Measurement of the helicity asymmetry E for the γ→ p→ → pπ reaction in the resonance region: The CLAS Collaboration

C. W. Kim; N. Zachariou; M. Bashkanov; W. J. Briscoe; S. Fegan; V. L. Kashevarov; K. Nikonov; A. Sarantsev; A. Schmidt; I. I. Strakovsky; D. P. Watts; R. L. Workman; P. Achenbach; Z. Akbar; M. J. Amaryan; G. Angelini; W. R. Armstrong; H. Atac; L. Baashen; N. A. Baltzell; L. Barion; M. Battaglieri; I. Bedlinskiy; B. Benkel; F. Benmokhtar; N. Benmouna; A. Bianconi; A. S. Biselli; W. A. Booth; F. Bossù; S. Boiarinov; K. T. Brinkmann; J. Brock; D. Bulumulla; V. D. Burkert; T. Cao; C. Carlin; D. S. Carman; J. C. Carvajal; P. Chatagnon; V. Chesnokov; T. Chetry; G. Ciullo; G. Clash; P. L. Cole; M. Contalbrigo; O. Cortes Becerra; G. Costantini; V. Crede; A. D’Angelo; N. Dashyan; R. De Vita; M. Defurne; A. Deur; S. Diehl; C. Djalali; M. Dugger; R. Dupre; H. Egiyan; A. El Alaoui; L. El Fassi; L. Elouadrhiri; P. Eugenio; A. Filippi; C. Fogler; G. Gavalian; G. P. Gilfoyle; A. A. Golubenko; G. Gosta; R. W. Gothe; K. A. Griffioen; K. Hafidi; H. Hakobyan; M. Hattawy; F. Hauenstein; T. B. Hayward; D. Heddle; A. Hobart; M. Holtrop; Y. Ilieva; I. Illari; D. G. Ireland; E. L. Isupov; H. Iwamoto; D. Jenkins; H. S. Jo; R. Johnston; K. Joo; S. Joosten; T. Kageya; C. D. Keith; D. Keller; A. Khanal; A. Kim; W. Kim; F. J. Klein; V. Klimenko; A. Kripko; V. Kubarovsky; L. Lanza; M. Leali; S. Lee; X. Li; K. Livingston; I. J.D. MacGregor; D. Marchand; V. Mascagna; B. McKinnon; S. Migliorati; R. G. Milner; T. Mineeva; V. Mokeev; C. Munoz Camacho; P. Nadel-Turonski; K. Neupane; S. Niccolai; M. Osipenko; A. I. Ostrovidov; P. Pandey; M. Paolone; L. L. Pappalardo; R. Paremuzyan; E. Pasyuk; S. J. Paul; N. Pilleux; M. Pokhrel; J. Poudel; J. W. Price; Y. Prok; A. Radic; N. Ramasubramanian; S. Ratliff; T. Reed; J. Richards; M. Ripani; B. G. Ritchie; J. Ritman; G. Rosner; C. Salgado; S. Schadmand; D. Schott; R. A. Schumacher; M. B.C. Scott; M. L. Seely; E. M. Seroka; E. V. Shirokov; U. Shrestha; D. Sokhan; N. Sparveris; M. Spreafico; S. Strauch; J. Tan; R. Tyson; M. Ungaro; S. Vallarino; L. Venturelli; H. Voskanyan; E. Voutier; X. Wei; R. Williams; R. Wishart; M. H. Wood; M. Yurov; J. Zhang; M. Zurek

doi:10.1140/epja/s10050-023-01123-3

Measurement of the helicity asymmetry E for the γ→ p→ → pπ reaction in the resonance region: The CLAS Collaboration

