Photon asymmetry measurements of γ→ p→ π0p for Eγ= 320-650 MeV

S. Gardner; D. Howdle; M. H. Sikora; Y. Wunderlich; S. Abt; P. Achenbach; F. Afzal; P. Aguar-Bartolome; Z. Ahmed; J. R.M. Annand; H. J. Arends; K. Bantawa; M. Bashkanov; R. Beck; M. Biroth; N. S. Borisov; A. Braghieri; W. J. Briscoe; S. Cherepnya; F. Cividini; S. Costanza; C. Collicott; B. T. Demissie; A. Denig; M. Dieterle; E. J. Downie; P. Drexler; M. I. Ferretti-Bondy; L. V. Filkov; D. I. Glazier; S. Garni; W. Gradl; M. Günther; G. M. Gurevich; P. Hall Barrientos; D. Hamilton; E. Heid; D. Hornidge; G. M. Huber; O. Jahn; T. C. Jude; A. Käser; S. Kay; V. L. Kashevarov; I. Keshelashvili; R. Kondratiev; M. Korolija; B. Krusche; J. M. Linturi; V. Lisin; K. Livingston; S. Lutterer; I. J.D. MacGregor; R. Macrae; J. Mancell; D. M. Manley; P. P. Martel; J. C. McGeorge; E. F. McNicoll; D. G. Middleton; R. Miskimen; C. Mullen; A. Mushkarenkov; A. B. Neganov; A. Neiser; A. Nikolaev; M. Oberle; M. Ostrick; R. O. Owens; P. B. Otte; B. Oussena; D. Paudyal; P. Pedroni; A. Polonski; S. Prakhov; A. Rajabi; G. Rosner; T. Rostomyan; A. Sarty; S. Schumann; V. Sokhoyan; K. Spieker; O. Steffen; C. Sfienti; I. I. Strakovsky; B. Strandberg; Th Strub; I. Supek; C. M. Tarbert; A. Thiel; M. Thiel; M. Unverzagt; Yu A. Usov; D. P. Watts; D. Werthmüller; J. Wettig; M. Wolfes; L. Witthauer; L. Zana

doi:10.1140/epja/i2016-16333-5

Photon asymmetry measurements of γ→ p→ π⁰p for E_γ= 320-650 MeV

S. Gardner^*, D. Howdle, M. H. Sikora, Y. Wunderlich, S. Abt, P. Achenbach, F. Afzal, P. Aguar-Bartolome, Z. Ahmed, J. R.M. Annand, H. J. Arends, K. Bantawa, M. Bashkanov, R. Beck, M. Biroth, N. S. Borisov, A. Braghieri, W. J. Briscoe, S. Cherepnya, F. CividiniS. Costanza, C. Collicott, B. T. Demissie, A. Denig, M. Dieterle, E. J. Downie, P. Drexler, M. I. Ferretti-Bondy, L. V. Filkov, D. I. Glazier, S. Garni, W. Gradl, M. Günther, G. M. Gurevich, P. Hall Barrientos, D. Hamilton, E. Heid, D. Hornidge, G. M. Huber, O. Jahn, T. C. Jude, A. Käser, S. Kay, V. L. Kashevarov, I. Keshelashvili, R. Kondratiev, M. Korolija, B. Krusche, J. M. Linturi, V. Lisin, K. Livingston, S. Lutterer, I. J.D. MacGregor, R. Macrae, J. Mancell, D. M. Manley, P. P. Martel, J. C. McGeorge, E. F. McNicoll, D. G. Middleton, R. Miskimen, C. Mullen, A. Mushkarenkov, A. B. Neganov, A. Neiser, A. Nikolaev, M. Oberle, M. Ostrick, R. O. Owens, P. B. Otte, B. Oussena, D. Paudyal, P. Pedroni, A. Polonski, S. Prakhov, A. Rajabi, G. Rosner, T. Rostomyan, A. Sarty, S. Schumann, V. Sokhoyan, K. Spieker, O. Steffen, C. Sfienti, I. I. Strakovsky, B. Strandberg, Th Strub, I. Supek, C. M. Tarbert, A. Thiel, M. Thiel, M. Unverzagt, Yu A. Usov, D. P. Watts, D. Werthmüller, J. Wettig, M. Wolfes, L. Witthauer, L. Zana

