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                  *       Update notes       *
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                  *    PYQUEN version 1.1    *
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                  (Last updated 26 April 2006)
 
PYQUEN version 1.1 is a direct continuation of version 1.0. 
It should be used with PYTHIA version 6.401 (or later versions). 

Main new or improved features from previous version 

1. New tolerance parameter paru(14) is introduced to ajust fragmentation of 
   strings containing in-medium emitted gluons in PYTHIA_6401 routine PYSTRF. 
   
2. Minimum transverse momentum, 200 MeV, is requested for in-medium emitted 
   gluon to be included in event list and strings. 
 
3. Cut off on maximum absolute pseudorapidity of hard parton to be rescattered
   in a medium is reduced to 3.5 (instead of 5. in previous version). 
   
4. Showering partons produced by the initial state radiation in PYTHIA are 
   not allowed to be rescattered in a medium.

5. Treatment of the option "vacuum showering after in-medium partonic energy 
   loss" is improved. 

6. Bug fix in PYQUEN subroutine PLJETR: when hard parton loses almost its 
   energy, restriction on values of collisional and radiative loss may need.  
   
7. Setting parameter mstp(111)=0 in main user routine is recommended to 
   switch off hadronization before calling pyquen instead of mstj(1)=0. 

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