Alam, M.S.
CDF
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Measurement of the t anti-t production cross section in p anti-p collisions at s**(1/2) = 1.96-TeV using dilepton events

The CDF collaboration Acosta, D. ; Affolder, T. ; Akimoto, T. ; et al.
Phys.Rev.Lett. 93 (2004) 142001, 2004.
Inspire Record 649267 DOI 10.17182/hepdata.54901

We report a measurement of the ttbar production cross section using dilepton events with jets and missing transverse energy in ppbar collisions at a center-of-mass energy of 1.96 TeV. Using a 197 +/- 12 pb-1 data sample recorded by the upgraded Collider Detector at Fermilab, we use two complementary techniques to select candidate events. We compare the number of observed events and selected kinematical distributions with the predictions of the Standard Model and find good agreement. The combined result of the two techniques yields a ttbar production cross section of 7.0 +2.4/-2.1(stat.) +1.6/-1.1(syst.) +/- 0.4(lum.) pb.

1 data table
Table 1

Measured values of cross section for a top mass of 175 GeV. The second DSYS error is the uncertainty in the luminosity.


Measurement of prompt charm meson production cross-sections in p anti-p collisions at s**(1/2) = 1.96-TeV

The CDF collaboration Acosta, D. ; Affolder, T. ; Ahn, M.H. ; et al.
Phys.Rev.Lett. 91 (2003) 241804, 2003.
Inspire Record 624447 DOI 10.17182/hepdata.42795

We report on measurements of differential cross sections d sigma/d p_t for prompt charm meson production in p anti-p collisions at s**(1/2) = 1.96 TeV using 5.8 +/- 0.3 pb-1 of data from the CDF II detector at the Fermilab Tevatron. The data are collected with a new trigger that is sensitive to the long lifetime of hadrons containing heavy flavor. The charm meson cross sections are measured in the central rapidity region |y| \leq 1 in four fully reconstructed decay modes: D0 --> K- pi+, D*+ -> D0 pi+, D+ --> K- pi+ pi+, D+_s--> phi pi+, and their charge conjugates. The measured cross sections are compared to theoretical calculations.

1 data table
Table 1

Measured prompt charm production cross sections for ABS(YRAP) < 1. The branching ratios used are (D0:3.81 +- 0.09 PCT), (D+:2.57 +- 0.06 PCT),(D+:9.1 +- 0.6 PCT) and (D/S+:1.8 +- 0.5 PCT).


Cross-section for forward J / psi production in p anti-p collisions at S = 1.8-TeV

The CDF collaboration Acosta, D. ; Affolder, T. ; Akimoto, H. ; et al.
Phys.Rev.D 66 (2002) 092001, 2002.
Inspire Record 603674 DOI 10.17182/hepdata.22217

The inclusive cross section for J/ψ production times the branching ratio B(J/ψ→μ+μ−) has been measured in the forward pseudorapidity region: B×dσ[p¯+p→J/ψ(pT>10GeV/c,2.1<|η|<2.6)+X]/dη=192±9(stat)±29(syst)pb. The results are based on 74.1±5.2pb−1 of data collected by the CDF Collaboration at the Fermilab Tevatron Collider. The measurements extend earlier measurements of the D0 Collaboration to higher pTJ/ψ. In the kinematic range where the experiments partially overlap, these data are in good agreement with previous measurements.

2 data tables
Table 1

The integrated cross section for J/PSI --> MU+ MU- decay.

Table 2

Cross section as a function of PT. Statistical errors only.