<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<div style="word-wrap:break-word">Dear all,
<div><br>
</div>
<div>
<div class="x_BodyFragment">
<div class="x_PlainText"> I am attaching here the files for an analysis that I am trying to perform with Rivet. When I compared the results with Rivet <br>
with those that I obtain runnin</div>
</div>
</div>
</div>
<div style="word-wrap:break-word">
<div>
<div class="x_BodyFragment">
<div class="x_PlainText"></div>
</div>
</div>
</div>
<div style="word-wrap:break-word">
<div>
<div class="x_BodyFragment">
<div class="x_PlainText"></div>
</div>
</div>
</div>
<div style="word-wrap:break-word">
<div>
<div class="x_BodyFragment">
<div class="x_PlainText">g with the ALICE analysis tools (at MonteCarlo level), with the same Pythia tune, I obtain different </div>
<div class="x_PlainText">results (see attachment). The analysis is meant to produce the multiplicity distributions of charged particles with eta in [-0.8, 0.8], pt > ptcut, <br>
for ONLY the events with at least one such particle. The ptcut value can be 0.15, 0.5 or 1 GeV/c, and they correspond to the three histograms of the analysis.<br>
<br>
</div>
<div class="x_PlainText"> Could someone please take a look at the analysis I wrote (which is very short) and see if I made any mistake there? I tried to check the standard analysis (the one not with Rivet), </div>
<div class="x_PlainText">and there I cannot find anything weird… Even though I might be wrong, of course. But if i could exclude that the problem is in the Rivet code, it would be helpful.</div>
<div class="x_PlainText"><br>
</div>
<div class="x_PlainText"><span class="x_Apple-tab-span" style="white-space:pre"></span>I have also noticed that if I remove the weight in the filling of the histograms, I obtain different results (see further attachment for two out of the three histograms created
in my analysis). </div>
<div class="x_PlainText">What is this "weight"? How is it calculated? I thought it was equal to 1.</div>
<div class="x_PlainText"><br>
</div>
<div class="x_PlainText"><span class="x_Apple-tab-span" style="white-space:pre"></span>Thanks in advance for your help, and Regards,</div>
</div>
<div class="x_BodyFragment">
<div class="x_PlainText"><br>
Chiara<br>
</div>
<div class="x_PlainText"><br>
</div>
<div class="x_PlainText"><br>
</div>
<div class="x_PlainText"></div>
</div>
</div>
</div>
<div><img src="cid:24a40d88-3217-4e38-91c7-2b3b0b1e393b@cern.ch"> </div>
<div style="word-wrap:break-word">
<div>
<div class="x_BodyFragment">
<div class="x_PlainText"><span class="x_Apple-style-span" style="font-size:13px"> I am attaching here </span></div>
</div>
</div>
</div>
<div><img src="cid:bf915a04-6fe6-424d-8c32-bc94f53395d8@cern.ch"> </div>
<div style="word-wrap:break-word">
<div>
<div class="x_BodyFragment">
<div class="x_PlainText"><span class="x_Apple-style-span" style="font-size:13px">the files for an analysis that I am trying to perform with Rivet. When I compared the results with Rivet </span></div>
<div class="x_BodyFragment"><font size="2"><span style="font-size:10pt">
<div class="x_PlainText">with those that I obtain running with the ALICE analysis tools (at MonteCarlo level), with the same Pythia tune, I obtain different <br>
results. The analysis is meant to produce the multiplicity distributions of charged particles with eta in [-0.8, 0.8], pt > ptcut, <br>
for ONLY the events with at least one such particle. The ptcut value can be 0.15, 0.5 or 1 GeV/c. <br>
Could you please take a look at the analysis I wrote (which is very short) and see if I made any mistake there? Or if there <br>
is someone else to whom I</div>
</span></font></div>
<div class="x_BodyFragment"><font size="2"><span style="font-size:10pt">
<div class="x_PlainText">should better write, could you please let me know?<br>
<br>
Thanks in advance, and sorry to bother you again.<br>
<br>
Chiar<br>
</div>
</span></font></div>
</div>
</div>
</div>
</body>
</html>