$$Z_b(10610)$$ Zb(10610) in a hadronic medium
Abstract In this work we investigate the $$Z_b (10610)$$ Zb(10610) (called simply $$Z_b$$ Zb ) abundance in the hot hadron gas produced in heavy ion collisions after the quark–gluon plasma phase. We use effective Lagrangians to calculate the thermally averaged cross sections of $$Z_b $$ Zb productio...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2018-09-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-018-6182-5 |
| Summary: | Abstract In this work we investigate the $$Z_b (10610)$$ Zb(10610) (called simply $$Z_b$$ Zb ) abundance in the hot hadron gas produced in heavy ion collisions after the quark–gluon plasma phase. We use effective Lagrangians to calculate the thermally averaged cross sections of $$Z_b $$ Zb production in processes such as $$B^{(*)} + \bar{B}^{(*)} \rightarrow \pi + Z_b (10610)$$ B(∗)+B¯(∗)→π+Zb(10610) and also of its absorption in the corresponding inverse processes. We then solve the rate equation to follow the time evolution of the $$Z_b$$ Zb multiplicity. We find that, if we neglect the $$Z_b$$ Zb decay, the number of $$Z_b$$ Zb ’s produced at the end of the quark–gluon plasma phase remains almost constant during the hadron phase. The introduction of the decay in the rate equation leads to a suppression in the final yield by a factor two. |
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| ISSN: | 1434-6044 1434-6052 |