NEW! Recommended plots for talks are those made for the PRL

- D
^{0}-> K^{-}pi^{+} - D*
^{+}-> D^{0}pi^{+}, D^{0}-> K^{-}pi^{+} - D
^{+}-> K^{-}pi^{+}pi^{+} - D
_{s}^{+}-> phi pi^{+}, phi -> K^{+}K^{-}

- >= 25 axial COT hits
- >= 25 stereo COT hits
- >= 3 SVX phi side hits on different layers (except D*
^{+}slow pion) - p
_{T}>= 0.5 GeV/c - |z
_{0}| <= 47.25cm - SVX fiducial: at R=10.645 cm |z| <= 47.25 cm
- COT fiducial: at R=133 cm |z| <= 155 cm

- the track is matched with an SVT track;
- p
_{T}>= 2.0 GeV/c (offline and SVT) - 120 µm <= |d
_{0}| <= 1 mm (offline and SVT) - the track enters and leaves the same mechanical SVX barrel.

- the two tracks have opposite charge
- p
_{T1}+p_{T2}>=5.5 GeV/c (offline and SVT) - 2° <= |phi
_{1}-phi_{2}| <= 90°

- the K
^{-}pi^{+}pair is a trigger pair - L
_{xy}(D^{0}) >= 500 µm; - opposite sign impact parameters
- |z
_{0}(K^{-})-z_{0}(pi^{+})| <= 5 cm

- D
^{0}per p_{T}bin (shaded background) - D
^{0}summed over p_{T}bins (shaded background) - RECOMMENDED: use the PRL plot instead

Note 2: In the D

- A D
^{0}candidate with |m(Kpi)-m(D^{0})|<= 3 sigma m(D^{0}) - no SVX requirement for the soft pion;

- D*
^{+}per p_{T}bin (shaded background) - D*
^{+}summed over p_{T}bins (shaded background) - RECOMMENDED: use the PRL plot instead

- a trigger pair amongst the D
^{+}decay daughters - L
_{xy}(D^{+}) >= 800 µm - |Dz| <= 5cm between any two tracks
- chi
^{2}<= 30 for the three track vertex fit - Dm (=m(Kpipi)-m(Kpi)) >= 0.18GeV/c
^{2}, where m(Kpi) is the invariant mass of the trigger pair.

- D
^{+}per p_{T}bin (shaded background) - D
^{+}summed over p_{T}bins (shaded background) - RECOMMENDED: use the PRL plot instead

- the K
^{-}pi^{+}pair form a trigger pair; - 1.00 GeV/c
^{2}<= m(K^{+}K^{-}) <= 1.04 GeV/c^{2} - L
_{xy}(D_{s}^{+}) >= 500 µm - |Dz| <= 5 cm between any two tracks
- chi
^{2}<= 30 for the three track vertex fit

- D
_{s}^{+}per p_{T}bin (shaded background) - D
_{s}^{+}summed over p_{T}bins (shaded background) - RECOMMENDED: use the PRL plot instead

- D
^{0}impact parameter distribution: f_{D}(D^{0})=86.6±0.4±3.5% - D*
^{+}impact parameter distribution: f_{D}(D*^{+})=88.1±1.1±3.9% - D
^{+}impact parameter distribution: f_{D}(D^{+})=89.1±0.4±2.8% - D
_{s}^{+}impact parameter distribution: f_{D}(D_{s}^{+})=77.3±3.8±2.1% - RECOMMENDED: use the PRL plot instead

We find the XFT efficiency high (>95%) for all p

- SVT efficiency vs p
_{T} - SVT efficiency vs z and cot(theta)
- SVT efficiency vs z and phi for store 969
- SVT efficiency vs z and phi for store 1152

- comparison between measured and parametrized SVT two-track efficiency
- comparison between measured and simulated SVT two-track efficiency

- Decay angle of the pion in the D*
^{+}center of mass frame. - Decay angle of the kaon in the D
^{0}center of mass frame.

sigma

where N

Summing over all bins, we find the following values for the integrated cross section:

- sigma(D
^{0}, p_{T}>= 5.5 GeV) = 13.3±0.2±1.5µb (when comparing with D^{*+}and D^{+}, use: sigma(D^{0}, p_{T}>= 6.0 GeV) = 9.3±0.1±1.1µb) - sigma(D
^{*+}, p_{T}>= 6.0GeV) = 5.2±0.1±0.8µb - sigma(D
^{+}, p_{T}>= 6.0 GeV) = 4.3±0.1±0.7µb - sigma(D
_{s}, p_{T}>= 8.0 GeV) = 0.75±0.05±0.22µb

See also the following table with more details of the integrated cross section (plain text version).

The results are shown in a table of the differential cross section (plain text version).

- M. Cacciari and P. Nason, "Charm cross sections for the Tevatron RunII" JHEP 0309, 006 (2003). This is a Fixed Order Next-to-Leading Log (FONNL) calculation. Their code is publicly available. Non-perturbative effects in charm hadronization are taking into account using recent ALEPH data (R. Barate et al., "Study of charm production in Z decays" Eur.Phys.J.C16:597-611,2000)
- B.A. Kniehl, private communication.
Their calculation employs the method described in
B.A. Kniehl, G. Kramer, B. Potter,
Nucl.Phys. B597, 337-369 (2001).
The cross section has only been calculated for the D
^{*+}cross section.

- D
^{0}differential cross section - D
^{*+}differential cross section - D
^{+}differential cross section - D
_{s}differential cross section - RECOMMENDED: use the PRL plot instead

Data and theory are better compared by looking at the ratio:

We measure P

Since we cannot reconstruct charm mesons down to zero transverse momentum, we measure P

- P
_{V}=0.641±0.015(stat)±0.032(syst)

The measurement of the D

- u=0.94±0.04±0.11