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Observation of neutrino induced diffractive Ds*+ production and subsequent decay Ds*+ → Ds+ → τ+ → μ+

par Annis, Patrio ;El-Aidi, R.;Vander Donckt, Muriel ;van de Vyver, Bart;Vilain, Pierre ;Wilquet, Gaston ; [et al.]
Référence Physics letters. Section B, 435, 3-4, page (458-464)
Publication Publié, 1998-09

Article révisé par les pairs

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Résumé :

We report on the first direct observation of a neutrino induced charged-current interaction with two subsequent decays of short-lived particles close to the interaction vertex. This rare double-kink signature in the CHORUS emulsion target is interpreted as a Ds*+ production followed by the decay chain Ds*+ → Ds+ γ, Ds+ → τ+ vτ, τ+ → μ+ vμ vτ̄. The event is characterised by small Q2 and small four-momentum transfer squared t to the target nucleon, which indicates a diffractive production mechanism. A complete analysis of the event is presented. © 1998 Elsevier Science B.V. All rights reserved.