Levi Sandri, P.
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Single Pion Production in anti-Proton-Proton Interactions

Stenbacka, R. ; Ekspong, G. ; Holmgren, S.O. ; et al.
Nucl.Phys.B 135 (1978) 20-44, 1978.
Inspire Record 134909 DOI 10.17182/hepdata.35129

Single-pion production in p p interactions at 9.1 GeV/ c is analysed and cross sections are given. The p lab dependence of the isospin amplitudes is determined by a fit to the world data. The data are also compared with the predictions of a reggeized Deck model. The results and the N π N amplitudes are compared with the results at other energies and with the corresponding N π N amplitudes.

2 data tables
Table 1

MEASUREMENTS FROM OTHER EXPERIMENTS DOWN TO PLAB = 1 GEV ALSO QUOTED.

Table 2

No description provided.


Inclusive Production of Vector and Tensor Mesons in anti-Proton-Proton Annihilation and Nonannihilation Interactions at 9.1-GeV/c

The LIVERPOOL-STOCKHOLM collaboration Markytan, M. ; Johnson, P. ; Mason, P. ; et al.
Nucl.Phys.B 143 (1978) 263-284, 1978.
Inspire Record 136559 DOI 10.17182/hepdata.8198

Cross sections have been determined for the inclusive production of vector (ϱ 0 , ω, K ∗ ) and tensor (f, A 2 ± ) mesons in p p reactions at 9.1 GeV/c for both annihilation and non-annihilation processes. Distributions in the Feynman variable x and transverse momentum squared, p T 2 , have been examined for the ϱ 0 , ω and f mesons. The slopes for p T 2 appear to be exponential and decrease with increasing particle mass for both annihilation and non-annihilation reactions, furthermore the slopes have consistently higher values for non-annihilation reactions. Comparisons with other data indicate that the ratio ϱ 0 / π − is independent of antiproton momentum in annihilation processes.

13 data tables
Table 1

NON-ANNIHILATION EVENTS.

Table 2

No description provided.

Table 3

No description provided.

More…

Elastic He p Scattering Under Small Angles in the Energy Interval 1.75-GeV/Nucleon-4.13-GeV/Nucleon.

The DUBNA-WARSAW-LENINGRAD collaboration Beznogikh, G.G ; Budilov, V.A. ; Devenski, P. ; et al.
Yad.Fiz. 27 (1978) 710-715, 1978.
Inspire Record 134520 DOI 10.17182/hepdata.18191

None

3 data tables
Table 1

X ERROR D(-T)/(-T) = 2.0000 PCT.

Table 2

X ERROR D(-T)/(-T) = 2.0000 PCT.

Table 3

X ERROR D(-T)/(-T) = 2.0000 PCT.


Sharp Backward Peak in p He-4 Elastic Scattering at 1.05-GeV

Berger, J. ; Duflo, J. ; Goldzahl, L. ; et al.
Phys.Rev.Lett. 41 (1978) 152-155, 1978.
Inspire Record 135350 DOI 10.17182/hepdata.20833

p-He4 elastic scattering has been measured at 1.05-GeV incident proton energy, close to 180° in the center of mass. The steep backward peak observed at lower energies is still present, but its slope appears to decrease.

1 data table
Table 1

No description provided.


HYPERON POLARIZATION IN LAMBDA P ELASTIC SCATTERING IN THE RANGE 60-GEV/C < P < 380-GEV/C

Edelman, B. ; Bunce, G. ; Devlin, T. ; et al.
Phys.Rev.Lett. 40 (1978) 491-494, 1978.
Inspire Record 131690 DOI 10.17182/hepdata.20918

Polarization of the scattered Λ has been measured in the reaction Λ+p→Λ+p. A total of 90 000 elastic events was recorded. Polarization was observed which decreased in magnitude with increasing momentum. For 0.1<~|t|<~0.4 GeV2 the polarization is P=−0.21±0.07 for p=110 GeV/c and is +0.01±0.04 at p=320 GeV/c. Results for 860 Λ¯−p elastic scatterings are also presented.

