Experimental study of the P₁₁(1440) and D₁₃(1520) resonances from the CLAS data on ep→e'π⁺π⁻p'

Mokeev, V. I.; Burkert, V. D.; Elouadrhiri, L.; Fedotov, G. V.; Golovatch, E. N.; Gothe, R. W.; Ishkhanov, B. S.; Isupov, E. L.; Adhikari, K. P.; Aghasyan, M.; Anghinolfi, M.; Avakian, H.; Baghdasaryan, H.; Ball, J.; Baltzell, N. A.; Battaglieri, M.; Batourine, V.; Bedlinskiy, I.; Biselli, A. S.; Bookwalter, C.; Boiarinov, S.; Briscoe, W. J.; Brooks, W. K.; Carman, D. S.; Celentano, A.; Charles, G.; Cole, P. L.; Contalbrigo, M.; Crede, V.; D'Angelo, A.; Daniel, A.; Dashyan, N.; De Vita, R.; De Sanctis, E.; Deur, A.; Djalali, C.; Doughty, D.; Dupre, R.; El Alaoui, A.; Eugenio, P.; Fegan, S.; Fradi, A.; Giovanetti, K. L.; Girod, F. X.; Gohn, W.; Graham, L.; Griffioen, K. A.; Guegan, B.; Guidal, M.; Guo, L.; Hafidi, K.; Hakobyan, H.; Hanretty, C.; Hicks, K.; Ho, D.; Holtrop, M.; Ilieva, Y.; Ireland, D. G.; Jo, H. S.; Joo, K.; Keller, D.; Khandaker, M.; Khetarpal, P.; Kim, A.; Kim, W.; Klein, A.; Klein, F. J.; Koirala, S.; Kubarovsky, A.; Kubarovsky, V.; Kuleshov, S. V.; Kvaltine, N. D.; Livingston, K.; Lu, H. Y.; MacGregor, I. J. D.; Mao, Y.; Markov, N.; Martinez, D.; Mayer, M.; McKinnon, B.; Meyer, C. A.; Mineeva, T.; Mirazita, M.; Moutarde, H.; Munevar, E.; Nadel-Turonski, P.; Nepali, C. S.; Ostrovidov, A. I.; Pappalardo, L. L.; Paremuzyan, R.; Park, K.; Park, S.; Pasyuk, E.; Pereira, S. Anefalos; Pisano, S.; Pogorelko, O.; Pozdniakov, S.; Price, J. W.; Procureur, S.; Protopopescu, D.; Raue, B. A.; Ricco, G.; Rimal, D.; Ripani, M.; Rosner, G.; Rossi, P.; Sabatié, F.; Saini, M. S.; Salgado, C.; Schott, D.; Schumacher, R. A.; Seder, E.; Seraydaryan, H.; Sharabian, Y. G.; Smith, G. D.; Smith, L. C.; Sober, D. I.; Sokhan, D.; Stepanyan, S.; Stepanyan, S. S.; Stoler, P.; Strakovsky, I. I.; Strauch, S.; Tang, W.; Taylor, C. E.; Tian, Ye; Tkachenko, S.; Trivedi, A.; Ungaro, M.; Vineyard, M. F.; Voskanyan, H.; Voutier, E.; Walford, N. K.; Wood, M. H.; Zachariou, N.; Zhao, Z. W.; Zonta, I.

doi:10.1103/PhysRevC.86.035203

Title: Experimental study of the P₁₁(1440) and D₁₃(1520) resonances from the CLAS data on ep→e^'π⁺π⁻p^'

Abstract

The transition helicity amplitudes from the proton ground state to the P₁₁(1440) and D₁₃(1520) excited states (γ_vpN* electrocouplings) were determined from the analysis of nine independent one-fold differential π⁺π⁻p electroproduction cross sections off a proton target, taken with CLAS at photon virtualities of 0.25<0.60 GeV². The phenomenological reaction model was employed for separation of the resonant and nonresonant contributions to the final state. The P₁₁(1440) and D₁₃(1520) electrocouplings were obtained from the resonant amplitudes parametrized within the framework of a unitarized Breit-Wigner ansatz. They are consistent with results obtained in the previous CLAS analyses of the π⁺n and π⁰p channels. The successful description of a large body of data in dominant meson-electroproduction channels off protons with the same γ_vpN* electrocouplings offers clear evidence for the reliable extraction of these fundamental quantities from meson-electroproduction data. This analysis also led to the determination of the long-awaited hadronic branching ratios for the D₁₃(1520) decay into Δπ (24%–32%) and Nρ (8%–17%).

