Warren, G.
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Production of 4 pi+- and 6 pi+- by e+ e- Annihilation Between 2.4-GeV and 7.4-GeV

Jean-Marie, B. ; Abrams, G.S. ; Boyarski, A. ; et al.
SLAC-PUB-1711, 1976.
Inspire Record 108089 DOI 10.17182/hepdata.18658

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.


The Inclusive Reactions $p + n \to p + X$ and $\pi^+ + n \to p + X$ at 100-GeV/c

Hanlon, J. ; Brody, A. ; Engelmann, R. ; et al.
Phys.Rev.Lett. 37 (1976) 967, 1976.
Inspire Record 108156 DOI 10.17182/hepdata.21040

We have measured the inclusive cross section for the reactions p+n→p+X and π++n→p+X at 100 GeV/c in the kinematic region |t|<1.0 GeV2. The data were obtained from an exposure of the Fermilab 30-in. deuterium-filled bubble chamber to a tagged positively charged beam. The differential cross sections for these reactions are observed to scale in the ratio of the pn and π+n total cross sections and to be consistent with the predictions of a Reggeized one-pion-exchange model.

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

rivet Analysis
Observation of a Resonance at 4.4-GeV and Additional Structure Near 4.1-GeV in e+ e- Annihilation

Siegrist, J. ; Abrams, G.S. ; Boyarski, A. ; et al.
Phys.Rev.Lett. 36 (1976) 700, 1976.
Inspire Record 108144 DOI 10.17182/hepdata.21093

We observe a resonancelike structure in the total cross section for hadron production by e+e− colliding beams at a mass of 4414 ± 7 MeV having a total width Γ=33±10 MeV. From the area under this resonance, we deduce the partial width to electron pairs to be Γee=440±140 eV. Further structure of comparable width is present near 4.1 GeV.

1 data table
Table 1

No description provided.


Coherent Photoproduction of Vector Mesons on Deuterium at 5.5-GeV

Gupta, Virendra Prakash ; Fung, S.Y. ; Oh, Y.T. ; et al.
Phys.Rev.D 14 (1976) 42-54, 1976.
Inspire Record 115714 DOI 10.17182/hepdata.24672

Coherent photoproduction of vector mesons ρ0, ω, φ, and ρ′ on deuterium was studied using the SLAC 82-in. bubble chamber exposed to linearly polarized photons at 5.5 GeV. The reaction channel γd→π+π−d was studied in detail. Nine independent density-matrix parameters have been determined from the ρ0 decay distribution. ρ production in this channel was found to proceed almost completely through natural-parity exchange for |t|≤0.25 GeV2 and conserve s-channel c.m. helicity for |t|≤0.15 GeV2. A measurement of differential cross section for this channel has been made.

3 data tables
Table 1

POLARIZED PHOTON - VECTOR MESON DENSITY MATRICES ARE EXPLAINED BY SCHILLING/SEYBOTH/WOLF NP B15, 397 (1970). 'SH' - HELICITY FRAME..............Z = 3,RF = 1-2. 'TH' - GOTTFRIED-JACKSON FRAME.....Z = 1,RF = 3. 'ADAIR' - ADAIR FRAME..............Z = 1,RF = 1-2.

Table 2

No description provided.

Table 3

ERROR INCLUDES BACKGROUND UNCERTAINTY.


Inelastic Muon-Proton Scattering: Multiplicity Distributions, and Prong Cross-Sections

del Papa, C. ; Dorfan, David E. ; Flatte, Stanley M. ; et al.
Phys.Rev.D 13 (1976) 2934, 1976.
Inspire Record 108053 DOI 10.17182/hepdata.24754

In a streamer-chamber experiment at the Stanford Linear Accelerator Center, we observed hadron production in inelastic collisions of 14-GeV positive muons in a liquid hydrogen target. We report on the experiment, the analysis, and the resulting cross sections for hadronic prongs as well as the charged-hadron multiplicity distributions.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Measurements on the Differential Cross-Section of the pi0 Photoproduction on Hydrogen

