Skip to Main content Skip to Navigation
Journal articles

Measurement of $K^{0}_{\mu3}$ form factors

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-Dnszelmann D. Cundy G. d'Agostini N. Doble V. Falaleev L. Gatignon A. Gonidec B. Gorini G. Govi P. Grafstrm O W Kubischta A. Lacourt A. Norton S. Palestini B. Panzer-Steindel H. Taureg M. Velasco H. Wahl C. Cheshkov P. Z. Khristov V. Kekelidze L. Litov D. T. Madigozhin 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. Savrié A. Bizzeti M. Calvetti G. Collazuol G. Graziani E. Iacopini M. Lenti G. Ruggiero M. Veltri H. G. Becker K. Eppard M. Eppard H. Fox A. Kalter K. Kleinknecht U. Koch L. Köpke P. Lopes da Silva O P Marouelli I. Pellmann A. Peters B. Renk S. A. Schmidt V. Schönharting Yu Schué R. Wanke A. Winhart M. Wittgen J.C. Chollet 1 L. Fayard 1 L. Iconomidou-Fayard 1 J. Ocariz 1 G. Unal 1 Isabelle Wingerter-Seez 1 G. Anzivino P. Cenci E. Imbergamo P. Lubrano A. Mestvirishvili A. Nappi M. Pepé 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. Chèze 2 J. Cogan 2 M. de Beer 2 P. Debu 2 A. Formica 2 R. Granier de Cassagnac 2, 3 E. Mazzucato 2 B. Peyaud 2 R. Turlay 2 B. Vallage 2 R. Bernhard 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 : This paper reports on a new high precision measurement of the form factors of the K_{L}\to \pi^{\pm} \mu^{\mp} \nu_{\mu} decay. The data sample of about 2.3$\times 10^{6}$ events was recorded in 1999 by the NA48 experiment at CERN. Studying the Dalitz plot density we measured a linear, $\lambda^{'}_{+} = (20.5\pm 2.2_{stat} \pm 2.4_{syst})\times 10^{-3}$, and a quadratic, $\lambda^{''}_{+} = (2.6\pm 0.9_{stat} \pm 1.0_{syst})\times 10^{-3}$ term in the power expansion of the vector form factor. No evidence was found for a second order term for the scalar form factor; the linear slope was determined to be $\lambda_{0} = (9.5\pm 1.1_{stat} \pm 0.8_{syst})\times 10^{-3}$. Using a linear fit our results were: $\lambda_{+} = (26.7\pm 0.6_{stat} \pm 0.8_{syst} )\times 10^{-3}$ and, $\lambda_{0} = (11.7\pm 0.7_{stat} \pm 1.0_{syst})\times 10^{-3}$. A pole fit of the form factors yields: $m_V = (905 \pm 9_{stat} \pm 17_{syst})$ MeV/c$^2$ and $m_S = (1400 \pm 46_{stat} \pm 53_{syst})$ MeV/c$^2$.
Document type :
Journal articles
Complete list of metadata

http://hal.in2p3.fr/in2p3-00137631
Contributor : Dominique Girod <>
Submitted on : Tuesday, March 20, 2007 - 8:24:24 PM
Last modification on : Tuesday, December 22, 2020 - 12:26:05 PM

Links full text

Identifiers

Collections

Citation

A. Bevan, R. S. Dosanjh, T. J. Gershon, B. Hay, G. E. Kalmus, et al.. Measurement of $K^{0}_{\mu3}$ form factors. Physics Letters B, Elsevier, 2007, 647, pp.341-350. ⟨10.1016/j.physletb.2007.02.039⟩. ⟨in2p3-00137631⟩

Share

Metrics

Record views

216