<html><body><div style="color:#000; background-color:#fff; font-family:verdana, helvetica, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1434441264448_26576"><span>Hi All,</span></div><div id="yui_3_16_0_1_1434441264448_26576"><span><br></span></div><div id="yui_3_16_0_1_1434441264448_26576" dir="ltr"><span id="yui_3_16_0_1_1434441264448_26610">I have another question. When ZFinder want to include the photons' energy and momentum (photon within the cone size that you set) to leptons, does it consider the particle ID and particle's mother ID since I don't want to include the photon which comes from Pion or other hadrons.</span></div><div id="yui_3_16_0_1_1434441264448_26576" dir="ltr"><span><br></span></div><div id="yui_3_16_0_1_1434441264448_26576" dir="ltr"><span>Yu-hsiang </span></div><div id="yui_3_16_0_1_1434441264448_26576"><br></div> <br><div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: verdana, helvetica, sans-serif; font-size: 16px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"> <font size="2" face="Arial"> Yu-hsiang Chang 張祐祥 <index0192@yahoo.com.tw> 於 2015/6/11 (週四) 4:51 PM 寫道﹕<br> </font> </div> <br><br> <div class="y_msg_container"><div id="yiv1023745946"><div><div style="color:#000;background-color:#fff;font-family:verdana, helvetica, sans-serif;font-size:13px;"><div id="yiv1023745946yui_3_16_0_1_1434003159124_45290"><span id="yiv1023745946yui_3_16_0_1_1434003159124_45662">Dear Frank,</span></div><div id="yiv1023745946yui_3_16_0_1_1434003159124_45290"><span><br clear="none"></span></div><div id="yiv1023745946yui_3_16_0_1_1434003159124_45290"><span id="yiv1023745946yui_3_16_0_1_1434003159124_45636">After I set the cone size of ZFinder = 0.0</span></div><div id="yiv1023745946yui_3_16_0_1_1434003159124_45290"><span><br clear="none"></span></div><div id="yiv1023745946yui_3_16_0_1_1434003159124_45290"> </div><div class="yiv1023745946" dir="ltr" id="yiv1023745946yui_3_16_0_1_1434003159124_45703" style=""> <span class="yiv1023745946" style="">const</span> ZFinder zfe(fs, -<span class="yiv1023745946" id="yiv1023745946yui_3_16_0_1_1434003159124_45713" style="">2.5</span>, <span class="yiv1023745946" id="yiv1023745946yui_3_16_0_1_1434003159124_45712" style="">2.5</span>, <span class="yiv1023745946" style="">0</span>*GeV, PID::ELECTRON, <span class="yiv1023745946" style="">15</span>*GeV, <span class="yiv1023745946" id="yiv1023745946yui_3_16_0_1_1434003159124_45702" style="">1500</span>*GeV, <span class="yiv1023745946" style="">0.0</span> );</div> <div class="yiv1023745946" id="yiv1023745946yui_3_16_0_1_1434003159124_45290" style=""><span class="yiv1023745946" style=""><br clear="none" class="yiv1023745946" style=""></span></div><div class="yiv1023745946" dir="ltr" id="yiv1023745946yui_3_16_0_1_1434003159124_45290" style=""><span class="yiv1023745946" id="yiv1023745946yui_3_16_0_1_1434003159124_45930" style="">I see my rivet result(red) is consistent with the post-FSR result(blue).</span></div><div class="yiv1023745946" dir="ltr" id="yiv1023745946yui_3_16_0_1_1434003159124_45290" style=""><span class="yiv1023745946" style=""><br clear="none"></span></div><div class="yiv1023745946" dir="ltr" id="yiv1023745946yui_3_16_0_1_1434003159124_45290" style=""><span class="yiv1023745946" id="yiv1023745946yui_3_16_0_1_1434003159124_46006" style="">Now I am asking the author their cone size for pre-FSR.</span></div><div class="yiv1023745946" dir="ltr" id="yiv1023745946yui_3_16_0_1_1434003159124_45290" style=""><span class="yiv1023745946" style=""><br clear="none"></span></div><div class="yiv1023745946" dir="ltr" id="yiv1023745946yui_3_16_0_1_1434003159124_45290" style=""><span class="yiv1023745946" style="">Thanks.</span></div><div class="yiv1023745946" dir="ltr" id="yiv1023745946yui_3_16_0_1_1434003159124_45290" style=""><span class="yiv1023745946" style=""><br clear="none"></span></div><div class="yiv1023745946" dir="ltr" id="yiv1023745946yui_3_16_0_1_1434003159124_45290" style=""><span class="yiv1023745946" style="">Yu-hsiang</span></div><div class="yiv1023745946" dir="ltr" id="yiv1023745946yui_3_16_0_1_1434003159124_45290" style=""><span class="yiv1023745946" style=""><br clear="none"></span></div><div class="yiv1023745946" dir="ltr" id="yiv1023745946yui_3_16_0_1_1434003159124_45290" style=""><span class="yiv1023745946" style=""><br clear="none"></span></div><div class="yiv1023745946" dir="ltr" id="yiv1023745946yui_3_16_0_1_1434003159124_45290" style=""><span class="yiv1023745946" style=""><br clear="none"></span></div><div class="yiv1023745946" dir="ltr" id="yiv1023745946yui_3_16_0_1_1434003159124_45290" style=""><span class="yiv1023745946" style=""> </span></div><div class="yiv1023745946" id="yiv1023745946yui_3_16_0_1_1434003159124_45290" style=""><span class="yiv1023745946" style=""><br clear="none"></span></div><div class="yiv1023745946" id="yiv1023745946yui_3_16_0_1_1434003159124_45290" style=""><span class="yiv1023745946" style=""><br clear="none"></span></div><div class="yiv1023745946" id="yiv1023745946yui_3_16_0_1_1434003159124_45290" style=""><span