tag:blogger.com,1999:blog-7315236707728759521.post927168614467175713..comments2022-05-22T16:56:19.478-06:00Comments on Dispatches From Turtle Island: A Bridge Too Far - Some Tetraquarks Are ImpossibleAndrew Oh-Willekehttp://www.blogger.com/profile/02537151821869153861noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-7315236707728759521.post-57923533288400964152017-03-06T09:09:06.195-07:002017-03-06T09:09:06.195-07:00You are correct.
The analysis is very lucid, how...You are correct. <br /><br />The analysis is very lucid, however, and the analogies to atoms are apt. In particular, the author really clarifies why it is the the relative magnitude of the quark masses impact the stability. Clearly, a bbcc tetraquark would be more stable than a cccc tetraquark, even if the cccc tetraquark were actually metastable due to a full calculation of the chromomagnetic effects.<br /><br />I also find the approach of starting with the chromoelectric case (i.e. non-moving quarks) before considering the effects due to generalizing to the chromomagnetic case (i.e. moving quarks) is an attractive strategy for analyzing the problem (Deur does the same thing in analyzing effects from gravitons).<br /><br />andrewhttps://www.blogger.com/profile/08172964121659914379noreply@blogger.comtag:blogger.com,1999:blog-7315236707728759521.post-66995926832788541922017-03-04T17:32:32.192-07:002017-03-04T17:32:32.192-07:00They're not actually QCD calculations in the p...They're not actually QCD calculations in the paper on "fully heavy" tetraquarks - just various QCD-inspired guesses at the interquark potentials. Mitchellhttps://www.blogger.com/profile/10768655514143252049noreply@blogger.com