C. W. Kim, N. Zachariou, M. Bashkanov, W. J. Briscoe, S. Fegan, V. L. Kashevarov, K. Nikonov, A. Sarantsev, A. Schmidt, I. I. Strakovsky, D. P. Watts, R. L. Workman, P. Achenbach, Z. Akbar, M. J. Amaryan, G. Angelini, W. R. Armstrong, H. Atac, L. Baashen, N. A. BaltzellL. Barion, M. Battaglieri, I. Bedlinskiy, B. Benkel, F. Benmokhtar, N. Benmouna, A. Bianconi, A. S. Biselli, W. A. Booth, F. Bossù, S. Boiarinov, K. T. Brinkmann, J. Brock, D. Bulumulla, V. D. Burkert, T. Cao, C. Carlin, D. S. Carman, J. C. Carvajal, P. Chatagnon, V. Chesnokov, T. Chetry, G. Ciullo, G. Clash, P. L. Cole, M. Contalbrigo, O. Cortes Becerra, G. Costantini, V. Crede, A. D’Angelo, N. Dashyan, R. De Vita, M. Defurne, A. Deur, S. Diehl, C. Djalali, M. Dugger, R. Dupre, H. Egiyan, A. El Alaoui, L. El Fassi, L. Elouadrhiri, P. Eugenio, A. Filippi, C. Fogler, G. Gavalian, G. P. Gilfoyle, A. A. Golubenko, G. Gosta, R. W. Gothe, K. A. Griffioen, K. Hafidi, H. Hakobyan, M. Hattawy, F. Hauenstein, T. B. Hayward, D. Heddle, A. Hobart, M. Holtrop, Y. Ilieva, I. Illari, D. G. Ireland, E. L. Isupov, H. Iwamoto, D. Jenkins, H. S. Jo, R. Johnston, K. Joo, S. Joosten, T. Kageya, C. D. Keith, D. Keller, A. Khanal, A. Kim, W. Kim, F. J. Klein, V. Klimenko, A. Kripko, V. Kubarovsky, L. Lanza, M. Leali, S. Lee, X. Li, K. Livingston, I. J.D. MacGregor, D. Marchand, V. Mascagna, B. McKinnon, S. Migliorati, R. G. Milner, T. Mineeva, V. Mokeev, C. Munoz Camacho, P. Nadel-Turonski, K. Neupane, S. Niccolai, M. Osipenko, A. I. Ostrovidov, P. Pandey, M. Paolone, L. L. Pappalardo, R. Paremuzyan, E. Pasyuk, S. J. Paul, N. Pilleux, M. Pokhrel, J. Poudel, J. W. Price, Y. Prok, A. Radic, N. Ramasubramanian, S. Ratliff, T. Reed, J. Richards, M. Ripani, B. G. Ritchie, J. Ritman, G. Rosner, C. Salgado, S. Schadmand, D. Schott, R. A. Schumacher, M. B.C. Scott, M. L. Seely, E. M. Seroka, E. V. Shirokov, U. Shrestha, D. Sokhan, N. Sparveris, M. Spreafico, S. Strauch, J. Tan, R. Tyson, M. Ungaro, S. Vallarino, L. Venturelli, H. Voskanyan, E. Voutier, X. Wei, R. Williams, R. Wishart, M. H. Wood, M. Yurov, J. Zhang, M. Zurek

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Abstract

The double-spin-polarization observable E for γ→ p→ → pπ has been measured with the CEBAF Large Acceptance Spectrometer (CLAS) at photon beam energies E_γ from 0.367 to 2.173GeV (corresponding to center-of-mass energies from 1.240 to 2.200GeV) for pion center-of-mass angles, cosθπ0c.m. , between - 0.86 and 0.82. These new CLAS measurements cover a broader energy range and have smaller uncertainties compared to previous CBELSA data and provide an important independent check on systematics. These measurements are compared to predictions as well as new global fits from The George Washington University, Mainz, and Bonn-Gatchina groups. Their inclusion in multipole analyses will allow us to refine our understanding of the single-pion production contribution to the Gerasimov-Drell-Hearn sum rule and improve the determination of resonance properties, which will be presented in a future publication.

