Evidence for a backward peak in the γd → π0d cross section near the η threshold

Y. Ilieva; B. L. Berman; A. E. Kudryavtsev; I. I. Strakovsky; V. E. Tarasov; M. Amarian; P. Ambrozewicz; M. Anghinolfi; G. Asryan; H. Avakian; H. Bagdasaryan; N. Baillie; J. P. Ball; N. A. Baltzell; V. Batourine; M. Battaglieri; I. Bedlinskiy; M. Bellis; N. Benmouna; A. S. Biselli; S. Bouchigny; S. Boiarinov; R. Bradford; D. Branford; W. J. Briscoe; W. K. Brooks; S. Bültmann; V. D. Burkert; C. Butuceanu; J. R. Calarco; S. L. Careccia; D. S. Carman; S. Chen; P. L. Cole; P. Collins; P. Coltharp; D. Crabb; V. Crede; R. de Masi; E. de Sanctis; R. de Vita; P. V. Degtyarenko; A. Deur; R. Dickson; C. Djalali; G. E. Dodge; J. Donnelly; D. Doughty; M. Dugger; O. P. Dzyubak; H. Egiyan; K. S. Egiyan; L. Elouadrhiri; P. Eugenio; G. Fedotov; G. Feldman; H. Funsten; M. Garçon; G. Gavalian; G. P. Gilfoyle; K. L. Giovanetti; F. X. Girod; J. T. Goetz; A. Gonenc; R. W. Gothe; K. A. Griffioen; M. Guidal; N. Guler; L. Guo; V. Gyurjyan; K. Hafidi; R. S. Hakobyan; F. W. Hersman; K. Hicks; I. Hleiqawi; M. Holtrop; C. E. Hyde-Wright; D. G. Ireland; B. S. Ishkhanov; E. L. Isupov; M. M. Ito; D. Jenkins; H. S. Jo; K. Joo; H. G. Juengst; N. Kalantarians; J. D. Kellie; M. Khandaker; W. Kim; A. Klein; F. J. Klein; M. Kossov; Z. Krahn; L. H. Kramer; V. Kubarovsky; J. Kuhn; S. E. Kuhn; S. V. Kuleshov; J. Lachniet; J. M. Laget; J. Langheinrich; D. Lawrence; K. Livingston; H. Lu; M. MacCormick; N. Markov; B. McKinnon; B. A. Mecking; M. D. Mestayer; C. A. Meyer; T. Mibe; K. Mikhailov; M. Mirazita; R. Miskimen; V. Mokeev; K. Moriya; S. A. Morrow; M. Moteabbed; E. Munevar; G. S. Mutchler; P. Nadel-Turonski; R. Nasseripour; S. Niccolai; G. Niculescu; I. Niculescu; B. B. Niczyporuk; M. R. Niroula; R. A. Niyazov; M. Nozar; M. Osipenko; A. I. Ostrovidov; K. Park; E. Pasyuk; C. Paterson; J. Pierce; N. Pivnyuk; O. Pogorelko; S. Pozdniakov; J. W. Price; Y. Prok; D. Protopopescu; B. A. Raue; G. Ricco; M. Ripani; B. G. Ritchie; F. Ronchetti; G. Rosner; P. Rossi; F. Sabatié; C. Salgado; J. P. Santoro; V. Sapunenko; R. A. Schumacher; V. S. Serov; Y. G. Sharabian; N. V. Shvedunov; E. S. Smith; L. C. Smith; D. I. Sober; A. Stavinsky; S. S. Stepanyan; S. Stepanyan; B. E. Stokes; P. Stoler; S. Strauch; M. Taiuti; D. J. Tedeschi; U. Thoma; A. Tkabladze; S. Tkachenko; C. Tur; M. Ungaro; M. F. Vineyard; A. V. Vlassov; D. P. Watts; L. B. Weinstein; D. P. Weygand; M. Williams; E. Wolin; M. H. Wood; A. Yegneswaran; L. Zana; J. Zhang; B. Zhao; Z. Zhao

doi:10.1140/epja/i2010-10918-x

Evidence for a backward peak in the γd → π⁰d cross section near the η threshold

Y. Ilieva
, B. L. Berman
, A. E. Kudryavtsev
, I. I. Strakovsky
, V. E. Tarasov
, M. Amarian
, P. Ambrozewicz
, M. Anghinolfi
, G. Asryan
, H. Avakian
, H. Bagdasaryan
, N. Baillie
, J. P. Ball
, N. A. Baltzell
, V. Batourine
, M. Battaglieri
, I. Bedlinskiy
, M. Bellis
, N. Benmouna
, A. S. Biselli

