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Polarization of $\Lambda^\prime$s and $\bar{\Lambda}$-primes in $P P$, $\bar{P} P$, and $K^- P$ Interactions at 176-{GeV}/c

Gourlay, S.A. ; Melanson, H.L. ; Abolins, M.A. ; et al.
Phys.Rev.Lett. 56 (1986) 2244-2247, 1986.
Inspire Record 232417 DOI 10.17182/hepdata.20240

We have measured the polarization of Λ's in inclusive pp and K−p reactions and of Λ¯'s in p¯p interactions at a beam momentum of 176 GeV/c. Data were taken in the beam-fragmentation region with hyperon transverse momenta from 0.2 to 1.5 GeV/c. The P¯ produced Λ¯'s have the same magnitude and sign of polarization as the p-produced Λ's, whereas the Λ's from K−p interactions are more highly polarized and in the opposite direction.

3 data tables
Table 1

No description provided.

Table 2

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Table 3

No description provided.


Inclusive Production of $K^0_S$, $\Lambda$ and $\bar{\Lambda}$ in $\bar{p} p$ Interactions at 3.6-{GeV}/$c$

Banerjee, S. ; Ganguli, S.N. ; Malhotra, P.K. ; et al.
Nucl.Phys.B 150 (1979) 119-140, 1979.
Inspire Record 131498 DOI 10.17182/hepdata.34804

We present a study of the inclusive reactions p p → K S 0 X, ΛX and Λ X at 3.6 GeV/ c based on 35.4 events/μb. The cross sections are presented in terms of the Feynman variable, rapidity and the transverse momentum. The absolute value of the Λ polarization is found to increase with increasing p T of Λ. A comparison of the inclusive productions of K S 0 in p p and e + e − is presented.

3 data tables
Table 1

No description provided.

Table 2

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Table 3

OTHER DATA AT PLAB=5.7 AND 12. GEV/C. ALSO INCLUDED.


LAMBDA POLARIZATION IN INCLUSIVE K- p INTERACTIONS AT 10-GeV/c AND 16-GeV/c

The Aachen-Berlin-CERN-London-Vienna collaboration Grassler, H. ; Honecker, R. ; Laven, H. ; et al.
Nucl.Phys.B 136 (1978) 386, 1978.
Inspire Record 129719 DOI 10.17182/hepdata.35096

A strong negative transverse polarization P z is found for forward produced lambdas observed in 10 and 16 GeV/ c K − p interactions. This indicates that exchanges of natural spin-parity are dominant in the production process. Using the polarization results, the d σ d u′ distributions for natural and unnatural spin-parity exchanges are derived. For unnatural exchanges, a dip is observed at u ′≅0.3 GeV 2 , which can be explained as a nonsense-wrong-signature zero of the N β trajectory. The value of P z for forward producted lambdas is constant with energy. This is in agreement with the triple-Regge model prediction, as is the fact that P z is constant as a function of M 2 s . The two non-transverse polarization components, P x and P y , have been measured and are found to be consistent with zero for all x values, unlike P z .

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Lambda Polarization in the Reaction K- p --> Lambda Anything at 14.3-GeV/c

Abramowicz, H. ; Barloutaud, R. ; Borg, A. ; et al.
Nucl.Phys.B 105 (1976) 222-228, 1976.
Inspire Record 100450 DOI 10.17182/hepdata.35865

New results on inclusive lambda polarization in K − p interactions at 14.3 GeV/ c are presented. At the kaon fragmentation vertex, the polarization is compared to that from inclusive experiments at lower momenta and to that from two-body reactions with a Λ. As predicted by the triple-Regge model with N α (or N γ ) exchange, the polarization is found to be independent of s and M X 2 / s . In particular it has the same value as that found in the two-body reactions.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


A Study of Inclusive xi- Production from K- p Interaction at 4.2-GeV/c

The Amsterdam-CERN-Nijmegen-Oxford collaboration Ganguli, S.N. ; Berge, J.P. ; Gavillet, P. ; et al.
Nucl.Phys.B 128 (1977) 408-420, 1977.
Inspire Record 111753 DOI 10.17182/hepdata.36076

A study of inclusive Ξ − production from a high statistics K − p experiment at 4.2 GeV/ c has been made. The total Ξ − production cross section is 157 ± 8 μ b. Approximately 15% of the Ξ − arise from decay of the Ξ ∗0 (1530) resonance. The polarization of the Ξ − is found to be negative and is nearly equal in value to that of the Λ 0 from the inclusive reaction K − + p → Λ 0 + anything. An analysis of the inclusive production of Ξ − has been made in the framework of the triple-Reege formalism.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Polarisation of recoil neutrons from single-pion photoproduction off protons in the resonance region

Hahn, U. ; Wallraff, W. ; Weingarten, W. ;
BONN-PI-1-143, 1971.
Inspire Record 1498199 DOI 10.17182/hepdata.75407

None

1 data table
Table 1

No description provided.


Measurement of the polarization of the backscattered neutron from the reaction gamma p -> pi n in the region of the second resonance

Wallraff, Wolfgang ;
BONN-PI-1-162, 1972.
Inspire Record 1498200 DOI 10.17182/hepdata.75411

None

1 data table
Table 1

No description provided.


Mesure de la polarisation du proton de recul dans la diffusion élastique pi+- p entre 550 et 1025 MeV

Yonnet, Jacques ;
CNRS-A-O-4171, 1970.
Inspire Record 1187688 DOI 10.17182/hepdata.1304

None

6 data tables
Table 1

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Table 2

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Measurement of the polarization parameter in $\pi^{pm}p$ scattering from 356 to 519 MeV/c

Gorn, W. ;
LBL-1320, 1973.
Inspire Record 923202 DOI 10.17182/hepdata.1150

None

8 data tables
Table 1

No description provided.

Table 2

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Table 3

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Pi- p elastic scattering between 1.7 and 2.5 gev/c

Hill, R.E. ; Booth, N.E. ; Esterling, R.J. ; et al.
Phys.Rev.D 1 (1970) 729-758, 1970.
Inspire Record 61850 DOI 10.17182/hepdata.4893

The polarization and the differential cross section in π−p elastic scattering have been measured at incident pion laboratory momenta of 1.70, 1.88, 2.07, 2.27, and 2.50 GeV/c. The experiment was carried out at the Argonne zero-gradient synchrotron with a polarized proton target. Details of the apparatus and data analysis are presented here together with the final results. A partial-wave analysis of the data has verified the JP=72+ assignment for the Δ(1950) and established a JP=72− assignment for the N(2190). It does not support a JP=112+ assignment for the Δ(2460), nor does it give support for some of the possible resonances found in the CERN phase-shift analysis. Apart from the resonance behavior, the partial-wave analysis reveals several new features. We find a striking correlation among the various partial-wave amplitudes at the highest energy, which is different for J=l+12 and J=l−12. In addition, several fixed-(−t) features of high-energy scattering emerge in the energy region of this analysis.

12 data tables
Table 1

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Table 2

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Table 3

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