Measurement of Lambda(+)(c) production in neutrino charged-current interactions


Kayis-Topaksu A. , Onengut G., van Dantzig R., de Jong A., Melzer O., Oldeman R., ...Daha Fazla

PHYSICS LETTERS B, cilt.555, ss.156-166, 2003 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 555
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1016/s0370-2693(03)00045-5
  • Dergi Adı: PHYSICS LETTERS B
  • Sayfa Sayıları: ss.156-166

Özet

A measurement of Lambda(c)(+) production in neutrino nucleon charged-current interactions is presented. In a subsample of about 50 000 interactions located in the emulsion target of the CHORUS detector, exposed to the wide band neutrino beam of the CERN SPS, candidates for decays of short-lived particles were identified using new automatic scanning systems and later confirmed through visual inspection. Criteria based on the flight length allowed a statistical separation among the different charm species thus enabling a sample particularly rich in Lambda(c)(+) to be defined. At an average neutrino energy of 27 GeV, the product sigma(Lambda(c)(+))/sigma(CC) x BR(Lambda(c)(+) --> 3p) was measured to be (0.37 +/- 0.10(stat) +/- 0.02(syst)) x 10(-2), while the values of (1.54 +/- 0.35(stat) +/- 0.18(syst)) x 10(-2) and of 0.24 +/- 0.07(stat) +/- 0.04(syst) were obtained for sigma(Lambda(c)(+))/sigma(CC) and BR(Lambda(c)(+) --> 3p), respectively. (C) 2003 Elsevier Science B.V. All rights reserved.