W 1WZ 0 in Higgsless Model Zhenxia Zhang

W± 1→W±Z 0 in Higgsless Model Zhenxia Zhang 2009. 05. 04

pp→W± 1 qq→W±Z 0 qq→l+l-jjjj

Background : at 100 fb-1

Selection criteria 1). 2 lepton: 2). 4 jets: pt>15 Ge. V, |η|<2. 5 , opposite charge pt>15 Ge. V, |η|<4. 5 , δR (j, l)>0. 3 if N j >4, keep 4 jets with larger pt. 3). |Ml+l--91. 18|<10 Ge. V 4) Reconstruct W± : |Mjj-80. 398|<20 Ge. V two jets satisfy: |η|<2. 0; Pt/P>0. 3; |η 1 - η 2 |<1. 5 ; |pt 1 -pt 2|<250 Ge. V 5) forward jets satisfy: 6) |η|>1. 0; Pt/P<0. 3; |η 1 - η 2 |>3. 0 ; invariant mass>400 Ge. V

Bg is normalized to real event num; signal is multiplied by 10 6) Max Pt of jets>100 Ge. V 7) Sum Pt of 4 jets>300 Ge. V 8) Sum Pt of 2 lepton >160 Ge. V

Efficiency of cut flow

Event number of bg in every energy regions. Event num zj zjj z 3 j z 4 j wzjj other Total events of bg 450 Ge. V 915 1582 5073 173 813 … 8556 500 Ge. V 915 1582 4396 203 707 7803 550 Ge. V 582 1582 3627 162 535 6488 600 Ge. V 666 1285 3139 112 394 5596 650 Ge. V 582 692 2865 92 273 4504 700 Ge. V 499 494 2130 102 206 3431 750 Ge. V 250 297 1428 61 155 2191 800 Ge. V 0 198 1155 10 115 1478

Invariant mass of W±Z 0

Result table:

Sys error: For bg: uncertainty of cross section: 20% For signal: uncertainty of cross section: Signal( Ge. V) 450 500 550 600 650 700 750 800 Error( %) 25. 09 18. 40 13. 35 13. 30 23. 52 20. 36 4. 84 6. 36

Generate one sample close to our signal: pp→Hqq→Z 0 Z 0 qq→l+l-jjjj , Mass of Higgs: 700 Ge. V Jets coming from Z 0 η |Pt 1 -Pt 2| |η 1 -η 2| Pt/P

Two forward jets η |η 1 -η 2| Invariant mass of two forward jets Pt/P