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28 March 2024
 
  » arxiv » 0808.1153

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In-medium modification of P-wave charmonia from QCD sum rules
Young-Ho Song ; Su Houng Lee ; Kenji Morita ;
Date 8 Aug 2008
AbstractWe investigate the changes of the masses and widths of $chi_{c0}$ and $chi_{c1}$ in hot gluonic matter near $T_c$ and in nuclear medium using QCD sum rules. As in the previous works for the $J/psi$ and $eta_c$, in-medium effects are incorporated through the changes of gluon condensates. Twist-2 terms for the $^3 P_0 (chi_{c0})$ and $^3 P_1 (chi_{c1})$ are also included for the first time. The results show that larger mass shifts and width broadenings take place as compared to the $S$-wave states. As the critical change take place near $T_c$, related measurements can reveal critical phenomenon in QCD.
Source arXiv, 0808.1153
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