Issues and Opportunities in Exotic Hadrons

  • The last few years have been witness to a proliferation of new results concerning heavy exotic hadrons. Experimentally, many new signals have been discovered that could be pointing towards the existence of tetraquarks, pentaquarks, and other exotic configurations of quarks and gluons. Theoretically, advances in lattice field theory techniques place us at the cusp of understanding complex coupled-channel phenomena, modelling grows more sophisticated, and effective field theories are being applied to an ever greater range of situations. It is thus an opportune time to evaluate the status of the field. In the following, a series of high priority experimental and theoretical issues concerning heavy exotic hadrons is presented.
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R. A. Briceño, T. D. Cohen, S. Coito, J. J. Dudek, E. Eichten, C. S. Fischer, M. Fritsch, W. Gradl, A. Jackura, M. Kornicer, G. Krein, R. F. Lebed, F. A. Machado, R. E. Mitchell, C. J. Morningstar, M. Peardon, M. R. Pennington, K. Peters, J. M. Richard, C. P. Shen, M. R. Shepherd, T. Skwarnicki, E. S. Swanson, A. P. Szczepaniak and C. Z. Yuan. Issues and Opportunities in Exotic Hadrons[J]. Chinese Physics C, 2016, 40(4): 042001. doi: 10.1088/1674-1137/40/4/042001
R. A. Briceño, T. D. Cohen, S. Coito, J. J. Dudek, E. Eichten, C. S. Fischer, M. Fritsch, W. Gradl, A. Jackura, M. Kornicer, G. Krein, R. F. Lebed, F. A. Machado, R. E. Mitchell, C. J. Morningstar, M. Peardon, M. R. Pennington, K. Peters, J. M. Richard, C. P. Shen, M. R. Shepherd, T. Skwarnicki, E. S. Swanson, A. P. Szczepaniak and C. Z. Yuan. Issues and Opportunities in Exotic Hadrons[J]. Chinese Physics C, 2016, 40(4): 042001.  doi: 10.1088/1674-1137/40/4/042001 shu
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Received: 2015-12-15
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    Supported by U.S. Department of Energy(Cohen)

    the Institute of Modern Physics and Chinese Academy of Sciences under contract Y104160YQ0 and agreement No. 2015-BH-02(Coito)

    the U.S. Department of Energy, for grant DE-AC05-06OR23177, under which Jefferson Science Associates, LLC, manages and operates Jefferson Laboratory and DE-SC0006765, Early Career award(Dudek)

    Fermilab, operated by the Fermi Research Alliance under contract number DEAC02-07CH11359 with the U.S. Department of Energy(Eichten)

    BMBF, under contract No. 06GI7121, and the DAAD under contract No. 56889822 and by the Helmholtz International Center for FAIR within the LOEWE program of the State of Hesse(Fischer)

    the German Research Foundation DFG under contract number Collaborative Research Centre CRC-1044(Gradl)

    the Conselho Nacional de Desenvolvimento Cientfico e Tecnolgico-CNPq, Grant No. 305894/2009-9 and Fundao de Amparo Pesquisa do Estado de So Paulo-FAPESP, Grant No. 2013/01907-0(Krein)

    U.S. National Science Foundation, under grants PHY-1068286 and PHY-1403891(Lebed)

    the Brazilian National Council for Scientific and Technological Development under grant CNPq/CAPES-208188/2014-2(Machado)

    U.S. Department of Energy under grant DE-FG02-05ER41374(Mitchell)

    U.S. National Science Foundation under grant PHY-1306805(Morningstar)

    U.S. Department of Energy, supported by Jefferson Science Associates, LLC under contract No. DE-AC05-06OR23177(Pennington)

    the National Natural Science Foundation of China(NSFC) under contract No. 11575017, the Ministry of Science and Technology of China under Contract No. 2015CB856701(Shen)

    U.S. Department of Energy, under grant DE-FG02-05ER41374(Shepherd)

    U.S. National Science Foundation under grant PHY-1507572(Skwarnicki)

    U.S. Department of Energy, under contract DE-AC05-06OR23177 and grant DE-FG0287ER40365(Szczepaniak)

    the National Natural Science Foundation of China(NSFC) under contract numbers 11235011 and 11475187(Yuan).

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Issues and Opportunities in Exotic Hadrons

    Corresponding author: J. J. Dudek, dudek@jlab.org
    Corresponding author: R. E. Mitchell, dudek@jlab.org
    Corresponding author: E. S. Swanson, dudek@jlab.org
  • 1. Theory Center, Thomas Jefferson National Accelerator Facility, 12000 Jefferson Avenue, Newport News, VA 23606, USA
  • 2. Center for Exploration of Energy and Matter, Indiana University, Bloomington, IN 47403, USA
  • 3.  Institute of High Energy Physics, Beijing 100049, China
  • 4.  Indiana University, Bloomington, Indiana 47405, USA
  • 5.  Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA
Fund Project:  Supported by U.S. Department of Energy(Cohen) the Institute of Modern Physics and Chinese Academy of Sciences under contract Y104160YQ0 and agreement No. 2015-BH-02(Coito) the U.S. Department of Energy, for grant DE-AC05-06OR23177, under which Jefferson Science Associates, LLC, manages and operates Jefferson Laboratory and DE-SC0006765, Early Career award(Dudek) Fermilab, operated by the Fermi Research Alliance under contract number DEAC02-07CH11359 with the U.S. Department of Energy(Eichten) BMBF, under contract No. 06GI7121, and the DAAD under contract No. 56889822 and by the Helmholtz International Center for FAIR within the LOEWE program of the State of Hesse(Fischer) the German Research Foundation DFG under contract number Collaborative Research Centre CRC-1044(Gradl) the Conselho Nacional de Desenvolvimento Cientfico e Tecnolgico-CNPq, Grant No. 305894/2009-9 and Fundao de Amparo Pesquisa do Estado de So Paulo-FAPESP, Grant No. 2013/01907-0(Krein) U.S. National Science Foundation, under grants PHY-1068286 and PHY-1403891(Lebed) the Brazilian National Council for Scientific and Technological Development under grant CNPq/CAPES-208188/2014-2(Machado) U.S. Department of Energy under grant DE-FG02-05ER41374(Mitchell) U.S. National Science Foundation under grant PHY-1306805(Morningstar) U.S. Department of Energy, supported by Jefferson Science Associates, LLC under contract No. DE-AC05-06OR23177(Pennington) the National Natural Science Foundation of China(NSFC) under contract No. 11575017, the Ministry of Science and Technology of China under Contract No. 2015CB856701(Shen) U.S. Department of Energy, under grant DE-FG02-05ER41374(Shepherd) U.S. National Science Foundation under grant PHY-1507572(Skwarnicki) U.S. Department of Energy, under contract DE-AC05-06OR23177 and grant DE-FG0287ER40365(Szczepaniak) the National Natural Science Foundation of China(NSFC) under contract numbers 11235011 and 11475187(Yuan).

Abstract: The last few years have been witness to a proliferation of new results concerning heavy exotic hadrons. Experimentally, many new signals have been discovered that could be pointing towards the existence of tetraquarks, pentaquarks, and other exotic configurations of quarks and gluons. Theoretically, advances in lattice field theory techniques place us at the cusp of understanding complex coupled-channel phenomena, modelling grows more sophisticated, and effective field theories are being applied to an ever greater range of situations. It is thus an opportune time to evaluate the status of the field. In the following, a series of high priority experimental and theoretical issues concerning heavy exotic hadrons is presented.

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