DTag cut comparison

Comparison of DTag cuts

Producers used: DTagProd, TagDKaonProd, TagDPionProd, TagDPi0Prod, TagDEtaProd, TagDKShortProd, TagDEtaPrimeProd

DTag particle cuts

(* indicates superseded by later cut):

Particle	Default Cut	Peter-faking Selection	My (Existing) Selection
D_s	M_bc > 1.93 GeV	default	M_bc > 1.7 GeV
D_s	\|M_{D_s}^recon - M_{D_s}^PDG\| < 85 MeV	default*	default*
K	50 MeV < p < 2.0 GeV	125 MeV < p < 2.0 GeV	40 MeV < p < 2.0 GeV
	r₀ < 5 mm	default	default
	z₀ < 5 cm	default	default
	Track Χ² < 100,000	default	Track Χ² < 1,000
	cot(θ) < 2.53 (cos(θ) < 0.93)	default	default
	Hit Fraction > 0.5	default	default
	Use PID (Δ σ² + Δ LLH or alt)	default	default
	dE/dx σ < 3.0	default	dE/dx σ < 3.5
	p < 0 for "soft" K Use DBCD instead of D0CD Don't use TrackMan (unclear for me) RICH valid p > 0.7 RICH valid cot(θ) < 4/3 RICH γ ≥ 3 Δ σ² + Δ LLH < 0	default	default
π	50 MeV < p < 2.0 GeV	default	40 MeV < p < 2.0 GeV
	r₀ < 5 mm	default	default
	z₀ < 5 cm	default	default
	Track Χ² < 100,000	default	Track Χ² < 1,000
	cot(θ) < 2.53 (cos(θ) < 0.93)	default	default
	Hit Fraction > 0.5	default	default
	Use PID (Δ σ² + Δ LLH or alt)	default	default
	dE/dx σ < 3.0	default	dE/dx σ < 3.5
	RICH valid p > 0.7	default	RICH valid p > 0.65
	p < 0 for "soft" π Use DBCD instead of D0CD Don't use TrackMan (unclear for me) RICH valid cot(θ) < 4/3 RICH γ ≥ 3 Δ σ² + Δ LLH < 0	default	default
π⁰	Pull mass < 3.0	default	default
	#σ < 1,000	default	default
	0 < M_π⁰ < 1,000 GeV	default	default
	Χ² < 10,000	default	default
	E_γ^Barrel > 0 MeV	default	E_γ^Barrel > 30 MeV
	E_γ^Endcap > 0 MeV	default	E_γ^Endcap > 50 MeV
	Reject two encap γ	Don't reject π⁰ w/ two endcap γ	default
	Don't need E₉/E₂₅ O.K. (really < 0.8) for high γ	default	default
	Don't need E₉/E₂₅ O.K. (really < 0.8) for low γ	default	default
	Don't use splitoff	default	Use Splitoff
η	Pull mass < 3.0	default	default
	#σ < 1,000	default	default
	0 < M_π⁰ < 1,000 GeV	default	default
	Χ² < 10,000	default	default
	E_γ^Barrel > 0 MeV	default	E_γ^Barrel > 30 MeV
	E_γ^Endcap > 0 MeV	default	E_γ^Endcap > 50 MeV
	Reject two encap γ	default	default
	Don't need E₉/E₂₅ O.K. for high γ	default	default
	Don't need E₉/E₂₅ O.K. for low γ	default	default
	Don't use splitoff	default	Use Splitoff
K_s	Lots of Χ²-like variables	default	default
	#σ < 4.5 (1 &simga; = 4 MeV)	#σ < 1.575 (6.3 MeV)	#σ < 3.0 (12 MeV)
	Don't use CleanV0	default	default
η'	Use above π, η cuts Don't use E₉/E₂₅ for ρ γ 30 MeV < E_γ < 2 GeV for ρ γ	default	default
	947.8 MeV < M_{π π η} < 967.8 MeV	default	default
	942.8 MeV < M_{ρ γ} < 972.8 MeV	default	920 MeV < M_{ρ γ} < 995 MeV
	0 GeV < M_ρ < 10 GeV	default	500 MeV < M_ρ < 1 GeV

Additional cuts in Peter-faking selection:
Note: Recoil mass uses reconstructed p_{D_s} and E_{D_s} = sqrt(p_{D_s}² + m_{D_s}²).

Mode Cuts

K_s K

M_recoil > 2.051 GeV

Veto if M_{K⁺ π^-} > 1.83 GeV

K K π

M_recoil > 2.051 GeV

Veto if 1.845 GeV < M_{K⁺ K^-} < 1.88 GeV

K K π π⁰

M_recoil > 2.099 GeV

Veto if 1.86 GeV < M_{K⁺ K^- π⁺} < 1.88 GeV

p_π > 100 MeV

p_π⁰ > 100 MeV

π π π

M_recoil > 2.101 GeV

p_π > 100 MeV

Veto if 475 MeV < M_{π⁺ π^-} < 520 MeV

Veto if 1.84 GeV < M_{π⁺ π^-} < 1.885 GeV

Treat π^- (for D_s⁺) as a K^-, and veto if 1.845 GeV < M_{K^- π⁺} < 1.88 GeV

π η

M_recoil > 2.051 GeV

π η'

M_recoil > 2.051 GeV

Mode	Cuts
K_s K	M_recoil > 2.051 GeV Veto if M_{K⁺ π^-} > 1.83 GeV
K K π	M_recoil > 2.051 GeV Veto if 1.845 GeV < M_{K⁺ K^-} < 1.88 GeV
K K π π⁰	M_recoil > 2.099 GeV Veto if 1.86 GeV < M_{K⁺ K^- π⁺} < 1.88 GeV p_π > 100 MeV p_π⁰ > 100 MeV
π π π	M_recoil > 2.101 GeV p_π > 100 MeV Veto if 475 MeV < M_{π⁺ π^-} < 520 MeV Veto if 1.84 GeV < M_{π⁺ π^-} < 1.885 GeV Treat π^- (for D_s⁺) as a K^-, and veto if 1.845 GeV < M_{K^- π⁺} < 1.88 GeV
π η	M_recoil > 2.051 GeV
π η'	M_recoil > 2.051 GeV