Authors:: Mokeev, V. I.; Burkert, V. D.; Elouadrhiri, L.; Fedotov, G. V.; Golovatch, E. N.; Gothe, R. W.; Ishkhanov, B. S.; Isupov, E. L.; Adhikari, K. P.; Aghasyan, M.; Anghinolfi, M.; Avakian, H.; Baghdasaryan, H.; Ball, J.; Baltzell, N. A.; Battaglieri, M.; Batourine, V.; Bedlinskiy, I.; Biselli, A. S.; Bookwalter, C. more »« less

Publication Date:: Thu Sep 13 00:00:00 EDT 2012

Sponsoring Org.:: USDOE

OSTI Identifier:: 1103323

Resource Type:: Publisher's Accepted Manuscript

Journal Name:: Physical Review. C, Nuclear Physics

Additional Journal Information:: Journal Name: Physical Review. C, Nuclear Physics Journal Volume: 86 Journal Issue: 3; Journal ID: ISSN 0556-2813

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Citation Formats


                    Mokeev, V. I., Burkert, V. D., Elouadrhiri, L., Fedotov, G. V., Golovatch, E. N., Gothe, R. W., Ishkhanov, B. S., Isupov, E. L., Adhikari, K. P., Aghasyan, M., Anghinolfi, M., Avakian, H., Baghdasaryan, H., Ball, J., Baltzell, N. A., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Bookwalter, C., Boiarinov, S., Briscoe, W. J., Brooks, W. K., Carman, D. S., Celentano, A., Charles, G., Cole, P. L., Contalbrigo, M., Crede, V., D'Angelo, A., Daniel, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Doughty, D., Dupre, R., El Alaoui, A., Eugenio, P., Fegan, S., Fradi, A., Giovanetti, K. L., Girod, F. X., Gohn, W., Graham, L., Griffioen, K. A., Guegan, B., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Hicks, K., Ho, D., Holtrop, M., Ilieva, Y., Ireland, D. G., Jo, H. S., Joo, K., Keller, D., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, A., Klein, F. J., Koirala, S., Kubarovsky, A., Kubarovsky, V., Kuleshov, S. V., Kvaltine, N. D., Livingston, K., Lu, H. Y., MacGregor, I. J. D., Mao, Y., Markov, N., Martinez, D., Mayer, M., McKinnon, B., Meyer, C. A., Mineeva, T., Mirazita, M., Moutarde, H., Munevar, E., Nadel-Turonski, P., Nepali, C. S., Ostrovidov, A. I., Pappalardo, L. L., Paremuzyan, R., Park, K., Park, S., Pasyuk, E., Pereira, S. Anefalos, Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J. W., Procureur, S., Protopopescu, D., Raue, B. A., Ricco, G., Rimal, D., Ripani, M., Rosner, G., Rossi, P., Sabatié, F., Saini, M. S., Salgado, C., Schott, D., Schumacher, R. A., Seder, E., Seraydaryan, H., Sharabian, Y. G., Smith, G. D., Smith, L. C., Sober, D. I., Sokhan, D., Stepanyan, S., Stepanyan, S. S., Stoler, P., Strakovsky, I. I., Strauch, S., Tang, W., Taylor, C. E., Tian, Ye, Tkachenko, S., Trivedi, A., Ungaro, M., Vineyard, M. F., Voskanyan, H., Voutier, E., Walford, N. K., Wood, M. H., Zachariou, N., Zhao, Z. W., and Zonta, I. Experimental study of the P₁₁(1440) and D₁₃(1520) resonances from the CLAS data on ep→e'π⁺π⁻p'.  United States: N. p., 2012. 
Web.  doi:10.1103/PhysRevC.86.035203.