S. Bouchigny, S. Boiarinov, R. Bradford, D. Branford, W. J. Briscoe, W. K. Brooks, S. Bültmann, V. D. Burkert, C. Butuceanu, J. R. Calarco, S. L. Careccia, D. S. Carman, S. Chen, P. L. Cole, P. Collins, P. Coltharp, D. Crabb, V. Crede, R. de Masi, E. de Sanctis, R. de Vita, P. V. Degtyarenko, A. Deur, R. Dickson, C. Djalali, G. E. Dodge, J. Donnelly, D. Doughty, M. Dugger, O. P. Dzyubak, H. Egiyan, K. S. Egiyan, L. Elouadrhiri, P. Eugenio, G. Fedotov, G. Feldman, H. Funsten, M. Garçon, G. Gavalian, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, J. T. Goetz, A. Gonenc, R. W. Gothe, K. A. Griffioen, M. Guidal, N. Guler, L. Guo, V. Gyurjyan, K. Hafidi, R. S. Hakobyan, F. W. Hersman, K. Hicks, I. Hleiqawi, M. Holtrop, C. E. Hyde-Wright, D. G. Ireland, B. S. Ishkhanov, E. L. Isupov, M. M. Ito, D. Jenkins, H. S. Jo, K. Joo, H. G. Juengst, N. Kalantarians, J. D. Kellie, M. Khandaker, W. Kim, A. Klein, F. J. Klein, M. Kossov, Z. Krahn, L. H. Kramer, V. Kubarovsky, J. Kuhn, S. E. Kuhn, S. V. Kuleshov, J. Lachniet, J. M. Laget, J. Langheinrich, D. Lawrence, K. Livingston, H. Lu, M. MacCormick, N. Markov, B. McKinnon, B. A. Mecking, M. D. Mestayer, C. A. Meyer, T. Mibe, K. Mikhailov, M. Mirazita, R. Miskimen, V. Mokeev, K. Moriya, S. A. Morrow, M. Moteabbed, E. Munevar, G. S. Mutchler, P. Nadel-Turonski, R. Nasseripour, S. Niccolai, G. Niculescu, I. Niculescu, B. B. Niczyporuk, M. R. Niroula, R. A. Niyazov, M. Nozar, M. Osipenko, A. I. Ostrovidov, K. Park, E. Pasyuk, C. Paterson, J. Pierce, N. Pivnyuk, O. Pogorelko, S. Pozdniakov, J. W. Price, Y. Prok, D. Protopopescu, B. A. Raue, G. Ricco, M. Ripani, B. G. Ritchie, F. Ronchetti, G. Rosner, P. Rossi, F. Sabatié, C. Salgado, J. P. Santoro, V. Sapunenko, R. A. Schumacher, V. S. Serov, Y. G. Sharabian, N. V. Shvedunov, E. S. Smith, L. C. Smith, D. I. Sober, A. Stavinsky, S. S. Stepanyan, S. Stepanyan, B. E. Stokes, P. Stoler, S. Strauch, M. Taiuti, D. J. Tedeschi, U. Thoma, A. Tkabladze, S. Tkachenko, C. Tur, M. Ungaro, M. F. Vineyard, A. V. Vlassov, D. P. Watts, L. B. Weinstein, D. P. Weygand, M. Williams, E. Wolin, M. H. Wood, A. Yegneswaran, L. Zana, J. Zhang, B. Zhao, Z. Zhao

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

High-quality cross sections for the reaction γd → π⁰d have been measured using the CLAS at Jefferson Lab over a wide energy range near and above the η-meson photoproduction threshold. At backward c. m. angles for the outgoing pions, we observe a resonance-like structure near E_γ = 700 MeV. Our model analysis shows that it can be explained by η excitation in the intermediate state. The effect is the result of the contribution of the N(1535)S₁₁-resonance to the amplitudes of the subprocesses occurring between the two nucleons and of a two-step process in which the excitation of an intermediate η-meson dominates.

