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PUBDB-2015-05508

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Chiral Perturbation Theory tests at NA48 and NA62-$\mathbf{R_K}$ experiments at CERN

Costantini, F. (Corresponding author) ; NA48/2 Collaboration (Collaboration author) ; NA62-RK Collaboration (Collaboration author)

2014
Deutsches Elektronen-Synchrotron, DESY Hamburg

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Please use a persistent id in citations: doi:10.3204/DESY-PROC-2014-04/16  doi:10.3204/DESY-PROC-2014-04/16

Report No.: DESY-PROC-2014-04

Abstract: Final results from an analysis of about 400 $K^\pm\to\pi^\pm\gamma\gamma$ rare decay candidates collected by the NA48/2 and NA62-$R_K$ experiments at CERN during low intensity runs with minimum bias trigger configurations are presented. The results include a model-independent decay rate measurement and fits to Chiral Perturbation Theory (ChPT) description. The data support the ChPT prediction for a cusp in the di-photon invariant mass spectrum at the two pion threshold.

Keyword(s): talk: Hamburg 2014/08/24 ; perturbation theory: chiral ; threshold: two-pion ; CERN Lab ; NA48 ; NA62 ; mass spectrum ; decay rate ; mass spectrum: two-photon ; K: rare decay ; K: radiative decay ; trigger ; experimental results ; K+ --> pi+ 2photon ; K- --> pi- 2photon

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Contributing Institute(s):

1. LHC/ATLAS Experiment (ATLAS)
2. LHC/CMS Experiment (CMS)
3. Uni Hamburg / Experimentalphysik (UNI/EXP)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)

Experiment(s):

1. No specific instrument

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Database coverage:

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Book/Proceedings/Internal Report Schmidt, A. (Editor)>Extern* ; Sander, C. (Editor)DESY*
Proceedings, 20th International Conference on Particles and Nuclei (PANIC 14)
2014Panic2014, Panic2014, HamburgHamburg, Germany, 25 Aug 2014 - 29 Aug 20142014-08-252014-08-29 Hamburg : Deutsches Elektronen-Synchrotron, DESY 1-754 (2014) [10.3204/DESY-PROC-2014-04]2014     Files  Fulltext BibTeX | EndNote: XML, Text | RIS

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