Hartmann, M
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A Study of the Hadronic Angular Distribution in (e+ e-) Processes from 1.2-GeV to 3.0-GeV

Bernardini, M. ; Bollini, D. ; Brunini, P.L. ; et al.
Nuovo Cim.A 26 (1975) 163, 1975.
Inspire Record 91111 DOI 10.17182/hepdata.37720

The angular distribution of 2720 tracks of 1085 hadronic final states produced from (e+e-) annihilation has been studied in the 1.2 to 3.0 GeV total centre-of-mass energy range. If we parametrize the angular distribution in terms off(θ) =1 + A cos2 θ, where 6 is the angle between the hadronic track produced and the colliding-beam direction, the results show thatA is less than 0.21, with 90% confidence.

1 data table
Table 1

ANGULAR DISTRIBUTION OF CHARGED HADRONS FOUND TO BE 1 + (0.07 +- 0.11)*(COS(THETA)**2).


Differential Cross-Sections for the Charge Exchange Process pi+ p ---> pi0 (pi+ p) at 8-GeV/c, 16-GeV/c and 23-GeV/c

The Aachen-Berlin-Bonn-CERN-Cracow-Heidelberg collaboration Baker, P A ; Barnham, Keith W.J. ; Buschbeck, Brigitte ; et al.
Nucl.Phys.B 85 (1975) 31-38, 1975.
Inspire Record 90862 DOI 10.17182/hepdata.32119

The differential cross section d σ d t′ for the charge-exchange process π + p → π 0 ( π + p) at 8, 16 and 23 GeV/ c is presented for several regions of the π + p effective mass. It is found that the dip at t ′ ≈ 0.6 (GeV/ c ) 2 which is observed in the Δ(1236) mass band becomes a less pronounced structure in the higher mass regions. However, while the slope of the d σ d t′ distributions in the near-forward direction decreases strongly with increasing π + p mass, there is no evidence that the observed structure moves to higher values of t ′ as the π + p mass increases. These results are consistent with a Regge-exchange picture where the position of the dip is determined by the exchanged trajectory, but are inconsistent with a simple geometrical picture.

1 data table
Table 1

TP DEPENDENCE FOR FOUR <PI+ P> MASS INTERVALS.


Observation of a Diffraction Minimum in the Proton Proton Elastic Scattering at the ISR

Böhm, A. ; Bozzo, M. ; Ellis, R. ; et al.
Phys.Lett.B 49 (1974) 491-496, 1974.
Inspire Record 89421 DOI 10.17182/hepdata.27962

We have investigated the pp elastic scattering at the CERN Intersecting Storage Rings (ISR). We report results for centre-of-mass scattering angles between 30 and 100 mrad and for centre-of-mass energies of 23.5,30.7, 44.9 and 53 GeV. The elastic differential cross-section shows a diffraction-like shape with a sharp minimum at about t = −1.4 GeV 2 .

8 data tables
Table 1

No description provided.

Table 2

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Table 3

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Experimental Results on pi- p Interactions in the Center-Of-Mass-Energy Range 1.50-GeV-1.74-GeV

Dolbeau, J. ; Neveu, M. ; Triantis, F.A. ; et al.
Nucl.Phys.B 78 (1974) 233-250, 1974.
Inspire Record 89856 DOI 10.17182/hepdata.21889

Channel cross sections, elastic differential cross sections and single pion production mass spectra and angular distributions are presented for π − p interactions, based on 139 000 events observed at six energies in the center of mass region 1.50–1.74 GeV.

10 data tables
Table 1

No description provided.

Table 2

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Table 3

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