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Measurement of the Radiative Ke3 Branching Ratio

A. Lai D. Marras A. Bevan R.S. Dosanjh T.J. Gershon B. Hay G.E. Kalmus C. Lazzeroni D.J. Munday E. Olaiya M.A. Parker T.O. White S.A. Wotton G. Barr G. Bocquet A. Ceccucci T. Cuhadar-Donszelmann D. Cundy G. d'Agostini N. Doble V. Falaleev L. Gatignon A. Gonidec B. Gorini G. Govi P. Grafstrom W. Kubischta A. Lacourt A. Norton S. Palestini B. Panzer-Steindel H. Taureg M. Velasco H. Wahl C. Cheshkov P. Hristov V. Kekelidze L. Litov D. Madigojine N. Molokanova Yu. Potrebenikov S. Stoynev A. Zinchenko I. Knowles V. Martin R. Sacco A. Walker M. Contalbrigo P. Dalpiaz J. Duclos P.L. Frabetti A. Gianoli M. Martini F. Petrucci M. Savrie A. Bizzeti M. Calvetti G. Collazuol G. Graziani E. Iacopini M. Lenti F. Martelli M. Veltri H.G. Becker K. Eppard M. Eppard H. Fox A. Kalter K. Kleinknecht U. Koch L. Kopke P. Lopes da Silva P. Marouelli I. Pellmann A. Peters B. Renk S.A. Schmidt V. Schonharting Y. Schue R. Wanke A. Winhart M. Wittgen J.C. Chollet 1 L. Fayard 1 L. Iconomidou-Fayard 1 J. Ocariz 1 G. Unal 1 I. Wingerter-Seez 1 G. Anzivino P. Cenci E. Imbergamo P. Lubrano A. Mestvirishvili A. Nappi M. Pepe M. Piccini L. Bertanza R. Carosi R. Casali C. Cerri M. Cirilli F. Costantini R. Fantechi S. Giudici I. Mannelli G. Pierazzini M. Sozzi J.B. Cheze J. Cogan M. de Beer P. Debu A. Formica R. Granier de Cassagnac E. Mazzucato B. Peyaud R. Turlay B. Vallage M. Holder A. Maier M. Ziolkowski R. Arcidiacono C. Biino N. Cartiglia F. Marchetto E. Menichetti N. Pastrone J. Nassalski E. Rondio M. Szleper W. Wislicki S. Wronka H. Dibon G. Fischer M. Jeitler M. Markytan I. Mikulec G. Neuhofer M. Pernicka A. Taurok L. Widhalm
Abstract : We present a measurement of the relative branching ratio of the decay KL -> pi e nu gamma (Ke3gamma) with respect to KL-> pi e nu (gamma) (Ke3+Ke3gamma) decay. The result is based on observation of 19 000 Ke3gamma and 5.6 x 10^6 Ke3 decays. The value of the branching ratio is Br(Ke3gamma, Egamma^*>30 MeV,theta(e,gamma)^*>20^o)/Br(Ke3)= (0.964+-0.008+0.011-0.009)%. This result agrees with theoretical predictions but is at variance with a recently published result.
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Submitted on : Friday, February 11, 2005 - 4:22:07 PM
Last modification on : Tuesday, December 22, 2020 - 12:26:05 PM

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A. Lai, D. Marras, A. Bevan, R.S. Dosanjh, T.J. Gershon, et al.. Measurement of the Radiative Ke3 Branching Ratio. Physics Letters B, Elsevier, 2005, 605, pp.247-255. ⟨10.1016/j.physletb.2004.11.056⟩. ⟨in2p3-00023745⟩

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