Precision measurement of the p (e,e'p)π0 reaction at threshold

K. Chirapatpimol; M. H. Shabestari; R. A. Lindgren; L. C. Smith; J. R.M. Annand; D. W. Higinbotham; B. Moffit; V. Nelyubin; B. E. Norum; K. Allada; K. Aniol; K. Ardashev; D. S. Armstrong; R. A. Arndt; F. Benmokhtar; A. M. Bernstein; W. Bertozzi; W. J. Briscoe; L. Bimbot; A. Camsonne; J. P. Chen; S. Choi; E. Chudakov; E. Cisbani; F. Cusanno; M. M. Dalton; C. Dutta; K. Egiyan; C. Fernàndez-Ramìrez; R. Feuerbach; K. G. Fissum; S. Frullani; F. Garibaldi; O. Gayou; R. Gilman; S. Gilad; J. Goity; J. Gomez; B. Hahn; D. Hamilton; J. O. Hansen; J. Huang; R. Igarashi; D. Ireland; C. W. De Jager; X. Jin; X. Jiang; T. Jinasundera; J. Kellie; C. E. Keppel; N. Kolb; J. Lerose; N. Liyanage; K. Livingston; D. McNulty; L. Mercado; R. Michaels; M. Mihovilovič; S. Qian; X. Qian; S. Mailyan; V. Mamyan; S. Marrone; P. Monaghan; S. Nanda; C. F. Perdrisat; E. Piasetzky; D. Protopopescu; V. Punjabi; Y. Qiang; I. A. Rachek; A. Rakhman; S. Riordan; G. Ron; G. Rosner; A. Saha; B. Sawatzky; A. Shahinyan; S. Širca; N. Sparveris; R. R. Subedi; R. Suleiman; I. Strakovsky; V. Sulkosky; J. Moinelo; H. Voskanyan; K. Wang; Y. Wang; J. Watson; D. Watts; B. Wojtsekhowski; R. L. Workman; H. Yao; X. Zhan; Y. Zhang

doi:10.1103/PhysRevLett.114.192503

Precision measurement of the p (e,e'p)π0 reaction at threshold

K. Chirapatpimol, M. H. Shabestari, R. A. Lindgren, L. C. Smith, J. R.M. Annand, D. W. Higinbotham, B. Moffit, V. Nelyubin, B. E. Norum, K. Allada, K. Aniol, K. Ardashev, D. S. Armstrong, R. A. Arndt, F. Benmokhtar, A. M. Bernstein, W. Bertozzi, W. J. Briscoe, L. Bimbot, A. CamsonneJ. P. Chen, S. Choi, E. Chudakov, E. Cisbani, F. Cusanno, M. M. Dalton, C. Dutta, K. Egiyan, C. Fernàndez-Ramìrez, R. Feuerbach, K. G. Fissum, S. Frullani, F. Garibaldi, O. Gayou, R. Gilman, S. Gilad, J. Goity, J. Gomez, B. Hahn, D. Hamilton, J. O. Hansen, J. Huang, R. Igarashi, D. Ireland, C. W. De Jager, X. Jin, X. Jiang, T. Jinasundera, J. Kellie, C. E. Keppel, N. Kolb, J. Lerose, N. Liyanage, K. Livingston, D. McNulty, L. Mercado, R. Michaels, M. Mihovilovič, S. Qian, X. Qian, S. Mailyan, V. Mamyan, S. Marrone, P. Monaghan, S. Nanda, C. F. Perdrisat, E. Piasetzky, D. Protopopescu, V. Punjabi, Y. Qiang, I. A. Rachek, A. Rakhman, S. Riordan, G. Ron, G. Rosner, A. Saha, B. Sawatzky, A. Shahinyan, S. Širca, N. Sparveris, R. R. Subedi, R. Suleiman, I. Strakovsky, V. Sulkosky, J. Moinelo, H. Voskanyan, K. Wang, Y. Wang, J. Watson, D. Watts, B. Wojtsekhowski, R. L. Workman, H. Yao, X. Zhan, Y. Zhang

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Abstract

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.

Original language	English
Article number	192503
Journal	Physical Review Letters
Volume	114
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevLett.114.192503
State	Published - May 13 2015
Externally published	Yes

Funding

Funders	Funder number
U.S. Department of Energy	DE-FG02-97ER41025
National Science Foundation	1307340, 1405857, 1068667, 1306126
Science and Technology Facilities Council	ST/J000175/1, ST/L005719/1

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10.1103/PhysRevLett.114.192503

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Chirapatpimol, K., Shabestari, M. H., Lindgren, R. A., Smith, L. C., Annand, J. R. M., Higinbotham, D. W., Moffit, B., Nelyubin, V., Norum, B. E., Allada, K., Aniol, K., Ardashev, K., Armstrong, D. S., Arndt, R. A., Benmokhtar, F., Bernstein, A. M., Bertozzi, W., Briscoe, W. J., Bimbot, L., ... Zhang, Y. (2015). Precision measurement of the p (e,e'p)π0 reaction at threshold. Physical Review Letters, 114(19), Article 192503. https://doi.org/10.1103/PhysRevLett.114.192503

