Study of the K ±→π ±γγ decay by the NA62 experiment Article

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Overview

abstract

• A study of the dynamics of the rare decay K ±→π ±γγ has been performed on a sample of 232 decay candidates, with an estimated background of 17.4 ± 1.1 events, collected by the NA62 experiment at CERN in 2007. The results are combined with those from a measurement conducted by the NA48/2 Collaboration at CERN. The combined model-independent branching ratio in the kinematic range z=(mγγ/mK)2>0.2 is BMI(z>0.2)=(0.965±0.063)×10-6, and the combined branching ratio in the full kinematic range assuming a Chiral Perturbation Theory description is B(Kπγγ)=(1.003±0.056)×10-6. A detailed comparison of the results with the previous measurements is performed. © 2014 The Authors.

authors

• Ambrosino F.
• Antonelli A.
• Anzivino G.
• Arcidiacono R.
• Baldini W.
• Balev S.
• Bifani S.
• Biino C.
• Bizzeti A.
• Bloch-Devaux B.
• Bolotov V.
• Bucci F.
• Ceccucci A.
• Cenci P.
• Cerri C.
• Collazuol G.
• Costantini F.
• Cotta Ramusino A.
• Coward D.
• D'Agostini G.
• Dalpiaz P.
• Danielsson H.
• Dellacasa G.
• Di Filippo D.
• DiLella L.
• Doble N.
• Duk V.
• Engelfried Jatzkowski Jurgen
• Eppard K.
• Falaleev V.
• Fantechi R.
• Fiorini M.
• Frabetti P.L.
• Fucci A.
• Gallorini S.
• Gatignon L.
• Gersabeck E.
• Gianoli A.
• Giudici S.
• Goudzovski E.
• Goy Lopez S.
• Gushchin E.
• Hallgren B.
• Hita-Hochgesand M.
• Iacopini E.
• Imbergamo E.
• Kekelidze V.
• Kholodenko S.
• Kleinknecht K.
• Kozhuharov V.
• Kurshetsov V.F.
• Lamanna G.
• Lazzeroni C.
• Lenti M.
• Leonardi E.
• Litov L.
• Madigozhin D.
• Maier A.
• Mannelli I.
• Marchetto F.
• Massarotti P.
• Misheva M.
• Molokanova N.
• Moulson M.
• Movchan S.
• Napolitano M.
• Norton A.
• Numao T.
• Obraztsov V.
• Palladino V.
• Pepe M.
• Peters A.
• Petrucci F.
• Peyaud B.
• Piandani R.
• Piccini M.
• Pierazzini G.
• Potrebenikov Y.
• Raggi M.
• Renk B.
• Retière F.
• Riedler P.
• Romano A.
• Rubin P.
• Ruggiero G.
• Salamon A.
• Saracino G.
• Savrié M.
• Semenov V.
• Sergi A.
• Serra M.
• Shkarovskiy S.
• Sozzi M.
• Spadaro T.
• Valente P.
• Veltri M.
• Venditti S.
• Wahl H.
• Wanke R.
• Winhart A.
• Winston R.
• Yushchenko O.
• Zinchenko A.

publication date

• 2014-01-01

funding provided via

• National Science Foundation, NSF: 0338597, 1205940  Grant
• Science and Technology Facilities Council, STFC: PP/F000731/1, ST/J00412X/1, ST/K004042/1  Grant

published in

• Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics  Journal

Identity

Digital Object Identifier (DOI)

• 10.1016/j.physletb.2014.03.016

Additional Document Info

start page

• 65

end page

• 74

volume

• 732