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Neutron and proton spectra from the decay of Lambda hypernuclei
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Abstract
We have determined the spectra of neutrons and protons following the decay of
Λ
hypernuclei through the one- and 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. The shape of the proton spectrum is sensitive to the value of
Γ
n
/
Γ
p
the ratio of neutron- to proton-induced decay, and the available experimental information favors larger values than those predicted by the one-pion-exchange model. From the spectra we calculate the number of neutrons
(
N
n
)
and protons
(
N
p
)
per
Λ
decay and show how the measurement of these quantities, particularly
N
p
,
can lead to a determination of
Γ
n
/
Γ
p
.
We also show that the consideration of the two-nucleon-induced channel has a repercussion on the results, widening the band of allowed values of
Γ
n
/
Γ
p
with respect to what is obtained neglecting this channel.
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RAMOS GÓMEZ, Àngels, VICENTE-VACAS, M. J. and OSET BAGUENA, Eulogio. Neutron and proton spectra from the decay of Lambda hypernuclei. Physical Review C. 1997. Vol. 55, num. 2, pags. 735-744. ISSN 0556-2813. [consulted: 6 of June of 2026]. Available at: https://hdl.handle.net/2445/10972