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new UrQMD [message #15472] Mon, 09 September 2013 08:43 Go to previous message
Anna Senger is currently offline  Anna Senger
Messages: 49
Registered: April 2005
Location: GSI
continuous participant
From: *gsi.de
Hi. As you know Alla reported some problems with di-e J/psi due to new UrQMD. I checked this for di-mu J/psi. Last time I tried to produce MuCh start version for J/psi@10AGeV I can not understand, why it does not work anymore: S/B ratio = 0.02. I got early 0.8. Many thinks were changed: new more realistic STS, clustering in MuCh etc. But... I found that background is increased in new UrQMD too ! OK, it is really good to understand the problem. We need to live with that Rolling Eyes
 
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