Original language	English (US)
Article number	217
Journal	European Physical Journal A
Volume	59
Issue number	9
DOIs	https://doi.org/10.1140/epja/s10050-023-01123-3
State	Published - Sep 2023

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1140/epja/s10050-023-01123-3

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Kim, C. W., Zachariou, N., Bashkanov, M., Briscoe, W. J., Fegan, S., Kashevarov, V. L., Nikonov, K., Sarantsev, A., Schmidt, A., Strakovsky, I. I., Watts, D. P., Workman, R. L., Achenbach, P., Akbar, Z., Amaryan, M. J., Angelini, G., Armstrong, W. R., Atac, H., Baashen, L., ... Zurek, M. (2023). Measurement of the helicity asymmetry E for the γ→ p→ → pπ reaction in the resonance region: The CLAS Collaboration. European Physical Journal A, 59(9), Article 217. https://doi.org/10.1140/epja/s10050-023-01123-3

Kim, CW, Zachariou, N, Bashkanov, M, Briscoe, WJ, Fegan, S, Kashevarov, VL, Nikonov, K, Sarantsev, A, Schmidt, A, Strakovsky, II, Watts, DP, Workman, RL, Achenbach, P, Akbar, Z, Amaryan, MJ, Angelini, G, Armstrong, WR, Atac, H, Baashen, L, Baltzell, NA, Barion, L, Battaglieri, M, Bedlinskiy, I, Benkel, B, Benmokhtar, F, Benmouna, N, Bianconi, A, Biselli, AS, Booth, WA, Bossù, F, Boiarinov, S, Brinkmann, KT, Brock, J, Bulumulla, D, Burkert, VD, Cao, T, Carlin, C, Carman, DS, Carvajal, JC, Chatagnon, P, Chesnokov, V, Chetry, T, Ciullo, G, Clash, G, Cole, PL, Contalbrigo, M, Becerra, OC, Costantini, G, Crede, V, D’Angelo, A, Dashyan, N, De Vita, R, Defurne, M, Deur, A, Diehl, S, Djalali, C, Dugger, M, Dupre, R, Egiyan, H, Alaoui, AE, Fassi, LE, Elouadrhiri, L, Eugenio, P, Filippi, A, Fogler, C, Gavalian, G, Gilfoyle, GP, Golubenko, AA, Gosta, G, Gothe, RW, Griffioen, KA, Hafidi, K, Hakobyan, H, Hattawy, M, Hauenstein, F, Hayward, TB, Heddle, D, Hobart, A, Holtrop, M, Ilieva, Y, Illari, I, Ireland, DG, Isupov, EL, Iwamoto, H, Jenkins, D, Jo, HS, Johnston, R, Joo, K, Joosten, S, Kageya, T, Keith, CD, Keller, D, Khanal, A, Kim, A, Kim, W, Klein, FJ, Klimenko, V, Kripko, A, Kubarovsky, V, Lanza, L, Leali, M, Lee, S, Li, X, Livingston, K, MacGregor, IJD, Marchand, D, Mascagna, V, McKinnon, B, Migliorati, S, Milner, RG, Mineeva, T, Mokeev, V, Camacho, CM, Nadel-Turonski, P, Neupane, K, Niccolai, S, Osipenko, M, Ostrovidov, AI, Pandey, P, Paolone, M, Pappalardo, LL, Paremuzyan, R, Pasyuk, E, Paul, SJ, Pilleux, N, Pokhrel, M, Poudel, J, Price, JW, Prok, Y, Radic, A, Ramasubramanian, N, Ratliff, S, Reed, T, Richards, J, Ripani, M, Ritchie, BG, Ritman, J, Rosner, G, Salgado, C, Schadmand, S, Schott, D, Schumacher, RA, Scott, MBC, Seely, ML, Seroka, EM, Shirokov, EV, Shrestha, U, Sokhan, D, Sparveris, N, Spreafico, M, Strauch, S, Tan, J, Tyson, R, Ungaro, M, Vallarino, S, Venturelli, L, Voskanyan, H, Voutier, E, Wei, X, Williams, R, Wishart, R, Wood, MH, Yurov, M, Zhang, J & Zurek, M 2023, 'Measurement of the helicity asymmetry E for the γ→ p→ → pπ reaction in the resonance region: The CLAS Collaboration', European Physical Journal A, vol. 59, no. 9, 217. https://doi.org/10.1140/epja/s10050-023-01123-3

