Heilman, Kenneth M. (1938– )

Braaten, Alyssa

doi:10.1007/978-0-387-79948-3_626

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2015

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“…Its decays into J/ψπ + π − [4] and J/ψπ + π − π 0 [5] with a ratio of branching fractions close to one, indicate a large isospin violation in X decays and make an interpretation as a conventional cc state implausible. The description as a loosely boundD 0 D * 0 S-wave hadronic molecule with even charge parity [6][7][8][9][10][11], on the other hand, naturally explains the proximity of the X mass to theD 0 D * 0 threshold and the quantum numbers J P C = 1 ++ [12,13].…”

Section: Introductionmentioning

confidence: 99%

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Finite volume corrections to the binding energy of the X(3872)

2015

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The quark mass dependence of hadrons is an important input for lattice calculations. We investigate the light quark mass dependence of the binding energy of the X(3872) in a finite box to next-to-leading order in an effective field theory for the X(3872) with perturbative pions (XEFT). At this order, the quark mass dependence is determined by a quark mass-dependent contact interaction in addition to the one-pion exchange. While there is only a moderate sensitivity to the light quark masses in the region up to twice their physical value, the finite volume effects are significant already at box length as large as 20 fm.Comment: 23 pages, 9 figures, REVTe

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Section: Introductionmentioning

confidence: 99%

“…Braaten and Kusunoki exploited this universality in a series of papers on the X using effective field theory methods [10]. They obtained various predictions for production amplitudes, decays, formation, and line shapes of the X(3872) (see Ref.…”

Section: Introductionmentioning

confidence: 99%