This article: <a href="http:&#x2F;&#x2F;motls.blogspot.co.uk&#x2F;2015&#x2F;12&#x2F;first-batch-of-9-pheno-papers-on-new.html" rel="nofollow">http:&#x2F;&#x2F;motls.blogspot.co.uk&#x2F;2015&#x2F;12&#x2F;first-batch-of-9-pheno-p...</a> also mentions that spin 1 is disallowed by the Landau-Yang Theorem.  So it&#x27;s most likely spin 0.