Properties of K0 and Λ inclusive production in charged-current antineutrino-nucleon interactions

doi:10.1016/0550-3213(80)90260-6

Nuclear Physics B

Volume 162, Issue 2, 14 January 1980, Pages 205-219

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Abstract

In this paper we discuss inclusive spectra of K⁰'s and Λ's produced in charged in charged-current $ν_{μ} N$ interactions in the Fermilab 15 ft bubble chamber filled with a 64% Ne-H₂ mixture. Data presented in terms of the invariant cross section show, when compared with results from experiments with other incident beams, that the behavior of these distributions is approximately the same. The K⁰ and Λ fragmentation functions are presented and the shape of the K⁰ fragmentation function is found to be consistent with the parametrization of Field and Feynman.

The average K⁰ and Λ transverse momentum squared as a function of Q², W², x and z is presented. Comparisons for the K⁰'s produced in the current fragmentation region are in qualitative agreement with QCD predictions. The value of the Λ polarization is measured and a positive normal polarization P_N = 0.34±0.18 is found.

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The inclusive production of K⁰, Λ and $Λ$ in charged-current (anti) nuetrino interaction in deuterium is studied, using the BEBC bubble chamber exposed to the CERN-SPS wide band (anti) neutrino beam. In a selected sample of 8600 charged current ν_μd₂ and $6100 ν_{μ} d_{2}$ interactions, 700 K⁰, 448 Λ and $20 Λ$ particles were observed. The interactions have been separated in interactions on neutrons and on protons. The production properties are studied in terms of various kinematical variables. The associated production of strange particles, the production of $K^{∗±} (890)$ and of Σ^±(1385) and the inclusive Λ polarization are discussed. The experimental results are compared with the predictions of the Field-Feynman and the Lund fragmentation models.

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^☆: This work was supported in part by the US Department of Energy and the National Science Foundation.

^∗: We wish to thank the members of the Neutrino Laboratory at Fermilab and the scanning, measuring and secretarial staffs at our respective laboratories for their contribution to this experiment.

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Properties of K0 and Λ inclusive production in charged-current antineutrino-nucleon interactions☆

Abstract

Phys. Lett.

Phys. Lett.

Hydra Application Library

Rev. Mod. Phys.

Hadron production by leptons

Phys. Rev.

Phys. Rev.

Phys. Rev. Lett.

Properties of K⁰ and Λ inclusive production in charged-current antineutrino-nucleon interactions☆