Cocconi, G.
Proton-Proton Scattering
[100.0, 1000.0]
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Mid-rapidity neutral pion production in proton proton collisions at s**(1/2) = 200-GeV

The PHENIX collaboration Adler, S.S. ; Afanasiev, S. ; Aidala, C. ; et al.
Phys.Rev.Lett. 91 (2003) 241803, 2003.
Inspire Record 617784 DOI 10.17182/hepdata.41956

The invariant differential cross section for inclusive neutral pion production in p+p collisions at sqrt(s_NN) = 200 GeV has been measured at mid-rapidity |eta| < 0.35 over the range 1 < p_T <~ 14 GeV/c by the PHENIX experiment at RHIC. Predictions of next-to-leading order perturbative QCD calculations are consistent with these measurements. The precision of our result is sufficient to differentiate between prevailing gluon-to-pion fragmentation functions.

1 data table
Table 1

The invariant differential cross section as a function of PT. The mean PT here is defined as the PT for which the cross section equals its average over thebin.


Strangeness enhancement in central S + S collisions at 200-GeV/nucleon.

The NA35 collaboration Baechler, J. ; Bartke, J. ; Bialkowska, H. ; et al.
Nucl.Phys.A 525 (1991) 221C-226C, 1991.
Inspire Record 328899 DOI 10.17182/hepdata.36820

None

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Kaon Production at 200-{GeV} and 900-{GeV} Center-of-mass Energy

The UA5 collaboration Ansorge, R.E. ; Asman, B. ; Booth, C.N. ; et al.
Phys.Lett.B 199 (1987) 311-316, 1987.
Inspire Record 254608 DOI 10.17182/hepdata.30057

Results on inclusive kaon production at 200 and 900 GeV centre of mass (CM) energy obtained with the UA5 detector at the pulsed CERN SPS antiproton-proton Collider are presented and compared with our earlier data at 546 GeV. The average transverse momentum 〈 p t 〉 of kaons has been estimated to be (0.50±0.04) GeV/ c at 200 GeV and (0.63±0.03) GeV/ c at 900 GeV in the central region and shows an increase with CM energy that is smore rapid than that expected from previous ISR data. The yield of kaons per inelastic p p event is found to be (0.72±0.12) at 200 GeV and (1.31±0.14) at 900 GeV. Finally, the K/π ratio has been found to exhibit a very slow increase with CM energy.

1 data table
Table 1

No description provided.


Measurements of Elastic Scattering in $\alpha^- \alpha$ and $\alpha$ - Proton Collisions at the {CERN} Intersecting Storage Rings

The CERN-Naples-Pisa-Stony Brook collaboration Ambrosio, M. ; Anzivino, G. ; Barbarino, G. ; et al.
Phys.Lett.B 113 (1982) 347-352, 1982.
Inspire Record 176959 DOI 10.17182/hepdata.30919

We measured the elastic scattering of αα at s = 126 GeV and of α p at s = 89 GeV . For αα , the differential cross section d σ /d t has a diffractive pattern minima at | t | = 0.10 and 0.38 GeV 2 . At small | t | = 0.05−0.07 GeV 2 , this cross section behaves like exp[(100 ± 10) t ]. Extrapolating a fit to the data to the optical point, we obtained for the total cross section α tot ( αα ) = 250 ± 50 mb and an integrated elastic cross section σ e1 ( αα ) = 45 ± mb. Another method of estimating σ tot ( αα ), based on measuring the interaction rate, yielded 295 ± 40 mb. For α p, d σ /d t has aminimum at | t | = 0.20 GeV 2 , and for 0.05 < | t | < 0.18 GeV 2 behaves like exp[(41 ± 2) t ]. Extrapolating this slope to | t | = 0, we found σ tot ( α p) = 130 ± 20 and σ e1 ( α p) = 20 ± 4mb. Results on pp elastic scattering at s = 63 GeV agree with previous ISR experiments.

5 data tables
Table 1

Axis error includes +- 15/15 contribution.

Table 2

Axis error includes +- 15/15 contribution.

Table 3

METHOD 1 FOR SIG IS USING OPTICAL THEOREM. METHOD 2 FOR SIG IS BASED ON THE MEASURED LUMINOSITY-MONITOR CROSS SECTIONS.

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