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Nope. This is the first time ive seen that option.
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<div class="">Cheers</div>
<div class="">Raghav</div>
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<div class="">On May 20, 2016, at 5:23 PM, Holger Schulz <<a href="mailto:holger.schulz@durham.ac.uk" class="">holger.schulz@durham.ac.uk</a>> wrote:</div>
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<p class="">Hi Raghav,</p>
<p class="">is there any chance that you are running rivet with --ignore-beams?</p>
<p class="">Holger<br class="">
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<div class="moz-cite-prefix">On 20/05/16 08:32, Raghav Kunnawalkam Elayavalli wrote:<br class="">
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<div class="" style="word-wrap:break-word">Dear David,
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<div class="">Yeah that was my guess as well w.r.t the neutrinos was missing ET, but in pp simulations there shoudnt this large of a difference. Here is a simple rivet analysis with a hepMC files that i generated for W+Jet events. </div>
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<div class="">Cheers</div>
<div class="">Raghav<br class="">
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<div class="">On May 19, 2016, at 11:56 PM, David Grellscheid <<a moz-do-not-send="true" href="mailto:david.grellscheid@durham.ac.uk" class="">david.grellscheid@durham.ac.uk</a>> wrote:</div>
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float:none; display:inline!important">Hi
Raghav,</span><br class="" style="font-family:Helvetica; font-size:12px;
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float:none; display:inline!important">it
would help us a lot if you could implement both methods in a single minimal analysis cc file which is ready to be used, filling one histo each.</span><br class="" style="font-family:Helvetica; font-size:12px;
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float:none; display:inline!important">One
difference I can see at the moment is that individual neutrinos aren't used in WFinder. It uses missing E.</span><br class="" style="font-family:Helvetica; font-size:12px;
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float:none; display:inline!important">See
you,</span><br class="" style="font-family:Helvetica; font-size:12px;
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float:none; display:inline!important">On
19/05/2016 15:31, Raghav Kunnawalkam Elayavalli wrote:</span><br class="" style="font-family:Helvetica; font-size:12px;
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Hi Rivet Experts,<br class="">
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I think there might be something happening with the WFinder in the latest version of Rivet. Ive attached two invariant mass plots here and [1] is using the WFinder and [2] is what i estimate by hand. You can see a big difference in the distributions even for
pp at 2.76 TeV. When we do our heavy ion events we lose a whole lot of Z's which are recovered by estimating by hand. Yes, there are a few differences in the two methods, but between 0.1 and 0.2 in delR and missing ET cut, i dont think it should be such a
huge difference?<br class="">
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Cheers<br class="">
Raghav<br class="">
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[1] WFinder wfinder(fs, Cuts::abseta < 3.0 && Cuts::pT > 20*GeV, PID::MUON, 0.0*GeV, 1000.0*GeV, 25.0*GeV, 0.2);<br class="">
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[<a moz-do-not-send="true" href="cid:84252C3A-9047-425F-90A1-0527877B491B@cern.ch]" class="">cid:84252C3A-9047-425F-90A1-0527877B491B@cern.ch]</a><br class="">
[2] in the init() method:<br class="">
IdentifiedFinalState allleptons;<br class="">
// allleptons.acceptIdPair(PID::ELECTRON);<br class="">
allleptons.acceptIdPair(PID::MUON);<br class="">
Cut cuts = Cuts::abseta < 2.5 && Cuts::pT > 20*GeV;<br class="">
DressedLeptons leptons(fs, allleptons, 0.1, cuts);<br class="">
addProjection(leptons, "leptons");<br class="">
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// Leading neutrinos for Etmiss<br class="">
LeadingParticlesFinalState neutrinos(fs);<br class="">
// neutrinos.addParticleIdPair(PID::NU_E);<br class="">
neutrinos.addParticleIdPair(PID::NU_MU);<br class="">
neutrinos.setLeadingOnly(true);<br class="">
addProjection(neutrinos, "neutrinos");<br class="">
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in the analyze() method:<br class="">
// implementation of simple Wfinder<br class="">
const vector<DressedLepton>& leptons = applyProjection<DressedLeptons>(event, "leptons").dressedLeptons();<br class="">
Particles neutrinos = applyProjection<FinalState>(event, "neutrinos").particlesByPt();<br class="">
if (leptons.size() != 1 || (neutrinos.size() == 0)) {<br class="">
vetoEvent;<br class="">
}<br class="">
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FourMomentum lepton = leptons[0].momentum();<br class="">
FourMomentum p_miss = neutrinos[0].momentum();<br class="">
if (p_miss.Et() < 25.0*GeV) {<br class="">
vetoEvent;<br class="">
}<br class="">
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double invMass = sqrt(2.0 * lepton.pT()/GeV * p_miss.pT()/GeV * (cosh(lepton.eta()-p_miss.eta()) - cos( lepton.phi()-p_miss.phi()) ) );<br class="">
_h_W_massCheck->fill(invMass, weight);<br class="">
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[<a moz-do-not-send="true" href="cid:375AF03C-519A-4CB4-B220-45CBE3297EAA@cern.ch]" class="">cid:375AF03C-519A-4CB4-B220-45CBE3297EAA@cern.ch]</a><br class="">
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<pre wrap="" class="">_______________________________________________
Rivet mailing list
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