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μ̃ and ẽ and Analysis Status Outline μ̃ and ẽ Production Status

μ̃ and ẽ and Analysis Status Outline μ̃ and ẽ Production Status Efficiency and Momentum resolution, without γγ ->h Efficiency and Momentum resolution with overlay, 10 K μ̃ and ẽ used for first tests. Summary J- J.Blaising. μ̃ Benchmark Production Status.

nathan-wilkerson
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μ̃ and ẽ and Analysis Status Outline μ̃ and ẽ Production Status

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  1. μ̃ and ẽ and Analysis Status • Outline • μ̃and ẽ Production Status • Efficiency and Momentum resolution, without γγ->h • Efficiency and Momentum resolution with overlay, • 10 K μ̃ and ẽ used for first tests. • Summary • J-J.Blaising LCD WG6 meeting

  2. μ̃ Benchmark Production Status All events produced without overlay; DST 150k; 600 MB 20K μ̃ events produced with overlay; 100 evts/job; 7h; v0111Prod; 60MB/job; 130 k to produce if we would decide to overlay all events LCD WG6 meeting

  3. ẽ Benchmark Production Status All events produced without overlay 20K ẽ events produced with overlay; 100 evts/job; 13h; 60 MB 180 k to produce if we would decide to overlay all events LCD WG6 meeting

  4. Efficiency and Momentum ResolutionDefinitions • Reconstruction Efficiency: ε • ε = Nevt (2 good reconstructed L) /Nevt (2 generated L) • Good L : RPFO matching in space and ID the TPFO (McParticle) • Momentum Resolution: • δP(L) /P(L)*P(L) ;P(L) = Lepton momentum after FSR or • bremsstrahlung; δP = P(generated)-P(reconstructed) • FSR/Bremsstrahlung E correction when Eγ > 3x2 10¯⁵xP² (new • since 01.04 meeting, essential for ẽ and against γγ background) • photons or e-,e+ pairs are combined with the closest lepton; • δPv(Lv) /P(Lv)*P(Lv) ; P(Lv) = Lepton momentum at Vertex • δPv = P(generated)v-P(reconstructed) • Without FSR or Bremsstrahlung correction δPv asymmetric tail LCD WG6 meeting

  5. μ̃ and ẽ: dN/dP No Overlay -μ:Efficiency ~ 99.7 %; No P dependence (~No Bremsstrahlung) -e:Efficiency ~ 98.6 %; P dependence ( Bremsstrahlung) LCD WG6 meeting

  6. μ̃ and ẽ: dN/dPv, No Overlay -μ: with FSR correction; no P dependence -e: with FSR and Bremsstrahlung correction; some inefficiency at high P (improve?) LCD WG6 meeting

  7. μ̃ and ẽ: dN/dθ No Overlay -μ: No θ dependence; s channel only -e: No θ dependence; s and t channel; more events in F/B regions LCD WG6 meeting

  8. μ̃:dN/(δP/P*P) and dN/(δPv/Pv*Pv) δP/P*P = 2.0x10¯⁵ δPv/Pv*Pv = 2.5x10¯⁵ (two sides tail; un/overflow, ~0.5 % ) δP/P*P = ΔX √ (K /N+4) /(0.3 BL² sinθ ) PDG parametrization K~720, B=4, L= F1(θ) , N=F2(θ) ΔX~50.10¯⁶ m Parametrization can be used for the momentum distribution fit . Momentum resolution in agreement with the assumption made for the work done at generator level LCD WG6 meeting

  9. ẽ: dN/(δP/P*P) and dN/(δPv/Pv*Pv) δP/P*P ~ 4.2x10¯⁵ (No E correction right side tail,12 % overflow Bremsstrahlung) δPv/Pv*Pv~ 5.6x10¯⁵ (E correction: two sides tail, 2.0 % underflow and 3.0 % overflow ) Replace parametrization by a fit. LCD WG6 meeting

  10. Discriminating Variables E(L1)1+E(L1) Visible energy, without neutral energy Pt(L1) + Pt(L2) Pt Vector Sum Pt(L1) + Pt(L2) Pt Algebric Sum M(L1,L2) Invariant mass of the lepton pair Beta(L1,L2) β of the lepton pair Theta(L1,L2) Polar angle of Missing momentum vector Acollinearity of the lepton pair Acoplanarity of the lepton pair Δ = | E(L1) –E(L2) | / E(L1) + E(L2) ; energy imbalance A few plots for ẽ LCD WG6 meeting

  11. ẽ: Signal/Background No Overlay Visible Energy Invariant Mass Acoplanarity Pt VectorSum Good agreement between generated/reconstructed variables. LCD WG6 meeting

  12. μ̃: dN/dP, dn/dθ with Overlay Ε 99.7 ↘ 99.2% ; Tracks exist, PFO not built, mainly in F/B regions LCD WG6 meeting

  13. ẽ: dN/dP, dn/dθ with Overlay Ε 98.6 ↘ 98.0% ; P dependence (Bremsstrahlung); LCD WG6 meeting

  14. μ̃dn/dPv, dn/dθv with Overlay FSR E correction, no P dependence LCD WG6 meeting

  15. ẽ dn/dPv, dn/dθv with Overlay FSR ,brems E correction; inefficiency over full range, to investigate at high P; already present without γγ LCD WG6 meeting

  16. μ̃dN/(δP/P*P) and dN/(δPv/Pv*Pv)Without (top)/with Overlay(bottom) Left : δP/P*P : 2.0 ↗ 2.2x10¯⁵; ~ no tail, un/overflow: 0.4 10¯³ ↗ 1.6 10¯³ Right: δPv/Pv*Pv: 2.5 ↗ 2.7x10¯⁵; small tail, un/overflow: 5 10¯³ ↗ 8 10¯³ LCD WG6 meeting

  17. ẽ dN/(δP/P*P) and dN/(δPv/Pv*Pv)Without (top)/with Overlay(bottom) Left : δP/P*P : 4.2 ↗ 4.3x10¯⁵; right side tail, overflow: 12 % Right: δPv/Pv*Pv: 5.6 ↗ 5.7x10¯⁵; two sides tail, overflow: 2.3 ↗ 4.8 % LCD WG6 meeting

  18. Summary • With γγ -> h background overlay: • For μ̃ : ε 99.7 ↘99.2% • inefficiency small, mainly located in F/B regions • Tracks are present; PFO’s are not built (Track quality ?). • For μ̃ without and with overlay the momentum resolution • obtained after full reconstruction is similar: δPv/Pv² ~ 2x10¯⁵ . • The shape of the discriminating variables is not significantly • affected. • For ẽ : ε 98.6 ↘ ~ 98.0% • after E correction δPv/Pv² to ~ 6x10¯⁵, residual tails 2% ↗~ 5% , • Additional work needed to see whether the high P inefficiency, • presentcan be reduced. • Disk space needed for fast access to DSTs • Overlay SM Background ? Check CPU Time for jobs of 500 events. LCD WG6 meeting

  19. Backup Slides LCD WG6 meeting

  20. Generators Cuts • Stdhep files produced with Whizard • Selection cuts were used to produce background events: • Same cuts applied on signal after reconstruction. • Whizard cuts: • 10° < Θ(L) < 170° • Pt(L) > 4 GeV • Post whizard cuts: • Evis < 2.5 TeV • 4° < ΔΦ(L,L) < 176° • Pt(L,L) > 10 GeV • M(L,L) > 100 GeV LCD WG6 meeting

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