Neutron and proton spectra from the decay ofΛhypernuclei

Erratum: Neutron and proton spectra from the decay

An error in the computer program which evaluated nucleon spectra following the decay of Λ hypernuclei has been detected. The error affected the final state interaction (FSI) of the nucleons, reducing by a factor ten the nucleon-nucleon (NN) collision probability. When correcting the error, some results and conclusions of Ref. [1] have changed substantially. In this erratum we present the correc...

Neutron and proton spectra from the decay of Λ hypernuclei

We have determined the spectra of neutrons and protons following the decay of Λ hypernuclei through the oneand two-nucleon induced mechanisms. The momentum distributions of the primary nucleons are calculated and a Monte Carlo simulation is used to account for final state interactions. From the spectra we calculate the number of neutrons (Nn) and protons (Np) per Λ decay and show how the measur...

The Beta-, Neutrino- and Proton-Asymmetry in Neutron β-Decay

This article describes measurements of angular-correlation coefficients in the decay of free neutrons with the superconducting spectrometer PERKEO II. A method for measuring the β-asymmetry coefficient A is presented, as well as a new method for determining the neutrino-asymmetry coefficient B, which allows a value for the proton-asymmetry coefficient C to be obtained for the first time. An ong...

PANDA Precision Measurement of the Proton Asymmetry in Neutron Decay

Atmospheric proton and neutron spectra at energies above 1 GeV

We discuss an effective numerical method for solving the transport equations for cosmic ray nucleons in the atmosphere. It is demonstrated that the nucleon attenuation lengths are strongly energy and depth dependent due to the non-power-law behavior of the primary spectrum, growth of the total inelastic cross sections with energy, and scaling violation in the nucleon-nucleus interactions. The n...