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

C. E. Allgower, K. W. Krueger, T. E. Kasprzyk, H. M. Spinka, D. G. Underwood, A. Yokosawa, G. Bunce, H. Huang, Y. Makdisi, T. Roser, M. Syphers, A. A. Derevschikov, Yu A. Matulenko, L. V. Nogach, S. B. Nurushev, A. N. Vasiliev, M. Bai, S. Y. Lee, Y. Goto, N. Hayashi & 20 others T. Ichihara, M. Okamura, N. Saito, H. En'yo, K. Imai, Y. Kondo, Y. Nakada, M. Nakamura, H. Saito, H. Sakai, Tomotsugu Wakasa, K. Yako, V. Baturine, A. Ogawa, V. Ghazikhanian, G. Igo, S. Trentalange, C. Whitten, N. I. Belikov, A. I. Pavlinov

Research output: Contribution to journalArticle

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Abstract

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 CH 2 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 A N for π ± were determined in the x F and P T 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.

Original languageEnglish
Article number092008
Pages (from-to)920081-9200824
Number of pages8280744
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume65
Issue number9 A
Publication statusPublished - May 1 2002
Externally publishedYes

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proton beams
asymmetry
polarimeters
carbon
pions
polarization
hydrogen
spectrometers
polarimetry
synchrotrons
elastic scattering
methylidyne
gradients
energy

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Allgower, C. E., Krueger, K. W., Kasprzyk, T. E., Spinka, H. M., Underwood, D. G., Yokosawa, A., ... Pavlinov, A. I. (2002). Measurement of analyzing powers of π + and π - produced on a hydrogen and a carbon target with a 22-GeV/c incident polarized proton beam Physical Review D - Particles, Fields, Gravitation and Cosmology, 65(9 A), 920081-9200824. [092008].

Measurement of analyzing powers of π + and π - 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.; Spinka, H. M.; Underwood, D. G.; Yokosawa, A.; Bunce, G.; Huang, H.; Makdisi, Y.; Roser, T.; Syphers, M.; Derevschikov, A. A.; Matulenko, Yu A.; Nogach, L. V.; Nurushev, S. B.; Vasiliev, A. N.; Bai, M.; Lee, S. Y.; Goto, Y.; Hayashi, N.; Ichihara, T.; Okamura, M.; Saito, N.; En'yo, H.; Imai, K.; Kondo, Y.; Nakada, Y.; Nakamura, M.; Saito, H.; Sakai, H.; Wakasa, Tomotsugu; Yako, K.; Baturine, V.; Ogawa, A.; Ghazikhanian, V.; Igo, G.; Trentalange, S.; Whitten, C.; Belikov, N. I.; Pavlinov, A. I.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 65, No. 9 A, 092008, 01.05.2002, p. 920081-9200824.

Research output: Contribution to journalArticle

Allgower, CE, Krueger, KW, Kasprzyk, TE, Spinka, HM, Underwood, DG, Yokosawa, A, Bunce, G, Huang, H, Makdisi, Y, Roser, T, Syphers, M, Derevschikov, AA, Matulenko, YA, Nogach, LV, Nurushev, SB, Vasiliev, AN, Bai, M, Lee, SY, Goto, Y, Hayashi, N, Ichihara, T, Okamura, M, Saito, N, En'yo, H, Imai, K, Kondo, Y, Nakada, Y, Nakamura, M, Saito, H, Sakai, H, Wakasa, T, Yako, K, Baturine, V, Ogawa, A, Ghazikhanian, V, Igo, G, Trentalange, S, Whitten, C, Belikov, NI & Pavlinov, AI 2002, ' Measurement of analyzing powers of π + and π - produced on a hydrogen and a carbon target with a 22-GeV/c incident polarized proton beam ', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 65, no. 9 A, 092008, pp. 920081-9200824.
Allgower, C. E. ; Krueger, K. W. ; Kasprzyk, T. E. ; Spinka, H. M. ; Underwood, D. G. ; Yokosawa, A. ; Bunce, G. ; Huang, H. ; Makdisi, Y. ; Roser, T. ; Syphers, M. ; Derevschikov, A. A. ; Matulenko, Yu A. ; Nogach, L. V. ; Nurushev, S. B. ; Vasiliev, A. N. ; Bai, M. ; Lee, S. Y. ; Goto, Y. ; Hayashi, N. ; Ichihara, T. ; Okamura, M. ; Saito, N. ; En'yo, H. ; Imai, K. ; Kondo, Y. ; Nakada, Y. ; Nakamura, M. ; Saito, H. ; Sakai, H. ; Wakasa, Tomotsugu ; Yako, K. ; Baturine, V. ; Ogawa, A. ; Ghazikhanian, V. ; Igo, G. ; Trentalange, S. ; Whitten, C. ; Belikov, N. I. ; Pavlinov, A. I. / Measurement of analyzing powers of π + and π - produced on a hydrogen and a carbon target with a 22-GeV/c incident polarized proton beam In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2002 ; Vol. 65, No. 9 A. pp. 920081-9200824.
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abstract = "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 CH 2 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 A N for π ± were determined in the x F and P T 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.",
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T1 - Measurement of analyzing powers of π + and π - produced on a hydrogen and a carbon target with a 22-GeV/c incident polarized proton beam

AU - Allgower, C. E.

AU - Krueger, K. W.

AU - Kasprzyk, T. E.

AU - Spinka, H. M.

AU - Underwood, D. G.

AU - Yokosawa, A.

AU - Bunce, G.

AU - Huang, H.

AU - Makdisi, Y.

AU - Roser, T.

AU - Syphers, M.

AU - Derevschikov, A. A.

AU - Matulenko, Yu A.

AU - Nogach, L. V.

AU - Nurushev, S. B.

AU - Vasiliev, A. N.

AU - Bai, M.

AU - Lee, S. Y.

AU - Goto, Y.

AU - Hayashi, N.

AU - Ichihara, T.

AU - Okamura, M.

AU - Saito, N.

AU - En'yo, H.

AU - Imai, K.

AU - Kondo, Y.

AU - Nakada, Y.

AU - Nakamura, M.

AU - Saito, H.

AU - Sakai, H.

AU - Wakasa, Tomotsugu

AU - Yako, K.

AU - Baturine, V.

AU - Ogawa, A.

AU - Ghazikhanian, V.

AU - Igo, G.

AU - Trentalange, S.

AU - Whitten, C.

AU - Belikov, N. I.

AU - Pavlinov, A. I.

PY - 2002/5/1

Y1 - 2002/5/1

N2 - 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 CH 2 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 A N for π ± were determined in the x F and P T 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.

AB - 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 CH 2 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 A N for π ± were determined in the x F and P T 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.

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