Reanalysis of hyperon beta decay data on F/D

Ehrnsperger, B.; Schafer, A.

doi:10.1016/0370-2693(95)00204-X

Reanalysis of hyperon beta decay data on F/D

B. Ehrnsperger
(
- Frankfurt U.
)
,
A. Schafer
(
- Frankfurt U.
)

Nov, 1994

6 pages

Published in:

Phys.Lett.B 348 (1995) 619-622

e-Print:

hep-ph/9411267 [hep-ph]

DOI:

10.1016/0370-2693(95)00204-X

Report number:

UFTP-377-1994

View in:

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Abstract:

We reanalyse hyperon beta decay data to extract the corresponding F and D values. We show that flavour symmetry breaking effects lead naturally to a reduction of the

F/D

ratio. For proton and neutron our analyses suggests

F/D = 0.49 \pm 0.08

instead of

F/D = 0.575 \pm 0.016

which is generally used to analyse the spin data. Our smaller

F/D

value allows to fullfil the Ellis--Jaffe sum rule implying an unpolarized

s\bar s

-sea.

hyperon: semileptonic decay
semileptonic decay: hyperon
symmetry breaking: flavor
nucleon: spin
spin: nucleon
nucleon: structure function
structure function: polarization
polarization: structure function
sum rule: Ellis-Jaffe
numerical calculations: interpretation of experiments

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