Polarization
Max results
Sort by Reverse order

Showing 10 of 894 results

Measurements of the total cross-section difference Delta sigma-T in n p transmission between 0.86-GeV and 0.94-GeV

Ball, J. ; Chesny, P. ; Combet, M. ; et al.
Z.Phys.C 61 (1994) 53-58, 1994.
Inspire Record 353895 DOI 10.17182/hepdata.14263

We present results of the total cross section differenceΔσТ obtained in transmission measurements at the energies 0.86, 0.88, 0.91 and 0.94 GeV. The SATURNE II polarized beam of free neutrons obtained from the break-up of polarized deuterons was transmitted through the polarized Saclay frozen-spin proton target. The beam and target polarizations were oriented in the vertical direction. The present results agree with previous SATURNE measurements and improve the amplitude analysis in the forward direction.

2 data tables
Table 1

No description provided.

Table 2

Average of this result and data from Fontaine et al. 1991, Nucl.Phys. B358, 297 (<a href=http://durpdg.dur.ac.uk/scripts/reacsearch.csh/TESTREAC/red+2233> RED = 2233 </a>).


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.


SPIN EFFECTS IN CUMULATIVE PRODUCTION OF PROTONS AND DEUTERONS IN PROTON - NUCLEUS INTERACTIONS AT 16-GeV TO 64-GeV

Belyaev, I.M. ; Vlasov, N.V. ; Gavrishchuk, O.P. ; et al.
484-488, 1989.
Inspire Record 285499 DOI 10.17182/hepdata.38741

None

28 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

Analyzing power of the reactions d(pol.) + C --> p + X and d(pol.) + C --> p + p (d) + X at energies of 0.6-GeV/nucleon to 2.1-GeV/nucleon.

Beznogikh, G.G. ; Budilov, V.A. ; Filipkowski, A. ; et al.
Sov.J.Nucl.Phys. 54 (1991) 812-818, 1991.
Inspire Record 324762 DOI 10.17182/hepdata.17238

None

14 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

Analyzing power measurement of p p elastic scattering in the Coulomb - nuclear interference region with the 200-GeV/c polarized proton beam at Fermilab

The E581/704 collaboration Akchurin, N. ; Langland, J. ; Onel, Y. ; et al.
Phys.Rev.D 48 (1993) 3026-3036, 1993.
Inspire Record 364576 DOI 10.17182/hepdata.22670

The analyzing power AN of proton-proton elastic scattering in the Coulomb-nuclear interference region has been measured using the 200-GeV/c Fermilab polarized proton beam. A theoretically predicted interference between the hadronic non-spin-flip amplitude and the electromagnetic spin-flip amplitude is shown for the first time to be present at high energies in the region of 1.5 × 10−3 to 5.0 × 10−2 (GeV/c)2 four-momentum transfer squared, and our results are analyzed in connection with theoretical calculations. In addition, the role of possible contributions of the hadronic spin-flip amplitude is discussed.

1 data table
Table 1

No description provided.


Polarization of Sigma+ and anti-Sigma- hyperons produced by 800-GeV/c protons

The E761 collaboration Morelos Pineda, Antonio ; Albuquerque, I.F. ; Bondar, N.F. ; et al.
Phys.Rev.Lett. 71 (1993) 2172-2175, 1993.
Inspire Record 356301 DOI 10.17182/hepdata.19722

We have mesured the polarization of 375-GeV/c Σ+ and Σ¯ − hyperons produced by 800-GeV/c protons incident on a Cu target. We find that the Σ+ polarization rises with increasing pt to a maximum of 16% at pt=1.0 GeV/c and then decreases to 10% at pt=1.8 GeV/c. We compare this Σ+ polarization with data at lower energies. The Σ¯ − polarization has been measured for the first time. It has the same sign as the Σ+ but smaller magnitude in a similar kinematical region.

4 data tables
Table 1

Data from Horizontal targeting.

Table 2

Data from Vertical targeting.

Table 3

Data from Horizontal targeting.

More…

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.


First measurement of the depolarization parameter D(onon) of the anti-p p ---> anti-n n charge exchange reaction

Birsa, R. ; Bradamante, F. ; Bressan, A. ; et al.
Phys.Lett.B 302 (1993) 517-522, 1993.
Inspire Record 354498 DOI 10.17182/hepdata.28944

The depolarization parameter D 0 n 0 n in the charge-exchange reaction p p ↑→ n n ↑ has been measured for the first time at the CERN Low Energy Antiproton Ring (LEAR) at 875 MeV/ c antiproton beam momentum, in the forward hemisphere. The measured values of D 0 n 0 n are always smaller than ±0.3, indicating that the two-spin amplitudes dominate the scattering matrix as suggested by the meson exchange potential models.

1 data table
Table 1

No description provided.


Measurement of the analyzing power of the charge exchange anti-p p ---> anti-n n reaction in the momentum range 546-MeV/c - 1287-MeV/c at LEAR

Birsa, R. ; Bradamante, F. ; Bressan, A. ; et al.
Nucl.Phys.B 403 (1993) 25-64, 1993.
Inspire Record 354500 DOI 10.17182/hepdata.37129

Final results of the measurement of the analysing power A On of the p p → n n reaction are presented. Eight measurements in the range 546–1287 MeV/ c incoming p momentum have been performed over the full angular range using a solid polarized proton target and the Low Energy Antiproton Ring (LEAR) at CERN antiproton extracted beams.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

Spin rotation parameters A and R for pi+ p and pi- p elastic scattering from 427-MeV/c to 657-MeV/c

Supek, I. ; Barlow, D.B. ; Briscoe, W.J. ; et al.
Phys.Rev.D 47 (1993) 1762-1775, 1993.
Inspire Record 362062 DOI 10.17182/hepdata.22623

The spin-rotation parameters A and R and the related spin-rotation angle β have been measured for π+p and π−p elastic scattering using protons polarized in the scattering plane. The pion-beam momenta are 427, 471, 547, 625, and 657 MeV/c and the angular range is −0.9≤cosΘc.m.≤0.3. The scattered pion and recoil proton were detected in coincidence, using a scintillator hodoscope for the pions, and the Large Acceptance Spectrometer combined with the JANUS polarimeter for the recoil protons. The results are compared with the four recent πN partial wave analyses (PWA's). Our data show that the major features of these PWA's are correct. The A and R measurements complete our program of pion-nucleon experiments, providing full data sets at three of the above beam momenta. Such sets can be used to test the constraints in the PWA's or to obtain a model-independent set of πN scattering amplitudes.

10 data tables
Table 1

BETA is the spin-rotation angle.

Table 2

BETA is the spin-rotation angle.

Table 3

BETA is the spin-rotation angle.

More…