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Narrow Tetraquarks at Large N · Around

2013

Narrow Tetraquarks at Large N

Knecht, Marc, Peris, Santiago

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Understand

Following a recent suggestion by Weinberg, we use the large-N expansion in QCD to discuss the decay amplitudes of tetraquarks into ordinary mesons as well as their mixing properties.

We find that the flavor structure of the tetraquark is a crucial ingredient to determine both this mixing as well as the decays.
Although in some cases tetraquarks should be expected to be as narrow as ordinary mesons, they may get to be even narrower, depending on this flavor structure.

Built on

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Similar

See, e.g., J. R. Pelaez, Mod. Phys. Lett. A 19
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L. Maiani, F. Piccinini, A. D. Polosa and V. Riquer, Phys. Rev. D 71
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Then

See, e.g., M. Wagner, C. Alexandrou, J. O. Daldrop, M. D. Brida, M. Gravina, L. Scorzato, C. Urbach and C. Wiese, PoS ConfinementX , 108 (2012) [arXiv:1212.1648 [hep-lat]] and references therein
Original
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Later among the works it cites.
S. Weinberg, Phys. Rev. Lett. 110
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Closest in time.
M. Ablikim et al
Original
2013
Closest in time.

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