μ̃ and ẽ and Analysis Status Outline μ̃ and ẽ Production Status
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Transcript of μ̃ and ẽ and Analysis Status Outline μ̃ and ẽ Production Status
J-J.Blaising, 18 April 2011 1LCD WG6 meeting
μ� and e and Analysis Status
Outline
• μ� and e Production Status• Efficiency and Momentum resolution, without γγ->h • Efficiency and Momentum resolution with overlay, 10 K μ� and e used for first tests.• Summary
J-J.Blaising
Benchmark Production Statusμ�
J-J.Blaising, 18 April 2011 2LCD WG6 meeting
Process σx Brfb
Eventsgenerated
Lfb⁻¹
EventsPre-sel
MokkaMarlin
e⁻ e⁺-> ⁻ μ� μ�⁺ 0.7 5. 0x10⁴ 70000 49980 Y/Y
SUSY-μ�⁻ ⁺μ� 2.3 2.0x10⁵ 3600 8200 Y/Y
e⁻ e⁺-> μ⁻ μ⁺ 0.6 9 .0x10⁵ 10600 6745 Y/Y
e⁻ e⁺-> μ⁻ μ⁺ ν� eνe 3.5 9.0x10⁵ 13700 48500 Y/Y
e⁻ e⁺-> μ⁻ μ⁺ μν� νμ
2.2 1.0x10⁵ 16000 35000 Y/Y
e⁻ e⁺-> W⁻ W⁺ ν� ν 2.3 1.0x 10⁵ 4800 264 Y/Y
e⁻ e⁺-> Z⁻ Z⁺ ν� ν 0.002 1.0x10⁵ 1800 5 Not needed
γγ -> μ¯μ⁺ 1.0x10⁵ 0 Not needed
2.45x10⁶ 150 000
All events produced without overlay; DST 150k; 600 MB 20K events produced with overlay; 100 evts/job; 7h; v0111Prod;μ�60MB/job; 130 k to produce if we would decide to overlay all events
e Benchmark Production Status
J-J.Blaising, 18 April 2011 3LCD WG6 meeting
Process σx Brfb
Eventsgenerated
Lfb⁻¹
EventsPre-sel
MokkaMarlin
e⁻ e⁺-> e⁻ e⁺ 6 2.0x 10⁴ 3300 19990 Y/Y
SUSY-e⁻ e 2.3 2.0x 10⁵ 3600 8200 Y/Y
e⁻ e⁺-> e⁻ e⁺ 80 6.0x 10⁶ 870 74000 Y/Y
e⁻ e⁺-> e⁻ e⁺ ν� ν 90 2. 0x10⁵ 1100 100000 Y/Y
e⁻ e⁺-> W⁻ W⁺ ν� ν 2.3 1.0x 10⁵ 4800 264 Y/Y
e⁻ e⁺-> Z⁻ Z⁺ ν� ν 0.002 1.0x10⁵ 1800 5 Not needed
6.6x10⁶ 200 000
All events produced without overlay 20K e events produced with overlay; 100 evts/job; 13h; 60 MB180 k to produce if we would decide to overlay all events
Efficiency and Momentum ResolutionDefinitions
J-J.Blaising, 18 April 2011 4LCD WG6 meeting
• 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 e 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
and e: dN/dP No Overlayμ�
J-J.Blaising, 18 April 2011 5LCD WG6 meeting
-μ:Efficiency ~ 99.7 %; No P dependence (~No Bremsstrahlung) -e:Efficiency ~ 98.6 %; P dependence ( Bremsstrahlung)
and e: dN/dPv, No Overlayμ�
J-J.Blaising, 18 April 2011 6LCD WG6 meeting
-μ: with FSR correction; no P dependence -e: with FSR and Bremsstrahlung correction; some inefficiency at high P (improve?)
and e: dN/dμ� θ No Overlay
J-J.Blaising, 18 April 2011 7LCD WG6 meeting
-μ: No θ dependence; s channel only -e: No θ dependence; s and t channel; more events in F/B regions
μ�:dN/(δP/P*P) and dN/(δPv/Pv*Pv)
J-J.Blaising, 18 April 2011 8LCD WG6 meeting
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 parametrizationK~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
e: dN/(δP/P*P) and dN/(δPv/Pv*Pv)
J-J.Blaising, 18 April 2011 9LCD WG6 meeting
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.
Discriminating Variables
J-J.Blaising, 18 April 201110LCD WG6 meeting
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 e
e: Signal/Background No Overlay
J-J.Blaising, 18 April 201111LCD WG6 meeting
Visible Energy
Acoplanarity
Good agreement between generated/reconstructed variables.
Invariant Mass
Pt VectorSum
μ�: dN/dP, dn/dθ with Overlay
J-J.Blaising, 18 April 201112LCD WG6 meeting
Ε 99.7 ↘ 99.2% ; Tracks exist, PFO not built, mainly in F/B regions
e: dN/dP, dn/dθ with Overlay
J-J.Blaising, 18 April 201113LCD WG6 meeting
Ε 98.6 ↘ 98.0% ; P dependence (Bremsstrahlung);
μ� dn/dPv, dn/dθv with Overlay
J-J.Blaising, 18 April 201114LCD WG6 meeting
FSR E correction, no P dependence
e dn/dPv, dn/dθv with Overlay
J-J.Blaising, 18 April 201115LCD WG6 meeting
FSR ,brems E correction; inefficiency over full range, to investigate at high P; already present without γγ
μ� dN/(δP/P*P) and dN/(δPv/Pv*Pv)Without (top)/with Overlay(bottom)
J-J.Blaising, 18 April 2011 16LCD WG6 meeting
Left : δP/P*P : 2.0 ↗ 2.2x10¯⁵; ~ no tail, un/overflow: 0.4 10¯³ ↗ 1.6 10¯³Right: δPv/Pv*Pv: 2.5 ↗ 2.7x10¯⁵; small tail, un/overflow: 5 10¯³ ↗ 8 10¯³
e dN/(δP/P*P) and dN/(δPv/Pv*Pv)Without (top)/with Overlay(bottom)
J-J.Blaising, 18 April 2011 17LCD WG6 meeting
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 %
Summary
J-J.Blaising, 18 April 201118LCD WG6 meeting
With γγ -> h background overlay:•For μ� : ε 99.7 ↘ 99.2% inefficiency small, mainly located in F/B regions Tracks are present; PFO’s are not built (Track quality ?). For without and with overlay the momentum resolution μ� obtained after full reconstruction is similar: δPv/Pv² ~ 2x10¯⁵ . The shape of the discriminating variables is not significantly affected. • For e : 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, present can 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
J-J.Blaising, 18 April 2011
Generators Cuts
J-J.Blaising, 18 April 2011 20LCD WG6 meeting
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