HEPData Search

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

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).

Anti-proton He-4 interactions at 200-MeV/c

Balestra, F. ; Batusov, Yu.A. ; Bendiscioli, G. ; et al.

Phys.Lett.B 305 (1993) 18-22, 1993.

Inspire Record 362745 DOI 10.17182/hepdata.28940

The differential cross sections for antiproton elastic scattering on 4 He at 192.8 MeV/ c are measured. The annihilation cross section σ a = (377.6 ± 8.0) mb, the elastic cross section σ el = (206.3 ± 6.6) mb and the total p 4 He interaction cross section σ tot = (583.9 ± 10.4) mb are determined. The ratio of the real to imaginary part of the forward p 4 He amplitude is found: π =−0.17± 0.33 0.24 . Partial wave analysis reveals that the S, P and D waves are essential in this energy region.

7 data tables

Table 1

Charged prong multiplicity distributions in pbar HE annihilation.

Table 2

Mean charged particle multiplicity in pbar HE4 annihilations.

Table 3

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

Table 1

Results of least square's fit to the distribution.

Table 2

Total cross section from fit to data.

Passive scalar fluctuations in intermittent turbulence

Crisanti, A. ; Falcioni, M. ; Paladin, G. ; et al.

EPL 14 (1991) 541-546, 1991.

Inspire Record 314520 DOI 10.17182/hepdata.857

We discuss how the spatial intermittency of energy dissipation in 3D fully developed turbulence affects the small-scale statistics of passive scalars. We relate the passive-scalar behaviour to the diffusion properties of particle pairs in turbulent fluids. We thus find the intermittency correction to the -5/3 Obukhov-Corrsin law for the power spectrum of a passive scalar at wavenumber k where molecular diffusion and viscosity play a negligible role (inertial convective subrange). This correction is positive at difference with the negative correction to the -5/3 Kolmogorov law for the energy spectrum. We finally show that the structure functions of passive scalars have scaling exponents linear in the moment order, even in the framework of multifractal models.

3 data tables

Table 1

'1'.

Table 2

'2'.

Table 3

No description provided.

Precise Comparison of Anti-proton - Proton and Proton Proton Forward Elastic Scattering at $\sqrt{s}=24$.3-{GeV}

The UA6 collaboration Breedon, R.E. ; Chapin, T.J. ; Cool, R.L. ; et al.

Phys.Lett.B 216 (1989) 459-465, 1989.

Inspire Record 267044 DOI 10.17182/hepdata.29854

We report results from a measurement of antiproton-proton and proton-proton small-angle elastic scattering at √ s = 24.3 GeV in the range 0.001 ⩽ | t | ⩽ 0.06 (GeV/ c ) 2 . The measurement was performed at the CERN p p Collider by using silicon detectors to observe protons recoiling from a hydrogen cluster-jet target intercepting the stored p and p beams. Fits to the measured differential cross sections yield the ratio of the real to the imaginary part of the forward nuclear scattering amplitude ρ and the nuclear slope parameter b for both p p and pp. We find that the difference Δρ = ρ ( p p ) − ρ( pp ) = 0.031 ± 0.010 agrees with conventional fits and disagrees with the “odderon” fit designed to accommodate the recent UA4 measurement of ρ( p p) at 546 GeV.

3 data tables

Table 1

Data requested from authors.

Table 2

No description provided.

Table 3

Nuclear slopes fixed to world average.

ANTI-PROTON HE-4 ELASTIC SCATTERING AT 600-MEV/C. (IN RUSSIAN)

Batusov, Yu.A. ; Balestra, F. ; Barbieri, Riccardo ; et al.

DUBNA JINR - N7-88 (88,REC.FEB.89) 15-22, 1988.

Inspire Record 271237 DOI 10.17182/hepdata.9316

None

2 data tables

Table 1

No description provided.

Table 2

No description provided.

The Real Part of the Proton - anti-Proton Elastic Scattering Amplitude at the Center-Of-Mass Energy of 546-GeV

The UA4 collaboration Bernard, Denis ; Bozzo, M. ; Braccini, P.L. ; et al.

Phys.Lett.B 198 (1987) 583, 1987.

Inspire Record 249671 DOI 10.17182/hepdata.30077

Proton-antiproton elastic scattering was measured at the CERN SPS Collider at the centr-of-mass energy s =546 GeV in the Coulomb interference region. The data provide information on the phase of the hadronic amplitude in the forward direction. The conventional analysis gives for the ratio ϱ of the real to the imaginary part of the hadronic amplitude the result ϱ =0.24±0.04.

2 data tables

Table 1

Axis error includes +- 0.025/0.025 contribution (Normalisation was fixed using a previous UA4 measurement of the total cross section: sig(name=tot)*(1 + alpha**2)).

Table 2

Best estimate of alpha(rho).

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

Table 1

No description provided.

Table 2

No description provided.

Table 3

Numerical values supplied by M. Cresti.

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Absolute measurements of proton-proton small-angle elastic scattering and total cross section at 10, 19 and 26 GeV/ c

Proton-proton small angle scattering and total cross section of 10.0 GeV⧸c

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

Anti-proton He-4 interactions at 200-MeV/c

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

Passive scalar fluctuations in intermittent turbulence

Precise Comparison of Anti-proton - Proton and Proton Proton Forward Elastic Scattering at $\sqrt{s}=24$.3-{GeV}

ANTI-PROTON HE-4 ELASTIC SCATTERING AT 600-MEV/C. (IN RUSSIAN)

The Real Part of the Proton - anti-Proton Elastic Scattering Amplitude at the Center-Of-Mass Energy of 546-GeV

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