https://zzz.physics.umn.edu/ 2026-05-19T16:14:16+00:00 https://zzz.physics.umn.edu/ https://zzz.physics.umn.edu/_media/wiki/dokuwiki.svg text/html 2009-07-15T21:55:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://zzz.physics.umn.edu/people/walstrom/auto_fit?rev=1247694914&do=diff Auto fit plots for Electron gun simulation (0 < |h| < 3.0) (100 < GeV < 1000) text/html 2009-09-22T22:06:45+00:00 Anonymous (anonymous@undisclosed.example.com) https://zzz.physics.umn.edu/people/walstrom/basic_clusters?rev=1253657205&do=diff I am looking into the “other” group. The matches which pass the .1 dR cut and the module cut, yet still have a poor resolution. text/html 2009-08-28T22:49:19+00:00 Anonymous (anonymous@undisclosed.example.com) https://zzz.physics.umn.edu/people/walstrom/distance?rev=1251499759&do=diff Key PU2 - Blue PU20 - Green PU40 - Red Energy [Gev] This plot shows the distance between matched electrons and superclusers (dR). This shows a high percentage of good matches because the majority of dR values are quite small. Pile up appears to be related to closer matches and with significant pile up there appears to be no cases of high values of dR. This is attributed to the creation of superclusers by the particles created by pile up. As the number of pile up clusters goes up it incre… text/html 2009-09-14T18:30:30+00:00 Anonymous (anonymous@undisclosed.example.com) https://zzz.physics.umn.edu/people/walstrom/e-match?rev=1252953030&do=diff Basic Clusters This shows the results of matching the two electrons from the Z' to two superclusters. Taking the energy of that supercluster over the energy of the generator level electron. This was done with the hope of finding a more linear relation between resolution and pile up. The data does appear to relate in a more linear fashion than the mass peak widths. The same trend is observed where resolution is positively related to pile up and |h|. text/html 2009-06-17T21:35:03+00:00 Anonymous (anonymous@undisclosed.example.com) https://zzz.physics.umn.edu/people/walstrom/electrongun_forward_v1?rev=1245274503&do=diff Electron Gun Forward V1 Energy Resolution Distance Key PU2 - Blue PU20 - Green PU40 - Red Energy [Gev] text/html 2009-07-31T19:15:17+00:00 Anonymous (anonymous@undisclosed.example.com) https://zzz.physics.umn.edu/people/walstrom/electrongun_full?rev=1249067717&do=diff Res text/html 2009-08-26T23:57:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://zzz.physics.umn.edu/people/walstrom/energy?rev=1251331030&do=diff KEY Blue = PU2 Green = PU20 Red = PU40 Pile Up 2 = Blue Pile Up 20 = Green Pile up 40 = Red Energy of the Superclusters located exclusivly within the barrel (0.0 < #eta < 1.48). The effect of pile up increases the number of low energy Superclusters that are formed. This is expressed in the peak at low energies. The flat distrabution across the majority of the energy band is a representation of the flat distrabution simulated by the dielectron gun simulation. A quick drop off at 500 … text/html 2009-07-31T19:20:23+00:00 Anonymous (anonymous@undisclosed.example.com) https://zzz.physics.umn.edu/people/walstrom/eta_cuts?rev=1249068023&do=diff eta 1_1.5 text/html 2009-08-31T17:42:37+00:00 Anonymous (anonymous@undisclosed.example.com) https://zzz.physics.umn.edu/people/walstrom/extrapolation?rev=1251740557&do=diff This plot takes each energy band from the dielectron gun simulation and integrates over a single |h| bin. This is done so that it can be fit to a line as to extrapolate the fractional resolution at pile up equal to 200. The |h| bin which was integrated over was from (1.0 < |h| < 1.5), the forward barrel. All of the energy bands with the exception of the first two remain within 5% resolution at pile up 200. text/html 2009-07-31T19:12:16+00:00 Anonymous (anonymous@undisclosed.example.com) https://zzz.physics.umn.edu/people/walstrom/home?rev=1249067536&do=diff Electrongun_forward_V1 Electrongun_full Z_PRIME_SIM text/html 2009-08-31T19:37:26+00:00 Anonymous (anonymous@undisclosed.example.com) https://zzz.physics.umn.edu/people/walstrom/invariant_mass?rev=1251747446&do=diff This plot shows the mass peak for the Z' particle from the pythia simulation. As pile up increases there is a widening in the peak. The Z' is, in this simulation, forced to decay into two electrons. The reconstruction computes the invariant mass of the Z' using these two electrons. This makes this Simulation quite similar to the dielectron gun simulation. As was predicted, pile up effects the width of the peak by adding energy to the superclusters which are formed from the two electrons. text/html 2009-06-17T21:34:42+00:00 Anonymous (anonymous@undisclosed.example.com) https://zzz.physics.umn.edu/people/walstrom/ratio?rev=1245274482&do=diff text/html 2009-08-31T17:05:21+00:00 Anonymous (anonymous@undisclosed.example.com) https://zzz.physics.umn.edu/people/walstrom/res?rev=1251738321&do=diff extrapolation auto_fit Fractional resolution as a function of |h|. Also this data shows only the electrons which fit into the energy range (100 < E < 150).Each line corresponds to a different level of pile up. This shows the slope and progression of different levels of pile up as data is taken from low to high |h| values. The final value for Pile up 60 in high |h| was a bad fit and I believe does not represent a physical trend. text/html 2009-08-28T21:48:48+00:00 Anonymous (anonymous@undisclosed.example.com) https://zzz.physics.umn.edu/people/walstrom/resolution?rev=1251496128&do=diff Eta Cuts KEY Blue = PU2 Green = PU20 Red = PU40 Sigma vs Eta with PU 2 20 40 60 This plot was generated by taking the two superclusters which are closest to the two generated electrons from the dielectron gun. A ratio is taken of the energy of the supercluster over the energy of the matched electron. The width of this ratio represents the resolution of the reconstruction in ECAL. The high side tail is shown to increase as a function of |h|. the small collection of events at 0 repres… text/html 2009-10-03T20:45:37+00:00 Anonymous (anonymous@undisclosed.example.com) https://zzz.physics.umn.edu/people/walstrom/width?rev=1254602737&do=diff text/html 2009-10-03T20:47:34+00:00 Anonymous (anonymous@undisclosed.example.com) https://zzz.physics.umn.edu/people/walstrom/yield?rev=1254602854&do=diff text/html 2009-08-31T17:44:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://zzz.physics.umn.edu/people/walstrom/z_prime_sim?rev=1251740649&do=diff Invariant Mass Width Yield e-Match