Original language	English
Pages (from-to)	261-267
Number of pages	7
Journal	European Physical Journal A
Volume	43
Issue number	3
DOIs	https://doi.org/10.1140/epja/i2010-10918-x
State	Published - 2010
Externally published	Yes

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10.1140/epja/i2010-10918-x

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Ilieva, Y., Berman, B. L., Kudryavtsev, A. E., Strakovsky, I. I., Tarasov, V. E., Amarian, M., Ambrozewicz, P., Anghinolfi, M., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J. P., Baltzell, N. A., Batourine, V., Battaglieri, M., Bedlinskiy, I., Bellis, M., Benmouna, N., ... Zhao, Z. (2010). Evidence for a backward peak in the γd → π⁰d cross section near the η threshold. European Physical Journal A, 43(3), 261-267. https://doi.org/10.1140/epja/i2010-10918-x

@article{863f6747cf6c4bccafef2840cc578091,

title = "Evidence for a backward peak in the γd → π0d cross section near the η threshold",

abstract = "High-quality cross sections for the reaction γd → π0d have been measured using the CLAS at Jefferson Lab over a wide energy range near and above the η-meson photoproduction threshold. At backward c. m. angles for the outgoing pions, we observe a resonance-like structure near Eγ = 700 MeV. Our model analysis shows that it can be explained by η excitation in the intermediate state. The effect is the result of the contribution of the N(1535)S11-resonance to the amplitudes of the subprocesses occurring between the two nucleons and of a two-step process in which the excitation of an intermediate η-meson dominates.",

author = "Y. Ilieva and Berman, \{B. L.\} and Kudryavtsev, \{A. E.\} and Strakovsky, \{I. I.\} and Tarasov, \{V. E.\} and M. Amarian and P. Ambrozewicz and M. Anghinolfi and G. Asryan and H. Avakian and H. Bagdasaryan and N. Baillie and Ball, \{J. P.\} and Baltzell, \{N. A.\} and V. Batourine and M. Battaglieri and I. Bedlinskiy and M. Bellis and N. Benmouna and Biselli, \{A. S.\} and S. Bouchigny and S. Boiarinov and R. Bradford and D. Branford and Briscoe, \{W. J.\} and Brooks, \{W. K.\} and S. B{\"u}ltmann and Burkert, \{V. D.\} and C. Butuceanu and Calarco, \{J. R.\} and Careccia, \{S. L.\} and Carman, \{D. S.\} and S. Chen and Cole, \{P. L.\} and P. Collins and P. Coltharp and D. Crabb and V. Crede and \{de Masi\}, R. and \{de Sanctis\}, E. and \{de Vita\}, R. and Degtyarenko, \{P. V.\} and A. Deur and R. Dickson and C. Djalali and Dodge, \{G. E.\} and J. Donnelly and D. Doughty and M. Dugger and Dzyubak, \{O. P.\} and H. Egiyan and Egiyan, \{K. S.\} and L. Elouadrhiri and P. Eugenio and G. Fedotov and G. Feldman and H. Funsten and M. Gar{\c c}on and G. Gavalian and Gilfoyle, \{G. P.\} and Giovanetti, \{K. L.\} and Girod, \{F. X.\} and Goetz, \{J. T.\} and A. Gonenc and Gothe, \{R. W.\} and Griffioen, \{K. A.\} and M. Guidal and N. Guler and L. Guo and V. Gyurjyan and K. Hafidi and Hakobyan, \{R. S.\} and Hersman, \{F. W.\} and K. Hicks and I. Hleiqawi and M. Holtrop and Hyde-Wright, \{C. E.\} and Ireland, \{D. G.\} and Ishkhanov, \{B. S.\} and Isupov, \{E. L.\} and Ito, \{M. M.\} and D. Jenkins and Jo, \{H. S.\} and K. Joo and Juengst, \{H. G.\} and N. Kalantarians and Kellie, \{J. D.\} and M. Khandaker and W. Kim and A. Klein and Klein, \{F. J.\} and M. Kossov and Z. Krahn and Kramer, \{L. H.\} and V. Kubarovsky and J. Kuhn and Kuhn, \{S. E.\} and Kuleshov, \{S. V.\} and J. Lachniet and Laget, \{J. M.\} and J. Langheinrich and D. Lawrence and K. Livingston and H. Lu and M. MacCormick and N. Markov and B. McKinnon and Mecking, \{B. A.\} and Mestayer, \{M. D.\} and Meyer, \{C. A.\} and T. Mibe and K. Mikhailov and M. Mirazita and R. Miskimen and V. Mokeev and K. Moriya and Morrow, \{S. A.\} and M. Moteabbed and E. Munevar and Mutchler, \{G. S.\} and P. Nadel-Turonski and R. Nasseripour and S. Niccolai and G. Niculescu and I. Niculescu and Niczyporuk, \{B. B.\} and Niroula, \{M. R.\} and Niyazov, \{R. A.\} and M. Nozar and M. Osipenko and Ostrovidov, \{A. I.\} and K. Park and E. Pasyuk and C. Paterson and J. Pierce and N. Pivnyuk and O. Pogorelko and S. Pozdniakov and Price, \{J. W.\} and Y. Prok and D. Protopopescu and Raue, \{B. A.\} and G. Ricco and M. Ripani and Ritchie, \{B. G.\} and F. Ronchetti and G. Rosner and P. Rossi and F. Sabati{\'e} and C. Salgado and Santoro, \{J. P.\} and V. Sapunenko and Schumacher, \{R. A.\} and Serov, \{V. S.\} and Sharabian, \{Y. G.\} and Shvedunov, \{N. V.\} and Smith, \{E. S.\} and Smith, \{L. C.\} and Sober, \{D. I.\} and A. Stavinsky and Stepanyan, \{S. S.\} and S. Stepanyan and Stokes, \{B. E.\} and P. Stoler and S. Strauch and M. Taiuti and Tedeschi, \{D. J.\} and U. Thoma and A. Tkabladze and S. Tkachenko and C. Tur and M. Ungaro and Vineyard, \{M. F.\} and Vlassov, \{A. V.\} and Watts, \{D. P.\} and Weinstein, \{L. B.\} and Weygand, \{D. P.\} and M. Williams and E. Wolin and Wood, \{M. H.\} and A. Yegneswaran and L. Zana and J. Zhang and B. Zhao and Z. Zhao",