^*Corresponding author for this work

Physics

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

Abstract

High-statistics measurements of the photon asymmetry Σ for the γ→ p→ π⁰p reaction have been made in the center-of-mass energy range W= 1214 - 1450 MeV. The data were measured with the MAMI A2 real photon beam and Crystal Ball/TAPS detector systems in Mainz, Germany. The results significantly improve the existing world data and are shown to be in good agreement with previous measurements, and with the MAID, SAID, and Bonn-Gatchina predictions. We have also combined the photon asymmetry results with recent cross-section measurements from Mainz to calculate the profile functions, Σˇ (= σ₀Σ) , and perform a moment analysis. Comparison with calculations from the Bonn-Gatchina model shows that the precision of the data is good enough to further constrain the higher partial waves, and there is an indication of interference between the very small F-waves and the N(1520) 3 / 2 ^- and N(1535) 1 / 2 ^- resonances.

Original language	English
Article number	333
Journal	European Physical Journal A
Volume	52
Issue number	11
DOIs	https://doi.org/10.1140/epja/i2016-16333-5
Publication status	Published - 17 Nov 2016

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Gardner, S., Howdle, D., Sikora, M. H., Wunderlich, Y., Abt, S., Achenbach, P., Afzal, F., Aguar-Bartolome, P., Ahmed, Z., Annand, J. R. M., Arends, H. J., Bantawa, K., Bashkanov, M., Beck, R., Biroth, M., Borisov, N. S., Braghieri, A., Briscoe, W. J., Cherepnya, S., ... Zana, L. (2016). Photon asymmetry measurements of γ→ p→ π⁰p for E_γ= 320-650 MeV. European Physical Journal A, 52(11), Article 333. https://doi.org/10.1140/epja/i2016-16333-5

@article{04430475fc3a41b298a7aa3fa23ed2ae,

title = "Photon asymmetry measurements of γ→ p→ π0p for Eγ= 320-650 MeV",

abstract = "High-statistics measurements of the photon asymmetry Σ for the γ→ p→ π0p reaction have been made in the center-of-mass energy range W= 1214 - 1450 MeV. The data were measured with the MAMI A2 real photon beam and Crystal Ball/TAPS detector systems in Mainz, Germany. The results significantly improve the existing world data and are shown to be in good agreement with previous measurements, and with the MAID, SAID, and Bonn-Gatchina predictions. We have also combined the photon asymmetry results with recent cross-section measurements from Mainz to calculate the profile functions, Σˇ (= σ0Σ) , and perform a moment analysis. Comparison with calculations from the Bonn-Gatchina model shows that the precision of the data is good enough to further constrain the higher partial waves, and there is an indication of interference between the very small F-waves and the N(1520) 3 / 2 - and N(1535) 1 / 2 - resonances.",

author = "S. Gardner and D. Howdle and Sikora, {M. H.} and Y. Wunderlich and S. Abt and P. Achenbach and F. Afzal and P. Aguar-Bartolome and Z. Ahmed and Annand, {J. R.M.} and Arends, {H. J.} and K. Bantawa and M. Bashkanov and R. Beck and M. Biroth and Borisov, {N. S.} and A. Braghieri and Briscoe, {W. J.} and S. Cherepnya and F. Cividini and S. Costanza and C. Collicott and Demissie, {B. T.} and A. Denig and M. Dieterle and Downie, {E. J.} and P. Drexler and Ferretti-Bondy, {M. I.} and Filkov, {L. V.} and Glazier, {D. I.} and S. Garni and W. Gradl and M. G{\"u}nther and Gurevich, {G. M.} and {Hall Barrientos}, P. and D. Hamilton and E. Heid and D. Hornidge and Huber, {G. M.} and O. Jahn and Jude, {T. C.} and A. K{\"a}ser and S. Kay and Kashevarov, {V. L.} and I. Keshelashvili and R. Kondratiev and M. Korolija and B. Krusche and Linturi, {J. M.} and V. Lisin and K. Livingston and S. Lutterer and MacGregor, {I. J.D.} and R. Macrae and J. Mancell and Manley, {D. M.} and Martel, {P. P.} and McGeorge, {J. C.} and McNicoll, {E. F.} and Middleton, {D. G.} and R. Miskimen and C. Mullen and A. Mushkarenkov and Neganov, {A. B.} and A. Neiser and A. Nikolaev and M. Oberle and M. Ostrick and Owens, {R. O.} and Otte, {P. B.} and B. Oussena and D. Paudyal and P. Pedroni and A. Polonski and S. Prakhov and A. Rajabi and G. Rosner and T. Rostomyan and A. Sarty and S. Schumann and V. Sokhoyan and K. Spieker and O. Steffen and C. Sfienti and Strakovsky, {I. I.} and B. Strandberg and Th Strub and I. Supek and Tarbert, {C. M.} and A. Thiel and M. Thiel and M. Unverzagt and Usov, {Yu A.} and Watts, {D. P.} and D. Werthm{\"u}ller and J. Wettig and M. Wolfes and L. Witthauer and L. Zana",

