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Comprehensive Analysis of Slepton and Chargino Production in SUSY Benchmarks

This report presents a detailed analysis of selectron and smuon production within the two SUSY benchmark points: squarks and heavy Higgs (sqhh), and charginos and neutralinos (chne). The generation of events utilizing WHIZARD indicates specific background and signal efficiencies under various conditions. Results show differing cross sections based on polarization and cuts applied. Focused studies reveal the feasibility of measurements at certain energies, highlighting challenges and conditions for precision studies in the search for supersymmetry in e⁻e⁺ collisions.

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Comprehensive Analysis of Slepton and Chargino Production in SUSY Benchmarks

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  1. 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 LCD WG6 meeting

  2. e¯e⁺->ẽ¯ẽ⁺ :σL=8 fb, σR=25fb (sqhh) mẽL= 696 GeV; mχ₁° =340GeV; mẽL and mχ₁° can be measured from dN/dP mẽR=423 GeV; lower bound of dN/dP to close to 0 R polarization of beam decreases W bkg, but decrease also σ(ẽL) and Increase σ(ẽR) => ẽ measurement not possible at 3 Tev for point sqhh LCD WG6 meeting

  3. e¯e⁺->ẽ¯ẽ⁺ :σL=3 fb, σR=6fb (chne) mẽL= 1100 GeV; BR(ẽL->e+ χ₁° )=0.16 BR(ẽL->χ̃₁±+ ν)=0.84 mẽR= 1010 GeV; lower bound of dN/dP not close to 0 R polarization of beam decreases W bkg, decrease σ(ẽL)=1.3 fband increase σ(ẽR) = 9fb => ẽR measurement possible at 3 Tev for point chne LCD WG6 meeting

  4. Background:e¯e⁺->e¯e⁺:σ=1.7x10⁷ fb dN/dEvis dN/dθ(e±) Background for selectron studies; A cut 5⁰ <θ < 175 ⁰ and PT> 10 GeV reduces the bkg to 2x10⁴, LCD WG6 meeting

  5. Background:e¯e⁺->e¯e⁺:σ=1.7x10⁷ fb 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%. LCD WG6 meeting

  6. Background:e¯e⁺->e¯e⁺νeνe:σ=993 fb Includes ZZ, ZW, WW, Zgamma, Wgamma processes Whizard cuts 5⁰ <θ (L)< 175 ⁰ and Pt(L) > 10 => σ=313 fb PT12>20 and ACOP > 4 cut, rejects 259/500; negligible Invariant mass cut will be applied at analysis level LCD WG6 meeting

  7. Summary sleptonsand charginos and S.M generation with whizardis ok σ(susy)=46.4 fb Event generation cuts for selectrons , SUSY and SM background: 5⁰ <θ(L)< 175 ⁰and Pt(L) > 10 (in whizard) PT12>20 and ACOP > 4 (after whizard at generator level) σ(ẽR) = 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/event Reco time ? ; With these cuts, no χχ->hadron overlay needed ? (check) Differentcuts willbe applied for smuons; to be finalized. LCD WG6 meeting

  8. Summary sleptonsand charginos and S.M generation with whizardis ok σ(susy)=46.4 fb Event generation cuts for smuons , SUSY and SM background: 5⁰ <θ(L)< 175 ⁰and Pt(L) > 10 (in whizard) PT12>20 and ACOP > 4 (after whizard at generator level) σ(μ̃R) = 0.7fb, for POL0, studies require L=2000 fb¯¹ => 1400 events Generate 15000 events, 30 jobs σ(e2e2) =333 fb; 4.5 fbwithcuts => for L=2000 fb¯¹, => 10000 events, 20Jobs σ(e2e2n1n1)= 132fb withou cuts => for L=2000 fb¯¹, => xevents, 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/event Differentcuts willbe applied for smuons; to be finalized. LCD WG6 meeting

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