Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead

A2 Collaboration at MAMI; K. Livingston; S. Lutterer; I. J.D. MacGregor; R. Macrae; D. M. Manley; P. P. Martel; J. C. McGeorge; D.G. Middleton; R. Miskimen; E. Mornacchi; C. Mullen; A. Mushkarenkov; A. Neganov; A. Neiser; M. Oberle; M. Ostrick; P. B. Otte; D. Paudyal; P. Pedroni

doi:10.1016/j.physletb.2020.135243

Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead

A2 Collaboration at MAMI, K. Livingston, S. Lutterer, I. J.D. MacGregor, R. Macrae, D. M. Manley, P. P. Martel, J. C. McGeorge, D.G. Middleton, R. Miskimen, E. Mornacchi, C. Mullen, A. Mushkarenkov, A. Neganov, A. Neiser, M. Oberle, M. Ostrick, P. B. Otte, D. Paudyal, P. Pedroni

Physics

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

Abstract

The beam-helicity asymmetry was measured, for the first time, in photoproduction of $\pi^{0}\eta$ pairs on carbon, aluminum, and lead, with the A2 experimental setup at MAMI. The results are compared to an earlier measurement on a free proton and to the corresponding theoretical calculations. The Mainz model is used to predict the beam-helicity asymmetry for the nuclear targets. The present results indicate that the photoproduction mechanism for $\pi^{0}\eta$ pairs on nuclei is similar to photoproduction on a free nucleon. This process is dominated by the $D_{33}$ partial wave with the $\eta\Delta(1232)$ intermediate state.

Original language	English
Article number	135243
Number of pages	8
Journal	Physics Letters B
Volume	802
Early online date	23 Jan 2020
DOIs	https://doi.org/10.1016/j.physletb.2020.135243
Publication status	Published - 10 Mar 2020

Bibliographical note

© 2020 The Author(s). Published by Elsevier B.V
8 pages, 2 figures. arXiv admin note: text overlap with arXiv:1803.00727

Keywords

nucl-ex

Access to Document

10.1016/j.physletb.2020.135243Licence: CC BY

1-s2.0-S0370269320300472-main
© 2020 The Author(s). Published by Elsevier B.V
Final published version, 545 KBLicence: CC BY

Cite this

A2 Collaboration at MAMI, Livingston, K., Lutterer, S., MacGregor, I. J. D., Macrae, R., Manley, D. M., Martel, P. P., McGeorge, J. C., Middleton, D. G., Miskimen, R., Mornacchi, E., Mullen, C., Mushkarenkov, A., Neganov, A., Neiser, A., Oberle, M., Ostrick, M., Otte, P. B., Paudyal, D., & Pedroni, P. (2020). Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead. Physics Letters B, 802, Article 135243. https://doi.org/10.1016/j.physletb.2020.135243

@article{f1b853f56aad4a079a351832983cd0bc,

title = "Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead",

abstract = " The beam-helicity asymmetry was measured, for the first time, in photoproduction of $\pi^{0}\eta$ pairs on carbon, aluminum, and lead, with the A2 experimental setup at MAMI. The results are compared to an earlier measurement on a free proton and to the corresponding theoretical calculations. The Mainz model is used to predict the beam-helicity asymmetry for the nuclear targets. The present results indicate that the photoproduction mechanism for $\pi^{0}\eta$ pairs on nuclei is similar to photoproduction on a free nucleon. This process is dominated by the $D_{33}$ partial wave with the $\eta\Delta(1232)$ intermediate state. ",

keywords = "nucl-ex",

author = "{A2 Collaboration at MAMI} and V. Sokhoyan and S. Prakhov and A. Fix and S. Abt and P. Achenbach and P. Adlarson and F. Afzal and P. Aguar-Bartolom{\'e} and Z. Ahmed and K. Altangerel 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 C. Collicott and S. Costanza and A. Denig and M. Dieterle and Downie, {E. J.} and P. Drexler and Bondy, {M. I. Ferretti} and Fil'kov, {L. V.} and S. Gardner and S. Garni and Glazier, {D. I.} and I. Gorodnov and W. Gradl and M. G{\"u}nther and Gurevich, {G. M.} and L. Heijkenskj{\"o}ld and D. Hornidge and Huber, {G. M.} and A. K{\"a}ser and Kashevarov, {V. L.} and S. Kay and I. Keshelashvili and R. Kondratiev and M. Korolija and B. Krusche and A. Lazarev and K. Livingston and S. Lutterer and MacGregor, {I. J.D.} and R. Macrae and Manley, {D. M.} and Martel, {P. P.} and McGeorge, {J. C.} and D.G. Middleton and R. Miskimen and E. Mornacchi and C. Mullen and A. Mushkarenkov and A. Neganov and A. Neiser and M. Oberle and M. Ostrick and Otte, {P. B.} and D. Paudyal and P. Pedroni and Watts, {D. P.} and D. Werthm{\"u}ller and N. Zachariou",

