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arXiv · 1711.05205

$Z_b(10610)$ in a hadronic medium

L. M. Abreu·F. S. Navarra·M. Nielsen·A. L. Vasconcellos
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Abstract

In this work we investigate the $Z_b (10610)$ (called simply $Z_b$) abundance in the hot hadron gas produced in the late stage of heavy ion collisions. We use effective Lagrangians to calculate the thermally averaged cross sections of $Z_b $ production in processes such as $B^{(*)} + \bar{B}^{(*)} \to π+ Z_b (10610)$ and also of its absorption in the corresponding inverse processes. We then solve the rate equation to follow the time evolution of the $Z_b$ multiplicity, and the results remarkably suggest that this quantity is not significantly affected by the considered reactions. The number of $Z_b$'s produced at the end of the quark-gluon plasma phase remains constant during the hadron phase.

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L. M. Abreu, F. S. Navarra, M. Nielsen, A. L. Vasconcellos. 2017-11-14. $Z_b(10610)$ in a hadronic medium. https://doi.org/10.1140/epjc%2Fs10052-018-6182-5

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