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The CP phase in the strong sector comes from a topological term (a total derivative) $$\require{cancel} \mathcal L_{\cancel{CP}} \propto \theta_\mathrm{QCD} \epsilon^{\mu \nu \rho \sigma} G_{\mu \nu} G_{\rho \sigma}, $$ where $G_{\mu \nu}$ is the gluon field-strength. Such an operator can never be produced as an effective operator from weak interactions, ...


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Quark Gluon Plasma was originally referred as a "plasma" because some of the physics relating to "color charge" are very similar to the physics relating to a plasma of Coulomb charges. Quarks have "color charge", which are referred as red, green, and blue. Three colors will yield "white" and thus colorlesness/color-neutrality, analogously to how a positive ...


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If somebodys interested in the solution I just solved it myself :P \begin{equation} \begin{split} t^a t^b \otimes t^a t^b &= \frac{1}{16} [\lambda^a \lambda^b \otimes \lambda^a \lambda^b] \\ &= \frac{1}{16} \left[\frac{2}{N_c}\delta^{ab} \mathbb{1} + d^{abc} \lambda_c + ...


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if it's a singlet then its spin is 0. the SU(3) rep 3x3x3x3x3' (dim=243) decomposes into a bunch of 1,8,10,27, and 35 multiplets with many possible spins (mathematically speaking at least)


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I can't answer your question per se, but I hope I can offer something that's of some use: See this report: "The LHCb team is confident that the particles are indeed pentaquarks that comprise two up quarks, one down quark, one charm quark and one anticharm quark. "Benefitting from the large data set provided by the LHC, and the excellent precision of our ...



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