Observation of neutrino induced diffractive D-s*(+) production and subsequent decay D-s*(+)-> D-s(+)->tau(+)->mu(+)

Annis P., Aoki S., Artamonov A., Barbuto E., di Bartolomeo A., Bonekamper D., ...More

PHYSICS LETTERS B, vol.435, pp.458-464, 1998 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 435
  • Publication Date: 1998
  • Doi Number: 10.1016/s0370-2693(98)00914-9
  • Journal Name: PHYSICS LETTERS B
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.458-464
  • Middle East Technical University Affiliated: Yes

Abstract

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 D-s*(+) production followed by the decay chain D-s*(+) --> D-s(+) gamma, D-s(+) --> tau(+) v(tau),tau(+) --> mu(+) v(mu)v(tau). The event is characterised by small Q(2) 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. (C) 1998 Elsevier Science B.V. All rights reserved.