A measurement of the K+-> pi(+)mu(+)mu(-) decay

Gil, E Cortina, Kleimenova, A, Minucci, E, Padolski, S, Petrov, P, Shaikhiev, A, Volpe, R, Numao, T, Petrov, Y, Velghe, B
et al (show 199 more authors) (2022) A measurement of the K+-> pi(+)mu(+)mu(-) decay. JOURNAL OF HIGH ENERGY PHYSICS, 2022 (11). 11-.

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<jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>A sample of 2<jats:italic>.</jats:italic>8 × 10<jats:sup>4</jats:sup><jats:italic>K</jats:italic><jats:sup>+</jats:sup> → <jats:italic>π</jats:italic><jats:sup>+</jats:sup><jats:italic>μ</jats:italic><jats:sup>+</jats:sup><jats:italic>μ</jats:italic><jats:sup><jats:italic>−</jats:italic></jats:sup> candidates with negligible background was collected by the NA62 experiment at the CERN SPS in 2017–2018. The model-independent branching fraction is measured to be (9<jats:italic>.</jats:italic>15 ± 0<jats:italic>.</jats:italic>08) × 10<jats:sup><jats:italic>−</jats:italic>8</jats:sup>, a factor three more precise than previous measurements. The decay form factor is presented as a function of the squared dimuon mass. A measurement of the form factor parameters and their uncertainties is performed using a description based on Chiral Perturbation Theory at <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \mathcal{O} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>O</mml:mi> </mml:math></jats:alternatives></jats:inline-formula>(<jats:italic>p</jats:italic><jats:sup>6</jats:sup>).</jats:p>

Item Type: Article
Uncontrolled Keywords: Branching fraction, Fixed Target Experiments, Flavour Changing Neutral Currents, Rare Decay
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 04 May 2023 10:46
Last Modified: 14 Mar 2024 22:50
DOI: 10.1007/JHEP11(2022)011
Open Access URL: https://doi.org/10.1007/JHEP11(2022)011
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3170160