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The analyzing powers of π+ and π− were measured using an incident 22−GeV/c transversely polarized proton beam at the Brookhaven Alternating Gradient Synchrotron. A magnetic spectrometer measured π± inclusive asymmetries on a hydrogen and a carbon target. An elastic polarimeter with a CH2 target measured pp elastic-scattering asymmetries to determine the beam polarization using published data for the pp elastic analyzing power. Using the beam polarization determined from the elastic polarimeter and asymmetries from the inclusive spectrometer, analyzing powers AN for π± were determined in the xF and pT ranges (0.45–0.8) and (0.3–1.2 GeV/c), respectively. The analyzing power results are similar in both sign and character to other measurements at 200 and 11.7 GeV/c, confirming the expectation that high-energy pion inclusive analyzing powers remain large and relatively energy independent. This suggests that pion inclusive polarimetry may be a suitable method for measuring future beam polarizations at BNL RHIC or DESY HERA. Analyzing powers of π+ and π− produced on hydrogen and carbon targets are the same. Various models to explain inclusive analyzing powers are also discussed.

7 data tables

Table 1

Analyzing power measurements for PI+ and PI- production on the carbon target at incident momentum 21.6 GeV. See text of article for definitions of method 'A' and 'B'.

Table 2

Analyzing power measurements for inclusive PI- production from the hydrogen target.

Table 3

Analyzing power measurements for inclusive PI+ production from the hydrogen target.

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Analyzing Power in Inclusive $\pi^+$ and $\pi^-$ Production at High $\chi_F$ with a 200 GeV Polarized Proton Beam

The FNAL-E704 collaboration Adams, D.L. ; Akchurin, N. ; Belikov, N.I. ; et al.

Phys.Lett.B 264 (1991) 462-466, 1991.

Inspire Record 315569 DOI 10.17182/hepdata.29360

The analyzing power in inclusive charged pion production has been measured using the 200 GeV Fermilab polarized proton beam. A striking dependence in x F is observed in which A N increases from 0 to 0.42 with increasing x F for the π + data and decreases from 0 to −0.38 with increasing x F for π − data. The kinematic range covered is 0.2⩽ x F ⩽0.9 and 0.2⩽ p T ⩽2.0 GeV / c . In a simple model our data indicate that at large x F the transverse spin of the proton is correlated with that of its quark constituents.

7 data tables

Table 1

Integrated over all PT.

Table 2

Integrated over all PT.

Table 3

No description provided.

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Differential Cross-sections for $\pi^\pm$ Production at 0-degrees From Proton Proton and Proton - Deuteron Collisions at 1-{GeV}

Abaev, V.V. ; Gridnev, A.B. ; Koptev, V.P. ; et al.

LENINGRAD-80-569, 1980.

Inspire Record 154994 DOI 10.17182/hepdata.37950

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3 data tables

Table 1

Axis error includes +- 15/15 contribution (DUE TO DATA NORMALISATION ON CROSS SECTION,WHICH IS DEFINED WITH 15% ACCURACY).

Table 2

Axis error includes +- 15/15 contribution (DUE TO DATA NORMALISATION ON CROSS SECTION,WHICH IS DEFINED WITH 15% ACCURACY).

Table 3

Axis error includes +- 15/15 contribution (DUE TO DATA NORMALISATION ON CROSS SECTION,WHICH IS DEFINED WITH 15% ACCURACY).

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DIFFERENTIAL CROSS-SECTIONS FOR pi PRODUCTION AT THETA (pi) = 60-degrees in 1-GeV PROTON INTERACTION WITH NUCLEI

EXPERIMENTAL DATA ON CUMULATIVE PION PRODUCTION AT 8.9-GeV/c PROTON INTERACTION WITH LIGHT NUCLEI

Measurement of analyzing powers of pi + and pi - produced on a hydrogen and a carbon target with a 22-GeV/c incident polarized proton beam

Analyzing Power in Inclusive $\pi^+$ and $\pi^-$ Production at High $\chi_F$ with a 200 GeV Polarized Proton Beam

Differential Cross-sections for $\pi^\pm$ Production at 0-degrees From Proton Proton and Proton - Deuteron Collisions at 1-{GeV}