note = "{\textcopyright} The Author(s) 2016",

year = "2016",

month = nov,

day = "17",

doi = "10.1140/epja/i2016-16333-5",

language = "English",

volume = "52",

journal = "European Physical Journal A",

issn = "1434-6001",

publisher = "Springer",

number = "11",

}

Gardner, S, Howdle, D, Sikora, MH, Wunderlich, Y, Abt, S, Achenbach, P, Afzal, F, Aguar-Bartolome, P, Ahmed, Z, Annand, JRM, Arends, HJ, Bantawa, K, Bashkanov, M, Beck, R, Biroth, M, Borisov, NS, Braghieri, A, Briscoe, WJ, Cherepnya, S, Cividini, F, Costanza, S, Collicott, C, Demissie, BT, Denig, A, Dieterle, M, Downie, EJ, Drexler, P, Ferretti-Bondy, MI, Filkov, LV, Glazier, DI, Garni, S, Gradl, W, Günther, M, Gurevich, GM, Hall Barrientos, P, Hamilton, D, Heid, E, Hornidge, D, Huber, GM, Jahn, O, Jude, TC, Käser, A, Kay, S, Kashevarov, VL, Keshelashvili, I, Kondratiev, R, Korolija, M, Krusche, B, Linturi, JM, Lisin, V, Livingston, K, Lutterer, S, MacGregor, IJD, Macrae, R, Mancell, J, Manley, DM, Martel, PP, McGeorge, JC, McNicoll, EF, Middleton, DG, Miskimen, R, Mullen, C, Mushkarenkov, A, Neganov, AB, Neiser, A, Nikolaev, A, Oberle, M, Ostrick, M, Owens, RO, Otte, PB, Oussena, B, Paudyal, D, Pedroni, P, Polonski, A, Prakhov, S, Rajabi, A, Rosner, G, Rostomyan, T, Sarty, A, Schumann, S, Sokhoyan, V, Spieker, K, Steffen, O, Sfienti, C, Strakovsky, II, Strandberg, B, Strub, T, Supek, I, Tarbert, CM, Thiel, A, Thiel, M, Unverzagt, M, Usov, YA, Watts, DP , Werthmüller, D, Wettig, J, Wolfes, M, Witthauer, L & Zana, L 2016, 'Photon asymmetry measurements of γ→ p→ π⁰p for E_γ= 320-650 MeV', European Physical Journal A, vol. 52, no. 11, 333. https://doi.org/10.1140/epja/i2016-16333-5

TY - JOUR

T1 - Photon asymmetry measurements of γ→ p→ π0p for Eγ= 320-650 MeV

AU - Gardner, S.

AU - Howdle, D.

AU - Sikora, M. H.

AU - Wunderlich, Y.

AU - Abt, S.

AU - Achenbach, P.

AU - Afzal, F.

AU - Aguar-Bartolome, P.

AU - Ahmed, Z.

AU - Annand, J. R.M.

AU - Arends, H. J.

AU - Bantawa, K.

AU - Bashkanov, M.

AU - Beck, R.

AU - Biroth, M.

AU - Borisov, N. S.

AU - Braghieri, A.

AU - Briscoe, W. J.

AU - Cherepnya, S.

AU - Cividini, F.

AU - Costanza, S.

AU - Collicott, C.

AU - Demissie, B. T.

AU - Denig, A.

AU - Dieterle, M.

AU - Downie, E. J.

AU - Drexler, P.

AU - Ferretti-Bondy, M. I.

