Difference: ForwardDetPublicResults (57 vs. 58)

Revision 582019-08-27 - MarcoBruschi

Line: 1 to 1
Line: 15 to 15
PLOT-FDET-2019-17 AFP-SiT Interplane Alignment

RUN2 - PLOT-FDET-2019-16 AFP-ToF Vertex Match in 2017 Data (CDS: https://cds.cern.ch/record/2675832 )
The distributions of z_ATLAS - z_ToF measured in events with ToF signals on both sides of the interaction region in run 341419, where z_ATLAS is the primary vertex z-position reconstructed by ATLAS. The z_ToF is obtained as z_ToF = -c/2 Delta(t), where Delta(t) is the time difference of proton arrival times in A and C far stations of the AFP measured by ToF. The distributions shown in figures a)-d) correspond to ATLAS data containing a reconstructed primary vertex together with coincidence of signals in both ToF detectors in three cut scenarios with respect to number of vertices reconstructed by ATLAS, 'no N_vtx cut', 'N_vtx <= 5' and 'N_vtx <= 3', respectively. A double Gaussian function representing the signal and background components is fitted to unbinned data samples using the extended likelihood fit as implemented in RooFit in all N_vtx cut scenarios. The mean of the signal component as well as the mean and width of the background component are always estimated from a Gaussian fit to the mixed event data (ME) in each N_vtx cut scenario separately, denoted as mu_sig^FIX, mu_bgd^FIX and sigma_bgd^FIX. The mixed event data z_ATLAS - z_ToF distributions are obtained by random mixing of times measured by ToF in either station and the z_ATLAS values which do not originate in the same collision event. The expected resolution of the ToF detector, quoted as sigma^ToF_expected is obtained from the known single-channel resolutions convoluted with the actual channel-hit-patterns observed in the data in the 'no N_vtx cut' scenario.

RUN2 - PLOT-FDET-2019-17 AFP-SiT Interplane Alignment (CDS: https://cds.cern.ch/record/2675953/)
Line: 1013 to 1023
  • Savannah_plots_2.jpg:
  • tof_vtx.jpg:

META FILEATTACHMENT attachment="Background.jpg" attr="h" comment="" date="1277354305" name="Background.jpg" path="Background.jpg" size="17009" stream="Background.jpg" tmpFilename="/usr/tmp/CGItemp52711" user="hedberg" version="1"
META FILEATTACHMENT attachment="Background.pdf" attr="h" comment="" date="1277354320" name="Background.pdf" path="Background.pdf" size="18533" stream="Background.pdf" tmpFilename="/usr/tmp/CGItemp52684" user="hedberg" version="1"
META FILEATTACHMENT attachment="BCID.jpg" attr="h" comment="" date="1277354357" name="BCID.jpg" path="BCID.jpg" size="16366" stream="BCID.jpg" tmpFilename="/usr/tmp/CGItemp52650" user="hedberg" version="1"
Line: 1302 to 1317
META FILEATTACHMENT attachment="Savannah_plots_1_tn.jpg" attr="h" comment="" date="1559546459" name="Savannah_plots_1_tn.jpg" path="Savannah_plots_1_tn.jpg" size="10795" user="bruschi" version="1"
META FILEATTACHMENT attachment="Savannah_plots_5_tn.jpg" attr="h" comment="" date="1559546459" name="Savannah_plots_5_tn.jpg" path="Savannah_plots_5_tn.jpg" size="10014" user="bruschi" version="1"
META FILEATTACHMENT attachment="Savannah_plots_2_tn.jpg" attr="h" comment="" date="1559546459" name="Savannah_plots_2_tn.jpg" path="Savannah_plots_2_tn.jpg" size="10507" user="bruschi" version="1"
META FILEATTACHMENT attachment="tof_vtx.jpg" attr="h" comment="" date="1566892659" name="tof_vtx.jpg" path="tof_vtx.jpg" size="21339" user="bruschi" version="1"
META FILEATTACHMENT attachment="tof_vtx.pdf" attr="h" comment="" date="1566892659" name="tof_vtx.pdf" path="tof_vtx.pdf" size="99453" user="bruschi" version="1"
This site is powered by the TWiki collaboration platform Powered by PerlCopyright & 2008-2019 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback