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@ARTICLE{Shi:889257,
      author       = {Shi, Yu-Ji and Wang, Wei and Zhao, Zhen-Xing and Meißner,
                      Ulf-G.},
      title        = {{T}owards a heavy diquark effective theory for weak decays
                      of doubly heavy baryons},
      journal      = {The European physical journal / C},
      volume       = {80},
      number       = {5},
      issn         = {1434-6052},
      address      = {Heidelberg},
      publisher    = {Springer},
      reportid     = {FZJ-2021-00162},
      pages        = {398},
      year         = {2020},
      abstract     = {We construct a leading-order effective field theory for
                      both scalar and axial-vector heavy diquarks, and consider
                      its power expansion in the heavy diquark limit. By assuming
                      the transition from QCD to diquark effective theory, we
                      derive the most general form for the effective diquark
                      transition currents based on the heavy diquark symmetry. The
                      short-distance coefficients between QCD and heavy diquark
                      effective field theory are also obtained by a tree level
                      matching. With the effective currents in the heavy diquark
                      limit, we perform a reduction of the form factors for
                      semi-leptonic decays of doubly heavy baryons, and find that
                      only one nonperturbative function is remaining. It is shown
                      that this soft function can be related to the Isgur–Wise
                      function in heavy meson transitions. As a phenomenological
                      application, we take a single pole structure for the reduced
                      form factor, and use it to calculate the semi-leptonic decay
                      widths of doubly heavy baryons. The obtained results are
                      consistent with others given in the literature, and can be
                      tested in the future.},
      cin          = {IAS-4 / IKP-3},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-4-20090406 / I:(DE-Juel1)IKP-3-20111104},
      pnm          = {511 - Computational Science and Mathematical Methods
                      (POF3-511) / DFG project 196253076 - TRR 110: Symmetrien und
                      Strukturbildung in der Quantenchromodynamik (196253076)},
      pid          = {G:(DE-HGF)POF3-511 / G:(GEPRIS)196253076},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000534343500008},
      doi          = {10.1140/epjc/s10052-020-7949-z},
      url          = {https://juser.fz-juelich.de/record/889257},
}