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                    Mokeev, V. I., Burkert, V. D., Elouadrhiri, L., Fedotov, G. V., Golovatch, E. N., Gothe, R. W., Ishkhanov, B. S., Isupov, E. L., Adhikari, K. P., Aghasyan, M., Anghinolfi, M., Avakian, H., Baghdasaryan, H., Ball, J., Baltzell, N. A., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Bookwalter, C., Boiarinov, S., Briscoe, W. J., Brooks, W. K., Carman, D. S., Celentano, A., Charles, G., Cole, P. L., Contalbrigo, M., Crede, V., D'Angelo, A., Daniel, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Doughty, D., Dupre, R., El Alaoui, A., Eugenio, P., Fegan, S., Fradi, A., Giovanetti, K. L., Girod, F. X., Gohn, W., Graham, L., Griffioen, K. A., Guegan, B., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Hicks, K., Ho, D., Holtrop, M., Ilieva, Y., Ireland, D. G., Jo, H. S., Joo, K., Keller, D., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, A., Klein, F. J., Koirala, S., Kubarovsky, A., Kubarovsky, V., Kuleshov, S. V., Kvaltine, N. D., Livingston, K., Lu, H. Y., MacGregor, I. J. D., Mao, Y., Markov, N., Martinez, D., Mayer, M., McKinnon, B., Meyer, C. A., Mineeva, T., Mirazita, M., Moutarde, H., Munevar, E., Nadel-Turonski, P., Nepali, C. S., Ostrovidov, A. I., Pappalardo, L. L., Paremuzyan, R., Park, K., Park, S., Pasyuk, E., Pereira, S. Anefalos, Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J. W., Procureur, S., Protopopescu, D., Raue, B. A., Ricco, G., Rimal, D., Ripani, M., Rosner, G., Rossi, P., Sabatié, F., Saini, M. S., Salgado, C., Schott, D., Schumacher, R. A., Seder, E., Seraydaryan, H., Sharabian, Y. G., Smith, G. D., Smith, L. C., Sober, D. I., Sokhan, D., Stepanyan, S., Stepanyan, S. S., Stoler, P., Strakovsky, I. I., Strauch, S., Tang, W., Taylor, C. E., Tian, Ye, Tkachenko, S., Trivedi, A., Ungaro, M., Vineyard, M. F., Voskanyan, H., Voutier, E., Walford, N. K., Wood, M. H., Zachariou, N., Zhao, Z. W., & Zonta, I. Experimental study of the P₁₁(1440) and D₁₃(1520) resonances from the CLAS data on ep→e'π⁺π⁻p'.  United States.  https://doi.org/10.1103/PhysRevC.86.035203

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                    Mokeev, V. I., Burkert, V. D., Elouadrhiri, L., Fedotov, G. V., Golovatch, E. N., Gothe, R. W., Ishkhanov, B. S., Isupov, E. L., Adhikari, K. P., Aghasyan, M., Anghinolfi, M., Avakian, H., Baghdasaryan, H., Ball, J., Baltzell, N. A., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Bookwalter, C., Boiarinov, S., Briscoe, W. J., Brooks, W. K., Carman, D. S., Celentano, A., Charles, G., Cole, P. L., Contalbrigo, M., Crede, V., D'Angelo, A., Daniel, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Doughty, D., Dupre, R., El Alaoui, A., Eugenio, P., Fegan, S., Fradi, A., Giovanetti, K. L., Girod, F. X., Gohn, W., Graham, L., Griffioen, K. A., Guegan, B., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Hicks, K., Ho, D., Holtrop, M., Ilieva, Y., Ireland, D. G., Jo, H. S., Joo, K., Keller, D., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, A., Klein, F. J., Koirala, S., Kubarovsky, A., Kubarovsky, V., Kuleshov, S. V., Kvaltine, N. D., Livingston, K., Lu, H. Y., MacGregor, I. J. D., Mao, Y., Markov, N., Martinez, D., Mayer, M., McKinnon, B., Meyer, C. A., Mineeva, T., Mirazita, M., Moutarde, H., Munevar, E., Nadel-Turonski, P., Nepali, C. S., Ostrovidov, A. I., Pappalardo, L. L., Paremuzyan, R., Park, K., Park, S., Pasyuk, E., Pereira, S. Anefalos, Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J. W., Procureur, S., Protopopescu, D., Raue, B. A., Ricco, G., Rimal, D., Ripani, M., Rosner, G., Rossi, P., Sabatié, F., Saini, M. S., Salgado, C., Schott, D., Schumacher, R. A., Seder, E., Seraydaryan, H., Sharabian, Y. G., Smith, G. D., Smith, L. C., Sober, D. I., Sokhan, D., Stepanyan, S., Stepanyan, S. S., Stoler, P., Strakovsky, I. I., Strauch, S., Tang, W., Taylor, C. E., Tian, Ye, Tkachenko, S., Trivedi, A., Ungaro, M., Vineyard, M. F., Voskanyan, H., Voutier, E., Walford, N. K., Wood, M. H., Zachariou, N., Zhao, Z. W., and Zonta, I. Thu .  
"Experimental study of the P₁₁(1440) and D₁₃(1520) resonances from the CLAS data on ep→e'π⁺π⁻p'".  United States.  https://doi.org/10.1103/PhysRevC.86.035203.