class="yiv1023745946" style=""><br clear="none"></span></div><br clear="none"><div class="yiv1023745946qtdSeparateBR"><br clear="none"><br clear="none"></div><div class="yiv1023745946yahoo_quoted" style="display: block;"> <div style="font-family:verdana, helvetica, sans-serif;font-size:13px;"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div dir="ltr"> <font size="2" face="Arial"> Frank Siegert <frank.siegert@cern.ch> 於 2015/6/9 (週二) 7:03 PM 寫道﹕<br clear="none"> </font> </div> <br clear="none"><br clear="none"> <div class="yiv1023745946yqt9660079199" id="yiv1023745946yqt45054"><div class="yiv1023745946y_msg_container">Hi Yu-hsiang,<br clear="none"><br clear="none">the ZFinder object will (by default) use "dressed" leptons, which<br clear="none">means that photon radiation within a cone of dR=0.1 is included. This<br clear="none">is a generator independent and less QED-FSR-dependent definition,<br clear="none">which is neither pre-FSR (often called "Born" level leptons) nor<br clear="none">post-FSR (often called "bare" leptons). It does sum parts of the FSR<br clear="none">but not all of it (namely not the wide angle emissions). If you want<br clear="none">to use "bare" leptons for your comparison you would have to set dR=0.0<br clear="none">in the ZFinder constructor.<br clear="none"><br clear="none">If on the other hand you are writing a Rivet plugin for an actual<br clear="none">experimental measurement the question is what is the truth level to<br clear="none">which your analysis has been unfolded ("dressed", "Born" or "bare")?<br clear="none"><br clear="none">Cheers,<br clear="none">Frank<br clear="none"><br clear="none"><div class="yiv1023745946yqt4377262833" id="yiv1023745946yqtfd77654"><br clear="none">On 9 June 2015 at 12:14, Yu-hsiang Chang 張祐祥 <<a rel="nofollow" shape="rect" ymailto="mailto:index0192@yahoo.com.tw" target="_blank" href="mailto:index0192@yahoo.com.tw">index0192@yahoo.com.tw</a>> wrote:<br clear="none">> Hi all,<br clear="none">><br clear="none">> I have question for the FinalState and the ZFinder in Rivet.<br clear="none">><br clear="none">> I want to know when I take the Z boson mass from the ZFinder, it is pre-FSR<br clear="none">> or post-FSR? (undergoes final state radiation(FSR) or not. In other words,<br clear="none">> does the 4-momentum of Z boson includes the energy and momentum of the FSR<br clear="none">> photon? )<br clear="none">><br clear="none">> For example, my Rivet plugin SMP_13_003.cc has these content :<br clear="none">><br clear="none">> ---------------------------------------------------<br clear="none">> void init() {<br clear="none">><br clear="none">> // Full final state<br clear="none">> const FinalState fs(-5.0, 5.0);<br clear="none">> addProjection(fs, "FS");<br clear="none">><br clear="none">> // Z finders for muons<br clear="none">> const ZFinder zfe(fs, -2.5, 2.5, 0*GeV, PID::ELECTRON, 15*GeV,<br clear="none">> 1500*GeV);<br clear="none">> addProjection(zfe, "ZFE");<br clear="none">><br clear="none">> ......<br clear="none">> }<br clear="none">><br clear="none">><br clear="none">> void analyze(const Event& event) {<br clear="none">><br clear="none">> const ParticleVector& z = zfe.bosons();<br clear="none">> const double mass_z = z[0].mass();<br clear="none">><br clear="none">> ......<br clear="none">> }<br clear="none">> ---------------------------------------------------<br clear="none">><br clear="none">> So I want to know the mass taken from the Z boson is pre-FSR or post-FSR?<br clear="none">><br clear="none">> Since I use the result of my rivet plugin (from YODA and then transform it<br clear="none">> to ROOT format),<br clear="none">> to compare with the pre-FSR and post-FSR mass of Z boson (generated by<br clear="none">> Powheg),<br clear="none">> and I find my rivet result is consistent to the pre-FSR instead of post-FSR.<br clear="none">> (previous one tell me that the FinalState object has already undergone the<br clear="none">> FSR,<br clear="none">> but since now I see inconsistent so I want to ask the part of ZFinder)<br clear="none">><br clear="none">> I put my rivet plugin (SMP_13_003.cc), and the comparison (snap shot ) in<br clear="none">> attachment.<br clear="none">> In comparison, the red point is the result of my rivet plugin, and the blue<br clear="none">> line is the pre-FSR or post-FSR.<br clear="none">><br clear="none">> Thanks.<br clear="none">><br clear="none">> Yu-hsiang</div><br clear="none">><br clear="none">><br clear="none">> _______________________________________________<br clear="none">> Rivet mailing list<br clear="none">> <a rel="nofollow" shape="rect" ymailto="mailto:Rivet@projects.hepforge.org" target="_blank" href="mailto:Rivet@projects.hepforge.org">Rivet@projects.hepforge.org</a><br clear="none">> <a rel="nofollow" shape="rect" target="_blank" href="https://www.hepforge.org/lists/listinfo/rivet">https://www.hepforge.org/lists/listinfo/rivet</a><br clear="none"><br clear="none"></div></div> </div> </div> </div></div></div></div><br><br></div> </div> </div> </div></div></body></html>