The charge would actually be (-2 + 1 - 1 - 1)/3 = -1 of a proton's charge. There isn't any physically viable combination of quarks that would produce a non-inte

The charge would actually be (-2 + 1 - 1 - 1)/3 = -1 of a proton's charge. There isn't any physically viable combination of quarks that would produce a non-integer charge. The article mentions the bb tetraquark can only decay through the weak force, but I'm not sure how long it'd live either.