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@article{osti_1103323,

  title        = {Experimental study of the P₁₁(1440) and D₁₃(1520) resonances from the CLAS data on ep→e'π⁺π⁻p'},

  author       = {Mokeev, V. I. and Burkert, V. D. and Elouadrhiri, L. and Fedotov, G. V. and Golovatch, E. N. and Gothe, R. W. and Ishkhanov, B. S. and Isupov, E. L. and Adhikari, K. P. and Aghasyan, M. and Anghinolfi, M. and Avakian, H. and Baghdasaryan, H. and Ball, J. and Baltzell, N. A. and Battaglieri, M. and Batourine, V. and Bedlinskiy, I. and Biselli, A. S. and Bookwalter, C. and Boiarinov, S. and Briscoe, W. J. and Brooks, W. K. and Carman, D. S. and Celentano, A. and Charles, G. and Cole, P. L. and Contalbrigo, M. and Crede, V. and D'Angelo, A. and Daniel, A. and Dashyan, N. and De Vita, R. and De Sanctis, E. and Deur, A. and Djalali, C. and Doughty, D. and Dupre, R. and El Alaoui, A. and Eugenio, P. and Fegan, S. and Fradi, A. and Giovanetti, K. L. and Girod, F. X. and Gohn, W. and Graham, L. and Griffioen, K. A. and Guegan, B. and Guidal, M. and Guo, L. and Hafidi, K. and Hakobyan, H. and Hanretty, C. and Hicks, K. and Ho, D. and Holtrop, M. and Ilieva, Y. and Ireland, D. G. and Jo, H. S. and Joo, K. and Keller, D. and Khandaker, M. and Khetarpal, P. and Kim, A. and Kim, W. and Klein, A. and Klein, F. J. and Koirala, S. and Kubarovsky, A. and Kubarovsky, V. and Kuleshov, S. V. and Kvaltine, N. D. and Livingston, K. and Lu, H. Y. and MacGregor, I. J. D. and Mao, Y. and Markov, N. and Martinez, D. and Mayer, M. and McKinnon, B. and Meyer, C. A. and Mineeva, T. and Mirazita, M. and Moutarde, H. and Munevar, E. and Nadel-Turonski, P. and Nepali, C. S. and Ostrovidov, A. I. and Pappalardo, L. L. and Paremuzyan, R. and Park, K. and Park, S. and Pasyuk, E. and Pereira, S. Anefalos and Pisano, S. and Pogorelko, O. and Pozdniakov, S. and Price, J. W. and Procureur, S. and Protopopescu, D. and Raue, B. A. and Ricco, G. and Rimal, D. and Ripani, M. and Rosner, G. and Rossi, P. and Sabatié, F. and Saini, M. S. and Salgado, C. and Schott, D. and Schumacher, R. A. and Seder, E. and Seraydaryan, H. and Sharabian, Y. G. and Smith, G. D. and Smith, L. C. and Sober, D. I. and Sokhan, D. and Stepanyan, S. and Stepanyan, S. S. and Stoler, P. and Strakovsky, I. I. and Strauch, S. and Tang, W. and Taylor, C. E. and Tian, Ye and Tkachenko, S. and Trivedi, A. and Ungaro, M. and Vineyard, M. F. and Voskanyan, H. and Voutier, E. and Walford, N. K. and Wood, M. H. and Zachariou, N. and Zhao, Z. W. and Zonta, I.},

  abstractNote = {The transition helicity amplitudes from the proton ground state to the P₁₁(1440) and D₁₃(1520) excited states (γvpN* electrocouplings) were determined from the analysis of nine independent one-fold differential π⁺π⁻p electroproduction cross sections off a proton target, taken with CLAS at photon virtualities of 0.25<0.60 GeV². The phenomenological reaction model was employed for separation of the resonant and nonresonant contributions to the final state. The P₁₁(1440) and D₁₃(1520) electrocouplings were obtained from the resonant amplitudes parametrized within the framework of a unitarized Breit-Wigner ansatz. They are consistent with results obtained in the previous CLAS analyses of the π⁺n and π⁰p channels. The successful description of a large body of data in dominant meson-electroproduction channels off protons with the same γvpN* electrocouplings offers clear evidence for the reliable extraction of these fundamental quantities from meson-electroproduction data. This analysis also led to the determination of the long-awaited hadronic branching ratios for the D₁₃(1520) decay into Δπ (24%–32%) and Nρ (8%–17%).},

