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

Allgower, C.E. ; Krueger, K.W. ; Kasprzyk, T.E. ; et al.
Phys.Rev.D 65 (2002) 092008, 2002.
Inspire Record 587580 DOI 10.17182/hepdata.22221

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

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'.

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

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

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Analyzing power of collisions between polarized protons with energies in the range 0.71-GeV to 3.61-GeV and carbon nuclei

Anoshina, E.V. ; Bodyagin, V.A. ; Vardanian, I.N. ; et al.
Phys.Atom.Nucl. 60 (1997) 224-229, 1997.
Inspire Record 457394 DOI 10.17182/hepdata.17091

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3 data tables

(C=EXP1) and (C=EXP2) correspond to two different method of event's registration. See text for details.

(C=EXP1) and (C=EXP2) correspond to two different method of event's registration. See text for details. Quasielastic events.

(C=EXP1) and (C=EXP2) correspond to two different method of event's registration. See text for details. Quasielastic events.


Polarization of Cumulative Protons Produced in the Reaction $P$ a $\to P^\prime$ X at 1-{GeV}. (In Russian)

Belostotsky, S.L. ; Dotsenko, Yu.V. ; Ero, J. ; et al.
Sov.J.Nucl.Phys. 42 (1985) 904, 1985.
Inspire Record 210114 DOI 10.17182/hepdata.38015

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10 data tables

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MEASUREMENT OF POLARIZATION OF CUMULATIVE PROTONS. (IN RUSSIAN)

Vorobev, L.S. ; Gavrilov, V.B. ; Goryainov, N.A. ; et al.
Yad.Fiz. 41 (1985) 1541-1545, 1985.
Inspire Record 227491 DOI 10.17182/hepdata.17614

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3 data tables

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POLARIZATIONAL EFFECTS IN P + A ---> P + ... REACTIONS AT THE ENERGIES OF 316-MEV - 1000-MEV. (IN RUSSIAN)

Zulkarneev, R.Ya. ; Kutuev, R.Kh. ;
Yad.Fiz. 39 (1984) 785-793, 1984.
Inspire Record 208212 DOI 10.17182/hepdata.17711

None

7 data tables

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Angular and Momentum Dependence of Polarization of Protons Emitted in the $p c$ Collisions at 640-{MeV}

Zulkarneev, R.Ya. ; Kutuev, R.Kh. ; Murtazaev, Kh. ;
Yad.Fiz. 32 (1980) 889-892, 1980.
Inspire Record 153351 DOI 10.17182/hepdata.39226

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1 data table

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Proton Polarization in Inclusive Processes at {Fermilab} Energies

Polvado, R.O. ; Ems, S.C. ; Gray, S.W. ; et al.
Phys.Rev.Lett. 42 (1979) 1325, 1979.
Inspire Record 140261 DOI 10.17182/hepdata.20796

The results of an experiment conducted at Fermilab to measure the polarization of the final-state proton in the reaction p+p→p↑+X and p+C→p↑+X are presented. Measurements were made at beam energies of 100, 200, 300, and 400 GeV for PT from 0.5 to 1.5 GeV/c and xF between - 0.7 and - 0.9.

4 data tables

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