Neutral pion electroproduction in the resonance region at high Q2

Villano, A. N.; Stoler, P.; Bosted, P. E.; Connell, S. H.; Dalton, M. M.; Jones, M. K.; Kubarovsky, V.; Adams, G. S.; Ahmidouch, A.; Arrington, J.; Asaturyan, R.; Baker, O. K.; Breuer, H.; Christy, M. E.; Danagoulian, S.; Day, D.; Dunne, J. A.; Dutta, D.; Ent, R.; Fenker, H. C.; Frolov, V. V.; Gan, L.; Gaskell, D.; Hinton, W.; Holt, R. J.; Horn, T.; Huber, G. M.; Joo, K.; Kalantarians, N.; Keppel, C. E.; Li, Y.; Lung, A.; Mack, D.; Malace, S.; Markowitz, P.; Meekins, D. G.; Mkrtchyan, H.; Napolitano, J.; Niculescu, G.; Niculescu, I.; Potterveld, D. H.; Reimer, Paul E.; Reinhold, J.; Roche, J.; Rock, S. E.; Smith, G. R.; Stepanyan, S.; Tadevosyan, V.; Tvaskis, V.; Ungaro, M.; Uzzle, A.; Vidakovic, S.; Wesselmann, F. R.; Wojtsekhowski, B.; Wood, S. A.; Yuan, L.; Zheng, X.; Zhu, H.

doi:10.1103/PhysRevC.80.035203

Title: Neutral pion electroproduction in the resonance region at high $Q^{2}$

Journal Article · Tue Sep 01 00:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.80.035203· OSTI ID:966673

Villano, A. N.; Stoler, P.; Bosted, P. E.; Connell, S. H.; Dalton, M. M.; Jones, M. K.; Kubarovsky, V.; Adams, G. S.; Ahmidouch, A.; Arrington, J.; Asaturyan, R.; Baker, O. K.; Breuer, H.; Christy, M. E.; Danagoulian, S.; Day, D.; Dunne, J. A.; Dutta, D.; Ent, R.; Fenker, H. C. more »

The process ep {yields} ep{pi}{sup 0} has been measured at Q{sup 2} = 6.4 and 7.7 (GeV/c{sup 2}){sup 2} in Jefferson Lab's Hall C. Unpolarized differential cross sections are reported in the virtual photon-proton center-of-mass frame considering the process {gamma}*p {yields} p{pi}{sup 0}. Various details relating to the background subtractions, radiative corrections, and systematic errors are discussed. The usefulness of the data with regard to the measurement of the electromagnetic properties of the well-known {Delta}(1232) resonance is covered in detail. Specifically considered are the electromagnetic and scalar-magnetic ratios R{sub EM} and R{sub SM} along with the magnetic transition form factor G*{sub M}. It is found that the rapid falloff of the {Delta}(1232) contribution continues into this region of momentum transfer and that other resonances may be making important contributions in this region.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC); National Science Foundation (NSF); South African National Research Foundation

DOE Contract Number:: DE-AC02-06CH11357

OSTI ID:: 966673

Report Number(s):: ANL/PHY/JA-64559; PRVCAN; TRN: US0904075

Journal Information:: Physical Review. C, Nuclear Physics, Vol. 80, Issue 3; ISSN 0556-2813

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: ENGLISH

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