2 data tables
Table 1

90000 ELASTIC EVENTS.

Table 2

860 ELASTIC EVENTS.


rivet Analysis
Observation of a Narrow Resonance at 10.02-GeV in e+ e- Annihilations

Bienlein, J.K. ; Horber, E. ; Leissner, M. ; et al.
Phys.Lett.B 78 (1978) 360-363, 1978.
Inspire Record 131524 DOI 10.17182/hepdata.45244

The ϒ′ state has been observed as a narrow resonance at M ( ϒ ′) = 10.02 ± 0.02 GeV in e + e − annihilations, using a NaI and lead-glass detector in the DORIS storage ring at DESY. The ratio Г ee Г had /Г tot of electronic, hadronic, and total widths has been measured to be 0.32 ± 0.13 keV. The parameters of the Г particle have also been determined to be/ M (Г)

2 data tables
Table 1

The data renormalized to the expected level of continuum based on the ratioof R=sigma(hadrons)/sigma(mu+mu-) = 4.7 at sqrt(s) = 5 GeV.

Table 2

The data renormalized to the expected level of continuum based on the ratioof R=sigma(hadrons)/sigma(mu+mu-) = 4.7 at sqrt(s) = 5 GeV.


Forward Inclusive Production Spectrum of $K(s$), $\Lambda^0$, $\bar{\Lambda}$0, and $n$ in the Collision of 200-{GeV}/$c \pi^-$, $K^-$, $\bar{p}$ and $p$ on Be

Edwards, R.T. ; Devlin, T. ; Edelman, B. ; et al.
Phys.Rev.D 18 (1978) 76, 1978.
Inspire Record 6216 DOI 10.17182/hepdata.24325

We have measured the forward production spectra of various neutral particles produced by π−, K−, p¯, and p at 200 GeV/c, and by π− at 290 GeV/c incident on a Be target. The salient features of these measurements are (1) copious production of KSo at large Feynman xL for incident π− and K−, (2) production of roughly equal fluxes of Λ0 and Λ¯0 for incident π−, and (3) close similarity of the following spectra: π−→n and K−→Λ0; π−→Λ0, π−→Λ¯0, and p→KS0; π−→KS0 and p→Λ0. The overall features of the various distributions seem to agree with the ideas of dimensional counting presented in the constituent-interchange model of quark collisions. Results are presented in terms of the invariant cross section Ed3σ(xL, PT=0)dp3 per Be nucleus for each inclusive reaction.

5 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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A Measurement of the Energy Dependence of Elastic $\pi p$ and $p p$ Scattering at Large Angles

Jenkins, K.A. ; Price, L.E. ; Klem, R. ; et al.
Phys.Rev.Lett. 40 (1978) 425, 1978.
Inspire Record 6233 DOI 10.17182/hepdata.3359

We have measured π±p and pp elastic differential cross sections in the range |cosθc.m.|<0.35 for incident momenta from 2 to 9.7 GeV/c for π−p and pp and from 2 to 6.3 GeV/c for π+p. We find that the fixed-c.m.-angle πp differential cross sections cannot be described as simple functions of s. The data are compared to the energy and angular dependence predicted by the constituent model of Gunion, Brodsky, and Blankenbecler.

56 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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INVARIANT CROSS-SECTIONS FOR THE INCLUSIVE REACTIONS anti-p p ---> pi+ X AND anti-p p ---> p X AT 22.4-GeV/c

The Alma Ata-Dubna-Helsinki-Moscow-Prague collaboration Boos, E.G. ; Ermilova, D.I. ; Samoilov, V.V. ; et al.
Nuovo Cim.A 47 (1978) 377, 1978.
Inspire Record 130221 DOI 10.17182/hepdata.37561

Invariant inclusive cross-sections for π+-mesons and protons from\(\bar pp\) reactions at 22.4 GeV/c are presented. The average multiplicity for the production of π+-mesons is 1.92±0.02 and for protons 0.41±0.02. Annihilation spectra have been approximated by using the difference between\(\bar pp\) and pp data. The resulting distributions have similar gross features as the total\(\bar pp\) data.

1 data table
Table 1

No description provided.


Measurements of the Photon Total Cross-Section on Protons from 18-GeV to 185-GeV

Caldwell, David O. ; Cumalat, John P. ; Eisner, A.M. ; et al.
Phys.Rev.Lett. 40 (1978) 1222, 1978.
Inspire Record 129172 DOI 10.17182/hepdata.3355

The photon total cross section on protons has been measured with high precision in the Fermilab tagged-photon beam for photon energies from 18 to 185 GeV. The cross section decreases to a broad minimum near 40 GeV, and then rises by about 4 μb over the remainder of the range. A ρ+ω+ϕ vector-dominance model (normalized to low-energy data) falls below the high-energy results by 2 to 6 μb, suggesting a contribution from charm-anticharm states.

2 data tables
Table 1

No description provided.

Table 2

No description provided.