My Name is Justin!

My Name is Justin

End? of Shower Studies

A plot of E₉/E₂₅ for all showers, showers from real photons, and showers from real photons that pass the E₉/E₂₅ cut.
E₉/E₂₅ distribution by energy for showers that come from real photons and those that come from all other sources (other particles and noise).
The contour of the E₉/E₂₅ OK cut.
φ vs. cos(θ) for showers that pass all my default shower cuts.

My default shower cuts:

No track
An OK E9/E25
The approval of splitoff
Doesn't form a π⁰ (unnecessary but irrelevant cut)
No valid mcTag (i.e. it's not from a real particle)
Not registered as hot channels

E9/E25 studies

The E9/E25 distribution of trackless showers (before and after an E9/E25 OK cut).

The E9/E25 distribution vs. Energy without and with the restriction that E9/E25 must be OK.

Effects of hot channel rejection

The cos(θ) distribution of showers with and without a hot channel rejection given:

No track
An OK E9/E25
The approval of splitoff
Doesn't form a π⁰ (probably foolish but irrelevant cut)
No valid mcTag (i.e. it's not from a real particle)

Zoomed in on only those with a hot channel rejection.

Just for some confusion, the φ vs. cos(θ) plot (lacking the E9/E25 and hot channel cuts).

Showers (passing splitoff and π⁰) by bb-meson type)

Meson breakdown of shower energies.

Effects of Splitoff and π⁰ on Eta reconstruction

Angular distribution of photons in Eta rest frame (550 MeV < p_&eta < 650 MeV).
Same effect, but with photon energy.
Eta momentum.

Energy distributions of showers

π⁰ and splitoff suppression.

By origin of shower

Initial Pi0 photon suppression results

Signal Monte Carlo (50 events; Etas restricted to w/in 50 MeV of 600 MeV)

Type of reconstructed Eta	# of Events
Real Etas (no suppression)	24
Fake Etas (no suppression)	13
Real Etas (suppression on)	16
Fake Etas (suppression on)	4

Generic Y(3S) Monte Carlo (7000 events; Etas restricted to w/in 50 MeV of 600 MeV)

Type of reconstructed Eta	# of Events
Real Etas (no suppression)	79
Fake Etas (no suppression)	829
Real Etas (suppression on)	53
Fake Etas (suppression on)	184

(sig.² to background doubles.)

Angular distribution of Eta->Gamma + Gamma photons in Eta rest frame.

Note: Eta momentum restricted to 550 MeV - 650 MeV.

Without pi0 suppression.

With pi0 suppression.