Latest results on rare kaon decays from the NA48/2 experiment at CERN

The NA48/2 collaboration

Latest results on rare kaon decays from the NA48/2 experiment at CERN

The NA48/2 collaboration

Physics and Astronomy

Research output: Contribution to journal › Conference article › peer-review

Abstract

The NA48/2 experiment at CERN reports the first observation of the K^± ? p^±p⁰e⁺e^- decay from an exposure of 1.7×10¹¹ charged kaon decays recorded in 2003-2004. A sample of 4919 candidates with 4.9% background contamination allows the determination of the branching ratio in the full kinematic region. The study of the kinematic space shows evidence for a structure dependent contribution in agreement with predictions based on chiral perturbation theory. Several P- and CP-violating asymmetries are also evaluated. The most precise measurement of the charged kaon semi-leptonic form factors obtained by NA48/2 with 4.4 million Ke3 and 2.3 million Kµ3 events collected in 2004 will also be presented.

Original language	English (US)
Article number	413
Journal	Proceedings of Science
Volume	390
State	Published - Apr 15 2021
Event	40th International Conference on High Energy Physics, ICHEP 2020 - Virtual, Prague, Czech Republic Duration: Jul 28 2020 → Aug 6 2020

ASJC Scopus subject areas

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@article{d88fecc971144be29a38c8fcebc4e1af,

title = "Latest results on rare kaon decays from the NA48/2 experiment at CERN",

abstract = "The NA48/2 experiment at CERN reports the first observation of the K± ? p±p0e+e- decay from an exposure of 1.7×1011 charged kaon decays recorded in 2003-2004. A sample of 4919 candidates with 4.9% background contamination allows the determination of the branching ratio in the full kinematic region. The study of the kinematic space shows evidence for a structure dependent contribution in agreement with predictions based on chiral perturbation theory. Several P- and CP-violating asymmetries are also evaluated. The most precise measurement of the charged kaon semi-leptonic form factors obtained by NA48/2 with 4.4 million Ke3 and 2.3 million Kµ3 events collected in 2004 will also be presented.",

author = "{The NA48/2 collaboration} and M. Raggi and G. Anzivino and R. Arcidiacono and W. Baldini and S. Balev and Batley and M. Behler and S. Bifani and C. Biino and A. Bizzeti and B. Bloch-Devaux and G. Bocquet and N. Cabibbo and M. Calvetti and N. Cartiglia and A. Ceccucci and P. Cenci and C. Cerri and C. Cheshkov and Ch{\`e}ze, {J. B.} and M. Clemencic and G. Collazuol and F. Costantini and Ramusino, {A. Cotta} and D. Coward and D. Cundy and A. Dabrowski and P. Dalpiaz and C. Damiani and {de Beer}, M. and J. Derr{\'e} and H. Dibon and L. DiLella and N. Doble and K. Eppard and V. Falaleev and R. Fantechi and M. Fidecaro and L. Fiorini and M. Fiorini and Martin, {T. Fonseca} and Frabetti, {P. L.} and L. Gatignon and E. Gersabeck and A. Gianoli and S. Giudici and A. Gonidec and E. Goudzovski and Lopez, {S. Goy} and M. Velasco",

note = "Publisher Copyright: {\textcopyright} 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).; 40th International Conference on High Energy Physics, ICHEP 2020 ; Conference date: 28-07-2020 Through 06-08-2020",

year = "2021",

month = apr,

day = "15",

language = "English (US)",

volume = "390",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

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TY - JOUR

T1 - Latest results on rare kaon decays from the NA48/2 experiment at CERN

AU - The NA48/2 collaboration

AU - Raggi, M.

AU - Anzivino, G.

AU - Arcidiacono, R.

AU - Baldini, W.

AU - Balev, S.

AU - Batley,

AU - Behler, M.

AU - Bifani, S.

AU - Biino, C.

AU - Bizzeti, A.

AU - Bloch-Devaux, B.

AU - Bocquet, G.

AU - Cabibbo, N.

AU - Calvetti, M.

AU - Cartiglia, N.

AU - Ceccucci, A.

AU - Cenci, P.

AU - Cerri, C.

AU - Cheshkov, C.

AU - Chèze, J. B.

AU - Clemencic, M.

AU - Collazuol, G.

AU - Costantini, F.

AU - Ramusino, A. Cotta

AU - Coward, D.

AU - Cundy, D.

AU - Dabrowski, A.

AU - Dalpiaz, P.

AU - Damiani, C.

AU - de Beer, M.

AU - Derré, J.

AU - Dibon, H.

AU - DiLella, L.

AU - Doble, N.

AU - Eppard, K.

AU - Falaleev, V.

AU - Fantechi, R.

AU - Fidecaro, M.

AU - Fiorini, L.

AU - Fiorini, M.

AU - Martin, T. Fonseca

AU - Frabetti, P. L.

AU - Gatignon, L.

AU - Gersabeck, E.

AU - Gianoli, A.

AU - Giudici, S.

AU - Gonidec, A.

AU - Goudzovski, E.

AU - Lopez, S. Goy

AU - Velasco, M.

N1 - 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).

PY - 2021/4/15

Y1 - 2021/4/15

N2 - The NA48/2 experiment at CERN reports the first observation of the K± ? p±p0e+e- decay from an exposure of 1.7×1011 charged kaon decays recorded in 2003-2004. A sample of 4919 candidates with 4.9% background contamination allows the determination of the branching ratio in the full kinematic region. The study of the kinematic space shows evidence for a structure dependent contribution in agreement with predictions based on chiral perturbation theory. Several P- and CP-violating asymmetries are also evaluated. The most precise measurement of the charged kaon semi-leptonic form factors obtained by NA48/2 with 4.4 million Ke3 and 2.3 million Kµ3 events collected in 2004 will also be presented.

AB - The NA48/2 experiment at CERN reports the first observation of the K± ? p±p0e+e- decay from an exposure of 1.7×1011 charged kaon decays recorded in 2003-2004. A sample of 4919 candidates with 4.9% background contamination allows the determination of the branching ratio in the full kinematic region. The study of the kinematic space shows evidence for a structure dependent contribution in agreement with predictions based on chiral perturbation theory. Several P- and CP-violating asymmetries are also evaluated. The most precise measurement of the charged kaon semi-leptonic form factors obtained by NA48/2 with 4.4 million Ke3 and 2.3 million Kµ3 events collected in 2004 will also be presented.

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UR - http://www.scopus.com/inward/citedby.url?scp=85105435821&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:85105435821

SN - 1824-8039

VL - 390

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 413

T2 - 40th International Conference on High Energy Physics, ICHEP 2020

Y2 - 28 July 2020 through 6 August 2020

ER -

Latest results on rare kaon decays from the NA48/2 experiment at CERN

Abstract

ASJC Scopus subject areas

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