%ATLASPUBLICHEADER% %STARTINCLUDE% *Information Common To All Plots* ρ is calculated using k<sub>t</sub> R=0.4 jets reconstructed from locally calibrated (LCW) topoclusters within |η|<2. The density calculation is with respect to the Voronoi area of the jets as defined in [[http://iopscience.iop.org/1126-6708/2008/04/005][JHEP 0804 (2008) 005]]. Topoclusters are an attempt to reconstruct three-dimensional energy deposits in the calorimeter and are built using a nearest-neighbor algorithm that clusters calorimeter cells with energy significance (|E<sub>cell</sub>|/σ) >4 for the seed, >2 for neighbors, and >0 at the boundary. E<sub>cell</sub> is calibrated using informaton derived from test beam and detailed GEANT4 simulatons (EM scale) and σ is the sum in quadrature of the electronic and expected pileup noise, as described in Sec. 10.5.2 of [[http://iopscience.iop.org/1748-0221/3/08/S08003][JINST 3 (2008) S08003]]. Topoclusters can be further calibrated using local information (LCW) as described in [[http://www.sciencedirect.com/science/article/pii/S0168900204012884][Nucl. Instrum. Meth. A 531 (2004) 481]]. The value of the pileup noise (σ<sub>noise</sub><sup>pile-up</sup>) used in the topoclustering is optimized for each value of pileup. Pileup is simulated by overlaying GEANT4 simulated events from PYTHIA (v6.4) including non-diffractive and diffractive events. Trimming is implemented (as in arXiv:1306.4945) by re-clustering the jet into subjets of radius R=0.3. The clusters belonging to subjets that carry at least 5% of the original jet p<sub>T</sub> are kept, and those clusters in subjets with less than 5% of the original jet p<sub>T</sub> are discarded. <table border="0"><tbody> <tr> <td bgcolor="#eeeeee"> Mean calorimeter-track jet mass ratio distributions r<sup>m</sup><sub>track jet</sub> as a function of jet mass for anti-k<sub>t</sub>, R = 1.0 trimmed jets. The distributions are shown for proton-proton collisions with a centre-of-mass energy of √s = 8 TeV and an integrated luminosity of L = 20 fb<sup>-1</sup> in the central calorimeter region, |η| < 1.2 and in the range 600 < p<sub>T</sub> < 800 GeV. The data/MC comparison R<sup>m</sup><sub>track jet</sub> for Pythia (blue) and Herwig (red) is shown in the lower part of the plot. </td> <td align="center" colspan=1><a href="%ATTACHURLPATH%/h_mass_ratio_vs_m_absEta_0.0_0.8_pT_500_600_approved.png"><img width="250px" alt="" src="%ATTACHURLPATH%/h_mass_ratio_vs_m_absEta_0.0_0.8_pT_500_600_approved.png" /> </a> <br /> <a href="%ATTACHURLPATH%/h_mass_ratio_vs_m_absEta_0.0_0.8_pT_500_600_approved.eps">[eps]</a></td> </tr> </td> </tr> <tr> <td bgcolor="#eeeeee"> Mean calorimeter-track jet mass ratio distributions r<sup>m</sup><sub>track jet</sub> as a function of jet p<sub>T</sub> for anti-k<sub>t</sub>, R = 1.0 trimmed jets. The distributions are shown for proton-proton collisions with a centre-of-mass energy of √s = 8 TeV and an integrated luminosity of L = 20 fb<sup>-1</sup> in the central calorimeter region, |η| < 1.2 and in the range 600 < p<sub>T</sub> < 800 GeV. The data/MC comparison R<sup>m</sup><sub>track jet</sub> for Pythia (blue) and Herwig (red) is shown in the lower part of the plot. </td> <td align="center" colspan=1><a href="%ATTACHURLPATH%/h_mass_ratio_vs_pT_absEta_0.0_0.8_pT_500_600_approved.png"><img width="250px" alt="" src="%ATTACHURLPATH%/h_mass_ratio_vs_pT_absEta_0.0_0.8_pT_500_600_approved.png" /> </a> <br /> <a href="%ATTACHURLPATH%/h_mass_ratio_vs_pT_absEta_0.0_0.8_pT_500_600_approved.eps">[eps]</a></td> </tr> </td> </tr> <tr> <td bgcolor="#eeeeee"> Mean calorimeter-track jet mass ratio distributions r<sup>m</sup><sub>track jet</sub> as a function of jet mass/p<sub>T</sub> for anti-k<sub>t</sub>, R = 1.0 trimmed jets. The distributions are shown for proton-proton collisions with a centre-of-mass energy of √s = 8 TeV and an integrated luminosity of L = 20 fb<sup>-1</sup> in the central calorimeter region, |η| < 1.2 and in the range 600 < p<sub>T</sub> < 800 GeV. The data/MC comparison R<sup>m</sup><sub>track jet</sub> for Pythia (blue) and Herwig (red) is shown in the lower part of the plot. </td> <td align="center" colspan=1><a href="%ATTACHURLPATH%/h_mass_ratio_vs_m_over_pT_absEta_0.0_0.8_pT_500_600_approved.png"><img width="250px" alt="" src="%ATTACHURLPATH%/h_mass_ratio_vs_m_over_pT_absEta_0.0_0.8_pT_500_600_approved.png" /> </a> <br /> <a href="%ATTACHURLPATH%/h_mass_ratio_vs_m_over_pT_absEta_0.0_0.8_pT_500_600_approved.eps">[eps]</a></td> </tr> </td> </tr> </tbody> </table> <!-- *********************************************************** --> <!-- Do NOT remove the remaining lines, but add requested info as appropriate--> <!-- *********************************************************** --> --- <!-- For significant updates to the topic, consider adding your 'signature' (beneath this editing box) --> *Major updates*:%BR% -- Main.MichaelBegel - 07-Aug-2013 <!-- Person responsible for the page: Either leave as is - the creator's name will be inserted; Or replace the complete REVINFO tag (including percentages symbols) with a name in the form Main.TwikiUsersName --> %RESPONSIBLE% %REVINFO{"$wikiusername" rev="1.1"}% %BR% %SUBJECT% public %BR% <!-- Once this page has been reviewed, please add the name and the date e.g. Main.StephenHaywood - 31 Oct 2006 --> %STOPINCLUDE%
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Topic revision: r2 - 2013-08-09
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MichaelBegel
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