  doi          = {10.1103/PhysRevC.86.035203},

  journal      = {Physical Review. C, Nuclear Physics},

  number       = 3,

  volume       = 86,

  place        = {United States},

  year         = {Thu Sep 13 00:00:00 EDT 2012},

  month        = {Thu Sep 13 00:00:00 EDT 2012}

}

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Torres, A. Martínez; Khemchandani, K. P.; Oset, E.
Physical Review C, Vol. 79, Issue 6
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Model analysis of the $ep \to e^{'} p π^{+} π^{-}$ electroproduction reaction on the proton
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Mokeev, V. I.; Burkert, V. D.; Lee, T. -S. H.
Physical Review C, Vol. 80, Issue 4
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$π^{+}$ photoproduction on the proton for photon energies from 0.725 to 2.875 GeV
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Dugger, M.; Ritchie, B. G.; Ball, J. P.
Physical Review C, Vol. 79, Issue 6
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Electroproduction of the Roper resonance as a hybrid state
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Physical Review D, Vol. 46, Issue 1
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Excited state baryon spectroscopy from lattice QCD
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Edwards, Robert G.; Dudek, Jozef J.; Richards, David G.
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Measurement of the polarized structure function $σ_{L T^{'}}$ for $p (\vec{e}, e^{'} π^{+}) n$ in the $Δ (1232)$ resonance region
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Capstick, Simon; Keister, B. D.
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Lattice results on nucleon/roper properties
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Lin, Huey-Wen
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Aiello, M.; Giannini, M. M.; Santopinto, E.
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Chang, Lei; Liu, Yu-Xin; Roberts, Craig D.
Physical Review Letters, Vol. 106, Issue 7
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Electroexcitation of nucleon resonances
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Aznauryan, I. G.; Burkert, V. D.
Progress in Particle and Nuclear Physics, Vol. 67, Issue 1
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Electroproduction of the $N^{*} (1535)$ Resonance at Large Momentum Transfer
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Braun, V. M.; Göckeler, M.; Horsley, R.
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Capstick, S.; Švarc, A.; Tiator, L.
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Ramalho, G.; Tsushima, K.
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Lattice study of the $N − P_{11}$ transition form factors
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Lin, Huey-Wen; Cohen, Saul D.; Edwards, Robert G.
Physical Review D, Vol. 78, Issue 11
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Meson Production and Baryon Resonances at clas
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Burkert, Volker D.
International Journal of Modern Physics A, Vol. 26, Issue 03n04
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Phenomenological studies of double charged pion electroproduction from the CLAS data
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Mokeev, Victor; Burkert, Volker
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Quasi-two-body decays of nonstrange baryons
journal, May 1994

Capstick, Simon; Roberts, Winston
Physical Review D, Vol. 49, Issue 9
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Electroexcitation of nucleon resonances at $Q^{2} = 0.65 (GeV / c)^{2}$ from a combined analysis of single- and double-pion electroproduction data
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Aznauryan, I. G.; Burkert, V. D.; Fedotov, G. V.
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A light-front description of electromagnetic form factors for hadrons
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Suzuki, N.; Juliá-Díaz, B.; Kamano, H.
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Arndt, Richard A.; Ford, John M.; Roper, L. David
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Dudek, Jozef J.; Edwards, Robert G.
Physical Review D, Vol. 85, Issue 5
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Measurement of $e p \to e^{'} p π^{+} π^{-}$ and Baryon Resonance Analysis
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Ripani, M.; Burkert, V. D.; Mokeev, V.
Physical Review Letters, Vol. 91, Issue 2
DOI: 10.1103/PhysRevLett.91.022002

Connection of Elastic Electromagnetic Nucleon Form Factors at Large $Q^{2}$ and Deep Inelastic Structure Functions Near Threshold
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Drell, Sidney D.; Yan, Tung-Mow
Physical Review Letters, Vol. 24, Issue 4
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Electromagnetic excitations of baryon resonances
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Burkert, Volker D.
Progress in Particle and Nuclear Physics, Vol. 55, Issue 1
DOI: 10.1016/j.ppnp.2005.01.015

Nucleon electromagnetic form factors and electroexcitation of low-lying nucleon resonances in a light-front relativistic quark model
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Aznauryan, I. G.; Burkert, V. D.
Physical Review C, Vol. 85, Issue 5
DOI: 10.1103/PhysRevC.85.055202

First measurement of target and double spin asymmetries for $\vec{e} \vec{p} \to ep π^{0}$ in the nucleon resonance region above the $Δ (1232)$
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Biselli, A. S.; Burkert, V. D.; Amaryan, M. J.
Physical Review C, Vol. 78, Issue 4
DOI: 10.1103/PhysRevC.78.045204

Isobar channels in the production of π+π− pairs on a proton by virtual photons
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Burkert, V. D.; Mokeev, V. I.; Shvedunov, N. V.
Physics of Atomic Nuclei, Vol. 70, Issue 3
DOI: 10.1134/S1063778807030027

Measurement of the polarized structure function $σ_{{LT}^{'}}$ for $p (\vec{e} {, e}^{'} p) π^{0}$ in the $Δ (1232)$ resonance region
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Joo, K.; Smith, L. C.; Burkert, V. D.
Physical Review C, Vol. 68, Issue 3
DOI: 10.1103/PhysRevC.68.032201

