The Real Part of the Forward Elastic Nuclear Amplitude for $p p$, $\bar{p} p$, $\pi^{+} p$, $\pi^{-} p$, $K^{+} p$, and $K^{-} p$ Scattering Between 70-GeV/c and 200-GeV/c

Fajardo, L.A. ; Majka, R. ; Marx, J.N. ; et al.
Phys.Rev.D 24 (1981) 46, 1981.
Inspire Record 152596 DOI 10.17182/hepdata.24028

We have measured the elastic cross section for pp, p¯p, π+p, π−p, K+p, and K−p scattering at incident momenta of 70, 100, 125, 150, 175, and 200 GeV/c. The range of the four-momentum transfer squared t varied with the beam momentum from 0.0016≤−t≤0.36 (GeV/c)2 at 200 GeV/c to 0.0018≤−t≤0.0625 (GeV/c)2 at 70 GeV/c. The conventional parametrization of the t dependence of the nuclear amplitude by a simple exponential in t was found to be inadequate. An excellent fit to the data was obtained by a parametrization motivated by the additive quark model. Using this parametrization we determined the ratio of the real to the imaginary part of the nuclear amplitude by the Coulomb-interference method.

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Proton-proton scattering at very small angles at 24 GeV/ c

Lohrmann, E. ; Meyer, H. ; Winzeler, H. ;
Phys.Lett. 13 (1964) 78-80, 1964.
Inspire Record 1392871 DOI 10.17182/hepdata.30656
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Real Part of the Proton Proton Forward Scattering Amplitude from 50 GeV to 400 GeV.

Bartenev, V. ; Carrigan, Richard A. ; Chiang, I-Hung ; et al.
Phys.Rev.Lett. 31 (1973) 1367-1370, 1973.
Inspire Record 81733 DOI 10.17182/hepdata.21379

From measurements of proton-proton elastic scattering at very small momentum transfers where the nuclear and Coulomb amplitudes interfere, we have deduced values of ρ, the ratio of the real to the imaginary forward nuclear amplitude, for energies from 50 to 400 GeV. We find that ρ increases from -0.157 ± 0.012 at 51.5 GeV to +0.039 ± 0.012 at 393 GeV, crossing zero at 280 ± 60 GeV.

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Elastic pp scattering in the region of the coulomb interference at momenta 1.1 - 1.7 GeV/c

Vorob'ev, A.A. ; Denisov, A.S. ; Zalite, Yu.K. ; et al.
JETP Lett. 17 (1973) 108-110, 1973.
Inspire Record 1393129 DOI 10.17182/hepdata.39943
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Measurement of the Real Part of the Proton Proton Forward Scattering Amplitude from 80-GeV to 286-GeV by Means of Silicon Position Sensitive Detectors

Bartenev, V. ; Carrigan, Richard A. ; Cool, R.L. ; et al.
Sov.J.Nucl.Phys. 23 (1976) 400, 1976.
Inspire Record 100255 DOI 10.17182/hepdata.19082
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Interference measurements of the real part of the forward pi- p elastic scattering amplitude at 2.44 and 1.91 gev/c momenta

Vorobev, G.G. ; Govorun, N.N. ; Nomofilov, A.A. ; et al.
Yad.Fiz. 19 (1974) 849-860, 1974.
Inspire Record 95139 DOI 10.17182/hepdata.19252
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Real part of spinless p p-scattering amplitude at zero angle in the energy region from 0.135 to 1.700 gev/c

Amirkhanov, I.V. ; Bystritskii, V.M. ; Vertogradov, L.S. ; et al.
Yad.Fiz. 17 (1973) 1222-1224, 1973.
Inspire Record 85077 DOI 10.17182/hepdata.19177
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Measurements of $\pi^- p$ Forward Elastic Scattering at High-energies

Burq, J.P. ; Chemarin, M. ; Chevallier, M. ; et al.
Phys.Lett.B 109 (1982) 111, 1982.
Inspire Record 166767 DOI 10.17182/hepdata.31011

The differential cross section of π − p scattering has been measured in the energy region 100–345 GeV and in the t -range 0.002<| t |< 0.04 (GeV/ c ) 2 . The real part of the π − p scattering amplitude has been extracted from the data. The results show that the real part continues to increase with energy. The energy dependence of the slope parameter has also been determined. The shrinkage found expressed in terms of the slope of the pomeron trajectory is2 α ′ p =0.23±0.04 (GeV/ c ) −2 . This agrees with the energy dependence found at larger| t |-values.

