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Ratios of 3J symbols/Clebsch Gordan coefficients
Posted:
Feb 24, 2014 12:44 PM


Dear group users,
I am working on the spherical harmonic decomposition of cosmic microwave background maps, therefore I often deal with functions that are proportional to Wigner 3J symbols/Clebsch Gordan coefficients.
I would be very grateful if you could share with me a closed form of the ratio between
(l1 l2 l3) ( 0 2 2)
and
(l1 l2 l3) ( 0 0 0) ,
for l1+l2+l3 even, if it exists. Ideally, I would like an expansion of the first 3jsymbol in terms of the second one, i.e.
first_3j = second_3j * ( 1 + ... )
Thank you for your consideration.
Best wishes, Guido



