CUSP IN PI- P ELASTIC SCATTERING AT THE ETA THRESHOLD

Sarma, H.N.K. ; Binnie, D.M. ; Carr, J. ; et al.
Nucl.Phys.B 161 (1979) 1-13, 1979.
Inspire Record 147683 DOI 10.17182/hepdata.34612

We present results from a high momentum resolution measurement of the π − p elastic differential cross section near the η production threshold. By analysing the cusp discontinuity in the elastic cross section we deduce the non-spin-flip elastic amplitude and compare it with solutions from phase-shift analyses.

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$\pi^{-}+ p$ elastic scattering at 1 200 MeV

Bertanza, L. ; Carrara, R. ; Drago, A. ; et al.
Nuovo Cim. 19 (1961) 467-481, 1961.
Inspire Record 1184999 DOI 10.17182/hepdata.1109

A bubble chamber investigation of π−+p elastic scattering at 1 200 MeV (K.E.) is reported. The total and differential cross-sections are determined. By extrapolation of the angular distribution, the 0° cross-section is derived and compared with the results obtained with the help of the dispersion relations and the optical theorem. The forward peak is investigated in terms of diffraction scattering and a value for the optical radius is derived.

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Backward pi- p Reactions Between 0.6-GeV/c and 1-GeV/c

Debenham, N.C. ; Binnie, D.M. ; Camilleri, L. ; et al.
Phys.Rev.D 12 (1975) 2545-2556, 1975.
Inspire Record 104820 DOI 10.17182/hepdata.24845

Measurements are reported of the differential cross section for the reaction π−p→π−p,π0n,andηn at three angles close to 180° and for incident momenta in the range 0.6 to 1.0 GeV/c. The three measurements were made simultaneously at 1% intervals of beam momentum. The data on elastic scattering resolve a discrepancy between two earlier experiments. They also show clearly the effect of the opening of the ηn channel. The charge-exchange data show that I-spin bounds are not violated in the kinematic region covered. The ηn data can be adequately described with known s-channel resonances. No evidence for narrow N*'s is seen in any channel.

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K- p elastic and charge-exchange scattering in the center-of-mass energy range 1915-2168 mev

Litchfield, P.J. ; Bacon, T.C. ; Butterworth, I. ; et al.
Nucl.Phys.B 30 (1971) 125-156, 1971.
Inspire Record 68612 DOI 10.17182/hepdata.33440

Total and differential cross sections are presented for the reactions K − p → K − p and K − p → K o n at 13 points in the c.m. energy range 1915–2168 MeV. An energy-dependent partial-wave analysis is carried out on these data together with the polarisation measurements of Daum et al. [1] and the total cross section measurements [2] within this energy range. The well known Σ(1915), Σ(2030) and Λ(2100) are observed and their resonance parameters measured. Structure is also found in the D 05 and F 07 waves. An SU(3) analysis of the 5 2 + octet, 7 2 + decuplet and 7 2 − singlet gives generally good agreement between theory and experiment except that the elasticity of the Σ(1915) is experimentally rather larger than predicted.

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DETERMINED BY NORMALIZING AT ZERO DEG TO TOTAL CROSS SECTIONS VIA THE OPTICAL THEOREM.

THE MAXIMUM VALUE OF COS(THETA) VARIED BETWEEN 0.978 AND 0.988 (SEE TABLE 3).


ELASTIC SCATTERING AND OMEGA MESON PRODUCTION NEAR THE THRESHOLD OF PI- P ---> OMEGA N

Karami, H. ; Carr, J. ; Debenham, N.C. ; et al.
Nucl.Phys.B 154 (1979) 503-518, 1979.
Inspire Record 146573 DOI 10.17182/hepdata.34745

Measurements are reported of the differential cross section for the reaction π − +p→ ω +n from threshold to a final-state c.m. momentum P ∗ of 200 MeV /c . The previously reported fall in total cross section σ/P ∗ below about 100 MeV/ c is again seen. The differential cross section remains close to isotropic over the entire range. A paralle experiment on the variation in the elastic differential cross section across the threshold shows evidence of this threshold. The elastic data cover a range of incident moments from 1010 to 1180 MeV/ c in steps of 5 MeV/ c .