AU - Filkov, L. V.

AU - Glazier, D. I.

AU - Garni, S.

AU - Gradl, W.

AU - Günther, M.

AU - Gurevich, G. M.

AU - Hall Barrientos, P.

AU - Hamilton, D.

AU - Heid, E.

AU - Hornidge, D.

AU - Huber, G. M.

AU - Jahn, O.

AU - Jude, T. C.

AU - Käser, A.

AU - Kay, S.

AU - Kashevarov, V. L.

AU - Keshelashvili, I.

AU - Kondratiev, R.

AU - Korolija, M.

AU - Krusche, B.

AU - Linturi, J. M.

AU - Lisin, V.

AU - Livingston, K.

AU - Lutterer, S.

AU - MacGregor, I. J.D.

AU - Macrae, R.

AU - Mancell, J.

AU - Manley, D. M.

AU - Martel, P. P.

AU - McGeorge, J. C.

AU - McNicoll, E. F.

AU - Middleton, D. G.

AU - Miskimen, R.

AU - Mullen, C.

AU - Mushkarenkov, A.

AU - Neganov, A. B.

AU - Neiser, A.

AU - Nikolaev, A.

AU - Oberle, M.

AU - Ostrick, M.

AU - Owens, R. O.

AU - Otte, P. B.

AU - Oussena, B.

AU - Paudyal, D.

AU - Pedroni, P.

AU - Polonski, A.

AU - Prakhov, S.

AU - Rajabi, A.

AU - Rosner, G.

AU - Rostomyan, T.

AU - Sarty, A.

AU - Schumann, S.

AU - Sokhoyan, V.

AU - Spieker, K.

AU - Steffen, O.

AU - Sfienti, C.

AU - Strakovsky, I. I.

AU - Strandberg, B.

AU - Strub, Th

AU - Supek, I.

AU - Tarbert, C. M.

AU - Thiel, A.

AU - Thiel, M.

AU - Unverzagt, M.

AU - Usov, Yu A.

AU - Watts, D. P.

AU - Werthmüller, D.

AU - Wettig, J.

AU - Wolfes, M.

AU - Witthauer, L.

AU - Zana, L.

PY - 2016/11/17

Y1 - 2016/11/17

N2 - High-statistics measurements of the photon asymmetry Σ for the γ→ p→ π0p reaction have been made in the center-of-mass energy range W= 1214 - 1450 MeV. The data were measured with the MAMI A2 real photon beam and Crystal Ball/TAPS detector systems in Mainz, Germany. The results significantly improve the existing world data and are shown to be in good agreement with previous measurements, and with the MAID, SAID, and Bonn-Gatchina predictions. We have also combined the photon asymmetry results with recent cross-section measurements from Mainz to calculate the profile functions, Σˇ (= σ0Σ) , and perform a moment analysis. Comparison with calculations from the Bonn-Gatchina model shows that the precision of the data is good enough to further constrain the higher partial waves, and there is an indication of interference between the very small F-waves and the N(1520) 3 / 2 - and N(1535) 1 / 2 - resonances.

AB - High-statistics measurements of the photon asymmetry Σ for the γ→ p→ π0p reaction have been made in the center-of-mass energy range W= 1214 - 1450 MeV. The data were measured with the MAMI A2 real photon beam and Crystal Ball/TAPS detector systems in Mainz, Germany. The results significantly improve the existing world data and are shown to be in good agreement with previous measurements, and with the MAID, SAID, and Bonn-Gatchina predictions. We have also combined the photon asymmetry results with recent cross-section measurements from Mainz to calculate the profile functions, Σˇ (= σ0Σ) , and perform a moment analysis. Comparison with calculations from the Bonn-Gatchina model shows that the precision of the data is good enough to further constrain the higher partial waves, and there is an indication of interference between the very small F-waves and the N(1520) 3 / 2 - and N(1535) 1 / 2 - resonances.

UR - http://www.scopus.com/inward/record.url?scp=84995743411&partnerID=8YFLogxK

U2 - 10.1140/epja/i2016-16333-5

DO - 10.1140/epja/i2016-16333-5

M3 - Article

AN - SCOPUS:84995743411

SN - 1434-6001

VL - 52

JO - European Physical Journal A

JF - European Physical Journal A

IS - 11

M1 - 333

ER -