Academic Journal
Precision measurement of the p (e,e'p)π0 reaction at threshold
| العنوان: | Precision measurement of the p (e,e'p)π0 reaction at threshold |
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| المؤلفون: | Chirapatpimol, K, Shabestari, MH, Lindgren, RA, Smith, LC, Annand, JRM, Higinbotham, DW, Moffit, B, Nelyubin, V, Norum, BE, Allada, K, Aniol, K, Ardashev, K, Armstrong, DS, Arndt, RA, Benmokhtar, F, Bernstein, AM, Bertozzi, W, Briscoe, WJ, Bimbot, L, Camsonne, A, Chen, JP, Choi, S, Chudakov, E, Cisbani, E, Cusanno, F, Dalton, MM, Dutta, C, Egiyan, K, Fernàndez-Ramìrez, C, Feuerbach, R, Fissum, KG, Frullani, S, Garibaldi, F, Gayou, O, Gilman, R, Gilad, S, Goity, J, Gomez, J, Hahn, B, Hamilton, D, Hansen, JO, Huang, J, Igarashi, R, Ireland, D, de Jager, CW, Jin, X, Jiang, X, Jinasundera, T, Kellie, J, Keppel, CE, Kolb, N, Lerose, J, Liyanage, N, Livingston, K, McNulty, D, Mercado, L, Michaels, R, Mihovilovič, M, Qian, S, Qian, X, Mailyan, S, Mamyan, V, Marrone, S, Monaghan, P, Nanda, S, Perdrisat, CF, Piasetzky, E, Protopopescu, D, Punjabi, V, Qiang, Y, Rachek, IA, Rakhman, A, Riordan, S, Ron, G, Rosner, G, Saha, A, Sawatzky, B, Shahinyan, A, Širca, S, Sparveris, N, Subedi, RR, Suleiman, R, Strakovsky, I, Sulkosky, V, Moinelo, J, Voskanyan, H, Wang, K, Wang, Y, Watson, J, Watts, D, Wojtsekhowski, B, Workman, RL, Yao, H, Zhan, X, Zhang, Y |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Hall A Collaboration |
| الوصف: | © 2015 American Physical Society. New results are reported from a measurement of π0 electroproduction near threshold using the p(e,e'p)π0 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 φπ∗ and θπ∗ angles in the pπ0 center of mass was obtained for invariant energies above threshold from 0.5 up to 15 MeV. The 4-momentum transfer Q2 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 Q2>0.07(GeV/c)2, while the s-wave predictions are in reasonable agreement. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | 192503- |
| اللغة: | English |
| تدمد: | 0031-9007 1079-7114 |
| Relation: | American Physical Society (APS); Physical Review Letters; CI2AH (isidoc); 26024167 (pubmed); http://hdl.handle.net/20.500.12613/5794 |
| الاتاحة: | https://hdl.handle.net/20.500.12613/5794 |
| رقم الانضمام: | edsbas.2DBF6401 |
| قاعدة البيانات: | BASE |
| تدمد: | 00319007 10797114 |
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