year = "2010",

doi = "10.1140/epja/i2010-10918-x",

language = "English",

volume = "43",

pages = "261--267",

journal = "European Physical Journal A",

issn = "1434-6001",

publisher = "Springer",

number = "3",

}

Ilieva, Y, Berman, BL, Kudryavtsev, AE, Strakovsky, II, Tarasov, VE, Amarian, M, Ambrozewicz, P, Anghinolfi, M, Asryan, G, Avakian, H, Bagdasaryan, H, Baillie, N, Ball, JP, Baltzell, NA, Batourine, V, Battaglieri, M, Bedlinskiy, I, Bellis, M, Benmouna, N, Biselli, AS, Bouchigny, S, Boiarinov, S, Bradford, R, Branford, D, Briscoe, WJ, Brooks, WK, Bültmann, S, Burkert, VD, Butuceanu, C, Calarco, JR, Careccia, SL, Carman, DS, Chen, S, Cole, PL, Collins, P, Coltharp, P, Crabb, D, Crede, V, de Masi, R, de Sanctis, E, de Vita, R, Degtyarenko, PV, Deur, A, Dickson, R, Djalali, C, Dodge, GE, Donnelly, J, Doughty, D, Dugger, M, Dzyubak, OP, Egiyan, H, Egiyan, KS, Elouadrhiri, L, Eugenio, P, Fedotov, G, Feldman, G, Funsten, H, Garçon, M, Gavalian, G, Gilfoyle, GP, Giovanetti, KL, Girod, FX, Goetz, JT, Gonenc, A, Gothe, RW, Griffioen, KA, Guidal, M, Guler, N, Guo, L, Gyurjyan, V, Hafidi, K, Hakobyan, RS, Hersman, FW, Hicks, K, Hleiqawi, I, Holtrop, M, Hyde-Wright, CE, Ireland, DG, Ishkhanov, BS, Isupov, EL, Ito, MM, Jenkins, D, Jo, HS, Joo, K, Juengst, HG, Kalantarians, N, Kellie, JD, Khandaker, M, Kim, W, Klein, A, Klein, FJ, Kossov, M, Krahn, Z, Kramer, LH, Kubarovsky, V, Kuhn, J, Kuhn, SE, Kuleshov, SV, Lachniet, J, Laget, JM, Langheinrich, J, Lawrence, D, Livingston, K, Lu, H, MacCormick, M, Markov, N, McKinnon, B, Mecking, BA, Mestayer, MD, Meyer, CA, Mibe, T, Mikhailov, K, Mirazita, M, Miskimen, R, Mokeev, V, Moriya, K, Morrow, SA, Moteabbed, M, Munevar, E, Mutchler, GS, Nadel-Turonski, P, Nasseripour, R, Niccolai, S, Niculescu, G, Niculescu, I, Niczyporuk, BB, Niroula, MR, Niyazov, RA, Nozar, M, Osipenko, M, Ostrovidov, AI, Park, K, Pasyuk, E, Paterson, C, Pierce, J, Pivnyuk, N, Pogorelko, O, Pozdniakov, S, Price, JW, Prok, Y, Protopopescu, D, Raue, BA, Ricco, G, Ripani, M, Ritchie, BG, Ronchetti, F, Rosner, G, Rossi, P, Sabatié, F, Salgado, C, Santoro, JP, Sapunenko, V, Schumacher, RA, Serov, VS, Sharabian, YG, Shvedunov, NV, Smith, ES, Smith, LC, Sober, DI, Stavinsky, A, Stepanyan, SS, Stepanyan, S, Stokes, BE, Stoler, P, Strauch, S, Taiuti, M, Tedeschi, DJ, Thoma, U, Tkabladze, A, Tkachenko, S, Tur, C, Ungaro, M, Vineyard, MF, Vlassov, AV, Watts, DP, Weinstein, LB, Weygand, DP, Williams, M, Wolin, E, Wood, MH, Yegneswaran, A, Zana, L, Zhang, J, Zhao, B & Zhao, Z 2010, 'Evidence for a backward peak in the γd → π⁰d cross section near the η threshold', European Physical Journal A, vol. 43, no. 3, pp. 261-267. https://doi.org/10.1140/epja/i2010-10918-x