Electroexcitation of the $P_{33} (1232)$ , $P_{11} (1440)$ , $D_{13} (1520)$ , and $S_{11} (1535)$ at $Q^{2} = 0.4$ and $0.65 (GeV / c)^{2}$
journal, January 2005

Aznauryan, I. G.; Burkert, V. D.; Egiyan, H.
Physical Review C, Vol. 71, Issue 1
DOI: 10.1103/PhysRevC.71.015201

Baryon form factors of relativistic constituent-quark models
journal, March 2004

Juliá-Díaz, B.; Riska, D. O.; Coester, F.
Physical Review C, Vol. 69, Issue 3
DOI: 10.1103/PhysRevC.69.035212

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Title: Experimental study of the P₁₁(1440) and D₁₃(1520) resonances from the CLAS data on ep→e'π⁺π⁻p'

Abstract

Citation Formats

Quark models of baryon masses and decays journal, January 2000

Extraction and interpretation of γ N → Δ form factors within a dynamical model journal, January 2007

Electroproduction of p π + π − off protons at 0 . 2 < Q 2 < 0 . 6 GeV 2 and 1 . 3 < W < 1 . 57 GeV with the CLAS detector journal, January 2009

Single π + electroproduction on the proton in the first and second resonance regions at 0.25 GeV 2 < Q 2 < 0.65 GeV 2 journal, February 2006

Unitary isobar model --MAID2007 journal, October 2007

Pure S -wave covariant model for the nucleon journal, January 2008

Cross sections and beam asymmetries for e → p → e n π + in the nucleon resonance region for 1 . 7 ⩽ Q 2 ⩽ 4 . 5 GeV 2 journal, January 2008

Investigation of N-N* Electromagnetic Form Factors within a Front-Form CQM book, January 1999

A phenomenological description of photo- and electroproduction in nucleon resonance region journal, June 2000

Double and single pion photoproduction within a dynamical coupled-channels model journal, December 2009

Extraction of P 11 resonances from π N data journal, June 2010

Reaction Models for Meson Production Reactions in the Nucleon Resonance Region journal, June 2009

γ∗ N → Δ at JLab: Exploring the High Q2 Regime conference, January 2007

Extraction of electromagnetic transition form factors for nucleon resonances within a dynamical coupled-channels model journal, October 2010

Baryon resonance analysis from MAID journal, December 2009

The K-matrix formalism for overlapping resonances journal, July 1972

Dynamical models of the excitations of nucleon resonances journal, May 2009

Role of the pion size and flux-tube extension in a baryon-decay model journal, January 1989

Multichannel resonance parametrization of π N scattering amplitudes journal, June 1992

Results from the N * Program at Jefferson Lab journal, May 2011

Masses of Ground- and Excited-State Hadrons journal, March 2011

Measurement of the N → Δ + ( 1232 ) Transition at High-Momentum Transfer by π 0 Electroproduction journal, September 2006

Electroexcitation of nucleon resonances from CLAS data on single pion electroproduction journal, November 2009

Q 2 Dependence of Quadrupole Strength in the γ * p → Δ + ( 1232 ) → p π 0 Transition journal, March 2002

Meson-exchange model for π N scattering and γ N →π N reaction journal, November 1996

?? decay of baryons in a flux-tube-breaking mechanism journal, March 1995

Electroproduction of the Roper resonance on the proton: The role of the three-quark core and the molecular N σ component journal, July 2011

Electromagnetic excitation of nucleon resonances journal, September 2011

Anomalous magnetic moment and limits on fermion substructure journal, November 1980

Solution to Faddeev equations with two-body experimental amplitudes as input and application to J P = 1 / 2 + , S = 0 baryon resonances journal, June 2009

Model analysis of the ep → e ' p π + π − electroproduction reaction on the proton journal, October 2009

π + photoproduction on the proton for photon energies from 0.725 to 2.875 GeV journal, June 2009

Electroproduction of the Roper resonance as a hybrid state journal, July 1992

Excited state baryon spectroscopy from lattice QCD journal, October 2011

Measurement of the polarized structure function σ L T ′ for p ( e ⃗ , e ′ π + ) n in the Δ ( 1232 ) resonance region journal, October 2004

Baryon current matrix elements in a light-front framework journal, April 1995

Lattice results on nucleon/roper properties journal, December 2009

Electromagnetic transition form factors of negative parity nucleon resonances journal, April 1998

Review of Particle Physics journal, July 2010

Dressed-Quark Anomalous Magnetic Moments journal, February 2011

Electroexcitation of nucleon resonances journal, January 2012

Electroproduction of the N * ( 1535 ) Resonance at Large Momentum Transfer journal, August 2009

