty of Humanities & Social Sciences > School of the Arts > Architecture
Depositing User: Symplectic Admin
Date Deposited: 27 Apr 2026 08:46
Last Modified: 23 May 2026 20:57
DOI: 10.1103/s1dv-cv1t
Open Access URL: https://journals.aps.org/prd/pdf/10.1103/s1dv-cv1t
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3198164
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