$Υ$ absorption in hadronic matter

Details $Υ$ absorption in hadronic matter $Υ$ absorption in hadronic matter

2000-07-12

arxiv.org/abs/nucl-th/0007027v2

Phys.Lett. B503 (2001) 104-112

Physics

Nuclear Physics

Nuclear Theory

11 pages, revtex, 3 figures, added references and discussion on higher BBbar states

Scientific paper

10.1016/S0370-2693(01)00092-2

The cross sections of $\Upsilon$ absorption by $\pi$ and $\rho$ mesons are evaluated in a meson-exchange model. Including form factors with a cutoff parameter of 1 or 2 GeV, we find that due to the large threshold of these reactions the thermal average of their cross sections is only about 0.2 mb at a temperature of 150 MeV. Our results thus suggest that the absorption of directly produced $\Upsilon$ by hadronic comovers in high energy heavy ion collisions is unimportant.

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