@article{d46eeac2fcca49839b27400deda68b07,

title = "Precision measurement of the p (e,e'p)π0 reaction at threshold",

abstract = "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.",

author = "K. Chirapatpimol and Shabestari, {M. H.} and Lindgren, {R. A.} and Smith, {L. C.} and Annand, {J. R.M.} and Higinbotham, {D. W.} and B. Moffit and V. Nelyubin and Norum, {B. E.} and K. Allada and K. Aniol and K. Ardashev and Armstrong, {D. S.} and Arndt, {R. A.} and F. Benmokhtar and Bernstein, {A. M.} and W. Bertozzi and Briscoe, {W. J.} and L. Bimbot and A. Camsonne and Chen, {J. P.} and S. Choi and E. Chudakov and E. Cisbani and F. Cusanno and Dalton, {M. M.} and C. Dutta and K. Egiyan and C. Fern{\`a}ndez-Ram{\`i}rez and R. Feuerbach and Fissum, {K. G.} and S. Frullani and F. Garibaldi and O. Gayou and R. Gilman and S. Gilad and J. Goity and J. Gomez and B. Hahn and D. Hamilton and Hansen, {J. O.} and J. Huang and R. Igarashi and D. Ireland and {De Jager}, {C. W.} and X. Jin and X. Jiang and T. Jinasundera and J. Kellie and Keppel, {C. E.} and N. Kolb and J. Lerose and N. Liyanage and K. Livingston and D. McNulty and L. Mercado and R. Michaels and M. Mihovilovi{\v c} and S. Qian and X. Qian and S. Mailyan and V. Mamyan and S. Marrone and P. Monaghan and S. Nanda and Perdrisat, {C. F.} and E. Piasetzky and D. Protopopescu and V. Punjabi and Y. Qiang and Rachek, {I. A.} and A. Rakhman and S. Riordan and G. Ron and G. Rosner and A. Saha and B. Sawatzky and A. Shahinyan and S. {\v S}irca and N. Sparveris and Subedi, {R. R.} and R. Suleiman and I. Strakovsky and V. Sulkosky and J. Moinelo and H. Voskanyan and K. Wang and Y. Wang and J. Watson and D. Watts and B. Wojtsekhowski and Workman, {R. L.} and H. Yao and X. Zhan and Y. Zhang",

note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society.",

year = "2015",

month = may,

day = "13",

doi = "10.1103/PhysRevLett.114.192503",

language = "English",

volume = "114",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "19",

}

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 2015, 'Precision measurement of the p (e,e'p)π0 reaction at threshold', Physical Review Letters, vol. 114, no. 19, 192503. https://doi.org/10.1103/PhysRevLett.114.192503

TY - JOUR

T1 - Precision measurement of the p (e,e'p)π0 reaction at threshold

AU - Chirapatpimol, K.

AU - Shabestari, M. H.

AU - Lindgren, R. A.

AU - Smith, L. C.

AU - Annand, J. R.M.

AU - Higinbotham, D. W.

AU - Moffit, B.

AU - Nelyubin, V.

AU - Norum, B. E.

AU - Allada, K.

AU - Aniol, K.

AU - Ardashev, K.

AU - Armstrong, D. S.

AU - Arndt, R. A.

AU - Benmokhtar, F.

AU - Bernstein, A. M.

AU - Bertozzi, W.

AU - Briscoe, W. J.

AU - Bimbot, L.

AU - Camsonne, A.

AU - Chen, J. P.

AU - Choi, S.

AU - Chudakov, E.

AU - Cisbani, E.

AU - Cusanno, F.

AU - Dalton, M. M.

AU - Dutta, C.

AU - Egiyan, K.

AU - Fernàndez-Ramìrez, C.

AU - Feuerbach, R.

AU - Fissum, K. G.

AU - Frullani, S.

AU - Garibaldi, F.

AU - Gayou, O.

AU - Gilman, R.

AU - Gilad, S.

AU - Goity, J.

AU - Gomez, J.

AU - Hahn, B.

AU - Hamilton, D.

AU - Hansen, J. O.

AU - Huang, J.

AU - Igarashi, R.

AU - Ireland, D.

AU - De Jager, C. W.

AU - Jin, X.

AU - Jiang, X.

AU - Jinasundera, T.

AU - Kellie, J.

AU - Keppel, C. E.

AU - Kolb, N.

AU - Lerose, J.

AU - Liyanage, N.

AU - Livingston, K.

AU - McNulty, D.

AU - Mercado, L.

AU - Michaels, R.

AU - Mihovilovič, M.

AU - Qian, S.

AU - Qian, X.

AU - Mailyan, S.

AU - Mamyan, V.

AU - Marrone, S.

AU - Monaghan, P.

AU - Nanda, S.

AU - Perdrisat, C. F.

AU - Piasetzky, E.

AU - Protopopescu, D.

AU - Punjabi, V.

AU - Qiang, Y.

AU - Rachek, I. A.

AU - Rakhman, A.

AU - Riordan, S.

AU - Ron, G.

AU - Rosner, G.

AU - Saha, A.

AU - Sawatzky, B.

AU - Shahinyan, A.

AU - Širca, S.

AU - Sparveris, N.

AU - Subedi, R. R.

AU - Suleiman, R.

AU - Strakovsky, I.

AU - Sulkosky, V.

AU - Moinelo, J.

AU - Voskanyan, H.

AU - Wang, K.

AU - Wang, Y.

AU - Watson, J.

AU - Watts, D.

AU - Wojtsekhowski, B.

AU - Workman, R. L.

AU - Yao, H.

AU - Zhan, X.

AU - Zhang, Y.

PY - 2015/5/13

Y1 - 2015/5/13

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84930225261&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.114.192503

DO - 10.1103/PhysRevLett.114.192503

M3 - Article

AN - SCOPUS:84930225261

SN - 0031-9007

VL - 114

JO - Physical Review Letters

JF - Physical Review Letters

IS - 19

M1 - 192503

ER -

Precision measurement of the p (e,e'p)π0 reaction at threshold

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