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pi--p Interactions at 683 MeV/c

Burnstein, R.A. ; Charlton, G.R. ; Day, T.B. ; et al.
Phys.Rev. 137 (1965) B1044-B1052, 1965.
Inspire Record 944965 DOI 10.17182/hepdata.983

Interactions of 683-MeV/c negative pions with protons were investigated using the BNL 14-in. hydrogen bubble chamber in a 17-kG field. Two thousand elastic scatterings were analyzed, yielding a cross section of 18.9±1.0 mb. No evidence for powers of cosθ higher than the second was observed in the elastic angular distribution. The angular distribution obtained was dσdω=(0.384±0.026)+(1.70±0.06)cosθ+(3.36±0.11)cos2θ mb/sr. The single-pion production reactions π−+p→π−+π0+p and π−+p→π−+π++n were studied in detail. A total of 441 π0 productions and 833 π+ productions were analyzed giving cross sections of 3.99±0.50 and 7.50±0.80 mb, respectively. The differential distributions for these inelastic processes are presented and compared with the predictions of the model of Olsson and Yodh. The distribution of events on the Dalitz plots for π0 production is accounted for by the model. However, for the π+ reaction, the model (so far developed) does not describe adequately the distribution of events on the Dalitz plot. In particular, the model fails to account for the enhancement at high (π+π−) effective masses in ππ mass distribution. The center-of-mass angular distributions for π0 and π+ production reactions are presented and compared with the model.

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New High Statistics Data on $K^- p \to$ Two-body Final States Over the Center-of-mass Energy Range 1720-{MeV} to 1796-{MeV}

Cameron, W. ; Franek, B. ; Gopal, G.P. ; et al.
Nucl.Phys.B 193 (1981) 21-52, 1981.
Inspire Record 156542 DOI 10.17182/hepdata.2930

Data are presented from a high statistics bubble chamber experiment to K − p interactions over the c.m. energy range 1720 to 1796 MeV. Channel cross sections, differential cross sections and, where appropriate, polarisation distributions have been obtained for the final states K − p , K 0 n , π 0 Λ and π ± Σ ∓ . These data are compared with those from previously published experiments and with the predictions from the RL-IC 77 partial-wave amplitudes for each of these channels.

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EXTRAPOLATED FORWARD AND BACKWARD DIFFERENTIAL CROSS SECTIONS.

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K- p Reactions from 0.96-GeV/c to 1.355-GeV/c Involving Two-Body Final States

The Rutherford-London collaboration Conforto, B. ; Gopal, G.P. ; Kalmus, G.E. ; et al.
Nucl.Phys.B 105 (1976) 189-221, 1976.
Inspire Record 2769 DOI 10.17182/hepdata.8717

Data are presented from a high statistics bubble chamber experiment to study K − p interactions in the c.m. energy range 1775 to 1957 MeV. For the reactions K − p → K − p, K − p → K 0 n , K − p → Λπ 0 and K − p → Σ ± π ∓ channel cross sections, differential cross sections and, where appropriate, polarisation distributions have been obtained. The channel cross sections for K − p → Σ 0 π 0 are presented. In general the results are in agreement with those previously published although a significant discrepancy has been found in the Σ ± π ∓ cross sections at the lower energies. New measurements of the Σ ± lifetimes have also been obtained ( τ Σ − = 1.49 ± 0.03 × 10 −10 sec, τ Σ + = 0.807 ± 0.013 × 10 −10 sec).

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THE FORWARD DIFFERENTIAL CROSS SECTION IS THE EXTRAPOLATED VALUE OF THE LEGENDRE POLYNOMIAL FIT.

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HIGH-ENERGY pi- p ELASTIC SCATTERING FOR SMALL MOMENTUM TRANSFERS AND FORWARD DISPERSION CALCULATIONS

Saxer, Howard I. ;
UM-03106-19-T, 1964.
Inspire Record 1101967 DOI 10.17182/hepdata.37884

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DIFFERENTIAL ELASTIC PION-PROTON SCATTERING AT 600-MEV, 650-MEV and 750-MEV

Shonle, John I. ;
UCRL-9362, 2006.
Inspire Record 44234 DOI 10.17182/hepdata.154

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