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Polarization of $\Lambda$ Hyperons Produced in the $\pi^-$ Propane Interaction at $P (\pi^-) = 40$-{GeV}/

Dzhmukhadze, S.V. ; Kladnitskaya, E.N. ; Popova, V.M. ; et al.
Sov.J.Nucl.Phys. 33 (1981) 81-83, 1981.
Inspire Record 154889 DOI 10.17182/hepdata.17860

None

1 data table
Table 1

Axis error includes +- 0.0/0.0 contribution (?////).


$\Lambda$ and $\bar{\Lambda}$ Polarization in $K^\pm p$ Interactions at 32-{GeV}/$c$

The French-Soviet & CERN-Soviet collaborations Faccini-Turluer, M.L. ; Barloutaud, R. ; Cochet, C. ; et al.
Z.Phys.C 1 (1979) 19, 1979.
Inspire Record 132913 DOI 10.17182/hepdata.19291

Data on Λ and\(\bar \Lambda \) polarization inK±p interactions at 32 GeV/c are presented. A comparison is made between the results of these two experiments as well as with the data at lower energies. The contribution of the different production mechanisms to the Λ(\(\bar \Lambda \)) polarization are discussed.

2 data tables
Table 1

Data are presented on figures only. DATA NOT ENCODED.

Table 2

No description provided.


Spin Dependence of the Inclusive Reaction $p p$ (Polarized) $\to \pi^0 X$ at 24-{GeV}/$c$ for High $p_T \pi^0$ Produced in the Central Region

Antille, J. ; Dick, L. ; Madansky, L. ; et al.
Phys.Lett.B 94 (1980) 523-526, 1980.
Inspire Record 153785 DOI 10.17182/hepdata.27175

The spin dependence of π 0 inclusive production by 24 GeV/ c protons has been measured using a polarized target for Fhe Feynman x near 0 in the transverse momentum range 1.0 < p T < 2.5 GeV/ c . The results indicate a negative updown asymmetry growing strongly with p T and greater than 50% in absolute value for p T greater than 2 GeV/ c .

1 data table
Table 1

No description provided.


Measurement of the Antilambda polarization in nu/mu charged current interactions in the NOMAD experiment.

The NOMAD collaboration Astier, P. ; Autiero, D. ; Baldisseri, A. ; et al.
Nucl.Phys.B 605 (2001) 3-14, 2001.
Inspire Record 554759 DOI 10.17182/hepdata.48928

We present a measurement of the polarization of Antilambda hyperons produced in nu_mu charged current interactions. The full data sample from the NOMAD experiment has been analyzed using the same V0 identification procedure and analysis method reported in a previous paper for the case of Lambda hyperons. The Antilambda polarization has been measured for the first time in a neutrino experiment. The polarization vector is found to be compatible with zero.

2 data tables
Table 1

Lambdabar polarization in regions of Feynman X (XL).

Table 2

Lambdabar polarization in regions of the Bjorken scaling variable X.


High precision measurement of A in large P(T)**2 spin polarized 24-GeV/c proton proton elastic scattering

Crabb, D.G. ; Kaufman, W.A. ; Krisch, A.D. ; et al.
Phys.Rev.Lett. 65 (1990) 3241-3244, 1990.
Inspire Record 299843 DOI 10.17182/hepdata.19939

We measured the analyzing power A out to P⊥2=7.1 (GeV/c)2 with high precision by scattering a 24-GeV/c unpolarized proton beam from the new University of Michigan polarized proton target; the target’s 1-W cooling power allowed a beam intensity of more than 2×1011 protons per pulse. This high beam intensity together with the unexpectedly high average target polarization of about 85% allowed unusually accurate measurements of A at large P⊥2. These precise data confirmed that the one-spin parameter A is nonzero and indeed quite large at high P⊥2; most theoretical models predict that A should go to zero.

1 data table
Table 1

Errors quoted contain both statistical and systematic uncertainties.


