In an experiment with 360 GeV/cπ− beam at the CERN SPS using the high resolution hydrogen bubble chamber LEBC and the European Hybrid Spectrometer, an event has been observed of the type π−p→D0D0 + 8 prongs. The fully reconstructed decay modes are D0→K−π+π0π0andD0→K+π+π−π− , with all six charged tracks being detected in the spectrometer and all four photons from the π0 decays detected in the lead glass gamma detection system. The D0 has momentum 119.0 ± 0.6 GeV/c, xF = 0.31, length 4.1 ± 0.1 mm and proper lifetime (2.1 ± 0.1) × 10−13 s. The D0 has momentum 78.5 ± 0.3 GeV/c, xF = 0.19, length 7.5 ± 0.1 mm and proper lifetime (5.9 ± 0.1) × 10−13 s.

Observation of a fully reconstructed D0D0 pair with long proper lifetimes in a high resolution hydrogen bubble chamber and the European hybrid spectrometer

MENICHETTI, Ezio;
1981-01-01

Abstract

In an experiment with 360 GeV/cπ− beam at the CERN SPS using the high resolution hydrogen bubble chamber LEBC and the European Hybrid Spectrometer, an event has been observed of the type π−p→D0D0 + 8 prongs. The fully reconstructed decay modes are D0→K−π+π0π0andD0→K+π+π−π− , with all six charged tracks being detected in the spectrometer and all four photons from the π0 decays detected in the lead glass gamma detection system. The D0 has momentum 119.0 ± 0.6 GeV/c, xF = 0.31, length 4.1 ± 0.1 mm and proper lifetime (2.1 ± 0.1) × 10−13 s. The D0 has momentum 78.5 ± 0.3 GeV/c, xF = 0.19, length 7.5 ± 0.1 mm and proper lifetime (5.9 ± 0.1) × 10−13 s.
1981
102
285
290
http://www.sciencedirect.com/science/article/pii/0370269381908777
B. Adeva;M. Aguilar-Benitez;W. Allison;P. Bagnaia;B. Baldo;L. Barone;W. Bartl;A. Bergier;A. Bettini;R. Bizzarri;M. Boratav;G. Borreani;F. ...espandi
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/107410
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 12
  • ???jsp.display-item.citation.isi??? ND
social impact