Botje, M.
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Measurement of Small Angle anti-Proton - Proton and Proton Proton Elastic Scattering at the CERN Intersecting Storage Rings

Amos, Norman A. ; Block, M.M. ; Bobbink, G.J. ; et al.
Nucl.Phys.B 262 (1985) 689-714, 1985.
Inspire Record 214689 DOI 10.17182/hepdata.33711

Antiproton-proton and proton-proton small-angle elastic scattering was measured for centre-of-mass energies s =30.6, 52.8 and 62.3 GeV at the CERN Intersectung Storage Rings. In addition, proton-proton elastic scattering was measured at s =23.5 GeV . Using the optical theorem, total cross sections are obtained with an accuracy of about 0.5% for proton-proton scattering and about 1% for antiproton-proton scattering. The measurement of the interference of the Coulomb scattering and the hadronic scattering permits a determination of the ratio of the real-to-imaginary part of the forward hadronic scattering amplitude. Also presented are measurements of the hadronic slope parameter.

13 data tables match query
Table 1

No description provided.

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Comparison of Small Angle p$ \Bar{$p$}$ and p p Elastic Scattering at the {CERN} Intersecting Storage Rings

Amos, Norman A. ; Block, M.M. ; Bobbink, G.J. ; et al.
Phys.Lett.B 128 (1983) 343-348, 1983.
Inspire Record 190335 DOI 10.17182/hepdata.30667

Antiproton-proton and proton-proton small-angle elastic scattering have been measured for centre-of-mass energies √ s = 30.7 and 62.5 GeV at the CERN Intersecting Storage Rings (ISR). Antiproton-proton and proton-proton total cross sections are obtained using the optical theorem. The measurement of the Coulomb scattering and its interference with the nuclear scattering allows a determination of the ratio of the real-to-imaginary part of the forward nuclear scattering amplitude. Also presented are measurements for the nuclear slope parameter at √ s = 62.5 GeV. Our new results reinforce the conclusions drawn recently from our measurements at √ s = 52.8 GeV. In particular, the pp̄ total cross section is rising at ISR energies and should continue to rise well beyond these energies.

4 data tables match query
Table 1

DATA REQUESTED FROM AUTHORS.

Table 2

RESULTS OF FITS.

Table 3

RESULTS OF FITS.

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Comparison of p$ \Bar{$p$}$ and p p Elastic Scattering at $S^{(1/2)}=52$.8-{GeV}

Amos, Norman A. ; Block, M. ; Bobbink, G. ; et al.
Phys.Lett.B 120 (1983) 460-464, 1983.
Inspire Record 181387 DOI 10.17182/hepdata.30816

Proton-antiproton and proton-proton elastic scattering have been measured in the four-momentum transfer range 0.001⩽| t |⩽0.06 GeV 2 for center-of-mass energy 52.8 GeV at the CERN Intersecting Storage Rings (ISR). Using the known pp total cross section, a simultaneous fit to the pp̄ and pp differential cross sections yields the pp̄ total cross section; in addition, we obtain the ratio of the real-to-imaginary part of the forward nuclear-scattering amplitude and the nuclear-slope parameter for both pp̄ and pp. Our results show conclusively that the pp̄ total cross section is rising at ISR energies and lend support to conventional theories in which the difference between the pp̄ and pp total cross section vanishes at very high energy.

5 data tables match query
Table 1

No description provided.

Table 2

RESULTS OF FIT.

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Measurement of the Real to Imaginary Ratio of the $\bar{P} P$ Forward Amplitude at Beam Momenta Between 400-{GeV}/c and 730-{MeV}/c

Iwasaki, H. ; Aihara, H. ; Chiba, J. ; et al.
Phys.Lett.B 103 (1981) 247-250, 1981.
Inspire Record 170359 DOI 10.17182/hepdata.31184

Differential cross sections of p p forward elastic scattering were measured between 400 and 730 MeV/ c , and the real-to-imaginary ratio, ϱ, of the forward amplitude was deduced. We found that ρ increases from ∼ 0.1 to ∼ 0.4 in this momentum range. A dispersion-relation analysis shows the existence of a pole-like structure in the real part of the p p amplitude near threshold.

1 data table match query
Table 1

REAL/IMAG RATIO OF FORWARD AMPLITUDE DETERMINED FROM FIT TO COULOMB-NUCLEARINTERFERENCE.


A MEASUREMENT OF THE ANTI-P P DIFFERENTIAL ELASTIC CROSS-SECTION AND OF THE COULOMB - NUCLEAR INTERFERENCE BETWEEN 353-MEV/C AND 578-MEV/C

Cresti, M. ; Peruzzo, L. ; Sartori, G. ;
Phys.Lett.B 132 (1983) 209-213, 1983.
Inspire Record 200209 DOI 10.17182/hepdata.30632

We have measured the p p differential elastic cross section at 8 momenta from 353 to 578 MeV/ c , determining, for each momentum, the ratio ρ of the real to imaginary parts of the elastic forward amplitude, the slope b of the elastic cross section and the total p p cross section σ. Our results are compared with previous experimental results and with theoretical predictions.

