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Hoblit S, Sandorfi AM, Ardashev K, et al. Measurements of H-->D-->(gamma-->,pi) and implications for the convergence of the Gerasimov-Drell-Hern integral. Phys Rev Lett. 2009;102(17):172002doi: 10.1103/PhysRevLett.102.172002.
Hoblit, S., Sandorfi, A. M., Ardashev, K., Bade, C., Bartalini, O., Blecher, M., Caracappa, A., D'Angelo, A., d'Angelo, A., Di Salvo, R., Fantini, A., Gibson, C., Glückler, H., Hicks, K., Honig, A., Kageya, T., Khandaker, M., Kistner, O. C., Kizilgul, S., Kucuker, S., Lehmann, A., Lowry, M., Lucas, M., Mahon, J., Miceli, L., Moricciani, D., Norum, B., Pap, M., Preedom, B., Seyfarth, H., Schaerf, C., Ströher, H., Thorn, C. E., Whisnant, C. S., Wang, K., Wei, X. (2009). Measurements of H-->D-->(gamma-->,pi) and implications for the convergence of the Gerasimov-Drell-Hern integral. Physical review letters, 102(17), 172002. https://doi.org/10.1103/PhysRevLett.102.172002
Hoblit, S, et al. "Measurements of H-->D-->(gamma-->,pi) and implications for the convergence of the Gerasimov-Drell-Hern integral." Physical review letters vol. 102,17 (2009): 172002. doi: https://doi.org/10.1103/PhysRevLett.102.172002
Hoblit S, Sandorfi AM, Ardashev K, Bade C, Bartalini O, Blecher M, Caracappa A, D'Angelo A, d'Angelo A, Di Salvo R, Fantini A, Gibson C, Glückler H, Hicks K, Honig A, Kageya T, Khandaker M, Kistner OC, Kizilgul S, Kucuker S, Lehmann A, Lowry M, Lucas M, Mahon J, Miceli L, Moricciani D, Norum B, Pap M, Preedom B, Seyfarth H, Schaerf C, Ströher H, Thorn CE, Whisnant CS, Wang K, Wei X. Measurements of H-->D-->(gamma-->,pi) and implications for the convergence of the Gerasimov-Drell-Hern integral. Phys Rev Lett. 2009 May 01;102(17):172002. doi: 10.1103/PhysRevLett.102.172002. Epub 2009 Apr 30. PMID: 19518773.
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Phys Rev Lett. 2009 May 01;102(17):172002. doi: 10.1103/PhysRevLett.102.172002. Epub 2009 Apr 30.

Measurements of H-->D-->(gamma-->,pi) and implications for the convergence of the Gerasimov-Drell-Hern integral.

Physical review letters

S Hoblit, A M Sandorfi, K Ardashev, C Bade, O Bartalini, M Blecher, A Caracappa, A D'Angelo, A d'Angelo, R Di Salvo, A Fantini, C Gibson, H Glückler, K Hicks, A Honig, T Kageya, M Khandaker, O C Kistner, S Kizilgul, S Kucuker, A Lehmann, M Lowry, M Lucas, J Mahon, L Miceli, D Moricciani, B Norum, M Pap, B Preedom, H Seyfarth, C Schaerf, H Ströher, C E Thorn, C S Whisnant, K Wang, X Wei,

Affiliations

  1. Department of Physics, University of Virginia, Charlottesville, Virginia 22901, USA. [email protected]

PMID: 19518773 DOI: 10.1103/PhysRevLett.102.172002

Abstract

We report new measurements of inclusive pi production from frozen-spin HD for polarized photon beams covering the Delta(1232) resonance. These provide data simultaneously on both H and D with nearly complete angular distributions of the spin-difference cross sections entering the Gerasimov-Drell-Hearn (GDH) sum rule. Recent results from Mainz and Bonn exceed the GDH prediction for the proton by 22 microb, suggesting as yet unmeasured high-energy components. Our pi0 data reveal a different angular dependence than assumed in Mainz analyses and integrate to a value that is 18 microb lower, suggesting a more rapid convergence. Our results for deuterium are somewhat lower than published data, considerably more precise, and generally lower than available calculations.

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