TY - JOUR

T1 - Evidence for a backward peak in the γd → π0d cross section near the η threshold

AU - Ilieva, Y.

AU - Berman, B. L.

AU - Kudryavtsev, A. E.

AU - Strakovsky, I. I.

AU - Tarasov, V. E.

AU - Amarian, M.

AU - Ambrozewicz, P.

AU - Anghinolfi, M.

AU - Asryan, G.

AU - Avakian, H.

AU - Bagdasaryan, H.

AU - Baillie, N.

AU - Ball, J. P.

AU - Baltzell, N. A.

AU - Batourine, V.

AU - Battaglieri, M.

AU - Bedlinskiy, I.

AU - Bellis, M.

AU - Benmouna, N.

AU - Biselli, A. S.

AU - Bouchigny, S.

AU - Boiarinov, S.

AU - Bradford, R.

AU - Branford, D.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Bültmann, S.

AU - Burkert, V. D.

AU - Butuceanu, C.

AU - Calarco, J. R.

AU - Careccia, S. L.

AU - Carman, D. S.

AU - Chen, S.

AU - Cole, P. L.

AU - Collins, P.

AU - Coltharp, P.

AU - Crabb, D.

AU - Crede, V.

AU - de Masi, R.

AU - de Sanctis, E.

AU - de Vita, R.

AU - Degtyarenko, P. V.

AU - Deur, A.

AU - Dickson, R.

AU - Djalali, C.

AU - Dodge, G. E.

AU - Donnelly, J.

AU - Doughty, D.

AU - Dugger, M.

AU - Dzyubak, O. P.

AU - Egiyan, H.

AU - Egiyan, K. S.

AU - Elouadrhiri, L.

AU - Eugenio, P.

AU - Fedotov, G.

AU - Feldman, G.

AU - Funsten, H.

AU - Garçon, M.

AU - Gavalian, G.

AU - Gilfoyle, G. P.

AU - Giovanetti, K. L.

AU - Girod, F. X.

AU - Goetz, J. T.

AU - Gonenc, A.

AU - Gothe, R. W.

AU - Griffioen, K. A.

AU - Guidal, M.

AU - Guler, N.

AU - Guo, L.

AU - Gyurjyan, V.

AU - Hafidi, K.

AU - Hakobyan, R. S.

AU - Hersman, F. W.

AU - Hicks, K.

AU - Hleiqawi, I.

AU - Holtrop, M.

AU - Hyde-Wright, C. E.

AU - Ireland, D. G.

AU - Ishkhanov, B. S.

AU - Isupov, E. L.

AU - Ito, M. M.

AU - Jenkins, D.

AU - Jo, H. S.

AU - Joo, K.

AU - Juengst, H. G.

AU - Kalantarians, N.

AU - Kellie, J. D.

AU - Khandaker, M.

AU - Kim, W.

AU - Klein, A.

AU - Klein, F. J.

AU - Kossov, M.

AU - Krahn, Z.