3 data tables match query
Table 1

No description provided.

Table 2

No description provided.

Table 3

Numerical values supplied by M. Cresti.


Real to Imaginary Ratio of the $\bar{p} p$ Forward Elastic Scattering Amplitude in the Momentum Range Between 180-{MeV}/$c$ and 590-{MeV}/$c$

Bruckner, W. ; Dobbeling, H. ; Guttner, F. ; et al.
Phys.Lett.B 158 (1985) 180-185, 1985.
Inspire Record 213992 DOI 10.17182/hepdata.30392

The real-to-imaginary ratio of the p p forward elastic scattering amplitude has been measured at the LEAR facility of CERN by the Coulomb-nuclear interference method at seven beam momenta between 181 and 590 MeV/ c . The ratio is positive at 590 MeV/ c , becomes negative below 500 MeV/ c , reaches a minimum at 260 MeV/ c and then crosses zero again at about 230 MeV/ c .

3 data tables match query
Table 1

No description provided.

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Measurement of rho, the ratio of the real to imaginary part of the anti-p p forward elastic scattering amplitude, at S**(1/2) = 1.8-TeV

The E710 collaboration Amos, Norman A. ; Avila, C. ; Baker, W.F. ; et al.
Phys.Rev.Lett. 68 (1992) 2433-2436, 1992.
Inspire Record 320369 DOI 10.17182/hepdata.42565

We have measured ρ, the ratio of the real to the imaginary part of the p¯p forward elastic-scattering amplitude, at √s =1.8 TeV. Our result, ρ=0.140±0.069, is compared with extrapolations from lower-energy data based on dispersion relations, and with the UA4 value at √s =546 GeV.

2 data tables match query
Table 1

Results of least square's fit to the distribution.

Table 2

Total cross section from fit to data.


Measurement of Anti-proton - Proton Small Angle Elastic Scattering at Low Momentum

Linssen, L. ; Beard, C.I. ; Birsa, R. ; et al.
Nucl.Phys.A 469 (1987) 726, 1987.
Inspire Record 245092 DOI 10.17182/hepdata.37014

Two high statistics measurements of antiproton-proton small-angle elastic scattering, at p = 233 MeV/ c and p = 272 MeV/ c , are presented. The measurements were carried out at the LEAR facility at CERN. By the Coulomb-nuclear interference method, values are obtained for the real-to-imaginary ratio ρ of the p̄p forward nuclear scattering amplitude and for its exponential slope b : ρ = + 0.041 ± 0.026 and b = 71.5 ± 4.5 (GeV/ c ) −2 at 233 MeV/ c and ρ = −0.014 ± 0.027 and b = 47.7 ± 2.7 (GeV/ c ) −2 at 272 MeV/ c . The method to derive these values is discussed in detail and so are the uncertainties contributing to their systematic error. The results are compared with predictions from forward dispersion relation calculations and with predictions from p̄p potential models.

3 data tables match query
Table 1

The corrected cross section is the measured divided by the average folding correction given in the paper.

Table 2

The corrected cross section is the measured divided by the average folding Correction given in the paper.

Table 3

Fits to data use the value of total cross sections of 263 & 296 mb for 272 & 233 Mev respectively derived from the authors total cross sections measurement. ETA is the spin dependence parameter.


A precise measurement of the real part of the elastic scattering amplitude at the Sp(bar)pS.

The UA4/2 collaboration Augier, C. ; Bernard, D. ; Bourotte, J. ; et al.
Phys.Lett.B 316 (1993) 448-454, 1993.
Inspire Record 358433 DOI 10.17182/hepdata.28818

A precise measurement of p̄p elastic scattering in the Coulomb-strong interaction interference region was performed at the CERN Sp̄pS Collider at a centre-of-mass energy of 541 GeV. The ratio of the real to the imaginary part of the forward elastic scattering amplitude was found to be ρ = 0.135 ± 0.015. The slope of the exponential fall off of the strong interaction part was also measured to be b = 15.5 ± 0.1 GeV −2 .

2 data tables match query
Table 1

No description provided.

Table 2

Real part of amplitude extracted using a more precise UA4 measurement. (1 +RE(AMP)/IM(AMP)**2)SIG(TOT) = 63.5 +- 1.5 MB (Bozzo et al. PL 147B(1984)392).


The Real Part of anti-p p Forward Elastic Scattering Amplitude at 0.7-GeV/c

Kaseno, H. ; Hamatsu, R. ; Kawano, K. ; et al.
Phys.Lett.B 61 (1976) 203-206, 1976.
Inspire Record 3400 DOI 10.17182/hepdata.27693

The differential cross sections of p p elastic scattering at 0.7 GeV/ c were obtained in the range 0.0018<| t |⩽0.0320 GeV 2 . From the interference between the Coulomb and the nuclear amplitude, the ratio of real to imaginary part of the forward nuclear amplitude was found to be +0.33±0.04.

3 data tables match query
Table 1

No description provided.

Table 2

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Table 3

FIT FOR FORWARD NUCLEAR AMPLITUDE IN COULOMB INTERFERENCE REGION.