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Tracking and Vertexing at CLIC
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Europe/Zurich
4/1-021 (CERN)
Description
First Meeting of CLIC WG-3
For the phone conference, please call: +41 22 767 7000 and ask for the LCD WG3 meeting, organised by Marco Battaglia.
Short-term action items:
- detector benchmarks: so far have used: smuons, selectrons (PointK') and nunuH(140) -> nunu mu+mu- for momentum resolution, qq for tracking in barrel, HA -> bbbb/bbtautau (Point K') for patrec and vertexing in barrel; nunuH(185) -> nunu bb for patrec and vertexing in forward; e+e-H(700) -> e+e-X for tracking in very forward region. Events for all these samples are available in stdhep (MC level), and slcio (G4, reco and dst) formats. Call for proposal of additional reactions with simple observables complementary to these above for first tracking and vertexing studies.
- generate maps of hit density/BX from machine-induced backgrounds (incoherent pairs and gamma gamma -> hadrons) for barrel (first results already available see first talk of the meeting) and forward using a strawman geometry: beampipe cylindrical with R= 30mm and z=+/-230mm and then conical up to R=184mm at z=+/-2400mm. VTX barrel extended to +/- 150mm, fwd disks at z = +/- 160, 200, 240, 280, 320, 500, ... Based on results of hit density decide on geometry to be used as starting point for optimisation of coverage and tracking/vertexing resolution. Aim at first results in mid-May for discussion at next
meeting.
- Study hit density from machine-induced backgrounds (pairs, gamma gamma -> hadrons and parallel muons) for CLIC SiD-like and ILD-like geometries.
- generate maps of hit density/ns from machine-induced backgrounds (pairs, gamma gamma -> hadrons and parallel muons) in main tracker for Si segmentation (strips & pixels, as proposed by C Damerell during
the discussion time) and TPC studies.
- study momentum resolution in fwd region in view of layout optimisation and implications for muon detection/reconstruction.
- get std definition of reference denominator sample for computing tracking effiency (understand algorithmic vs. physical efficiency).
Next WG meeting to be schedule around mid-May. Please email Marco.Battaglia@cern.ch about
possible black-out dates.
prepared by MB, 27 April, 2010
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