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Experimental Results on $p p$ Forward Elastic Scattering and the Possibility of Universal Shrinkage of the Hadronic Diffraction Cone

Burq, J.P. ; Chemarin, M. ; Chevallier, M. ; et al.
Phys.Lett.B 109 (1982) 124-128, 1982.
Inspire Record 168617 DOI 10.17182/hepdata.31001

The differential cross section of pp scattering has been measured in the energy region 100–300 GeV and in the t -range 0.002 < | t | < 0.04 (GeV/| c ) 2 . The results on the real part of the scattering amplitude agrees with dispersion relation calculations. We also report on our determination of the slope parameter b together with an analysis of the world data of b for different hadrons and different t -values. It is shown that the data are consistent with the hypothesis of a universal shrinkage of the hadronic diffraction cone at high energies.

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Measurements of $\pi^- p$ Elastic Scattering in the Coulomb Interference Region at High-energies

Burq, J.P. ; Chemarin, M. ; Chevallier, M. ; et al.
Phys.Lett.B 77 (1978) 438-442, 1978.
Inspire Record 131449 DOI 10.17182/hepdata.27428

The differential cross section has been measured at 30, 50, 80, 100, 120 and 140 GeV/ c for 0.002 < | t | < 0.04 ( GeV / c ) 2 . The results show that the π − p real part goes from negative to positive values below 80 GeV/ c . The slope parameter in the t -region measured is significantly higher than what has been found − t = 0.2 (GeV/ c ) 2 .

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Elastic p p-scattering in the coulomb interference region in the momentum range 1.1 to 1.7 gev/c

Vorobyov, A.A. ; Denisov, A.S. ; Zalite, Yu.K. ; et al.
Phys.Lett.B 41 (1972) 639-641, 1972.
Inspire Record 85047 DOI 10.17182/hepdata.28216

Differential cross-sections for pp elastic scattering in the transfer momentum range 2 x 10 −3 ⩽ | t | ⩽ x 8 10 −3 (GeV/ c ) 2 were studied with a hydrogen filled ionization chamber which was used as a target and as a detector of the recoiled protons. The measurements have been done at P lab . = 1.11 GeV/ c , 1.28 GeV/ c , 1.34 GeV/ c , 1.40 GeV/ c and 1.70 GeV/ c . The real part of the spin independent forward scattering amplitude has been determined, the results being in agreement with the dispersion relation calculations.

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The Real Part of the Forward Proton Proton Scattering Amplitude Measured at the CERN Intersecting Storage Rings

Amaldi, U. ; Cocconi, G. ; Diddens, A.N. ; et al.
Phys.Lett.B 66 (1977) 390-394, 1977.
Inspire Record 110800 DOI 10.17182/hepdata.27584

The real part of the proton proton elastic scattering amplitude has been determined from its interference with the Coulomb amplitude at total centre-of-mass energies up to 62 GeV. The observed steady increase of ϱ with energy indicates that the total proton proton cross section continues to increase well beyond this energy.

