Induced proton polarization for π0 electroproduction Q2 = 0.126 GeV2/c2 around the Δ (1232) resonance

G. A. Warren, Ricardo Alarcon, C. Armstrong, B. Asavapibhop, D. H. Barkhuff, W. Bertozzi, V. Burkert, J. Chen, J. P. Chen, J. R. Comfort, D. Dale, G. Dodson, S. Dolfini, K. Dow, M. Epstein, M. Farkhondeh, J. M. Finn, S. Gilad, R. W. Gothe, X. Jiang & 35 others M. Jones, K. Joo, A. Karabarbounis, J. Kelly, S. Kowalski, C. Kunz, D. Liu, R. W. Lourie, R. Madey, D. Margaziotis, P. Markowitz, J. I. McIntyre, C. Mertz, B. D. Milbrath, R. Miskimen, J. Mitchell, S. Mukhopadhyay, C. N. Papanicolas, C. Perdrisat, V. Punjabi, L. Qin, P. Rutt, A. Sarty, J. Shaw, S. B. Soong, D. Tieger, C. Tschalær, W. Turchinetz, P. Ulmer, S. Van Verst, C. Vellidis, L. B. Weinstein, S. Williamson, R. J. Woo, A. Young

Research output: Contribution to journalArticle

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Abstract

We present a measurement of the induced proton polarization Pn in π0 electroproduction on the proton around the Δ resonance. The measurement was made at a central invariant mass and a squared four-momentum transfer of W = 1231 MeV and Q2 = 0.126 GeV2/c2, respectively. We measured a large induced polarization, Pn = -0.397±0.055±0.009. The data suggest that the scalar background is larger than expected from a recent effective Hamiltonian model.

Original languageEnglish (US)
Pages (from-to)3722-3725
Number of pages4
JournalPhysical Review C - Nuclear Physics
Volume58
Issue number6
StatePublished - Dec 1998

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protons
polarization
momentum transfer
scalars

ASJC Scopus subject areas

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

Cite this

Warren, G. A., Alarcon, R., Armstrong, C., Asavapibhop, B., Barkhuff, D. H., Bertozzi, W., ... Young, A. (1998). Induced proton polarization for π0 electroproduction Q2 = 0.126 GeV2/c2 around the Δ (1232) resonance. Physical Review C - Nuclear Physics, 58(6), 3722-3725.

Induced proton polarization for π0 electroproduction Q2 = 0.126 GeV2/c2 around the Δ (1232) resonance. / Warren, G. A.; Alarcon, Ricardo; Armstrong, C.; Asavapibhop, B.; Barkhuff, D. H.; Bertozzi, W.; Burkert, V.; Chen, J.; Chen, J. P.; Comfort, J. R.; Dale, D.; Dodson, G.; Dolfini, S.; Dow, K.; Epstein, M.; Farkhondeh, M.; Finn, J. M.; Gilad, S.; Gothe, R. W.; Jiang, X.; Jones, M.; Joo, K.; Karabarbounis, A.; Kelly, J.; Kowalski, S.; Kunz, C.; Liu, D.; Lourie, R. W.; Madey, R.; Margaziotis, D.; Markowitz, P.; McIntyre, J. I.; Mertz, C.; Milbrath, B. D.; Miskimen, R.; Mitchell, J.; Mukhopadhyay, S.; Papanicolas, C. N.; Perdrisat, C.; Punjabi, V.; Qin, L.; Rutt, P.; Sarty, A.; Shaw, J.; Soong, S. B.; Tieger, D.; Tschalær, C.; Turchinetz, W.; Ulmer, P.; Van Verst, S.; Vellidis, C.; Weinstein, L. B.; Williamson, S.; Woo, R. J.; Young, A.

In: Physical Review C - Nuclear Physics, Vol. 58, No. 6, 12.1998, p. 3722-3725.

