Campanelli, Mario
Azimuthal Angular Dependence
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rivet Analysis
Measurement of Particle Production and Inclusive Differential Cross Sections in $p\bar{p}$ Collisions at $\sqrt{s}=1.96$ TeV

The CDF collaboration Aaltonen, T. ; Adelman, J. ; Akimoto, T. ; et al.
Phys.Rev.D 79 (2009) 112005, 2009.
Inspire Record 817466 DOI 10.17182/hepdata.52134

We report a set of measurements of particle production in inelastic pbar{p} collisions collected with a minimum-bias trigger at the Tevatron Collider with the CDF II experiment. The inclusive charged particle transverse momentum differential cross section is measured, with improved precision, over a range about ten times wider than in previous measurements. The former modeling of the spectrum appears to be incompatible with the high particle momenta observed. The dependence of the charged particle transverse momentum on the event particle multiplicity is analyzed to study the various components of hadron interactions. This is one of the observable variables most poorly reproduced by the available Monte Carlo generators. A first measurement of the event transverse energy sum differential cross section is also reported. A comparison with a Pythia prediction at the hadron level is performed. The inclusive charged particle differential production cross section is fairly well reproduced only in the transverse momentum range available from previous measurements. At higher momentum the agreement is poor. The transverse energy sum is poorly reproduced over the whole spectrum. The dependence of the charged particle transverse momentum on the particle multiplicity needs the introduction of more sophisticated particle production mechanisms, such as multiple parton interactions, in order to be better explained.

3 data tables
Table 1

Charged particle invariant distribution as a function of PT. This data is that given in the erratum with the systematic errors read from the plot.

Table 2

Dependance of the average track PT on the event multiplicity.

Table 3

The differential charged particle distribution as a function of the summed ET of charged particles.


rivet Analysis
Measurement of the cross section for prompt diphoton production in p anti-p collisions at s**(1/2) = 1.96-TeV

The CDF collaboration Acosta, D. ; Adelman, J. ; Affolder, T. ; et al.
Phys.Rev.Lett. 95 (2005) 022003, 2005.
Inspire Record 667384 DOI 10.17182/hepdata.41865

We report a measurement of the rate of prompt diphoton production in $p\bar{p}$ collisions at $\sqrt{s}=1.96 ~\hbox{TeV}$ using a data sample of 207 pb$^{-1}$ collected with the upgraded Collider Detector at Fermilab (CDF II). The background from non-prompt sources is determined using a statistical method based on differences in the electromagnetic showers. The cross section is measured as a function of the diphoton mass, the transverse momentum of the diphoton system, and the azimuthal angle between the two photons and is found to be consistent with perturbative QCD predictions.

3 data tables
Table 1

Cross section as a function of the diphoton mass.

Table 2

Cross section as a function of the diphoton transverse momentum.

Table 3

Cross section as a function of the diphoton azimuthal angle difference.