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; Kevin 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, Kevin 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

Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

Sammanfattning

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.

Originalspråk	engelska
Artikelnummer	192503
Tidskrift	Physical Review Letters
Volym	114
Nummer	19
DOI	https://doi.org/10.1103/PhysRevLett.114.192503
Status	Published - 2015

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10.1103/PhysRevLett.114.192503

Production of Mesons with Electromagnetic Beams
Fissum, K. (Forskare)
1988/06/01 → …
Projekt: Forskning

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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), Artikel 192503. https://doi.org/10.1103/PhysRevLett.114.192503

@article{446596db5f8f463e9d52457f48f04f9e,

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

abstract = "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.",

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 J-P Chen 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 Kevin Fissum 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 J-O Hansen 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",

year = "2015",

doi = "10.1103/PhysRevLett.114.192503",

language = "English",

volume = "114",

journal = "Physical Review Letters",

issn = "1079-7114",

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, J-P, Choi, S, Chudakov, E, Cisbani, E, Cusanno, F, Dalton, MM, Dutta, C, Egiyan, K, Fernàndez-Ramìrez, C, Feuerbach, R, Fissum, K, Frullani, S, Garibaldi, F, Gayou, O, Gilman, R, Gilad, S, Goity, J, Gomez, J, Hahn, B, Hamilton, D, Hansen, J-O, 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, nr. 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, Kevin

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

Y1 - 2015

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevLett.114.192503

DO - 10.1103/PhysRevLett.114.192503

M3 - Article

C2 - 26024167

SN - 1079-7114

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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Production of Mesons with Electromagnetic Beams

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