HEPData Search

We have measured the asymmetry of the cross section for γp→π+n from a polarized target at 5 and 16 GeV. The range of four-momentum transfer was 0.02<~−t<~1.0 GeV2. The π+ mesons were produced in a polarized butanol target and detected with the Stanford Linear Accelerator Center 20−GeVc spectrometer. A sizable asymmetry was found at both 5 and 16 GeV, a typical value being -0.6 near −t=0.3 GeV2. A small amount of data on the asymmetry of other photoproduction processes was also obtained.

5 data tables

Table 1

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Measurement of the polarization parameter in k+ p elastic scattering at 1.60, 1.80, 2.11 and 2.31 gev/c

Barnett, B.A. ; Laasanen, A.T. ; Steinberg, P.H. ; et al.

Phys.Lett.B 34 (1971) 655-658, 1971.

Inspire Record 69281 DOI 10.17182/hepdata.28513

The polarization parameter for K + p elastic scattering has been measured at 1.60, 1.80, 2.11 and 3.31 GeV/ c incident momenta over the entire angular range with an emphasis on the backward region. The results in the extreme backward region appear to be small and consistent with zero.

1 data table

Table 1

No description provided.

Polarization parameter in k+- p and anti-p p elastic scattering at 10 and 14 gev/c

Borghini, M. ; Dick, L. ; Olivier, J.C. ; et al.

Phys.Lett.B 36 (1971) 497-500, 1971.

Inspire Record 69141 DOI 10.17182/hepdata.37261

Results on polarization in K − p, K + p and p̄p forward elastic scattering at 10 and 14 GeV/ c are presented.

6 data tables

Table 1

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0- 1/2+ final states in k- p interactions at 3.95 gev/c

Moscoso, L. ; Hubbard, J.R. ; Leveque, A. ; et al.

Nucl.Phys.B 36 (1972) 332-344, 1972.

Inspire Record 75362 DOI 10.17182/hepdata.33015

Final states π − Σ + , π + Σ − , π o Λ and ηΛ were studied for K − p reactions at 3.95 GeV/ c . Cross sections, angular distributions and polarizations are presented. Data for π − Σ + and π o Λ production are compared to the line-reversed πp reactions at the same beam momentum. Baryon-exchange peaks are presented for the Σ + π − , Σ − π + and Λπ o final states.

10 data tables

Table 1

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Amplitude analysis from decay correlations - application to pi- p ---> k*(0) lambda at 3.9 gev/c

Abramovich, M. ; Irving, A.C. ; Martin, Alan D. ; et al.

Phys.Lett.B 39 (1972) 353-357, 1972.

Inspire Record 75784 DOI 10.17182/hepdata.28306

Decay correlation data for π − p → K ∗ Λ at 3.9 GeV /c are analyzed to determine the amplitude structure. We emphasize combinations of observables invariant under rotations between s and t channel frames.

1 data table

Table 1

No description provided.

Polarization in pi+ p ---> k+ sigma+ backward scattering at 3.5 gev/c

Bradamante, F. ; Conetti, S. ; Daum, C. ; et al.

Phys.Lett.B 44 (1973) 202-206, 1973.

Inspire Record 84846 DOI 10.17182/hepdata.28109

In a counter and wire spark chamber experiment with a polarized target, backward kaons were detected, and the Σ + 's identified by a missing-mass technique. An average polarization of −0.08 ± 0.05 was found for −0.2 < u < 0.1 GeV 2 .

1 data table

Table 1

THE MEAN POLARIZATION FOR ALL EVENTS IS -0.08 +- 0.05.

Two-body final states in k- p interactions at 14.3 gev/c

Miller, R.J. ; Paler, K. ; Phelan, J.J. ; et al.

Lett.Nuovo Cim. 6S2 (1973) 491-496, 1973.

Inspire Record 86301 DOI 10.17182/hepdata.37298

None

4 data tables

Table 1

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Table 3

AVERAGED OVER ALL PRODUCTION ANGLES.

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A STUDY OF THE REACTIONS pi- p ---> K* LAMBDA, K* SIGMA AND K* Y1* (1385) AT 3.93-GeV/c

Yaffe, D. ; Abramovich, M. ; Chaloupka, V. ; et al.

Nucl.Phys.B 75 (1974) 365-387, 1974.

Inspire Record 80700 DOI 10.17182/hepdata.32197

We have investigated the final states K ∗0 (890)Σ, K ∗0 (890)Σ 0 and K ∗0 (890) Y 1 ∗0 (1385) produced in π − p interactions at 3.93 GeV/ c . We present the differential cross sections and spin density matrix elements for the resonances as functions of momentum transfer, as well as the gL and Σ 0 polarizations. The Σ 0 polarization is found to be positive and maximal. An amplitude analysis is performed for the K ∗ Λ and K ∗ Σ 0 reactions, and it is found that one natural parity transversity amplitude is dominant for the latter.

14 data tables

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Polarization of Lambda Hyperons from Photoproduction in Hydrogen

Asymmetry and differential cross section for elastic scattering of K- mesons by polarized protons

ASYMMETRY IN pi+ PHOTOPRODUCTION FROM A POLARIZED TARGET AT 5-GeV AND 16-GeV

Measurement of the polarization parameter in k+ p elastic scattering at 1.60, 1.80, 2.11 and 2.31 gev/c

Polarization parameter in k+- p and anti-p p elastic scattering at 10 and 14 gev/c

0- 1/2+ final states in k- p interactions at 3.95 gev/c

Amplitude analysis from decay correlations - application to pi- p ---> k*(0) lambda at 3.9 gev/c

Polarization in pi+ p ---> k+ sigma+ backward scattering at 3.5 gev/c

Two-body final states in k- p interactions at 14.3 gev/c

A STUDY OF THE REACTIONS pi- p ---> K* LAMBDA, K* SIGMA AND K* Y1* (1385) AT 3.93-GeV/c