<div dir="auto">Are you sure this is appropriate? Normally efficiency is not a significant issue for (calo) jet constituents. I don't know of per-particle smearing info for clusters, but would be interested to know... I think Delphes has endured a shearing function like this, but no idea where their numbers came from.<div dir="auto"><br></div><div dir="auto">Re. the 10 GeV cut, this is again an efficiency, and it's appropriate for identified prompt particles, not for calo jet constituents. You'll get numbers out, but I'm sceptical about them bearing any similarity to full-sim. It'd be interesting to try the comparison, though: let me know if you'd like to follow that up in ATLAS.</div><div dir="auto"><br></div><div dir="auto">Andy</div></div><div class="gmail_extra"><br><div class="gmail_quote">On 4 Mar 2018 20:32, "Deepak Kar" <<a href="mailto:deepak.kar@cern.ch">deepak.kar@cern.ch</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Andy,<div><br></div><div>Thanks for the suggestions. I did manage to create a fatjet with smeared constituents now, with one caveat. I had to switch to using charged particles only to use track efficiency, in order not to have 10 GeV pT cut which other smeared objects have. </div><div><br></div><div>Something we can follow up in the May meeting, if and when that happens.</div><div><br></div><div>Cheers,</div><div>Deepak</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Mar 2, 2018 at 3:15 PM, Andy Buckley <span dir="ltr"><<a href="mailto:andy.buckley@cern.ch" target="_blank">andy.buckley@cern.ch</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>The latter should be possible, but not currently via the normal projection route: SmearedParticles inherits from ParticleFinder, while FastJets accepts a more specific FinalState projection as its source of particles. This is something to generalise, but last time I tried it turned out to be more involved than you might expect.</div><br><div>You should be able to use FastJets "interactively" via its calc() mechanism, though, e.g. somefastjetsproj.calc(smearedp<wbr>articlesproj.particles()); somefastjetsproj.jets(). We could/should also make that neater...</div><br><div>In response to the earlier question (I'm just back online after holiday), there's nothing specific to particle charge about the SmearedParticles mechanism, but the generic built-in smearing functions are mostly for well-isolated, fairly hard, identified particles. Constituent-level smearing for jet (substructure) reco would require something more specific than the built-ins -- that's part of why we <em>don't</em> currently smear the constituents of smeared jets (although I forget, do we rescale their momenta to be consistent with the jet momentum?) You can write your own constituent-smearing function fairly easily, though, with as simple or complex a smearing algorithm as you need.</div><br><div>Andy</div><br><div><u></u><div><table cellpadding="0" cellspacing="0"><tbody><tr><td colspan="2"><div style="padding-bottom:15px"><div><strong>Dr Andy Buckley, Lecturer / Royal Society University Research Fellow</strong></div><div>Particle Physics Experiment Group, University of Glasgow</div></div></td></tr><tr><td style="vertical-align:top"></td><td><div style="font-size:0.9em;white-space:nowrap;border-left:2px solid gray;margin-left:20px;padding-left:20px"><div><div></div><div></div></div></div></td></tr></tbody></table></div><u></u></div><div><div class="m_-7884996058936585956h5"><div class="m_-7884996058936585956m_421982385088972362gmail_quote_attribution">On Feb 28 2018, at 7:16 pm, Deepak Kar <<a href="mailto:deepak.kar@cern.ch" target="_blank">deepak.kar@cern.ch</a>> wrote:</div></div></div><blockquote><br><div><div><div class="m_-7884996058936585956h5"><div><div>Hi all,</div><div><br></div><div>Following up on my previous email, is there a way I can use SmearedParticles as inputs to jet forming?</div><div><br></div><div>Thanks,</div><div>Deepak</div></div><div><br><div><div>On Mon, Feb 26, 2018 at 8:05 PM, Deepak Kar <<a href="mailto:deepak.kar@cern.ch" title="mailto:deepak.kar@cern.ch" target="_blank">deepak.kar@cern.ch</a>> wrote:</div><blockquote><div><div>Dear experts,</div><div><br></div><div>I am trying to calculate some jet substructure variables (using fastjet contrib) of a smeared jet. Now it looks like only the jet is smeared, and the constituent information is lost. I guess the right way will be to smear the constituents before making the jet, but I could not see a generic smearing for charged and neutral particles. I can probably hack the electron smearing to apply it on cnfs, but is there an elegant way?</div><div><br></div><div>Thanks,</div><div><div>Deepak</div><div><br></div><div><span style="color:#888888">--</span></div><div><div><span style="color:#888888">Deepak Kar</span></div><div><span style="color:#888888">University of Witwatersrand</span></div><div><span style="color:#888888">Room PM15, School of Physics</span></div><div><span style="color:#888888"><a href="tel:+27%2011%20717%206958" value="+27117176958" target="_blank">(0027) 011-7176958</a> (office) <a href="tel:+27%2073%20694%204181" value="+27736944181" target="_blank">(0027) 0736944181</a> (mobile)</span></div><br><div><span style="color:#888888">While at CERN:</span></div><div><span style="color:#888888">Building 1, R-016</span></div><div><span style="color:#888888"><a href="tel:+41%2076%20732%2013%2049" value="+41767321349" target="_blank">(0041) 0767321349</a> (mobile)</span></div><br><div><span style="color:#888888">While at USA:</span></div><div><span style="color:#888888">(001) </span><span style="color:#888888"><a href="tel:(330)%20998-1500" title="tel:(330)%20998-1500" target="_blank">330-998-1500</a></span><span style="color:#888888"> (mobile)</span></div></div></div></div></blockquote></div><br><br><div><br></div><div>--</div><div><div>Deepak Kar</div><div>University of Witwatersrand</div><div>Room PM15, School of Physics</div><div><a href="tel:+27%2011%20717%206958" value="+27117176958" target="_blank">(0027) 011-7176958</a> (office) <a href="tel:+27%2073%20694%204181" value="+27736944181" target="_blank">(0027) 0736944181</a> (mobile)</div><br><div>While at CERN:</div><div>Building 1, R-016</div><div><a href="tel:+41%2076%20732%2013%2049" value="+41767321349" target="_blank">(0041) 0767321349</a> (mobile)</div><br><div>While at USA:</div><div>(001) <a href="tel:(330)%20998-1500" value="+13309981500" target="_blank">330-998-1500</a> (mobile)</div></div></div></div></div><div>______________________________<wbr>_________________</div><div>Rivet mailing list</div><div><a href="mailto:Rivet@projects.hepforge.org" target="_blank">Rivet@projects.hepforge.org</a></div><div><a href="https://www.hepforge.org/lists/listinfo/rivet" target="_blank">https://www.hepforge.org/lists<wbr>/listinfo/rivet</a></div></div></blockquote></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="m_-7884996058936585956gmail_signature" data-smartmail="gmail_signature">Deepak Kar<br>University of Witwatersrand<br>Room PM15, School of Physics<br><a href="tel:+27%2011%20717%206958" value="+27117176958" target="_blank">(0027) 011-7176958</a> (office) <a href="tel:+27%2073%20694%204181" value="+27736944181" target="_blank">(0027) 0736944181</a> (mobile)<br><br>While at CERN:<br>Building 1, R-016<br><a href="tel:+41%2076%20732%2013%2049" value="+41767321349" target="_blank">(0041) 0767321349</a> (mobile)<br><br>While at USA:<br><a href="tel:+1%20330-998-1500" value="+13309981500" target="_blank">(001) 330-998-1500</a> (mobile)</div>
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