@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",

}