Report of our of Physics activities (update on status). Supreet Pal Singh Sunil Bansal (P.U.Chandigarh) (P.U.Chandigarh) Jasbir Singh Kajari Mazumdar
Supreet Pal Singh Sunil Bansal (P.U.Chandigarh) (P.U.Chandigarh)
Jasbir Singh Kajari Mazumdar
India_CMS meeting, Delhi28.9.7
Priority item at present, though in all cases we need to learn how to pick up
Electrons, muons, jets, MET, put proper corrections and so on.
ElectroWeak tau: …. , 6.7.7, 17.7.7, 27.8.7, 14.9.7, 28.9.7
Similarly in Higgs and B-physics
Needed to supply also various parameters, like efficiency of generation.
edited and tested many times according to changing whimzes of CMS management !!!!
(including background events expected in concerned primary datasets).
Sometimes it meant running jobs over Billions of events very quickly!
(already exists in CVS!)
Tau production from Z and W decays in pp collision at √s = 14 TeV
KM (among total 13) responsible for writing relevant section of the note.
(Analysis note will be submitted to CMS collaboration by mid-October)
Signal data is produced as inclusive decays of t s
W- W+e + m + X ( from inclusive W decays)
tt e + m + X (from inclusive top decays)
QCD jetse + m + X (split into about 25 pt bins)
Used mostly CRAB to access data.
Analysed Spring07 data with CMSSW_131_patch after rereco
(correction for electron).
Recently available signal data in large statistics with CMSSW_160, under study.
Local analysis on resulting root files.
Final set of selection and plots yet to be made.
CSA07 skimmed data is likely to be hosted in T2, Bari .
Update on Z tt e + m + Xanalysis
(requires event by event solution of two equations).
(requires leptons not to be back to back).
(affects reconstruction of Z-peak with collinear approximation of ns.
dedicated trigger path increases signal efficiency significantly but does not increase background rate too much.
Contains informations like:
(inclusive for 3 jets, MLM matching different)
(limit put by production group)
We would like to see the Bs peak above QCD background.
We are palnning to study other control channels (decays of
B-mesons with m and g in final state.)
Eta distribution of all reconstructed photons (no matching)
found skewed, reported, told to be known in CMS.
This distribution is only from a subsample of QCD dijets with pt bin 170-230 GeV
46+ physics skims, to be run at Tier1 s.
Hope we shall be able to do physics with relevant datasets:
Analysis note on Tau should come up in time.
Z tt e +m +X
tte + m + X
QCD jets e + m + X
Z e m
ttbar e m
WW e m
ttbar e m