J-J.Blaising, 21 December 2010 1LCD WG6 meeting

Sleptons Analysis Plan

There are two susy benchmark points:

•Squarks and heavy highs (sqhh) •Charginos and neutralinos (chne)

Selectrons and smuons were generated with whizard for both points.

J-J.Blaising

e¯e⁺->e¯e⁺ :σL=8 fb, σR=25fb (sqhh)

J-J.Blaising, 21 December 2010 2LCD WG6 meeting

meL= 696 GeV; mχ₁° =340GeV; meL and mχ₁° can be measured from dN/dP meR=423 GeV; lower bound of dN/dP to close to 0R polarization of beam decreases W bkg, but decrease also σ(eL) and Increase σ(eR) => e measurement not possible at 3 Tev for point sqhh

e¯e⁺->e¯e⁺ :σL=3 fb, σR=6fb (chne)

J-J.Blaising, 21 December 2010 3LCD WG6 meeting

meL= 1100 GeV; BR(eL->e+ χ₁° )=0.16 BR(eL-> ₁±χ� + ν)=0.84 meR= 1010 GeV; lower bound of dN/dP not close to 0R polarization of beam decreases W bkg, decrease σ(eL)=1.3 fb and increase σ(eR) = 9fb => eR measurement possible at 3 Tev for point chne

Background:e¯e⁺->e¯e⁺:σ=1.7x10⁷ fb

J-J.Blaising, 21 December 2010 4LCD WG6 meeting

Background for selectron studies; A cut 5⁰ <θ < 175 ⁰ and PT> 10 GeV reduces the bkg to 2x10⁴,

dN/dEvis dN/dθ(e±)

Background:e¯e⁺->e¯e⁺:σ=1.7x10⁷ fb

J-J.Blaising, 21 December 2010 5LCD WG6 meeting

A cut on PT12 and ACOP will reduce the cross section by a factor 20 down to~ 10³ fb. The efficiency for the signal is 97%.

Background:e¯e⁺->e¯e⁺νeνe:σ=993 fb

J-J.Blaising, 21 December 2010 6LCD WG6 meeting

Includes ZZ, ZW, WW, Zgamma, Wgamma processesWhizard cuts 5⁰ <θ (L)< 175 ⁰ and Pt(L) > 10 => σ=313 fbPT12>20 and ACOP > 4 cut, rejects 259/500; negligible Invariant mass cut will be applied at analysis level

Summary

J-J.Blaising, 21 December 2010 7LCD WG6 meeting

sleptons and charginos and S.M generation with whizard is ok σ(susy)=46.4 fb Event generation cuts for selectrons , SUSY and SM background: 5⁰ <θ (L)< 175 ⁰ and Pt(L) > 10 (in whizard)PT12>20 and ACOP > 4 (after whizard at generator level)σ(eR) = 6fb, for POL0, studies can be done with L=500 fb¯¹ => 3000 events Generate 30000 events, 60 jobs σ(e1e1) =1000 fb with cuts => for L=500 fb¯¹, => 500000 events, 1000 Jobs σ(e1e1n1n1)= 313fb with cuts => for L=500 fb¯¹, => 160000 events, 313 Jobs σ(ww-n1n1)xBR=1.1 fb and σ(zz-n1n1) xBR=0.2 fb ; generate 10000, 20 jobs σ(susy) with cuts = 13 fb ; => 6500 events; generate 65000, 130 jobs 1530 jobs Simulation time: xx secs/eventReco time ? ; With these cuts, no χχ->hadron overlay needed ? (check)Different cuts will be applied for smuons; to be finalized.

Summary

J-J.Blaising, 21 December 2010 8LCD WG6 meeting

sleptons and charginos and S.M generation with whizard is ok σ(susy)=46.4 fb Event generation cuts for smuons , SUSY and SM background: 5⁰ <θ (L)< 175 ⁰ and Pt(L) > 10 (in whizard)PT12>20 and ACOP > 4 (after whizard at generator level)σ( R) = 0.7fb, for POL0, studies require L=2000 fb¯¹ => 1400 eventsμ� Generate 15000 events, 30 jobs σ(e2e2) =333 fb; 4.5 fb withcuts => for L=2000 fb¯¹, => 10000 events, 20Jobs σ(e2e2n1n1)= 132fb withou cuts => for L=2000 fb¯¹, => x events, y Jobs σ(e2n2n2e2)=15.2fb without cuts => σ(ww-n1n1)xBR=1.1 fb and σ(zz-n1n1) xBR=0.2 fb ; generate 10000, 20 jobs σ(susy) with cuts = 13 fb ; => 6500 events; generate 65000, 130 jobs 1530 jobs Simulation time: xx secs/eventDifferent cuts will be applied for smuons; to be finalized.