Abrams, G.S.
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Total cross-sections of K+- mesons and anti-protons on nucleons up to 3.3-GeV/c

Abrams, R.J. ; Cool, R.L. ; Giacomelli, G. ; et al.
Phys.Rev.D 1 (1970) 1917-1935, 1970.
Inspire Record 55141 DOI 10.17182/hepdata.25091

Total cross sections of K± and p¯ on hydrogen and deuterium were measured in a standard transmission experiment with statistical precisions of the order of 0.05-0.25%. Data were obtained in the momentum range 2.45-3.30 GeV/c for K−N, 1.55-3.30 GeV/c for K+N, and 1.00-3.30 GeV/c for p¯N. Cross sections for the pure isotopic spin states are obtained using a procedure for the deuterium data which takes into account Fermi motion and the shadow effect. Evidence for the following new structures was found: Y1*(2455), Y1*(2620), Y0*(2585), Z1*(2150), Z1*(2500), π1*(2290), π1*(2350), and π0*(2375).

5 data tables
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Measurement of p- p and p- d total cross-sections at 3.00 gev/c

Abrams, R.J. ; Cool, R.L. ; Giacomelli, G. ; et al.
Phys.Rev.D 1 (1970) 2477-2480, 1970.
Inspire Record 61714 DOI 10.17182/hepdata.4928

In a new measurement of proton total cross sections at 3.00 GeV/c, the p−d total cross section is found to be lower than a previous measurement by 1.17±0.09 mb. This implies a corresponding new value for the total cross section for I=0 which is 2.18±0.27 mb lower than the previous value. Possible sources of systematic error are discussed.

4 data tables
Table 1

No description provided.

Table 2

'1'. '2'. '3'. '5'.

Table 3

No description provided.

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A2+ mass spectrum in pi+ p interactions at 3.7 gev/c

Barnham, K.W.J. ; Abrams, G.S. ; Butler, W.R. ; et al.
Phys.Rev.Lett. 26 (1971) 1494-1498, 1971.
Inspire Record 68979 DOI 10.17182/hepdata.21630

A study of the A2+ mass spectrum in π+p interactions at 3.7 GeVc is presented. For a cut of t′=0.1−2.0 GeV2 and on eliminating the Δ++ we find that the three-pion mass spectrum in the A2+ region is fitted by the dipole formula with a confidence level of 53% and a single Breit-Wigner formula with a confidence level of 11%. Our result thus favors A2+ splitting although a single Breit-Wigner fit cannot be ruled out. We also report the A2+ decay branching fractions measured over all t′ values. They are 0.78 ± 0.05, 0.15 ± 0.04, 0.06 ± 0.03, and < 0.02 for ρπ, ηπ, KK¯, and η′π, respectively, in good agreement with other experiments.

1 data table
Table 1

No description provided.


Pi- p interactions at 3.25 gev/c. two-prong events

Guzhavin, V.M. ; Vetlitskii, I.A. ; Kaidalov, A.B. ; et al.
Yad.Fiz. 14 (1971) 354-366, 1971.
Inspire Record 69448 DOI 10.17182/hepdata.19292

None

1 data table
Table 1

BREIT-WIGNER RESONANCE FITS WITH BACKGROUND.


Resonance production in k- neutron interactions at k- momenta of 1.45 and 1.65 gev/c

Colley, D.C. ; Cox, G.F. ; Eastwood, D. ; et al.
Nucl.Phys.B 31 (1971) 61-85, 1971.
Inspire Record 68588 DOI 10.17182/hepdata.33257

Results are reported on K − -neutron interactions at c.m. energies near 2 GeV. The interactions are dominated by strong production of hyperon resonances, particularly Σ(1385), Λ(1405) and Λ(1520). Production cross sections and angular distributions are given for the Σ(1385), Λ(1405) and Λ(1520) and branching fractions to decay modes observed in the experiment are given for Σ(1385) and Λ(1520). The strong energy dependence of some features of the data suggests that s -channel effects are dominant.

6 data tables
Table 1

No description provided.

Table 2

RESONANCE CROSS SECTIONS FOR <K- PI- P> FINAL STATE.

Table 3

RESONANCE CROSS SECTIONS FOR <AK0 PI- N> FINAL STATE.