Research output: Contribution to journalArticle

Warren, GA, Alarcon, R, Armstrong, C, Asavapibhop, B, Barkhuff, DH, Bertozzi, W, Burkert, V, Chen, J, Chen, JP, Comfort, JR, Dale, D, Dodson, G, Dolfini, S, Dow, K, Epstein, M, Farkhondeh, M, Finn, JM, Gilad, S, Gothe, RW, Jiang, X, Jones, M, Joo, K, Karabarbounis, A, Kelly, J, Kowalski, S, Kunz, C, Liu, D, Lourie, RW, Madey, R, Margaziotis, D, Markowitz, P, McIntyre, JI, Mertz, C, Milbrath, BD, Miskimen, R, Mitchell, J, Mukhopadhyay, S, Papanicolas, CN, Perdrisat, C, Punjabi, V, Qin, L, Rutt, P, Sarty, A, Shaw, J, Soong, SB, Tieger, D, Tschalær, C, Turchinetz, W, Ulmer, P, Van Verst, S, Vellidis, C, Weinstein, LB, Williamson, S, Woo, RJ & Young, A 1998, 'Induced proton polarization for π0 electroproduction Q2 = 0.126 GeV2/c2 around the Δ (1232) resonance', Physical Review C - Nuclear Physics, vol. 58, no. 6, pp. 3722-3725.
Warren, G. A. ; Alarcon, Ricardo ; Armstrong, C. ; Asavapibhop, B. ; Barkhuff, D. H. ; Bertozzi, W. ; Burkert, V. ; Chen, J. ; Chen, J. P. ; Comfort, J. R. ; Dale, D. ; Dodson, G. ; Dolfini, S. ; Dow, K. ; Epstein, M. ; Farkhondeh, M. ; Finn, J. M. ; Gilad, S. ; Gothe, R. W. ; Jiang, X. ; Jones, M. ; Joo, K. ; Karabarbounis, A. ; Kelly, J. ; Kowalski, S. ; Kunz, C. ; Liu, D. ; Lourie, R. W. ; Madey, R. ; Margaziotis, D. ; Markowitz, P. ; McIntyre, J. I. ; Mertz, C. ; Milbrath, B. D. ; Miskimen, R. ; Mitchell, J. ; Mukhopadhyay, S. ; Papanicolas, C. N. ; Perdrisat, C. ; Punjabi, V. ; Qin, L. ; Rutt, P. ; Sarty, A. ; Shaw, J. ; Soong, S. B. ; Tieger, D. ; Tschalær, C. ; Turchinetz, W. ; Ulmer, P. ; Van Verst, S. ; Vellidis, C. ; Weinstein, L. B. ; Williamson, S. ; Woo, R. J. ; Young, A. / Induced proton polarization for π0 electroproduction Q2 = 0.126 GeV2/c2 around the Δ (1232) resonance. In: Physical Review C - Nuclear Physics. 1998 ; Vol. 58, No. 6. pp. 3722-3725.
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abstract = "We present a measurement of the induced proton polarization Pn in π0 electroproduction on the proton around the Δ resonance. The measurement was made at a central invariant mass and a squared four-momentum transfer of W = 1231 MeV and Q2 = 0.126 GeV2/c2, respectively. We measured a large induced polarization, Pn = -0.397±0.055±0.009. The data suggest that the scalar background is larger than expected from a recent effective Hamiltonian model.",
author = "Warren, {G. A.} and Ricardo Alarcon and C. Armstrong and B. Asavapibhop and Barkhuff, {D. H.} and W. Bertozzi and V. Burkert and J. Chen and Chen, {J. P.} and Comfort, {J. R.} and D. Dale and G. Dodson and S. Dolfini and K. Dow and M. Epstein and M. Farkhondeh and Finn, {J. M.} and S. Gilad and Gothe, {R. W.} and X. Jiang and M. Jones and K. Joo and A. Karabarbounis and J. Kelly and S. Kowalski and C. Kunz and D. Liu and Lourie, {R. W.} and R. Madey and D. Margaziotis and P. Markowitz and McIntyre, {J. I.} and C. Mertz and Milbrath, {B. D.} and R. Miskimen and J. Mitchell and S. Mukhopadhyay and Papanicolas, {C. N.} and C. Perdrisat and V. Punjabi and L. Qin and P. Rutt and A. Sarty and J. Shaw and Soong, {S. B.} and D. Tieger and C. Tschal{\ae}r and W. Turchinetz and P. Ulmer and {Van Verst}, S. and C. Vellidis and Weinstein, {L. B.} and S. Williamson and Woo, {R. J.} and A. Young",
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T1 - Induced proton polarization for π0 electroproduction Q2 = 0.126 GeV2/c2 around the Δ (1232) resonance

AU - Warren, G. A.

AU - Alarcon, Ricardo

AU - Armstrong, C.

AU - Asavapibhop, B.

AU - Barkhuff, D. H.

AU - Bertozzi, W.

AU - Burkert, V.

AU - Chen, J.

AU - Chen, J. P.

AU - Comfort, J. R.

AU - Dale, D.

AU - Dodson, G.

AU - Dolfini, S.

AU - Dow, K.

AU - Epstein, M.

AU - Farkhondeh, M.

AU - Finn, J. M.

AU - Gilad, S.

AU - Gothe, R. W.

AU - Jiang, X.

AU - Jones, M.

AU - Joo, K.

AU - Karabarbounis, A.

AU - Kelly, J.

AU - Kowalski, S.

AU - Kunz, C.

AU - Liu, D.

AU - Lourie, R. W.

AU - Madey, R.

AU - Margaziotis, D.

AU - Markowitz, P.

AU - McIntyre, J. I.

AU - Mertz, C.

AU - Milbrath, B. D.

AU - Miskimen, R.

AU - Mitchell, J.

AU - Mukhopadhyay, S.

AU - Papanicolas, C. N.

AU - Perdrisat, C.

AU - Punjabi, V.

AU - Qin, L.

AU - Rutt, P.

AU - Sarty, A.

AU - Shaw, J.

AU - Soong, S. B.

AU - Tieger, D.

AU - Tschalær, C.

AU - Turchinetz, W.

AU - Ulmer, P.

AU - Van Verst, S.

AU - Vellidis, C.

AU - Weinstein, L. B.

AU - Williamson, S.

AU - Woo, R. J.

AU - Young, A.

PY - 1998/12

Y1 - 1998/12

N2 - We present a measurement of the induced proton polarization Pn in π0 electroproduction on the proton around the Δ resonance. The measurement was made at a central invariant mass and a squared four-momentum transfer of W = 1231 MeV and Q2 = 0.126 GeV2/c2, respectively. We measured a large induced polarization, Pn = -0.397±0.055±0.009. The data suggest that the scalar background is larger than expected from a recent effective Hamiltonian model.

AB - We present a measurement of the induced proton polarization Pn in π0 electroproduction on the proton around the Δ resonance. The measurement was made at a central invariant mass and a squared four-momentum transfer of W = 1231 MeV and Q2 = 0.126 GeV2/c2, respectively. We measured a large induced polarization, Pn = -0.397±0.055±0.009. The data suggest that the scalar background is larger than expected from a recent effective Hamiltonian model.

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M3 - Article

VL - 58

SP - 3722

EP - 3725

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

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