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  • Chirapatpimol, K (author)

Precision Measurement of the p(e,e′p)π0 Reaction at Threshold

  • Article/chapterEnglish2015

Publisher, publication year, extent ...

  • 2015

Numbers

  • LIBRIS-ID:oai:lup.lub.lu.se:446596db-5f8f-463e-9d52-457f48f04f9e
  • https://lup.lub.lu.se/record/5436259URI
  • https://doi.org/10.1103/PhysRevLett.114.192503DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • New results are reported from a measurement of π^{0} electroproduction near threshold using the p(e,e^{'}p)π^{0} reaction. The experiment was designed to determine precisely the energy dependence of s- and p-wave electromagnetic multipoles as a stringent test of the predictions of chiral perturbation theory (ChPT). The data were taken with an electron beam energy of 1192 MeV using a two-spectrometer setup in Hall A at Jefferson Lab. For the first time, complete coverage of the ϕ_{π}^{*} and θ_{π}^{*} angles in the pπ^{0} center of mass was obtained for invariant energies above threshold from 0.5 up to 15 MeV. The 4-momentum transfer Q^{2} coverage ranges from 0.05 to 0.155 (GeV/c)^{2} in fine steps. A simple phenomenological analysis of our data shows strong disagreement with p-wave predictions from ChPT for Q^{2}>0.07 (GeV/c)^{2}, while the s-wave predictions are in reasonable agreement.

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  • Shabestari, M H (author)
  • Lindgren, R A (author)
  • Smith, L C (author)
  • Annand, J R M (author)
  • Higinbotham, D W (author)
  • Moffit, B (author)
  • Nelyubin, V (author)
  • Norum, B E (author)
  • Allada, K (author)
  • Aniol, K (author)
  • Ardashev, K (author)
  • Armstrong, D S (author)
  • Arndt, R A (author)
  • Benmokhtar, F (author)
  • Bernstein, A M (author)
  • Bertozzi, W (author)
  • Briscoe, W J (author)
  • Bimbot, L (author)
  • Camsonne, A (author)
  • Chen, J-P (author)
  • Choi, S (author)
  • Chudakov, E (author)
  • Cisbani, E (author)
  • Cusanno, F (author)
  • Dalton, M M (author)
  • Dutta, C (author)
  • Egiyan, K (author)
  • Fernàndez-Ramìrez, C (author)
  • Feuerbach, R (author)
  • Fissum, KevinLund University,Lunds universitet,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)nucl-kfi (author)
  • Frullani, S (author)
  • Garibaldi, F (author)
  • Gayou, O (author)
  • Gilman, R (author)
  • Gilad, S (author)
  • Goity, J (author)
  • Gomez, J (author)
  • Hahn, B (author)
  • Hamilton, D (author)
  • Hansen, J-O (author)
  • Huang, J (author)
  • Igarashi, R (author)
  • Ireland, D (author)
  • de Jager, C W (author)
  • Jin, X (author)
  • Jiang, X (author)
  • Jinasundera, T (author)
  • Kellie, J (author)
  • Keppel, C E (author)
  • Kolb, N (author)
  • LeRose, J (author)
  • Liyanage, N (author)
  • Livingston, K (author)
  • McNulty, D (author)
  • Mercado, L (author)
  • Michaels, R (author)
  • Mihovilovič, M (author)
  • Qian, S (author)
  • Qian, X (author)
  • Mailyan, S (author)
  • Mamyan, V (author)
  • Marrone, S (author)
  • Monaghan, P (author)
  • Nanda, S (author)
  • Perdrisat, C F (author)
  • Piasetzky, E (author)
  • Protopopescu, D (author)
  • Punjabi, V (author)
  • Qiang, Y (author)
  • Rachek, I A (author)
  • Rakhman, A (author)
  • Riordan, S (author)
  • Ron, G (author)
  • Rosner, G (author)
  • Saha, A (author)
  • Sawatzky, B (author)
  • Shahinyan, A (author)
  • Širca, S (author)
  • Sparveris, N (author)
  • Subedi, R R (author)
  • Suleiman, R (author)
  • Strakovsky, I (author)
  • Sulkosky, V (author)
  • Moinelo, J (author)
  • Voskanyan, H (author)
  • Wang, K (author)
  • Wang, Y (author)
  • Watson, J (author)
  • Watts, D (author)
  • Wojtsekhowski, B (author)
  • Workman, R L (author)
  • Yao, H (author)
  • Zhan, X (author)
  • Zhang, Y (author)
  • KärnfysikFysiska institutionen (creator_code:org_t)

Related titles

  • In:Physical Review Letters114:191079-7114

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