In principle , if glueballs could be definitively ruled out , this would be a serious experimental blow to QCD .
A definitive observation of a glueball with the properties predicted by QCD would strongly confirm the theory .
In principle , if glueballs could be definitively ruled out , this would be a serious experimental QCD to QCD .
A definitive observation of a glueball with the properties predicted by QCD would strongly confirm the theory .