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Measurement of the Real Part of the Forward Scattering Amplitude in K+- p Elastic Scattering at 10.4-GeV/c and 14-GeV/c

Carnegie, R.K. ; Cashmore, R.J. ; Davier, M. ; et al.
Phys.Lett.B 59 (1975) 308-312, 1975.
Inspire Record 100638 DOI 10.17182/hepdata.48091

The differential cross section for K ± p elastic scattering has been measured in the very low t region (0.003 < t < 0.2 GeV 2 ) in a wire chamber spectrometer experiment at 10.4 and 14 GeV/ c . The interference effect observed between the Coulomb and the nuclear interaction has been used to determine α, the ratio of real to imaginary part of the forward scattering amplitude. At 10.4 GeV/ c we measure α (K + p) = −0.21 ± 0.06 and α (K − p = 0.08 ± 0.04, and at 14 GeV/ c , α (K + p) = − 0.13 ± 0.03 and α (K − p) = 0.000 ± 0.04 in agreeement with the predictions of dispersion theory calculation.

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FORWARD pi- p ELASTIC SCATTERING AT 40-GeV/c

Apokin, V.D. ; Matulenko, Yu.A. ; Nurushev, S.B. ; et al.
Sov.J.Nucl.Phys. 28 (1978) 786, 1978.
Inspire Record 130964 DOI 10.17182/hepdata.18967
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Study of pi- Meson Elastic Scattering by Protons at Small Angles

Apokin, V.D. ; Derevshchikov, A.A ; Matulenko, Yu.A. ; et al.
Yad.Fiz. 21 (1975) 1240-1246, 1975.
Inspire Record 103333 DOI 10.17182/hepdata.19099
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Elastic pi+ p, K+ p and p p Scattering in the Region of Coulomb-Nuclear Interference at Momenta 42.5-GeV/c and 52.2-GeV/c

Apokin, V.D. ; Vasiliev, A.N. ; Derevshchikov, A.A. ; et al.
Yad.Fiz. 25 (1977) 94-102, 1977.
Inspire Record 108613 DOI 10.17182/hepdata.19035
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Measurement of the Real Part of the Forward Scattering Amplitude in K+- p Elastic Scattering Between 0.9-GeV/c and 2.6-GeV/c

Baillon, P. ; Bricman, C. ; Ferro-Luzzi, M. ; et al.
Phys.Lett.B 50 (1974) 377-382, 1974.
Inspire Record 89483 DOI 10.17182/hepdata.27960

The differential cross section for K ± p elastic scattering has been measured in the forward meson direction (0.0008 < t < 0.1 GeV 2 ) in an electronics experiment at incident momenta between 0.9 and 2.06 GeV/ c . The high statistics and absolute normalisation of the data allow a good determination of the real part of the forward nuclear scattering amplitude by means of the Coulomb-nuclear interference effect.

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Measurement of the Ratio Between the Real and the Imaginary Part of the K- p Forward Scattering Amplitude at 14.3-GeV/c

De Boer, R.J. ; Van Dam, Piet ; Meijer, R.W. ; et al.
Nucl.Phys.B 106 (1976) 125-135, 1976.
Inspire Record 113577 DOI 10.17182/hepdata.35923

Elastic scattering of 14.3 GeV/ c K − with protons has been analyzed in the | t | region between 0.005 and 0.550 (GeV/ c ) 2 . The ratio α between the real and the imaginary part of the elastic forward scattering amplitude is found to be α =+0.056 ± 0.052. The slope parameters A and B in the expression d σ /d| t | ∞ exp( At + Bt 2 ) are A = 8.47 ± 0.20 (GeV/ c ) −2 and B = 1.82 ± 0.52 (GeV/ c ) −4 .

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Measurement of the real part of the k- p elastic scattering amplitude at 10 gev/c

Campbell, J.R. ; Cocconi, V.T. ; Duinker, P. ; et al.
Nucl.Phys.B 64 (1973) 1-13, 1973.
Inspire Record 94948 DOI 10.17182/hepdata.32421

Bubble chamber film of 10 GeV/ c K − p interactions was scanned automatically by an H.P.D. to look for small angle scatters in the | t |-range from 0.008 to 0.1 GeV 2 . Combining the 1800 events so obtained with 22 000 elastic events obtained from normal scanning (| t | > 0.06 GeV 2 ), the real part of the elastic scattering amplitude was found to be (+25 ± 10)% of the imaginary part. Evidence is found for a change in slope in the differential cross-section distribution, from 9.8 ± 0.6 GeV −2 in the | t |-range below 0.1 GeV 2 to 7.1 ± 0.2 GeV −2 in the range 0.12 < | t | ⩽ 0.4 GeV 2 .

