Measurement of the decay η'→π0π0η at MAMI

doi:10.1103/PhysRevD.98.012001

Title: Measurement of the decay $η^{'} \to π^{0} π^{0} η$ at MAMI

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Abstract

An experimental study of the η' → π ⁰π ⁰η → 6$$\gamma$$ decay has been conducted with the best up- to-date statistical accuracy, by measuring η' mesons produced in the $$\gamma$$p → η'p reaction with the A2 tagged-photon facility at the Mainz Microtron, MAMI. The results obtained for the standard parametrization of the η' → π ⁰π ⁰η matrix element are consistent with the most recent results for η' → ππη decays, but have smaller uncertainties. Finally, the available statistics and experimental resolution allowed, for the first time, an observation of a structure below the π ⁺π ^- mass threshold, the magnitude and sign of which, checked within the framework of the nonrelativistic effective-field theory, demonstrated good agreement with the cusp that was predicted based on the ππ scattering length combination, a ₀ - a ₂, extracted from K → 3π decays.

Authors:: Adlarson, P.; Afzal, F.; Ahmed, Z.; Akondi, C. S.; Annand, J. R. M.; Arends, H. J.; Beck, R.; Borisov, N.; Braghieri, A.; Briscoe, W. J.; Cividini, F.; Collicott, C.; Costanza, S.; Denig, A.; Downie, E. J.; Dieterle, M.; Ferretti Bondy, M. I.; Gardner, S.; Garni, S.; Glazier, D. I. more »« less

Publication Date:: 2018-07-03

Research Org.:: Kent State Univ., Kent, OH (United States); George Washington Univ., Washington, DC (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

Contributing Org.:: A2 Collaboration at MAMI

OSTI Identifier:: 1458793

Alternate Identifier(s):: OSTI ID: 1460973; OSTI ID: 1464051

Grant/Contract Number:: SC0014323; FG02-99-ER41110; FG02-88ER40415; FG02-01-ER41194; SC0016583; FG02-99ER41110; FG02-01ER41194

Resource Type:: Published Article

Journal Name:: Physical Review D

Additional Journal Information:: Journal Volume: 98; Journal Issue: 1; Journal ID: ISSN 2470-0010

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Meson decays; effective field theory; hadron-hadron interactions; hadronic decays; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

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                    Adlarson, P., Afzal, F., Ahmed, Z., Akondi, C. S., Annand, J. R.  M., Arends, H. J., Beck, R., Borisov, N., Braghieri, A., Briscoe, W. J., Cividini, F., Collicott, C., Costanza, S., Denig, A., Downie, E. J., Dieterle, M., Ferretti Bondy, M. I., Gardner, S., Garni, S., Glazier, D. I., Glowa, D., Gradl, W., Gurevich, G., Hamilton, D. J., Hornidge, D., Huber, G. M., Käser, A., Kashevarov, V. L., Kay, S., Keshelashvili, I., Kondratiev, R., Korolija, M., Krusche, B., Lazarev, A., Linturi, J., Livingston, K., MacGregor, I. J.  D., Manley, D. M., Martel, P. P., McGeorge, J. C., Middleton, D. G., Miskimen, R., Mushkarenkov, A., Neganov, A., Neiser, A., Oberle, M., Ostrick, M., Ott, P., Otte, P. B., Oussena, B., Paudyal, D., Pedroni, P., Polonski, A., Prakhov, S., Rajabi, A., Ron, G., Rostomyan, T., Sarty, A., Sfienti, C., Sokhoyan, V., Spieker, K., Steffen, O., Strakovsky, I. I., Strub, T., Supek, I., Thiel, A., Thiel, M., Tiator, L., Thomas, A., Unverzagt, M., Usov, Y. A., Wagner, S., Watts, D. P., Werthmüller, D., Wettig, J., Witthauer, L., Wolfes, M., Workman, R. L., and Zana, L. A. Measurement of the decay η'→π0π0η at MAMI.  United States: N. p., 2018. 
        Web.  doi:10.1103/PhysRevD.98.012001.

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                    Adlarson, P., Afzal, F., Ahmed, Z., Akondi, C. S., Annand, J. R.  M., Arends, H. J., Beck, R., Borisov, N., Braghieri, A., Briscoe, W. J., Cividini, F., Collicott, C., Costanza, S., Denig, A., Downie, E. J., Dieterle, M., Ferretti Bondy, M. I., Gardner, S., Garni, S., Glazier, D. I., Glowa, D., Gradl, W., Gurevich, G., Hamilton, D. J., Hornidge, D., Huber, G. M., Käser, A., Kashevarov, V. L., Kay, S., Keshelashvili, I., Kondratiev, R., Korolija, M., Krusche, B., Lazarev, A., Linturi, J., Livingston, K., MacGregor, I. J.  D., Manley, D. M., Martel, P. P., McGeorge, J. C., Middleton, D. G., Miskimen, R., Mushkarenkov, A., Neganov, A., Neiser, A., Oberle, M., Ostrick, M., Ott, P., Otte, P. B., Oussena, B., Paudyal, D., Pedroni, P., Polonski, A., Prakhov, S., Rajabi, A., Ron, G., Rostomyan, T., Sarty, A., Sfienti, C., Sokhoyan, V., Spieker, K., Steffen, O., Strakovsky, I. I., Strub, T., Supek, I., Thiel, A., Thiel, M., Tiator, L., Thomas, A., Unverzagt, M., Usov, Y. A., Wagner, S., Watts, D. P., Werthmüller, D., Wettig, J., Witthauer, L., Wolfes, M., Workman, R. L., & Zana, L. A. Measurement of the decay η'→π0π0η at MAMI.  United States.  doi:10.1103/PhysRevD.98.012001.