Single Spin Asymmetry in Inclusive Reactions Polarized $P$, $P$ Goes to $\pi^+$, $\pi^-$, and $P$ at High $P$(t) at 13.3-{GeV}/$c$ and 18.5-{GeV}/$c$

Saroff, S. ; Baller, B.R. ; Blazey, G.C. ; et al.
Phys.Rev.Lett. 64 (1990) 995, 1990.
Inspire Record 26394 DOI 10.17182/hepdata.19960

Data are presented for the left-right asymmetry in inclusive production of π+, π−, and p with proton beams (polarized normal to the scattering plane) of 13.3 and 18.5 GeV/c incident on a LH2 target. At both energies the asymmetry in π+ production grows steadily to about 25% near the kinematic limit, whereas the π− and p asymmetries are consistent with zero over the measured range of pt, 1.1–2.2 GeV/c.

18 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

Observation of significant spin effects in hard collisions at 40-GeV/c

Apokin, V.D. ; Arestov, Yu.I. ; Astafev, O.V. ; et al.
Phys.Lett.B 243 (1990) 461-464, 1990.
Inspire Record 303587 DOI 10.17182/hepdata.29694

A single-spin asymmetry in the inclusive π 0 production at small x F was measured. In the experiment 40 GeV/c π − mesons were incident on transversely polarized protons and deutrons. An asymmetry of (40–50)% has been revealed in the hard scattering region.

1 data table
Table 1

No description provided.


The Acceleration of Polarized Protons to 22-{GeV}/$c$ and the Measurement of Spin Spin Effects in $p$ (Polarized) + $p$ (Polarized) $\to p + p$

Khiari, F.Z. ; Cameron, P.R. ; Court, G.R. ; et al.
Phys.Rev.D 39 (1989) 45, 1989.
Inspire Record 262472 DOI 10.17182/hepdata.23245

Accelerating polarized protons to 22 GeV/c at the Brookhaven Alternating Gradient Synchro- tron required both extensive hardware modifications and a difficult commissioning process. We had to overcome 45 strong depolarizing resonances to maintain polarization up to 22 GeV/c in this strong-focusing synchrotron. At 18.5 GeV/c we measured the analyzing power A and the spin-spin correlation parameter Ann in large- P⊥2 proton-proton elastic scattering, using the polarized proton beam and a polarized proton target. We also obtained a high-precision measurement of A at P⊥2=0.3 (GeV/c)2 at 13.3 GeV/c. At 18.5 GeV/c we found that Ann=(-2±16)% at P⊥2=4.7 (GeV/c)2, where it was about 60% near 12 GeV at the Argonne Zero Gradient Synchrotron. This sharp change suggests that spin-spin forces may have a strong and unexpected energy dependence at high P⊥2.

3 data tables
Table 1

No description provided.

Table 2

2.2 GeV point taken from Brown et al., PR D31(85) 3017.

Table 3

No description provided.


Measurement of Spin Effects in $p$ (Polarized) $p$ (Polarized) $\to p p$ at 18.5-{GeV}/$c$

Crabb, D.G. ; Gialas, I. ; Krisch, A.D. ; et al.
Phys.Rev.Lett. 60 (1988) 2351, 1988.
Inspire Record 261135 DOI 10.17182/hepdata.20096

We measured the analyzing power A and the spin-spin correlation parameter Ann in medium-P⊥2 proton-proton elastic scattering, using a polarized-proton target and the 18.5-GeV/c Brookhaven Alternating-Gradient Synchrotron polarized-proton beam. We found sharp dips in both A and Ann, which occur at different P⊥2 values. The unexpected sharp structure in the spin-spin force occurs near P⊥2=2.3 (GeV/c)2 where the elastic cross section has no apparent structure.

1 data table
Table 1

Errors contain both statistics and systematics.


OBSERVATION OF THE ASYMMETRY IN THE REACTION pi- p (polarized) ---> (pi0 pi0) n

Apokin, V.D. ; Belikov, N.I. ; Derevshchikov, A.A. ; et al.
Sov.J.Nucl.Phys. 47 (1988) 465, 1988.
Inspire Record 246899 DOI 10.17182/hepdata.40790

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.