Heavy quarkonium in vector and scalar channels
2009Published in:
- Nucl.Phys.A 820 (2009) 279C-282C
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Abstract: (Elsevier)
We study quarkonium in hot QCD, emphasizing its nature as a short-lived transient with an exponentially decaying wave function. The heavy quark mass allows for a nonrelativistic expansion around the two-quark threshold, and the static potential is then seen to contain a temperature-dependent imaginary part, which leads to an unstable quark-antiquark state. We solve the corresponding Schrodinger equation and estimate the spectral functions in different channels. In particular, through careful evalu ation we find a peak also in the scalar channel, although it is strongly suppressed with respect to the vector channel peak. We also plot the dilepton production rate, which shows a peak-like structure even at temperatures so high that the peak in the spe ctral function has disappeared.- 25.75.Cj
- Quark-gluon plasma
- quarkonium
- quarkonium: heavy
- expansion: nonrelativistic
- quark gluon: plasma
- potential: static
- heavy quark
- quark: mass
- spectral representation
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