Test of lepton flavour universality in K%2b→ℓ%2bν decays Article

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Overview

abstract

• A precision test of lepton flavour universality has been performed by measuring the ratio RK of kaon leptonic decay rates K%2b→e%2bν and K%2b→μ%2bνin a sample of 59813 reconstructed K%2b→ℓ%2bν candidates with (8.71±0.24)%25 background contamination. The result RK=(2.487±0.013)×10-5 is in agreement with the Standard Model expectation. © 2011 Elsevier B.V.

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.
• Coward D.
• D'Agostini G.
• Dalpiaz P.
• Danielsson H.
• Dellacasa G.
• Di Filippo D.
• DiLella L.
• Doble N.
• Duk V.
• Dyulendarova M.
• Engelfried Jatzkowski Jurgen
• Eppard K.
• Falaleev V.
• Fantechi R.
• Fiorini M.
• Frabetti P.L.
• Fucci A.
• Gallorini S.
• Gatignon L.
• Gianoli A.
• Giudici S.
• Goudzovski E.
• Gushchin E.
• Hallgren B.
• Hita-Hochgesand M.
• Iacopini E.
• Imbergamo E.
• Kekelidze V.
• Kleinknecht K.
• Kozhuharov V.
• Kurshetsov V.F.
• Lamanna G.
• Lazzeroni C.
• Lenti M.
• Leonardi E.
• Litov L.
• Lopez S.G.
• Madigozhin D.
• Maier A.
• Mannelli I.
• Marchetto F.
• Marinova E.
• Massarotti P.
• 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.
• Popov I.
• Potrebenikov Y.
• Raggi M.
• Ramusino A.C.
• 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

• 2011-01-01

funding provided via

• Science and Technology Facilities Council, STFC: PP/F000731/1  Grant

published in

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

Research

keywords

• Lepton universality; Leptonic kaon decay

Identity

Digital Object Identifier (DOI)

• 10.1016/j.physletb.2011.02.064

Additional Document Info

start page

• 105

end page

• 114

volume

• 698

issue

• 2