HEPData Search

Forward differential cross sections for isospin-1 bosons produced in p+p→d+x+ were measured using a deuteron missing-mass spectrometer at a small angle between 4.0- and 12.3−GeVc incident momentum. Differential cross sections for π+ and ρ+ were extracted from the spectra using phase-space backgrounds. They range from 10.4 to 0.4 μb/sr for π+ and from 1.4 to 0.3 μb/sr for ρ+. A bump near 6 GeVc appears in both dπ and dρ channels. No clear evidence is seen for higher-mass bosons. The possible δ+ cross sections average less than 0.01 μb/sr.

3 data tables

Table 1

TECHNIQUE USED...ELECTRONIC. TABLE 1.

Table 2

TECHNIQUE USED...MISSING MASS. BREIT WIGNER USED WITH FIXED WIDTH (150 MEV) AND VARIABLE MASS (LATTER VARIED WITH MOMENTA FROM 715 TO 765 MEV). 6 PERCENT NORMALIZATION ERROR; 20 PERCENT FROM BREIT WIGNER FIT. TABLE 1.

Table 3

TECHNIQUE USED...MISSING MASS. CROSS-SECTIONS CORRESPOND TO VERY NARROW DELTA (962).

The Photoproduction of Neutral Pions from Protons at Forward Angles in the Resonance Region

Booth, P.S.L. ; Carroll, L.J. ; Holt, J.R. ; et al.

Nucl.Phys.B 84 (1975) 437-448, 1975.

Inspire Record 90412 DOI 10.17182/hepdata.32127

Differential cross sections for the photoproduction of pi-zero mesons from protons have been measured at angles between 10° and 70° c.m. in the energy range 0.85 GeV to 1.30 GeV. The values are compared with the fits to pion photoproduction data from three recent partial-wave analyses.

1 data table

Table 1

Inclusive Muon Production in $e^+ e^-$ Annihilation with $\sqrt{s}$ = 7.3-GeV

Badtke, D.H. ; Barnett, B.A. ; Jones, L.H. ; et al.

Phys.Rev.Lett. 40 (1978) 827, 1978.

Inspire Record 134548 DOI 10.17182/hepdata.20890

We present results on charged multiplicity nch=2 and nch>2 muon events produced in e+e− collisions with 〈s12〉=7.3 GeV at 90° to the beams. The background-subtracted inclusive cross section for the nch=2 events is 10.2±5.4 pb/sr, in agreement with the expected contribution from the heavy lepton τ. The cross section for the nch>2 events is 19.0±6.5 pb/sr whereas we expect only 2.9 pb/sr from the τ, indicating that we may be seeing the weak decays of charmed mesons.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

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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Fluctuations in Large Angle $\pi^\pm p$ Elastic Scattering

Jenkins, K.A. ; Price, L.E. ; Klem, R. ; et al.

Phys.Rev.Lett. 40 (1978) 429, 1978.

Inspire Record 6210 DOI 10.17182/hepdata.76245

Large-angle π±p elastic-scattering cross sections, measured between 2 and 9 GeV/c in fine intervals of incident momentum and scattering angle, are used to search for cross-section fluctuations occurring for small changes in the center-of-mass energy as suggested by Ericson and Mayer-Kuckuck and by Frautschi. Significant fluctuations are observed.

144 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Inclusive Hadron Production in $e^+ e^-$ Annihilation at $\left\langle s\right\ranlge = 53$-{GeV}$^2$

Aschman, D. ; Coyne, D.G. ; Groom, Donald E. ; et al.

Phys.Rev.Lett. 41 (1978) 445, 1978.

Inspire Record 130231 DOI 10.17182/hepdata.20818

We report on inclusive hadron production in e+e− annihilation at 〈s〉=53 GeV2, using a small solid-angle magnetic spectrometer with good particle identification at 90° to the beams at SPEAR II. The cross sections of π± and K± when compared with data at s=23 GeV2 exhibit scaling in (sβ)dσdx with x=2Es12. The invariant cross section depends on the momentum as p−4.

12 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Measurement of Wide Angle Elastic Scattering of Pions and Protons Off Protons

Jenkins, K.A. ; Price, L.E. ; Klem, R. ; et al.

Phys.Rev.D 21 (1980) 2445, 1980.

Inspire Record 8517 DOI 10.17182/hepdata.24189

A comprehensive measurement of the differential cross section for π±p and pp elastic scattering has been made at large center-of-mass angles. π−p and pp scattering were measured with incident laboratory momenta ranging from 2 to 9.5 GeV/c. π+p scattering was measured with momenta from 2 to 6.3 GeV/c. Scattering angles were in the range −0.3≲cosθc.m.≲0.4. The results of the experiment are compared to constituent models and statistical models.

1 data table

Table 1

No description provided.

INCLUSIVE SPECTRA OF CHARGED HADRONS FROM psi AND psi-prime DECAYS

Aschman, D. ; Coyne, D.G. ; Groom, Donald E. ; et al.

Phys.Rev.D 24 (1981) 66, 1981.

Inspire Record 164674 DOI 10.17182/hepdata.24000

The inclusive charged-hadron momentum spectra from the ψ and ψ′ decays produced in e+e− collisions at SPEAR are presented. The data were obtained with a small solid-angle, single-arm magnetic spectrometer with good particle-identification abilities centered at 90 degrees with respect to the beams. The particle-separated invariant cross sections are compared with data from e+e− collisions at s=4.8 and 7.3 GeV, obtained with the same spectrometer, in order to observe the difference between hadron production at the resonances and in the continuum.

12 data tables

Table 1

AT J/PSI.

Table 2

AT J/PSI.

Table 3

AT J/PSI.

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rivet Analysis
Comparison of $p \bar{p}$ and $p p$ Interactions at $\sqrt{s}=53$-{GeV}

The UA5 collaboration Alpgard, K. ; Ansorge, R.E. ; Asman, B. ; et al.

Phys.Lett.B 112 (1982) 183-188, 1982.

Inspire Record 176647 DOI 10.17182/hepdata.30953

Results are presented from the first p p colliding beam runs at the CERN ISR, using the UA5 streamer chamber detector. p p interactions at s = 53 GeV are compared with pp data taken in the same experiment. The results are in good agreement with extrapolations of low-energy p p data.

5 data tables

Table 1

No description provided.

Table 2

MOMENTS OF MULTIPLICITY DISTRIBUTIONS FOR P P AND P AP. MULT(NAME=DQ) IS <(N-<N>)**Q>**1/Q. MULT(NAME=NQ) IS <N**Q>.

Table 3

Data read from plot.

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CM Energies (GeV)

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The photoproduction of eta mesons at small angles

Cross sections for p p ---> d rho+ from 4.0 to 12.3 gev/c and a search for the delta+

The Photoproduction of Neutral Pions from Protons at Forward Angles in the Resonance Region

Inclusive Muon Production in $e^+ e^-$ Annihilation with $\sqrt{s}$ = 7.3-GeV

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

Fluctuations in Large Angle $\pi^\pm p$ Elastic Scattering

Inclusive Hadron Production in $e^+ e^-$ Annihilation at $\left\langle s\right\ranlge = 53$-{GeV}$^2$

Measurement of Wide Angle Elastic Scattering of Pions and Protons Off Protons

INCLUSIVE SPECTRA OF CHARGED HADRONS FROM psi AND psi-prime DECAYS

rivet Analysis
Comparison of $p \bar{p}$ and $p p$ Interactions at $\sqrt{s}=53$-{GeV}