@article{3eba325ca117476db0fe08e30be2cf91,

title = "Measurement of the helicity asymmetry E for the γ→ p→ → pπ reaction in the resonance region: The CLAS Collaboration",

abstract = "The double-spin-polarization observable E for γ→ p→ → pπ has been measured with the CEBAF Large Acceptance Spectrometer (CLAS) at photon beam energies Eγ from 0.367 to 2.173GeV (corresponding to center-of-mass energies from 1.240 to 2.200GeV) for pion center-of-mass angles, cosθπ0c.m. , between - 0.86 and 0.82. These new CLAS measurements cover a broader energy range and have smaller uncertainties compared to previous CBELSA data and provide an important independent check on systematics. These measurements are compared to predictions as well as new global fits from The George Washington University, Mainz, and Bonn-Gatchina groups. Their inclusion in multipole analyses will allow us to refine our understanding of the single-pion production contribution to the Gerasimov-Drell-Hearn sum rule and improve the determination of resonance properties, which will be presented in a future publication.",

author = "Kim, {C. W.} and N. Zachariou and M. Bashkanov and Briscoe, {W. J.} and S. Fegan and Kashevarov, {V. L.} and K. Nikonov and A. Sarantsev and A. Schmidt and Strakovsky, {I. I.} and Watts, {D. P.} and Workman, {R. L.} and P. Achenbach and Z. Akbar and Amaryan, {M. J.} and G. Angelini and Armstrong, {W. R.} and H. Atac and L. Baashen and Baltzell, {N. A.} and L. Barion and M. Battaglieri and I. Bedlinskiy and B. Benkel and F. Benmokhtar and N. Benmouna and A. Bianconi and Biselli, {A. S.} and Booth, {W. A.} and F. Boss{\`u} and S. Boiarinov and Brinkmann, {K. T.} and J. Brock and D. Bulumulla and Burkert, {V. D.} and T. Cao and C. Carlin and Carman, {D. S.} and Carvajal, {J. C.} and P. Chatagnon and V. Chesnokov and T. Chetry and G. Ciullo and G. Clash and Cole, {P. L.} and M. Contalbrigo and Becerra, {O. Cortes} and G. Costantini and V. Crede and A. D{\textquoteright}Angelo and N. Dashyan and {De Vita}, R. and M. Defurne and A. Deur and S. Diehl and C. Djalali and M. Dugger and R. Dupre and H. Egiyan and Alaoui, {A. El} and Fassi, {L. El} and L. Elouadrhiri and P. Eugenio and A. Filippi and C. Fogler and G. Gavalian and Gilfoyle, {G. P.} and Golubenko, {A. A.} and G. Gosta and Gothe, {R. W.} and Griffioen, {K. A.} and K. Hafidi and H. Hakobyan and M. Hattawy and F. Hauenstein and Hayward, {T. B.} and D. Heddle and A. Hobart and M. Holtrop and Y. Ilieva and I. Illari and Ireland, {D. G.} and Isupov, {E. L.} and H. Iwamoto and D. Jenkins and Jo, {H. S.} and R. Johnston and K. Joo and S. Joosten and T. Kageya and Keith, {C. D.} and D. Keller and A. Khanal and A. Kim and W. Kim and Klein, {F. J.} and V. Klimenko and A. Kripko and V. Kubarovsky and L. Lanza and M. Leali and S. Lee and X. Li and K. Livingston and MacGregor, {I. J.D.} and D. Marchand and V. Mascagna and B. McKinnon and S. Migliorati and Milner, {R. G.} and T. Mineeva and V. Mokeev and Camacho, {C. Munoz} and P. Nadel-Turonski and K. Neupane and S. Niccolai and M. Osipenko and Ostrovidov, {A. I.} and P. Pandey and M. Paolone and Pappalardo, {L. L.} and R. Paremuzyan and E. Pasyuk and Paul, {S. J.} and N. Pilleux and M. Pokhrel and J. Poudel and Price, {J. W.} and Y. Prok and A. Radic and N. Ramasubramanian and S. Ratliff and T. Reed and J. Richards and M. Ripani and Ritchie, {B. G.} and J. Ritman and G. Rosner and C. Salgado and S. Schadmand and D. Schott and Schumacher, {R. A.} and Scott, {M. B.C.} and Seely, {M. L.} and Seroka, {E. M.} and Shirokov, {E. V.} and U. Shrestha and D. Sokhan and N. Sparveris and M. Spreafico and S. Strauch and J. Tan and R. Tyson and M. Ungaro and S. Vallarino and L. Venturelli and H. Voskanyan and E. Voutier and X. Wei and R. Williams and R. Wishart and Wood, {M. H.} and M. Yurov and J. Zhang and M. Zurek",

