<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
</head>
<body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">
<div><br>
</div>
<div>Dear all, </div>
<div><br>
</div>
<div>We run EPOS generator on mcplots but having a normalization issue. Probably, this is only a matter of units since the difference with the data is ~10^9. Please see the plot attached where the histograms are scaled as "scale(histogram, crossSection()/millibarn/sumOfWeights())"
in Rivet. </div>
<div><br>
</div>
<div>If I look at the HepMC output of EPOS, I see that the cross-section is stored as "mb" while it is "pb" in pythia6 HepMC (2.06.08) output. ("pb" is fine according to the HepMC > 2 manual).</div>
<div><br>
</div>
<div>I think, Rivet expects to find the cross-section information in "pb" ? If yes, this problem should be fixed in EPOS HepMC interface, right ? or is there any other solution can be provided by Rivet side ?</div>
<div><br>
</div>
<div>
<div><b>================================================</b></div>
</div>
<div>eposPath = /afs/cern.ch/sw/lcg/external/MCGenerators_hepmc2.06.08/epos/1.99.crmc.v2975/x86_64-slc5-gcc43-opt</div>
<div><br>
</div>
<div>
<div>EPOS output:</div>
<div>
<div>HepMC::Version 2.06.08</div>
<div>HepMC::IO_GenEvent-START_EVENT_LISTING</div>
<div>E 0 -1 -1.0000000000000000e+00 -1.0000000000000000e+00 -1.0000000000000000e+00 0 0 316 1 2 0 0</div>
<div>U GEV MM</div>
<div><b>C 7.2458518981933594e+01</b> 0.0000000000000000e+00</div>
</div>
</div>
<div><br>
</div>
<div>------------------</div>
<div><br>
</div>
<div>agilePath = /afs/cern.ch/sw/lcg/external/MCGenerators_hepmc2.06.08/agile/1.4.0/x86_64-slc5-gcc43-opt</div>
<div>agile-runmc Pythia6:424 --beams=LHC:7000 -n ${NOE} -o output.hepmc</div>
<div>
<div>HepMC::Version 2.06.08</div>
<div>HepMC::IO_GenEvent-START_EVENT_LISTING</div>
<div>E 2 -1 -1.0000000000e+00 -1.0000000000e+00 -1.0000000000e+00 0 0 195 1 2 0 1 1.0000000000e+00</div>
<div>N 1 "0"</div>
<div>U MEV MM</div>
<div><b>C 4.8444950025e+10 4.8444950025e+10</b></div>
</div>
<div><b>================================================</b></div>
<div><b><br>
</b></div>
<div><b><br>
</b></div>
<div>Thanks in advance, </div>
<div><br>
</div>
<div>Cheers,</div>
<div>Sercan </div>
<div><br>
</div>
<div><br>
</div>
<div><b><br>
</b></div>
<div><b><span class="Apple-style-span" style="font-weight: normal; "><img id="de663803-7455-4ae3-adc1-b90cbfa3bc48" height="705" width="511" apple-width="yes" apple-height="yes" src="cid:30459749-62F8-42E5-B4D5-D74E6A01F170"></span></b></div>
</body>
</html>