New measurement of the K+ ? p+µ+µ-decay at NA62

The NA62 Collaboration

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

1 Citation (Scopus)


A preliminary result of a new measurement of the K+ ?p+µ+µ- form factor parameters and branching fraction using the NA62 Run 1 data set collected in the years 2016 - 2018 is presented. From the observed sample of 28011 K+ ? p+µ+µ- event candidates with negligible background contamination, the form factor parameters a+ = -0.592 ± 0.013stat ± 0.007syst ± 0.001ext and b+ = -0.699 ± 0.046stat ± 0.035syst ± 0.003ext, and the branching fraction B(K+ ? p+µ+µ-) = (9.27 ± 0.07stat ± 0.08syst ± 0.04ext) × 10-8 are obtained.

Original languageEnglish
Title of host publicationProceedings of Science
Publication statusPublished - 15 Apr 2021
Event40th International Conference on High Energy Physics, ICHEP 2020 - Virtual, Prague, Czech Republic
Duration: 28 Jul 20206 Aug 2020

Publication series

NameProceedings of Science
ISSN (Print)1824-8039


Conference40th International Conference on High Energy Physics, ICHEP 2020
Country/TerritoryCzech Republic
CityVirtual, Prague

Bibliographical note

Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).


Dive into the research topics of 'New measurement of the K+ ? p+µ+µ-decay at NA62'. Together they form a unique fingerprint.

Cite this