note = "Publisher Copyright: {\textcopyright} 2023, The Author(s).",

year = "2023",

month = sep,

doi = "10.1140/epja/s10050-023-01123-3",

language = "English (US)",

volume = "59",

journal = "European Physical Journal A",

issn = "1434-6001",

publisher = "Springer New York",

number = "9",

}

TY - JOUR

T1 - Measurement of the helicity asymmetry E for the γ→ p→ → pπ reaction in the resonance region

T2 - The CLAS Collaboration

AU - Kim, C. W.

AU - Zachariou, N.

AU - Bashkanov, M.

AU - Briscoe, W. J.

AU - Fegan, S.

AU - Kashevarov, V. L.

AU - Nikonov, K.

AU - Sarantsev, A.

AU - Schmidt, A.

AU - Strakovsky, I. I.

AU - Watts, D. P.

AU - Workman, R. L.

AU - Achenbach, P.

AU - Akbar, Z.

AU - Amaryan, M. J.

AU - Angelini, G.

AU - Armstrong, W. R.

AU - Atac, H.

AU - Baashen, L.

AU - Baltzell, N. A.

AU - Barion, L.

AU - Battaglieri, M.

AU - Bedlinskiy, I.

AU - Benkel, B.

AU - Benmokhtar, F.

AU - Benmouna, N.

AU - Bianconi, A.

AU - Biselli, A. S.

AU - Booth, W. A.

AU - Bossù, F.

AU - Boiarinov, S.

AU - Brinkmann, K. T.

AU - Brock, J.

AU - Bulumulla, D.

AU - Burkert, V. D.

AU - Cao, T.

AU - Carlin, C.

AU - Carman, D. S.

AU - Carvajal, J. C.

AU - Chatagnon, P.

AU - Chesnokov, V.

AU - Chetry, T.

AU - Ciullo, G.

AU - Clash, G.

AU - Cole, P. L.

AU - Contalbrigo, M.

AU - Becerra, O. Cortes

AU - Costantini, G.

AU - Crede, V.

AU - D’Angelo, A.

AU - Dashyan, N.

AU - De Vita, R.

AU - Defurne, M.

AU - Deur, A.

AU - Diehl, S.

AU - Djalali, C.

AU - Dugger, M.

AU - Dupre, R.

AU - Egiyan, H.

AU - Alaoui, A. El

AU - Fassi, L. El

AU - Elouadrhiri, L.

AU - Eugenio, P.

AU - Filippi, A.

AU - Fogler, C.

AU - Gavalian, G.

AU - Gilfoyle, G. P.

AU - Golubenko, A. A.

AU - Gosta, G.

AU - Gothe, R. W.

AU - Griffioen, K. A.

AU - Hafidi, K.

AU - Hakobyan, H.

AU - Hattawy, M.

AU - Hauenstein, F.

AU - Hayward, T. B.

AU - Heddle, D.

AU - Hobart, A.

AU - Holtrop, M.

AU - Ilieva, Y.

AU - Illari, I.

AU - Ireland, D. G.

AU - Isupov, E. L.

AU - Iwamoto, H.

AU - Jenkins, D.

AU - Jo, H. S.

AU - Johnston, R.

AU - Joo, K.

AU - Joosten, S.

AU - Kageya, T.

AU - Keith, C. D.

AU - Keller, D.

AU - Khanal, A.

AU - Kim, A.

AU - Kim, W.

AU - Klein, F. J.

AU - Klimenko, V.

AU - Kripko, A.

AU - Kubarovsky, V.

AU - Lanza, L.

AU - Leali, M.

AU - Lee, S.

AU - Li, X.

