Optimized Search for the First Generation LeptoQuarks

This analysis is the next pass of the standard 1st generation leptoquark analysis and consists of the loose event selection which utilizes both PELC and PPHO electrons, random grid search for cut optimization and mass analysis.

New data Ntuples

Click here for NTUPLE format description (132-column text file).

New Ntuples are being made for the optimized analysis by Greg Landsberg. Currently the following Ntuples are available on the disk in (FNALD0::)NEW_PHENOM_1$HROOT:[GREG.PLQ]

New Data Analysis

Dump glossary
Parameters of the 4 new candidates (132-column text file)
Parameters of the 3 standard candidates (132-column text file)

Results

Main Analysis Spreadsheet

QCD background data sheet
Drell-Yan background data sheet
Top background data sheet
Acceptance
Efficiency
Data
Data vs. Background prediction
Leptoquark Mass Limits

Parameters of the 8 candidates with ST > 250 (132-column text file)
Parameters of the 7 Z+jets candidates with ST > 300 (132-column text file)
For the ZOO-event hunters Z+2j event with ST=726 GeV AND A HOT CELL IN IT

Problems and Bugs

RG/NN search

RG/NN ntuple variables agreed upon at the LQ meeting 4/11/97
Excel spreadsheet or its HTML conversion or Plain text from Mark Strovink with the description on how to optimize S vs. B

Mass Fit

Link to the Mass Fit page maintained by Gordon Watts

Jet Recombination

Link to the Jet Recombination page maintained by Greg Landsberg

New MC Signal and Background Ntuples

Scalar LQ MC samples.

A bug was found in the latest MC files due to a wrong RECO RCP parameters used in the GEANT data processing. Therefore, these new files are not usable. The Ntuples were made from the old files (2000 events per mass bin) and they are located in:

NEW_PHENOM_1$HROOT:[GREG.LQMC]
LQ160.NTP
LQ170.NTP
LQ180.NTP
LQ200.NTP
LQ250.NTP

An additional Ntuple with ISAJET information saved was produced for the LQ mass of 200 GeV:

NEW_PHENOM_1$HROOT:[GREG.LQMC]LQ200_ISAJET.NTP

I have also produced one Ntuple with jet RMS corrections turned off (not very useful for the analysis: just a cross-check) and it is in:

NEW_PHENOM_1$HROOT:[GREG.LQMC]LQ200_NORMS.NTP

Drell-Yan MC Ntuples

These Ntuples for the different sqrt(s)-ranges can be found in:

NEW_PHENOM_6$HROOT:[GREG.DYMC]
DY20-60.NTP
DY60-120.NTP
DY120-250.NTP
DY250-500.NTP

I have also copied them on d0cha:

d0cha://prj_root/714/new_1/dymc/dy*.ntp

QCD Data Ntuples

These Ntuples were created from the JET_3_MON trigger using the entire Run Ib statistics and have the requirement of 3 jets in the event with the leading jet ET above 20 GeV and the other two jets above 15 GeV. They are currently in my temporary area on D0TNG (there is not enough space on project disks!):

TMP$ROOT332:[LANDSBERG.LQ]
QCD_1.NTP
QCD_2.NTP
QCD_3.NTP
QCD_4.NTP

(four partitions corresponding to different run range of Run Ib; combine them all to obtain full statistics). I have also copied them to d0cha disk:

d0cha://prj_root/714/new_1/qcd/qcd_?.ntp

Fake EM Data Ntuples

These Ntuples were created from the JET_3_MON trigger using the entire Run Ib statistics and have the requirement of 2 jets in the event with the ET above 15 GeV and an additional EM object with the ET > 20 GeV. They are currently in my temporary directory on Alpha cluster:

TMP$ROOT332:[LANDSBERG.LQ]
FAKE_1.NTP
FAKE_2.NTP
FAKE_3.NTP
FAKE_4.NTP

(four partitions corresponding to different run range of Run Ib; combine them all to obtain full statistics). Use QCD Ntuples (described above) for normalization purposes when calculating jet faking EM objects probability. I have also copied them to d0cha disk:

d0cha://prj_root/714/new_1/qcd/fake_?.ntp

Top->(dileptons) Ntuples

These Ntuples were produced from the top group dilepton MC sample (PRJ$ROOT240:[TOP15.MC.HERWIG_TTBAR.TTLL170]TOP_TTLL170XS_HW057_G315TM3_*.X_UDST*) for GeV top mass. At the Ntuple creation time I required two EM clusters with ET > 20 GeV and two additional jets above 15 GeV The Ntuples can be found in:

NEW_PHENOM_1$HROOT:[GREG.TOP]
TOP_LL170_A.NTP
TOP_LL170_B.NTP
TOP_LL170_C.NTP
TOP_LL170_D.NTP
TOP_LL170_E.NTP
TOP_LL170_F.NTP
TOP_LL170_G.NTP
TOP_LL170_H.NTP
TOP_LL170_I.NTP
TOP_LL170_J.NTP

(10 partitions corresponding to different input partitions).
Last updated May 1, 1997 by Greg Landsberg