Almehed, S. ; Von Dardel, G. ; Jarlskog, G. ; et al.
Phys.Scripta 13 (1976) 321-326, 1976.
Inspire Record 115713 DOI 10.17182/hepdata.19325

The differential cross section for photoproduction of π° on hydrogen has been measured in a photon energy range of 560-690 MeV and for production angles in the interval 90°-105° in the centre of mass system. The experiment detects the recoil proton and a π°-decay photon in coincidence, using optical spark chambers and a lead glass Cerenkov counter. Presented cross sections, based on 35 000 events recorded on film, are in good agreement with recent phase shift analysis.

9 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Observation of a Spin 4 Neutral H Meson with 2-GeV Mass

Apel, W.D. ; Augenstein, K. ; Bertolucci, E. ; et al.
Yad.Fiz. 23 (1976) 333-340, 1976.
Inspire Record 113106 DOI 10.17182/hepdata.19080

None

1 data table
Table 1

No description provided.


Multi-Pion Production Below 1.1-GeV by e+ e- Annihilation

Cosme, G. ; Courau, A. ; Dudelzak, B. ; et al.
Phys.Lett.B 63 (1976) 349-351, 1976.
Inspire Record 115717 DOI 10.17182/hepdata.27637

The production of multipion events by e + e − annihilation has been measured at centre of mass energies 915,990 and 1076 MeV. Both channels e + e − → π + π − π o and e + e − → π + π − π + π − have been analysed. An energy threshold effect analysed. An energy threshold effect around 919 MeV ( m ω + m π o ) has been evidenced for the π + π − π o π o channel and the cross section is consistent with the quasi two-body process e + e − → ωπ o . The cross section for π + π − π + π − is lower by an order of magnitude and increases with the energy.

2 data tables
Table 1

SYSTEMATIC ERROR INCLUDED. RADIATIVE EFFECT (<15 PCT) INCLUDED.

Table 2

MULTIHADRON PRODUCTION CROSS SECTION DEDUCED AS SUM OF FOUR PION CHANNELS.


Angular Distribution of the Target Asymmetry on Polarized Protons for the Reaction gamma p (Polarized) --> pi+ n at a Photon Energy of 700-MeV

Althoff, K.H. ; Conrad, R. ; Gies, M. ; et al.
Phys.Lett.B 63 (1976) 107-110, 1976.
Inspire Record 114330 DOI 10.17182/hepdata.27654

At the Bonn 2.5 GeV electron synchrotron the angular distribution of the target asymmetry T = (σ↑ − σ↓) (σ↑ + σ↓) for the reaction γp↑ → π + n was measured at a mean photon energy of 700 MeV and pion CM-angles from 50° to 155°. The combination of a 3 He-cryostat, polarizing the free protons in the target up to 65%, with a large acceptance magnet for pion detection led to statistical errors of the target asymmetry comparable with those of cross section measurements.

1 data table
Table 1

No description provided.


Measurements of the Spin Rotation Parameter R in p p and pi+ p Elastic Scattering at 45-GeV/c

The SERPUKHOV-SACLAY-DUBNA-MOSCOW collaboration Pierrard, J. ; Bruneton, C. ; Bystricky, J. ; et al.
Phys.Lett.B 61 (1976) 107-109, 1976.
Inspire Record 113035 DOI 10.17182/hepdata.27706

The spin rotation sf R in pp and π + p elastic scattering at 45 GeV/c has been measured at the Seppukhov accelarator, for z . sfnc ; t |; ranging from 0.2 to 0.5 (GeV/) 2 . The results are presented, together with previous R measurements at lower energies. The equality of the values for R in proton-proton and pion-proton scattering, within the experimental errors, is a test of factorization of the residues in the pomeron exchange.

2 data tables
Table 1

No description provided.

Table 2

No description provided.