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                    Adlarson, P., Afzal, F., Ahmed, Z., Akondi, C. S., Annand, J. R.  M., Arends, H. J., Beck, R., Borisov, N., Braghieri, A., Briscoe, W. J., Cividini, F., Collicott, C., Costanza, S., Denig, A., Downie, E. J., Dieterle, M., Ferretti Bondy, M. I., Gardner, S., Garni, S., Glazier, D. I., Glowa, D., Gradl, W., Gurevich, G., Hamilton, D. J., Hornidge, D., Huber, G. M., Käser, A., Kashevarov, V. L., Kay, S., Keshelashvili, I., Kondratiev, R., Korolija, M., Krusche, B., Lazarev, A., Linturi, J., Livingston, K., MacGregor, I. J.  D., Manley, D. M., Martel, P. P., McGeorge, J. C., Middleton, D. G., Miskimen, R., Mushkarenkov, A., Neganov, A., Neiser, A., Oberle, M., Ostrick, M., Ott, P., Otte, P. B., Oussena, B., Paudyal, D., Pedroni, P., Polonski, A., Prakhov, S., Rajabi, A., Ron, G., Rostomyan, T., Sarty, A., Sfienti, C., Sokhoyan, V., Spieker, K., Steffen, O., Strakovsky, I. I., Strub, T., Supek, I., Thiel, A., Thiel, M., Tiator, L., Thomas, A., Unverzagt, M., Usov, Y. A., Wagner, S., Watts, D. P., Werthmüller, D., Wettig, J., Witthauer, L., Wolfes, M., Workman, R. L., and Zana, L. A. Tue .  
        "Measurement of the decay η'→π0π0η at MAMI".  United States.  doi:10.1103/PhysRevD.98.012001.

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@article{osti_1458793,

  title        = {Measurement of the decay η'→π0π0η at MAMI},

  author       = {Adlarson, P. and Afzal, F. and Ahmed, Z. and Akondi, C. S. and Annand, J. R.  M. and Arends, H. J. and Beck, R. and Borisov, N. and Braghieri, A. and Briscoe, W. J. and Cividini, F. and Collicott, C. and Costanza, S. and Denig, A. and Downie, E. J. and Dieterle, M. and Ferretti Bondy, M. I. and Gardner, S. and Garni, S. and Glazier, D. I. and Glowa, D. and Gradl, W. and Gurevich, G. and Hamilton, D. J. and Hornidge, D. and Huber, G. M. and Käser, A. and Kashevarov, V. L. and Kay, S. and Keshelashvili, I. and Kondratiev, R. and Korolija, M. and Krusche, B. and Lazarev, A. and Linturi, J. and Livingston, K. and MacGregor, I. J.  D. and Manley, D. M. and Martel, P. P. and McGeorge, J. C. and Middleton, D. G. and Miskimen, R. and Mushkarenkov, A. and Neganov, A. and Neiser, A. and Oberle, M. and Ostrick, M. and Ott, P. and Otte, P. B. and Oussena, B. and Paudyal, D. and Pedroni, P. and Polonski, A. and Prakhov, S. and Rajabi, A. and Ron, G. and Rostomyan, T. and Sarty, A. and Sfienti, C. and Sokhoyan, V. and Spieker, K. and Steffen, O. and Strakovsky, I. I. and Strub, T. and Supek, I. and Thiel, A. and Thiel, M. and Tiator, L. and Thomas, A. and Unverzagt, M. and Usov, Y. A. and Wagner, S. and Watts, D. P. and Werthmüller, D. and Wettig, J. and Witthauer, L. and Wolfes, M. and Workman, R. L. and Zana, L. A.},

  abstractNote = {An experimental study of the η' → π0π0η → 6$\gamma$ decay has been conducted with the best up- to-date statistical accuracy, by measuring η' mesons produced in the $\gamma$p → η'p reaction with the A2 tagged-photon facility at the Mainz Microtron, MAMI. The results obtained for the standard parametrization of the η' → π0π0η matrix element are consistent with the most recent results for η' → ππη decays, but have smaller uncertainties. Finally, the available statistics and experimental resolution allowed, for the first time, an observation of a structure below the π+π- mass threshold, the magnitude and sign of which, checked within the framework of the nonrelativistic effective-field theory, demonstrated good agreement with the cusp that was predicted based on the ππ scattering length combination, a0 - a2, extracted from K → 3π decays.},

  doi          = {10.1103/PhysRevD.98.012001},

  journal      = {Physical Review D},

  number       = 1,

  volume       = 98,

  place        = {United States},

  year         = {2018},

  month        = {7}

}

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DOI: 10.1103/PhysRevD.98.012001

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