The physical meaning of scattering matrix singularities in coupled-channel formalisms⋆: BRAG 2007 Workshop summary journal, March 2008

Unitary analytic isobar model for the reaction nucleon-meson to nucleon-meson-meson journal, June 1978

Valence quark contributions for the γ N → P 11 ( 1440 ) form factors journal, April 2010

Lattice study of the N − P 11 transition form factors journal, December 2008

Meson Production and Baryon Resonances at clas journal, February 2011

Phenomenological studies of double charged pion electroproduction from the CLAS data journal, May 2007

Quasi-two-body decays of nonstrange baryons journal, May 1994

Nucleon and Roper electromagnetic elastic and transition form factors journal, February 2012

Electroexcitation of nucleon resonances at Q 2 = 0 . 65 ( GeV / c ) 2 from a combined analysis of single- and double-pion electroproduction data journal, October 2005

A light-front description of electromagnetic form factors for hadrons journal, March 2000

Disentangling the Dynamical Origin of P 11 Nucleon Resonances journal, January 2010

Extended partial-wave analysis of π N scattering data journal, October 2006

On the general theory of collisions for particles with spin journal, August 1959

Pion-nucleon partial-wave analysis to 1100 MeV journal, September 1985

Hybrid baryons in QCD journal, March 2012

Measurement of e p → e ′ p π + π − and Baryon Resonance Analysis journal, July 2003

Connection of Elastic Electromagnetic Nucleon Form Factors at Large Q 2 and Deep Inelastic Structure Functions Near Threshold journal, January 1970

Electromagnetic excitations of baryon resonances journal, July 2005

Nucleon electromagnetic form factors and electroexcitation of low-lying nucleon resonances in a light-front relativistic quark model journal, May 2012

First measurement of target and double spin asymmetries for e → p → → ep π 0 in the nucleon resonance region above the Δ ( 1232 ) journal, October 2008

Isobar channels in the production of π+π− pairs on a proton by virtual photons journal, March 2007

Measurement of the polarized structure function σ LT ′ for p ( e → , e ′ p ) π 0 in the Δ ( 1232 ) resonance region journal, September 2003

Electroexcitation of the P 33 ( 1232 ) , P 11 ( 1440 ) , D 13 ( 1520 ) , and S 11 ( 1535 ) at Q 2 = 0.4 and 0.65 ( GeV / c ) 2 journal, January 2005

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Title: Experimental study of the P₁₁(1440) and D₁₃(1520) resonances from the CLAS data on ep→e^'π⁺π⁻p^'

Quark models of baryon masses and decays
journal, January 2000

Extraction and interpretation of $γ N \to Δ$ form factors within a dynamical model
journal, January 2007

Electroproduction of $p π^{+} π^{-}$ off protons at $0.2 < Q^{2} < 0.6$ ${GeV}^{2}$ and $1.3 < W < 1.57$ GeV with the CLAS detector
journal, January 2009

Single $π^{+}$ electroproduction on the proton in the first and second resonance regions at $0.25 {GeV}^{2} < Q^{2} < 0.65 {GeV}^{2}$
journal, February 2006

Unitary isobar model --MAID2007
journal, October 2007

Pure $S$ -wave covariant model for the nucleon
journal, January 2008

Cross sections and beam asymmetries for $\vec{e} p \to e n π^{+}$ in the nucleon resonance region for $1.7 ⩽ Q^{2} ⩽ 4.5$ GeV $^{2}$
journal, January 2008

Investigation of N-N* Electromagnetic Form Factors within a Front-Form CQM
book, January 1999

A phenomenological description of photo- and electroproduction in nucleon resonance region
journal, June 2000

Double and single pion photoproduction within a dynamical coupled-channels model
journal, December 2009

Extraction of $P_{11}$ resonances from $π N$ data
journal, June 2010

Reaction Models for Meson Production Reactions in the Nucleon Resonance Region
journal, June 2009

γ∗ N → Δ at JLab: Exploring the High Q2 Regime
conference, January 2007

Extraction of electromagnetic transition form factors for nucleon resonances within a dynamical coupled-channels model
journal, October 2010

Baryon resonance analysis from MAID
journal, December 2009

The K-matrix formalism for overlapping resonances
journal, July 1972

Dynamical models of the excitations of nucleon resonances
journal, May 2009

Role of the pion size and flux-tube extension in a baryon-decay model
journal, January 1989

Multichannel resonance parametrization of $π N$ scattering amplitudes
journal, June 1992

Results from the N * Program at Jefferson Lab
journal, May 2011

Masses of Ground- and Excited-State Hadrons
journal, March 2011

Measurement of the $N \to Δ^{+} (1232)$ Transition at High-Momentum Transfer by $π^{0}$ Electroproduction
journal, September 2006

