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μ̃ and ẽ and Analysis Status Outline μ̃ and ẽ Production Status PowerPoint PPT Presentation


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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.

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

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And e and analysis status outline and e production status

  • 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


Benchmark production status

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


E benchmark production status

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


Efficiency and momentum resolution definitions

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


And e dn dp no overlay

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


And e dn dpv no overlay

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


And e dn d no overlay

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


Dn p p p and dn pv pv pv

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


E dn p p p and dn pv pv pv

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


Discriminating variables

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


E signal background no overlay

ẽ: Signal/Background No Overlay

Visible Energy

Invariant Mass

Acoplanarity

Pt VectorSum

Good agreement between generated/reconstructed variables.

LCD WG6 meeting


Dn dp dn d with overlay

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


E dn dp dn d with overlay

ẽ: dN/dP, dn/dθ with Overlay

Ε 98.6 ↘ 98.0% ; P dependence (Bremsstrahlung);

LCD WG6 meeting


Dn dpv dn d v with overlay

μ̃dn/dPv, dn/dθv with Overlay

FSR E correction, no P dependence

LCD WG6 meeting


E dn dpv dn d v with overlay

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


Dn p p p and dn pv pv pv without top with overlay bottom

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


E dn p p p and dn pv pv pv without top with overlay bottom

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


Summary

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


Backup slides

Backup Slides

LCD WG6 meeting


Generators cuts

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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