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.

New measurement of the K+ ? p+µ+µ-decay at NA62 / Bician, L., Aliberti, R., Ambrosino, F., Ammendola, R., Angelucci, B., Antonelli, A., Anzivino, G., Arcidiacono, R., Bache, T., Baeva, A., Baigarashev, D., Barbanera, M., Bernhard, J., Biagioni, A., Biino, C., Bizzeti, A., Blazek, T., Bloch-Devaux, B., Bonaiuto, V., Boretto, M., et al.. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - 390:(2021). (40th International Conference on High Energy Physics, ICHEP 2020 cze 2020).

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

Ambrosino F.;Brunetti M. B.;Capussela T.;Corvino M.;Di Filippo D.;Massarotti P.;Mirra M.;Napolitano M.;Saracino G.;
2021

Abstract

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.
2021
New measurement of the K+ ? p+µ+µ-decay at NA62 / Bician, L., Aliberti, R., Ambrosino, F., Ammendola, R., Angelucci, B., Antonelli, A., Anzivino, G., Arcidiacono, R., Bache, T., Baeva, A., Baigarashev, D., Barbanera, M., Bernhard, J., Biagioni, A., Biino, C., Bizzeti, A., Blazek, T., Bloch-Devaux, B., Bonaiuto, V., Boretto, M., et al.. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - 390:(2021). (40th International Conference on High Energy Physics, ICHEP 2020 cze 2020).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/986497
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