note = "{\textcopyright} 2020 The Author(s). Published by Elsevier B.V 8 pages, 2 figures. arXiv admin note: text overlap with arXiv:1803.00727",

year = "2020",

month = mar,

day = "10",

doi = "10.1016/j.physletb.2020.135243",

language = "English",

volume = "802",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

}

A2 Collaboration at MAMI, Livingston, K, Lutterer, S, MacGregor, IJD, Macrae, R, Manley, DM, Martel, PP, McGeorge, JC, Middleton, DG, Miskimen, R, Mornacchi, E, Mullen, C, Mushkarenkov, A, Neganov, A, Neiser, A, Oberle, M, Ostrick, M, Otte, PB, Paudyal, D & Pedroni, P 2020, 'Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead', Physics Letters B, vol. 802, 135243. https://doi.org/10.1016/j.physletb.2020.135243

TY - JOUR

T1 - Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead

AU - A2 Collaboration at MAMI

AU - Sokhoyan, V.

AU - Prakhov, S.

AU - Fix, A.

AU - Abt, S.

AU - Achenbach, P.

AU - Adlarson, P.

AU - Afzal, F.

AU - Aguar-Bartolomé, P.

AU - Ahmed, Z.

AU - Altangerel, K.

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 - Collicott, C.

AU - Costanza, S.

AU - Denig, A.

AU - Dieterle, M.

AU - Downie, E. J.

AU - Drexler, P.

AU - Bondy, M. I. Ferretti

AU - Fil'kov, L. V.

AU - Gardner, S.

AU - Garni, S.

AU - Glazier, D. I.

AU - Gorodnov, I.

AU - Gradl, W.

AU - Günther, M.

AU - Gurevich, G. M.

AU - Heijkenskjöld, L.

AU - Hornidge, D.

AU - Huber, G. M.

AU - Käser, A.

AU - Kashevarov, V. L.

AU - Kay, S.

AU - Keshelashvili, I.

AU - Kondratiev, R.

AU - Korolija, M.

AU - Krusche, B.

AU - Lazarev, A.

AU - Livingston, K.

AU - Lutterer, S.

AU - MacGregor, I. J.D.

AU - Macrae, R.

AU - Manley, D. M.

AU - Martel, P. P.

AU - McGeorge, J. C.

AU - Middleton, D.G.

AU - Miskimen, R.

AU - Mornacchi, E.

AU - Mullen, C.

AU - Mushkarenkov, A.

AU - Neganov, A.

AU - Neiser, A.

AU - Oberle, M.

AU - Ostrick, M.

AU - Otte, P. B.

AU - Paudyal, D.

AU - Pedroni, P.

AU - Watts, D. P.

AU - Werthmüller, D.

AU - Zachariou, N.

PY - 2020/3/10

Y1 - 2020/3/10

N2 - The beam-helicity asymmetry was measured, for the first time, in photoproduction of $\pi^{0}\eta$ pairs on carbon, aluminum, and lead, with the A2 experimental setup at MAMI. The results are compared to an earlier measurement on a free proton and to the corresponding theoretical calculations. The Mainz model is used to predict the beam-helicity asymmetry for the nuclear targets. The present results indicate that the photoproduction mechanism for $\pi^{0}\eta$ pairs on nuclei is similar to photoproduction on a free nucleon. This process is dominated by the $D_{33}$ partial wave with the $\eta\Delta(1232)$ intermediate state.

AB - The beam-helicity asymmetry was measured, for the first time, in photoproduction of $\pi^{0}\eta$ pairs on carbon, aluminum, and lead, with the A2 experimental setup at MAMI. The results are compared to an earlier measurement on a free proton and to the corresponding theoretical calculations. The Mainz model is used to predict the beam-helicity asymmetry for the nuclear targets. The present results indicate that the photoproduction mechanism for $\pi^{0}\eta$ pairs on nuclei is similar to photoproduction on a free nucleon. This process is dominated by the $D_{33}$ partial wave with the $\eta\Delta(1232)$ intermediate state.

KW - nucl-ex

U2 - 10.1016/j.physletb.2020.135243

DO - 10.1016/j.physletb.2020.135243

M3 - Article

SN - 0370-2693

VL - 802

JO - Physics Letters B

JF - Physics Letters B

M1 - 135243

ER -