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ATGC study in ZmumuGamma channel. L. Han, L.HE, Suen.H , M.Liu , H.Song IPAS &USTC. Purpose: Test binning and gamma pT cut region. Generation of ATGC samples- BAUR NLO. Use H30( ϒ ) for an example.

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Atgc study in zmumugamma channel

ATGC study in ZmumuGamma channel

L. Han, L.HE, Suen.H, M.Liu, H.Song

IPAS&USTC

IPAS&USTC


Generation of atgc samples baur nlo

Purpose: Test binning and gamma pT cut region

Generation of ATGC samples- BAUR NLO

Use H30(ϒ) for an example

  • With BAUR NLO package, we generate 61 sample with H30(ϒ) from -0.03 – 0.03 with step 0.001

    • pt(γ) > 45GeV, |η(ϒ)|<2.37 ;

    • pt(l) > 25GeV, |η(l)|<2.47 ;

    • pt(jet)>20GeV, |η(jet)|<3.0 ;

    • dR(l,ϒ) > 0.7 ;

    • M(llϒ)>100GeV;

    •  =2TeV

    • efract =0.5

    • used pdf: cteq6m

  • Data: period D-H(~ 1 fb-1)

    • using tag p605

    • use exactly the same event selection except:

      pt_gamma >45GeV

      M(μμϒ)>100GeV

IPAS&USTC


Atgc plots
ATGC plots

Purpose: Test binning and gamma pT cut region

Has ATGC contribution when H30 is large

60GeV

IPAS&USTC


Extract atgc parameters h30g
Extract ATGC parameters-H30G

Purpose: Test binning and gamma pT cut region

1. Binning: 45-55, 55-65,65-75,75-100,100-500

Use Minus LogLikelihood bin-by-bin fitting

Vtot: expected events

ni: observed events in ith bin

60

SM BAUR Sample Vs. data(83events)

-0.014<h30(G)<0.014

90% CL

-Log(L) Value of 61 sets

Normalize MC’s 1st bin to data

IPAS&USTC


Extract atgc parameters h30g1
Extract ATGC parameters-H30G

Purpose: Test binning and gamma pT cut region

1. Binning: 60-500

Use Minus LogLikelihood bin-by-bin fitting

Help our normalization

SM BAUR Sample Vs. data(83events)

-0.024<h30(G)<0.024

90% CL

60GeV

-Log(L) Value of 61 sets

Just use >60GeV 1 bin

Same normalization method with slide 4

IPAS&USTC


Purpose: Test binning and gamma pT cut region

Principle the binning should have little effect on our result, but it seems the result is affected any how

just use high pt region make our result worse?

IPAS&USTC


Back up
Back up

1. Binning: 45-55,55-60,60-500

-0.024<h30(G)<0.024

90% CL

IPAS&USTC


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