Elsevier

Nuclear Physics B

Volume 176, Issue 1, 8 December 1980, Pages 13-36
Nuclear Physics B

Investigation of the decay of charmed particles produced in neutrino interactions

https://doi.org/10.1016/0550-3213(80)90061-9Get rights and content

Abstract

The decay of charmed particles produced by high-energy neutrinos has been studied by an experiment using simultaneously emulsion, bubble chamber and counter techniques. Eight charmed particle candidates, 5 positively charged and 3 neutral, have been found in the emulsion, where their production and decay have been directly observed. One of these events is identified as a Λc+ baryon of mass 2.26±0.02 GeV/c2 which undergoes the decay Λc+→pKπ+ after a proper time of (7.3±0.1) · 10−13 s.

A statistical analysis of the other observed decays leads to the mean-life values τ+=(2.5−1.1+2.2) · 10−13 s, τ0=(0.53−0.25+0.57) · 10−13 s, for the sample of charged particles enriched by a similar event found in a previous experiment, and for the sample of 3 neutral particles, respectively. The former value is only slightly affected by including in the sample the Λc+ event or excluding that of the previous experiment.

References (21)

  • E.H.S Burhop

    Nuovo Cim.

    (1965)
  • E.H.S Burhop

    Phys. Lett.

    (1976)
    A.L Read

    Phys. Rev.

    (1979)
  • C Angelini

    Phys. Lett.

    (1979)
  • D Allasia

    Phys. Lett.

    (1979)
  • P Bagnaia et al.

    Internal report IFU n. 706

    (Jan., 1978)
  • E Lamanna et al.

    Internal report IFU n. 182

    (March, 1980)
  • R Beuselinck

    Nucl. Instr.

    (1978)
  • S.L Glashow et al.

    Phys. Rev.

    (1970)
  • M.K Gaillard et al.

    Rev. Mod. Phys.

    (1975)
  • E.G Cazzoli

    Phys. Rev. Lett.

    (1975)
    G Goldhaber

    Phys. Rev. Lett.

    (1975)
There are more references available in the full text version of this article.

Cited by (31)

  • The large area emulsion tracker of the CHORUS experiment

    2002, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
  • Nuclear emulsions in a large, hybrid experiment (CHORUS) to search for v<inf>μ</inf> → v<inf>τ</inf> oscillations

    2000, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
    Citation Excerpt :

    Therefore, the modules and foils have been packed in vacuum at RH=(50–60)% in order to preserve their original water content (see Section 3). This humidity value was already tested not to give rise to an appreciable fading at room temperature [3], though for shorter periods. In addition, the whole exposure has been carried out within a box cooled at a temperature of (5.0±0.5)°C, containing the whole target area, and also including fibre trackers, the hexagonal magnet and the trigger planes.

  • Track sensitive targets, hybrid-and rapid cycling chambers

    1994, Nuclear Physics B (Proceedings Supplements)
  • Weak decays of charmed quarks and τ leptons

    1988, Nuclear Physics B (Proceedings Supplements)
  • The use of nuclear emulsion in hybrid detectors for high energy physics

    1986, International Journal of Radiation Applications and Instrumentation. Part
View all citing articles on Scopus
1

Middle East Technical University, Ankara, Turkey.

2

Inter-University Institute for High Energies, ULB-VUB, Brussels, Belgium.

3

For part of the time at CERN, Geneva, Switzerland.

4

University College, Dublin, Ireland.

5

University College, London, England.

6

Open University, Milton Keynes, England.

7

Istituto di Fisica dell'Università di Pisa and INFN, Sezione di Pisa, Italy.

8

istituto di Fisica dell'Università di Roma and INFN, Sezione di Roma, Italy.

9

Istituto di Fisica dell'Università di Torino and INFN, Sezione di Torino, Italy.

It is with deep regret that we record the death of Eric Burhop, and wish to recall his pioneering contribution to this field of physics.

∗∗

Now at Laboratori Nazionali INFN, Frascati, Italy.

Now at the Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Italy.

View full text