Charged pion form factor between Q2=0.60 and 2.45 GeV2 . II. Determination of, and results for, the pion form factor

Huber, G. M.; Blok, H. P.; Horn, T.; Beise, E. J.; Gaskell, D.; Mack, D. J.; Tadevosyan, V.; Volmer, J.; Abbott, D.; Aniol, K.; Anklin, H.; Armstrong, C.; Arrington, J.; Assamagan, K.; Avery, S.; Baker, O. K.; Barrett, B.; Bochna, C.; Boeglin, W.; Brash, E. J.; Breuer, H.; Chang, C. C.; Chant, N.; Christy, M. E.; Dunne, J.; Eden, T.; Ent, R.; Fenker, H.; Gibson, E. F.; Gilman, R.; Gustafsson, K.; Hinton, W.; Holt, R. J.; Jackson, H.; Jin, S.; Jones, M. K.; Keppel, C. E.; Kim, P. H.; Kim, W.; King, P. M.; Klein, A.; Koltenuk, D.; Kovaltchouk, V.; Liang, M.; Liu, J.; Lolos, G. J.; Lung, A.; Margaziotis, D. J.; Markowitz, P.; Matsumura, A.; McKee, D.; Meekins, D.; Mitchell, J.; Miyoshi, T.; Mkrtchyan, H.; Mueller, B.; Niculescu, G.; Niculescu, I.; Okayasu, Y.; Pentchev, L.; Perdrisat, C.; Pitz, D.; Potterveld, D.; Punjabi, V.; Qin, L. M.; Reimer, P. E.; Reinhold, J.; Roche, J.; Roos, P. G.; Sarty, A.; Shin, I. K.; Smith, G. R.; Stepanyan, S.; Tang, L. G.; Tvaskis, V.; van der Meer, R. L.  J.; Vansyoc, K.; Westrum, D. Van; Vidakovic, S.; Vulcan, W.; Warren, G.; Wood, S. A.; Xu, C.; Yan, C.; Zhao, W. -X.; Zheng, X.; Zihlmann, B.

doi:10.1103/PhysRevC.78.045203

Charged pion form factor between $Q^{2} = 0.60$ and $2.45 GeV^{2}$ . II. Determination of, and results for, the pion form factor

Journal Article · Wed Oct 01 04:00:00 EDT 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.78.045203· OSTI ID:981316

; Blok, H. P.; Horn, T.; Beise, E. J.; Gaskell, D.; Mack, D. J.; Tadevosyan, V.; Volmer, J.; Abbott, D.; Aniol, K.; Anklin, H.; Armstrong, C.; Arrington, J.; Assamagan, K.; Avery, S.; Baker, O. K.; Barrett, B.; Bochna, C.; Boeglin, W.; Brash, E. J. more »

The charged pion form factor, F{sub {Pi}}(Q{sup 2}), is an important quantity that can be used to advance our knowledge of hadronic structure. However, the extraction of F{sub {Pi}} from data requires a model of the {sup 1}H(e,e'{Pi}+)n reaction and thus is inherently model dependent. Therefore, a detailed description of the extraction of the charged pion form factor from electroproduction data obtained recently at Jefferson Lab is presented, with particular focus given to the dominant uncertainties in this procedure. Results for F{sub {Pi}} are presented for Q{sup 2} = 0.60-2.45 GeV2. Above Q{sup 2}=1.5GeV{sup 2}, the F{sub {Pi}} values are systematically below the monopole parametrization that describes the low Q{sup 2} data used to determine the pion charge radius. The pion form factor can be calculated in a wide variety of theoretical approaches, and the experimental results are compared to a number of calculations. This comparison is helpful in understanding the role of soft versus hard contributions to hadronic structure in the intermediate Q{sup 2} regime.

Research Organization:: Argonne National Laboratory (ANL)

Sponsoring Organization:: SC; NSF; NSERC; FOM; NATO; KOSEF

DOE Contract Number:: AC02-06CH11357

OSTI ID:: 981316

Report Number(s):: ANL/PHY/JA-61745

Journal Information:: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 78; ISSN 0556-2813; ISSN PRVCAN

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: ENGLISH

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Single π + Electroproduction at w ≈ 2 GeV and the Pion Form Factor Devenish, R. C. E.; Lyth, D. H. Physical Review D, Vol. 6, Issue 7 https://doi.org/10.1103/PhysRevD.6.2067	journal	October 1972
Compilation of coupling constants and low-energy parameters Dumbrajs, O.; Koch, R.; Pilkuhn, H. Nuclear Physics B, Vol. 216, Issue 2 https://doi.org/10.1016/0550-3213(83)90288-2	journal	May 1983

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Charged pion form factor between Q2=0.60 and 2.45 GeV2 . II. Determination of, and results for, the pion form factor

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Charged pion form factor between $Q^{2} = 0.60$ and $2.45 GeV^{2}$ . II. Determination of, and results for, the pion form factor