Optimized Search for the First Generation LeptoQuarks(enujj)

Optimized Search for the First Generation LeptoQuarks(enujj)

This analysis is an effort to increase our sensitivity to the search of high mass leptoquarks in the enujj channel by employing Random Grid Search and multivariate techniques.

New data Ntuples

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

New column-wise ntuples were made for the optimized analysis by Greg Landsberg. Reduced row-wise ntuples (RWNs) are being made by Dan Karmgard and Pushpa Bhat. Following triggers were used for data ntuples Details about the MC and data samples and RWNs:
Column-wise Ntuples:
All of them are also available on dafm04::tmp$root355:[pushpa.dan.enujj.ntuples]

          I.    Available files (Number of Events)

            1)  In PRJ$ROOT215:[NEW_PHENOM_1.GREG.EVJJ]
              a) LQ160.NTP                      (1999)
                 LQ180.NTP                      (1999)
                 LQ200.NTP                      (1999)
                 LQ220.NTP                      (4996)
                 NEWNT_1A_1.NTP                 (2831)
                 NEWNT_1B_1.NTP                 (3073)
                 NEWNT_1B_2.NTP                 ()
                 NEWNT_1B_3.NTP                 ()
                 NEWNT_1B_4.NTP                 ()
                 * Ntuples with no events listed were recovered, and will be
                   written to this directory shortly.

            2) In prj$root261:[new_phenom_6.greg.top_jets]

              a) TOP_LJ170_A.NTP                (4996)
                 TOP_LJ170_B.NTP                (5094)
                 TOP_LJ170_C.NTP                (4950)
                 TOP_LJ170_D.NTP                (4906)
                 TOP_LJ170_E.NTP                (4913)
                 TOP_LJ170_F.NTP                (4924)
                 TOP_LJ170_G.NTP                (5044)
                 TOP_LJ170_H.NTP                (4954)
                 TOP_LJ170_I.NTP                (4998)
                 TOP_LJ170_J.NTP                (4950)

            3) In prj$root261:[new_phenom_6.greg.top_leptons]
              a) TOP_LL170_A.NTP                (13527)
                 TOP_LL170_B.NTP                (13791)
                 TOP_LL170_C.NTP                (13232)
                 TOP_LL170_D.NTP                (13356)
                 TOP_LL170_E.NTP                (13329)
                 TOP_LL170_F.NTP                (8966)
                 TOP_LL170_G.NTP                (8894)
                 TOP_LL170_H.NTP                (7609)
                 TOP_LL170_I.NTP                (9150)
                 TOP_LL170_J.NTP                (9280)

            4) In prj$root261:[new_phenom_6.greg.wjj]
              a) WJJ_1.NTP                      (1390)
                 WJJ_2.NTP                      (21191)

        II. Row wise Ntuples (Made from Gregs' columnwise sets) for RG
              Search and Neural Networks are on the Alpha cluster in
              TMP$ROOT355:[PUSHPA.DAN.ENUJJ.NTUPLES]

            A) Available Files (Number of Events)
              1) LQEV_160.RWN                   (865)
                 LQEV_180.RWN                   (898)
                 LQEV_200.RWN                   (937)
                 LQEV_220.RWN                   (2396)
                 DATA_1A.RWN                    (198)
                 DATA_1B.RWN                    (305)
                 TOP_LJ_MT170.RWN               (22251)
                 TOP_LL_MT170.RWN               (52428)
                 WJJ.RWN                        (10050)

            B) Cuts applied to Gregs' ntuples to make the RWN.
              1)  Bad Run Veto (Data and QCD only)
              2)  NMu = 0 OR (NMu > 0 AND Mu_OK = 0) for each Muon
              3)  Missing ET > 20
              4)  Revertexing information available
              5)  One EM object with
                a) ET > 20
                b) |Eta| < 2.5 but
                c) not 1.1 < |Eta| < 1.5
              6)  Electron ID Cuts (data only)
                a) 5 Variable likelihood < 1.0
                b) chi squared < 100
                c) isolation < 0.15
              7)  2 through 5 Jets in the event with
                a) Jet EMF < 0.95
                b) |Eta| < 2.5
                c) ET > 15
                d) ej Cone > 0.2
              8)  Missing ET seperated from the two leading jets by at least
                  0.25 in phi.  0.25 < |dPhi| < PI-0.25

  Monte Carlo Generation


        III.      Guoliangs' Ntuples are located on the Alpha Cluster in
                PRJ$ROOT341:[NEW_PHENOM_6.SCRATCH.WANGGL.MC_CWN]
          A.    Files Available (Number of Events) (Cross Section) (BR)

            1)  LQNUE_40.CWN                    (2000)  (819)
                LQNUE_60.CWN                    (1999)  (111)
                LQNUE_80.CWN                    (1999)  (24.7)
                LQNUE_100.CWN                   (2000)  (7.38)
                LQNUE_120.CWN                   (2000)  (2.65)
                LQNUE_130.CWN                   (2000)  (1.67)
                LQNUE_140.CWN                   (1999)  (1.08)
                LQNUE_150.CWN                   (1999)  (0.711)
                LQNUE_160.CWN                   (1999)  (0.79300)*
                LQNUE_180.CWN                   (1999)  (0.37319)*
                LQNUE_200.CWN                   (1999)  (0.18420)*
                LQNUE_220.CWN                   (4996)  (0.09320)*
                LQNUE_240.CWN                   (4997)  (0.04853)*
                LQNUE_250.CWN                   (1998)  (0.03529)*

                * => NLO Cross Section.

            2)  TOP_LJETS170T_HW057_01.CWN  +
                TOP_LJETS170T_HW057_02.CWN      (82244) (5.77)          (0.454)
                TOP_TTLL170XS_HW057_01.CWN  +
                TOP_TTLL170XS_HW057_02.CWN      (101339) (5.77)         (0.0685)
                W2L80AJHE_VB300_G315TZ3_01.CWN  +
                W2L80AJHE_VB300_G315TZ3_01.CWN  +
                W2L80AJHE_VB300_G315TZ3_01.CWN  +
                W2L80AJHE_VB300_G315TZ3_01.CWN  (345296) (810.7)        (1)


          B. Guoliangs' Cuts for the standard analysis.
            1) ZVertex1 < 50
            2) Missing ET > 40
            3) Muon exclusion
            4) 1 Electron with
              a) ET > 25
              b) |Eta| < 1.2
            5) 2 Jets with
              a) ET > 25
              b) |Eta| < 1.0
              c) Third jet allowed with ET > 25 and |Eta| < 2.5
            6) Electron seperated from all jets by dR > 0.25
            7) Electron ID cuts on data only
              a) 4 Variable likelihood < 0.25
              b) Electron isolation < 0.10
            8)  Missing ET seperated from all jet axes by 0.25
            9)  HT = Sum(Jet ET) + Electron ET
           10)  Transverse mass of electron neutrino pair > 100
           11)  dM/M (Hobbs variable) < 0.2



New Data Analysis

Parameters of the 3 candidates from optimization with lq160
Parameters of the 2 new candidates (132-column text file)

Results


Problems and Bugs


RG/NN search

2 variable (ST, dm180) NN distributions
2-D plots for base cuts
2-D plots for final cuts NN
Mtenu.gt.100 GeV/c**2, Met.gt.30 GeV and nn.gt.0.85

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
Last updated July 1, 1997 by Pushpa Bhat