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Quarkonium from the Fifth Dimension | | Sungho Hong
; Sukjin Yoon
; Matthew J. Strassler
; | | Date: |
5 Dec 2003 | | Journal: | JHEP 0404 (2004) 046 | | Subject: | hep-th | | Affiliation: | U. Pennsylvania), Sukjin Yoon, Matthew J. Strassler (U. Washington | | Abstract: | Adding fundamental matter of mass m_Q to N=4 Yang Mills theory, we study quarkonium, and "generalized quarkonium" containing light adjoint particles. At large ’t Hooft coupling the states of spin<=1 are anomalously light (Kruczenski et al., hep-th/0304032). We examine their form factors, and show these hadrons are unlike any known in QCD. By a traditional yardstick they appear infinite in size (as with strings in flat space) but we show that this is a failure of the yardstick. All of the hadrons are actually of finite size ~ sqrt{g^2N}/m_Q, regardless of their radial excitation level and of how many valence adjoint particles they contain. Certain form factors for spin-1 quarkonia vanish in the large-g^2N limit; thus these hadrons resemble neither the observed J/Psi quarkonium states nor rho mesons. | | Source: | arXiv, hep-th/0312071 | | Services: | Forum | Review | PDF | Favorites | |
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