AU - Kramer, L. H.

AU - Kubarovsky, V.

AU - Kuhn, J.

AU - Kuhn, S. E.

AU - Kuleshov, S. V.

AU - Lachniet, J.

AU - Laget, J. M.

AU - Langheinrich, J.

AU - Lawrence, D.

AU - Livingston, K.

AU - Lu, H.

AU - MacCormick, M.

AU - Markov, N.

AU - McKinnon, B.

AU - Mecking, B. A.

AU - Mestayer, M. D.

AU - Meyer, C. A.

AU - Mibe, T.

AU - Mikhailov, K.

AU - Mirazita, M.

AU - Miskimen, R.

AU - Mokeev, V.

AU - Moriya, K.

AU - Morrow, S. A.

AU - Moteabbed, M.

AU - Munevar, E.

AU - Mutchler, G. S.

AU - Nadel-Turonski, P.

AU - Nasseripour, R.

AU - Niccolai, S.

AU - Niculescu, G.

AU - Niculescu, I.

AU - Niczyporuk, B. B.

AU - Niroula, M. R.

AU - Niyazov, R. A.

AU - Nozar, M.

AU - Osipenko, M.

AU - Ostrovidov, A. I.

AU - Park, K.

AU - Pasyuk, E.

AU - Paterson, C.

AU - Pierce, J.

AU - Pivnyuk, N.

AU - Pogorelko, O.

AU - Pozdniakov, S.

AU - Price, J. W.

AU - Prok, Y.

AU - Protopopescu, D.

AU - Raue, B. A.

AU - Ricco, G.

AU - Ripani, M.

AU - Ritchie, B. G.

AU - Ronchetti, F.

AU - Rosner, G.

AU - Rossi, P.

AU - Sabatié, F.

AU - Salgado, C.

AU - Santoro, J. P.

AU - Sapunenko, V.

AU - Schumacher, R. A.

AU - Serov, V. S.

AU - Sharabian, Y. G.

AU - Shvedunov, N. V.

AU - Smith, E. S.

AU - Smith, L. C.

AU - Sober, D. I.

AU - Stavinsky, A.

AU - Stepanyan, S. S.

AU - Stepanyan, S.

AU - Stokes, B. E.

AU - Stoler, P.

AU - Strauch, S.

AU - Taiuti, M.

AU - Tedeschi, D. J.

AU - Thoma, U.

AU - Tkabladze, A.

AU - Tkachenko, S.

AU - Tur, C.

AU - Ungaro, M.

AU - Vineyard, M. F.

AU - Vlassov, A. V.

AU - Watts, D. P.

AU - Weinstein, L. B.

AU - Weygand, D. P.

AU - Williams, M.

AU - Wolin, E.

AU - Wood, M. H.

AU - Yegneswaran, A.

AU - Zana, L.

AU - Zhang, J.

AU - Zhao, B.

AU - Zhao, Z.

PY - 2010

Y1 - 2010

N2 - High-quality cross sections for the reaction γd → π0d have been measured using the CLAS at Jefferson Lab over a wide energy range near and above the η-meson photoproduction threshold. At backward c. m. angles for the outgoing pions, we observe a resonance-like structure near Eγ = 700 MeV. Our model analysis shows that it can be explained by η excitation in the intermediate state. The effect is the result of the contribution of the N(1535)S11-resonance to the amplitudes of the subprocesses occurring between the two nucleons and of a two-step process in which the excitation of an intermediate η-meson dominates.

AB - High-quality cross sections for the reaction γd → π0d have been measured using the CLAS at Jefferson Lab over a wide energy range near and above the η-meson photoproduction threshold. At backward c. m. angles for the outgoing pions, we observe a resonance-like structure near Eγ = 700 MeV. Our model analysis shows that it can be explained by η excitation in the intermediate state. The effect is the result of the contribution of the N(1535)S11-resonance to the amplitudes of the subprocesses occurring between the two nucleons and of a two-step process in which the excitation of an intermediate η-meson dominates.

UR - https://www.scopus.com/pages/publications/77951767776

U2 - 10.1140/epja/i2010-10918-x

DO - 10.1140/epja/i2010-10918-x

M3 - Article

AN - SCOPUS:77951767776

SN - 1434-6001

VL - 43

SP - 261

EP - 267

JO - European Physical Journal A

JF - European Physical Journal A

IS - 3

ER -

Evidence for a backward peak in the γd → π⁰d cross section near the η threshold

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