First observation and study of the K±→ π0π0μ±ν decay

UNSPECIFIED (2024) First observation and study of the K±→ π0π0μ±ν decay. Journal of High Energy Physics, 2024 (3): 137. ISSN 1029-8479

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The NA48/2 experiment at CERN reports the first observation of the K± → π0π0μ±ν decay based on a sample of 2437 candidates with 15% background contamination collected in 2003–2004. The decay branching ratio in the kinematic region of the squared dilepton mass above 0.03 GeV2/c4 is measured to be (0.65 ± 0.03) × 10−6. The extrapolation to the full kinematic space, using a specific model, is found to be (3.45 ± 0.16) × 10−6, in agreement with chiral perturbation theory predictions.

Item Type:
Journal Article
Journal or Publication Title:
Journal of High Energy Physics
Uncontrolled Keywords:
?? nuclear and high energy physics ??
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Deposited On:
13 Jun 2024 08:50
Last Modified:
14 Jun 2024 02:45