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Pi+ p elastic scattering at 3.6 gev/c

Macnaughton, J. ; Butler, W.R. ; Coyne, D.G. ; et al.
Nucl.Phys.B 33 (1971) 101-108, 1971.
Inspire Record 68509 DOI 10.17182/hepdata.33221

The elastic scattering of 3.6 GeV/ c π + mesons by protons has been studied in a hydrogen bubble chamber experiment. The elastic cross section has a measured value of 7.07 ± 0.20 mb. The forward diffraction peak has been fitted in the region 0.05 ≦ − t ≦ 0.6 (GeV/ c ) 2 by a form (d σ /d t ) = Ae Bt , where A = 46.5 ± 1.8 mb/(GeV/ c ) 2 and B = 6.85 ± 0.20 (GeV/ c ) −2 . From this fit and the optical theorem, the magnitude of the ratio of real to imaginary forward amplitude is 0.39 ± 0.06, in reasonable agreement with dispersion relation calculations and simple Regge model predictions.

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Small angle proton proton elastic scattering from 9 to 70 gev/c

Beznogikh, G.G. ; Bujak, A. ; Kirillova, L.F. ; et al.
Phys.Lett.B 39 (1972) 411-413, 1972.
Inspire Record 75806 DOI 10.17182/hepdata.28333

Proton-proton elastic scattering has been measured over the four-momentum transfer squared 0.0007 ⩽ t ⩽ 0.02 GeV 2 /c 2 . A gas hydrogen jet has been used as an internal target of the accelerator. The results indicate that the ratio of the real to the imaginary part of the proton-proton forward scattering amplitude rises smoothly with increasing energy from α = −0.35 ± 0.05 at p = 9.39 GeV/ c to α = −0.092 ± 0.011 at p = 69.8 GeV/ c .

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pi- Meson Elastic Scattering on Proton in the Coulomb-Nuclear Interference Region for Momentum Range from 33-GeV/c Up to 60-GeV/c

Apokin, V.D. ; Vasiliev, A.N. ; Derevshchikov, A.A. ; et al.
Sov.J.Nucl.Phys. 24 (1976) 49, 1976.
Inspire Record 99591 DOI 10.17182/hepdata.35863
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Investigation of elastic proton proton scattering in the coulomb and nuclear interference region in the energy range 8-70 gev.

Bartenev, V.D. ; Beznogikh, G.G. ; Buyak, A. ; et al.
Yad.Fiz. 16 (1972) 96-108, 1972.
Inspire Record 75989 DOI 10.17182/hepdata.19248
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Slope parameter and ratio of the real to the imaginary part of the forward amplitude of the elastic proton proton scattering at 30, 50 and 70 gev

Chernev, Kh.M. ; Geshkov, I.M. ; Ikov, N.L. ; et al.
Phys.Lett.B 36 (1971) 266-268, 1971.
Inspire Record 69175 DOI 10.17182/hepdata.28408

The differential cross-sections in the range of four momentum transfer squared from 0.003 to 0.120 (GeV c) 2 were measured at 30, 50 and 70 GeV by using a thin polyethilene target in the internal proton beam of the Serpukhov accelerator. The slope parameter, the ratio of the real to the imaginary part of the forward amplitude and the cross-section in the diffraction cone were measured.

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Elastic $p p$ Scattering in the Coulomb Nuclear Interference Region in (500-{MeV} to 1000-{MeV}) Range

Velichko, G.N. ; Vorobev, A.A. ; Zalite, Yu.K. ; et al.
Sov.J.Nucl.Phys. 35 (1982) 852, 1982.
Inspire Record 168367 DOI 10.17182/hepdata.9291
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