2021
DOI: 10.48550/arxiv.2107.14784
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Probing the long-range structure of the $T_{cc}^+$ with the strong and electromagnetic decays

Lu Meng,
Guang-Juan Wang,
Bo Wang
et al.

Abstract: Very recently, the LHCb Collaboration reported the doubly charmed tetraquark state T + cc blow the D * + D 0 threshold about 273 keV. As a very near-threshold state, its long-distance structure is very important. In the molecular scheme, we investigate the kinetic allowed strong decays T + cc → D 0 D 0 π + , T + cc → D + D 0 π 0 and radiative decays D + D 0 γ, which are sensitive to the long-range structure of T + cc . In a coupled-channel effective field theory, we extract the coupling constants of T + cc to … Show more

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Cited by 20 publications
(42 citation statements)
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“…The static properties of this resonance have been well predicted by both assumptions as tetraquark or molecule [13][14][15] though some potential models of multiquark state fail to give the mass [16]. Since the observation of this T cc state, discussions of double-heavy four quark states in both molecular configuration [17][18][19][20][21][22][23][24][25][26][27][28][29] and tetraquark picture [30][31][32][33] are performed to explain the static and/or decay properties. However, T cc can be taken as an excellent example for the study of the production mechanism (rather than via decay or static properties) to gain insight on the hadronic structure, and to shed light on the confinement mechanism.…”
Section: • • •mentioning
confidence: 99%
“…The static properties of this resonance have been well predicted by both assumptions as tetraquark or molecule [13][14][15] though some potential models of multiquark state fail to give the mass [16]. Since the observation of this T cc state, discussions of double-heavy four quark states in both molecular configuration [17][18][19][20][21][22][23][24][25][26][27][28][29] and tetraquark picture [30][31][32][33] are performed to explain the static and/or decay properties. However, T cc can be taken as an excellent example for the study of the production mechanism (rather than via decay or static properties) to gain insight on the hadronic structure, and to shed light on the confinement mechanism.…”
Section: • • •mentioning
confidence: 99%
“…The discovery of the first doubly charmed tetraquark state will, undoubtedly, usher in a new era in the study of hadron spectroscopy and improve our understanding of the non-perturbative nature of the strong interaction. After the experimental discovery, some spectroscopic properties and decay channels of the T + cc state have been investigated within different theoretical models [16][17][18][19][20][21]. Note that the spectroscopic parameters and different decay modes of the scalar and pseudoscalar T cc states as well as the T bc and T bb states of different quantum numbers were already investigated in Refs.…”
Section: Introductionmentioning
confidence: 99%
“…In this letter, we demonstrate this by computing the yields of T + cc as well as its potential isospin partners T ++ cc and T 0 cc in Pb-Pb collisions at center-ofmass energy √ s = 2.76 TeV. The closeness of the T + cc to the D 0 D * + and D + D * 0 thresholds not only implies its potential molecular picture, but also indicates large isospin breaking effects in its decay [29], which is similar to the case of the X(3872) [63][64][65] with the nearby D 0 D * 0 + c.c. and D + D * − + c.c.…”
mentioning
confidence: 79%
“…There are many theoretical studies of the open double heavy tetraquark system in the literature, focusing on key issues such as the formation mechanism (i.e. whether the double heavy tetraquark system is bound or not in either molecular picture or compact tetraquark picture) [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19], the double heavy exotic spectrum [20][21][22][23][24][25][26][27][28] and the decay modes/production mechanism [29][30][31][32] and their magnetic dipole moments [33]. Detailed measurements on the p T , rapidity, multiplicity and centrality dependence could help unravel the production mechanism and the internal structures of these hadrons [34][35][36][37].…”
mentioning
confidence: 99%