Electroexcitation of nucleon resonances from CLAS data on single pion electroproduction
journal, November 2009

$Q^{2}$ Dependence of Quadrupole Strength in the $γ^{*} p \to Δ^{+} (1232) \to p π^{0}$ Transition
journal, March 2002

Meson-exchange model for π N scattering and γ N →π N reaction
journal, November 1996

?? decay of baryons in a flux-tube-breaking mechanism
journal, March 1995

Electroproduction of the Roper resonance on the proton: The role of the three-quark core and the molecular $N σ$ component
journal, July 2011

Electromagnetic excitation of nucleon resonances
journal, September 2011

Anomalous magnetic moment and limits on fermion substructure
journal, November 1980

Solution to Faddeev equations with two-body experimental amplitudes as input and application to $J^{P} = 1 / 2^{+}$ , $S = 0$ baryon resonances
journal, June 2009

Model analysis of the $ep \to e^{'} p π^{+} π^{-}$ electroproduction reaction on the proton
journal, October 2009

$π^{+}$ photoproduction on the proton for photon energies from 0.725 to 2.875 GeV
journal, June 2009

Electroproduction of the Roper resonance as a hybrid state
journal, July 1992

Excited state baryon spectroscopy from lattice QCD
journal, October 2011

Measurement of the polarized structure function $σ_{L T^{'}}$ for $p (\vec{e}, e^{'} π^{+}) n$ in the $Δ (1232)$ resonance region
journal, October 2004

Baryon current matrix elements in a light-front framework
journal, April 1995

Lattice results on nucleon/roper properties
journal, December 2009

Electromagnetic transition form factors of negative parity nucleon resonances
journal, April 1998

Review of Particle Physics
journal, July 2010

Dressed-Quark Anomalous Magnetic Moments
journal, February 2011

Electroexcitation of nucleon resonances
journal, January 2012

Electroproduction of the $N^{*} (1535)$ Resonance at Large Momentum Transfer
journal, August 2009

The physical meaning of scattering matrix singularities in coupled-channel formalisms⋆: BRAG 2007 Workshop summary
journal, March 2008

Unitary analytic isobar model for the reaction nucleon-meson to nucleon-meson-meson
journal, June 1978

Valence quark contributions for the $γ N \to P_{11} (1440)$ form factors
journal, April 2010

Lattice study of the $N − P_{11}$ transition form factors
journal, December 2008

Meson Production and Baryon Resonances at clas
journal, February 2011

Phenomenological studies of double charged pion electroproduction from the CLAS data
journal, May 2007

Quasi-two-body decays of nonstrange baryons
journal, May 1994

Nucleon and Roper electromagnetic elastic and transition form factors
journal, February 2012

Electroexcitation of nucleon resonances at $Q^{2} = 0.65 (GeV / c)^{2}$ from a combined analysis of single- and double-pion electroproduction data
journal, October 2005

A light-front description of electromagnetic form factors for hadrons
journal, March 2000

Disentangling the Dynamical Origin of $P_{11}$ Nucleon Resonances
journal, January 2010

Extended partial-wave analysis of $π N$ scattering data
journal, October 2006

On the general theory of collisions for particles with spin
journal, August 1959

Pion-nucleon partial-wave analysis to 1100 MeV
journal, September 1985

Hybrid baryons in QCD
journal, March 2012

Measurement of $e p \to e^{'} p π^{+} π^{-}$ and Baryon Resonance Analysis
journal, July 2003

Connection of Elastic Electromagnetic Nucleon Form Factors at Large $Q^{2}$ and Deep Inelastic Structure Functions Near Threshold
journal, January 1970

Electromagnetic excitations of baryon resonances
journal, July 2005

Nucleon electromagnetic form factors and electroexcitation of low-lying nucleon resonances in a light-front relativistic quark model
journal, May 2012

First measurement of target and double spin asymmetries for $\vec{e} \vec{p} \to ep π^{0}$ in the nucleon resonance region above the $Δ (1232)$
journal, October 2008

Isobar channels in the production of π+π− pairs on a proton by virtual photons
journal, March 2007

Measurement of the polarized structure function $σ_{{LT}^{'}}$ for $p (\vec{e} {, e}^{'} p) π^{0}$ in the $Δ (1232)$ resonance region
journal, September 2003

Electroexcitation of the $P_{33} (1232)$ , $P_{11} (1440)$ , $D_{13} (1520)$ , and $S_{11} (1535)$ at $Q^{2} = 0.4$ and $0.65 (GeV / c)^{2}$
journal, January 2005

Baryon form factors of relativistic constituent-quark models
journal, March 2004