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μ̃, ẽ and ν̃ Benchmark Status 1.4 TeV. μ̃, ẽ and ν̃ Production Status ν̃ performance plots Discriminating variables, S+B plots, mass determination, fit results, assuming L=2 ab¯¹. μ̃ Benchmark Production Status. 50000 μ̃ produced with γγ -> h overlaid.

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  • μ̃, ẽ and ν̃Production Status

  • ν̃ performance plots

  • Discriminating variables, S+B plots, mass determination, fit

  • results, assuming L=2 ab¯¹

WG6, J-J.Blaising, LAPP/IN2P3


50000 μ̃ produced with γγ -> h overlaid

WG6, J-J.Blaising, LAPP/IN2P3


100000 ẽ produced with γγ -> h overlaid

WG6, J-J.Blaising, LAPP/IN2P3


  • ν̃ Benchmark Production Status

Preselection cuts applied on background samples,

10⁵ ν̃ produced with γγ -> h overlaid

WG6, J-J.Blaising, LAPP/IN2P3


  • ν̃, dN/dE and dN/dθ (e±)

2L4J reconstruction, with Kt=1 and Ejet min=10 GeV, εR=19%, εRxBR=5%

dN/dE(e±) with γγ->h overlaid , photon radiation correction, (left), Eγ min=2.5 GeV

dN/dθ(e±) with γγ->h overlaid , photon radiation correction, (right)

Good agreement of reconstructed variables with MC True distributions

WG6, J-J.Blaising, LAPP/IN2P3


  • ν̃, dN/d(ΔE/E²) (e±)

dN/ d(ΔE/E²) (e±) without and with γγ->h overlaid, loose cuts (left): <> shift

dN/d(ΔE/E²) (e±) without and with γγ->h overlaid, tight cuts (right):

Tight cuts => central value restored and energy resolution preserved =>

Innefficency=7%

WG6, J-J.Blaising, LAPP/IN2P3


  • ν̃, dN/d(ΔE/E²) and dN/dM

dN/d(ΔE/E²) (e±) with γγ->h overlaid, tight cuts, fit (left): rms G1=1.7.10¯⁵, rms G2=1.10¯⁴

Resolution function used for the mass determination

dN/dM (Di-Jet) with γγ->h overlaid, tight cuts (right):

rms of convoluted Gaussian, 4.7 GeV without γγ and 6.0 with γγ-> overlaid , <Ej>~60 GeV

At 3 TeV, 4.1 GeV without γγ and 4.7 with γγ-> overlaid , <Ej>~180 GeV

WG6, J-J.Blaising, LAPP/IN2P3


Discriminating variables
μ̃, Discriminating Variables

Distribution of the most discriminating observables

for μ̃benchmark.

Same variables used for the other channels

WG6, J-J.Blaising, LAPP/IN2P3


Dn de s b
μ̃, dN/dE (S+B)

dN/dE (S+B) distribution:

without BDT cut (left), e⁻ e⁺-> μ⁻ μ⁺ e¯e⁺ is the dominant background

with BDT cut (right), the other SM processes are the dominant

WG6, J-J.Blaising, LAPP/IN2P3


And masses
μ̃ and χ̃₁⁰ Masses

dN/dE distribution after background subtraction

mμ̃ = 560.84 ± 0.70 GeV (stat) ± 1.0 GeV (background subtraction), (mtrue=559 GeV)

mχ̃₁⁰ = 357.88 ± 0.46 GeV (stat) ± 1.3 GeV (background subtraction), (mtrue=357 GeV)

σ = 1.501± 0.03 fb (stat)

WG6, J-J.Blaising, LAPP/IN2P3


E dn de s b
dN/dE (S+B)

dN/dE distribution:

without BDT cut (left), SM processes are dominant backgrounds

with BDT cut (right), e⁺e¯νe νe and other susy processes are dominant

WG6, J-J.Blaising, LAPP/IN2P3


E and masses
ẽ and χ̃₁⁰ Masses

dN/dE distribution after background subtraction

mẽ = 556.86 ± 0.53 GeV (stat) ± 1.5 GeV (background subtraction), (mtrue=559 GeV)

mχ̃₁⁰ = 356.04 ± 0.47 GeV (stat) ± 1.3 GeV (background subtraction), (mtrue=357 GeV)

σ = 5.88± 0.05 fb (stat)

WG6, J-J.Blaising, LAPP/IN2P3


Dn de s b1
ν̃dN/dE (S+B)

dN/dE distribution:

without BDT cut (left), ẽL and other susy processes are dominant backgrounds

with BDT cut (right), the tails of other susyprocesses are reduced

WG6, J-J.Blaising, LAPP/IN2P3


And masses1
ν̃ and χ̃₁± Masses

dN/dE distribution after background subtraction

mν̃ = 644.3 ± 14.2 GeV (stat) , (mtrue=644 GeV)

mχ̃₁± = 487.6 ± 11.7 GeV ( stat) , (mtrue=487 GeV)

σ = 5.16± 0.23 fb (stat)

WG6, J-J.Blaising, LAPP/IN2P3


Summary
Summary

  • μ̃ and ẽ and ν̃ signal and SM background data production finished.

  • Pt cut or PFO tight cuts removes γγ -> h background => analysis done without

  • overlay on SM background

  • Lepton resolution functions as expected, ΔE/E² ~ 2x10¯⁵ for 2L or 2L4J final

  • states

  • mass and cross section determination:

  • mμ̃ = 560.84 ± 0.70 GeV (stat) ± 1.0 GeV (background subtraction)

  • mχ̃₁⁰ = 357.88 ± 0.46 GeV (stat) ± 1.3 GeV (background subtraction)

  • σ= 1.51 ± 0.03 fb (stat)

  • mẽ = 556.86 ± 0.53 GeV (stat) ± 1.5 GeV (background subtraction)

  • mχ̃₁⁰ = 356.04 ± 0.47 GeV (stat) ± 1.3 GeV (background subtraction)

  • σ = 5.88± 0.05 fb (stat)

  • mν̃ = 644.3 ± 14.2 GeV (stat)

  • mχ̃₁± = 487.6 ± 11.7 GeV ( stat)

  • σ = 5.16± 0.23 fb (stat)

WG6, J-J.Blaising, LAPP/IN2P3


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