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Rho0 delta++ and omega delta++ joint decay correlations at 3.7 gev/c

Barnham, K.W.J. ; Abrams, G.S. ; Butler, W.R. ; et al.
Phys.Rev.D 7 (1973) 1384-1394, 1973.
Inspire Record 82336 DOI 10.17182/hepdata.22157

The joint decay density-matrix elements have been measured for the ρ0Δ++ and ωΔ++ channels at 3.7 GeV/c. The data are presented as a function of momentum transfer in both the t-channel and s-channel coordinate systems. The presence of correlated decays is illustrated for both reactions by employing selective cuts on the decay angles of one resonance, and displaying the effects on the decay distribution of the opposing resonance. An amplitude analysis is performed with the data near 0° production angle, where we obtain a helicity decomposition of the scattering amplitude with no experimental ambiguity.

4 data tables
Table 1

T-CHANNEL COORDINATE SYSTEM (XYZ=TH).

Table 2

T-CHANNEL COORDINATE SYSTEM (XYZ=TH).

Table 3

S-CHANNEL COORDINATE SYSTEM (XYZ=SH).

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Vector-meson electroproduction at high q-squared

Ahrens, L. ; Berkelman, Karl ; Brown, G.S. ; et al.
Phys.Rev.Lett. 31 (1973) 131-133, 1973.
Inspire Record 84487 DOI 10.17182/hepdata.47133

We have measured ρ0, ω (combined) and ϕ electroproduction over a range of virtual-photon four-momentum Q2 from 0.4 to 2.2 GeV2 and for photon energies ν from 2.7 to 8.6 GeV. We find that the slope of the t (momentum transfer) dependence of the ρ0 and ω forward peak decreases with increasing Q2 to less than half of the photoproduction slope.

1 data table
Table 1

The cross section for virtual photon are derived from E- P cross section bydividing on the virtual-photon flux factor.


$\pi^- p$ Interactions at 205-GeV/c: Cross-Sections and Charged Particle Multiplicity.

Bogert, D. ; Hanft, R. ; Huson, F.R. ; et al.
Phys.Rev.Lett. 31 (1973) 1271-1274, 1973.
Inspire Record 81730 DOI 10.17182/hepdata.21380

Results are reported based on a study of 3114 π−p events at 205 GeV/c in the National Accelerator Laboratory 30-in. bubble chamber. The measured π−p total and elastic cross sections are 24.0 ± 0.5 and 3.0 ± 0.3 mb, respectively. The elastic differential cross section has a slope of 9.0 ± 0.7 GeV−2 for 0.03≤−t≤0.6 GeV2. The average charged-particle multiplicity for the inelastic events is 8.02 ± 0.12.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


LARGE ANGLE PROTON AND PION PRODUCTION IN DEEP INELASTIC ELECTRON SCATTERING

Ahrens, L. ; Berkelman, Karl ; Brown, G.S. ; et al.
Phys.Rev.D 9 (1974) 1894, 1974.
Inspire Record 80405 DOI 10.17182/hepdata.47134

We have measured ep, eπ+, and eπ− coincidences for scattered electrons in the range Q2=0.4 to 2.2 GeV2 and W=2 to 4 GeV. We find (a) that vector-meson production decreases with Q2 more rapidly than does the total virtual-photon-plus-proton cross section, more rapidly even than the prediction of simple vector dominance, (b) that the slope of the t distribution in ρ and ω production becomes flatter with increasing Q2 and seems to be at least approximately a function of the single variable xρ=(Q2+mρ2)2Mν, (c) that the fraction of final states containing a proton decreases with increasing Q2, (d) that in the central region of longitudinal momenta the inclusive π+ yield seems to increase relative to the π− yield as Q2 increases, and (e) that the average transverse momentum of π− is greater than of π+ in the central region of longitudinal momenta.

28 data tables
Table 1

No description provided.

Table 2

The data with (C=Q=RHO+OMEGA) are obtained by excluding the contribution from RHO and OMEGA production.

Table 3

No description provided.

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The Discovery of a Second Narrow Resonance in e+ e- Annihilation

Abrams, G.S. ; Briggs, D. ; Chinowsky, William ; et al.
Phys.Rev.Lett. 33 (1974) 1453-1455, 1976.
Inspire Record 91611 DOI 10.17182/hepdata.21287

We have observed a second sharp peak in the cross section for e+e−→hadrons at a center-of-mass energy of 3.695±0.004 GeV. The upper limit of the full width at half-maximum is 2.7 MeV.

1 data table
Table 1

No description provided.