AU - Livingston, K.

AU - MacGregor, I. J.D.

AU - Marchand, D.

AU - Mascagna, V.

AU - McKinnon, B.

AU - Migliorati, S.

AU - Milner, R. G.

AU - Mineeva, T.

AU - Mokeev, V.

AU - Camacho, C. Munoz

AU - Nadel-Turonski, P.

AU - Neupane, K.

AU - Niccolai, S.

AU - Osipenko, M.

AU - Ostrovidov, A. I.

AU - Pandey, P.

AU - Paolone, M.

AU - Pappalardo, L. L.

AU - Paremuzyan, R.

AU - Pasyuk, E.

AU - Paul, S. J.

AU - Pilleux, N.

AU - Pokhrel, M.

AU - Poudel, J.

AU - Price, J. W.

AU - Prok, Y.

AU - Radic, A.

AU - Ramasubramanian, N.

AU - Ratliff, S.

AU - Reed, T.

AU - Richards, J.

AU - Ripani, M.

AU - Ritchie, B. G.

AU - Ritman, J.

AU - Rosner, G.

AU - Salgado, C.

AU - Schadmand, S.

AU - Schott, D.

AU - Schumacher, R. A.

AU - Scott, M. B.C.

AU - Seely, M. L.

AU - Seroka, E. M.

AU - Shirokov, E. V.

AU - Shrestha, U.

AU - Sokhan, D.

AU - Sparveris, N.

AU - Spreafico, M.

AU - Strauch, S.

AU - Tan, J.

AU - Tyson, R.

AU - Ungaro, M.

AU - Vallarino, S.

AU - Venturelli, L.

AU - Voskanyan, H.

AU - Voutier, E.

AU - Wei, X.

AU - Williams, R.

AU - Wishart, R.

AU - Wood, M. H.

AU - Yurov, M.

AU - Zhang, J.

AU - Zurek, M.

PY - 2023/9

Y1 - 2023/9

N2 - The double-spin-polarization observable E for γ→ p→ → pπ has been measured with the CEBAF Large Acceptance Spectrometer (CLAS) at photon beam energies Eγ from 0.367 to 2.173GeV (corresponding to center-of-mass energies from 1.240 to 2.200GeV) for pion center-of-mass angles, cosθπ0c.m. , between - 0.86 and 0.82. These new CLAS measurements cover a broader energy range and have smaller uncertainties compared to previous CBELSA data and provide an important independent check on systematics. These measurements are compared to predictions as well as new global fits from The George Washington University, Mainz, and Bonn-Gatchina groups. Their inclusion in multipole analyses will allow us to refine our understanding of the single-pion production contribution to the Gerasimov-Drell-Hearn sum rule and improve the determination of resonance properties, which will be presented in a future publication.

AB - The double-spin-polarization observable E for γ→ p→ → pπ has been measured with the CEBAF Large Acceptance Spectrometer (CLAS) at photon beam energies Eγ from 0.367 to 2.173GeV (corresponding to center-of-mass energies from 1.240 to 2.200GeV) for pion center-of-mass angles, cosθπ0c.m. , between - 0.86 and 0.82. These new CLAS measurements cover a broader energy range and have smaller uncertainties compared to previous CBELSA data and provide an important independent check on systematics. These measurements are compared to predictions as well as new global fits from The George Washington University, Mainz, and Bonn-Gatchina groups. Their inclusion in multipole analyses will allow us to refine our understanding of the single-pion production contribution to the Gerasimov-Drell-Hearn sum rule and improve the determination of resonance properties, which will be presented in a future publication.

UR - http://www.scopus.com/inward/record.url?scp=85172243196&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85172243196&partnerID=8YFLogxK

U2 - 10.1140/epja/s10050-023-01123-3

DO - 10.1140/epja/s10050-023-01123-3

M3 - Article

AN - SCOPUS:85172243196

SN - 1434-6001

VL - 59

JO - European Physical Journal A

JF - European Physical Journal A

IS - 9

M1 - 217

ER -

Measurement of the helicity asymmetry E for the γ→ p→ → pπ reaction in the resonance region: The CLAS Collaboration

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