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Article
Astronomy & Astrophysics
M. Albaladejo
Summary: A coupled channel analysis is conducted on the D*D-+(0) and D*D-0(+) system to study the recently discovered doubly charmed T-cc(+) state by the LHCb collaboration. The study provides predictions and analysis on the properties and composition of the T-cc(+) state, as well as the possible locations of other related particles.
Article
Astronomy & Astrophysics
Xi-Zhe Ling et al.
Summary: Inspired by the recent discovery of a doubly charmed tetraquark state T-cc(+) by the LHCb Collaboration, this study investigates the decay width of T-cc(+) using the effective Lagrangian approach and assumes it to be an isoscalar DD* molecule. The results show that both T-cc -> DD pi and T-cc -> DD gamma contribute to the decay width, with the former being dominant.
Article
Physics, Multidisciplinary
Jun He et al.
Summary: The researchers predict a new physical phenomenon, a chain reaction of induced fission in hadronic molecular states. They found that the presence of D mesons can lead to the induced fission and chain reaction of X(3872), and this phenomenon may extend to other hadronic molecular states.
CHINESE PHYSICS LETTERS
(2022)
Article
Physics, Multidisciplinary
R. Aaij et al.
Summary: This study reported observing a hadronic state containing four quarks in the Large Hadron Collider experiment, with notable mass and resonance characteristics.
Article
Multidisciplinary Sciences
R. Aaij et al.
Summary: This study reports the discovery of a narrow exotic state in the (DD0)-D-0 pi(+) mass spectrum, which is consistent with a tetraquark state with specific quark content and spin-parity quantum numbers. The study also reveals an unexpected dependence of the production rate on track multiplicity.
NATURE COMMUNICATIONS
(2022)
Editorial Material
Multidisciplinary Sciences
Tian-Wei Wu et al.
Article
Physics, Particles & Fields
Xiang Wei et al.
Summary: This theoretical study investigates the D (D) over barK three body system using the fixed center approximation and the chiral unitary approach. The study finds a resonance structure in the three body K-(D (D) over bar)(X(3720)) scattering amplitude, supporting the formation of a D (D) over barK bound state.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Particles & Fields
Kan Chen et al.
Summary: In this study, a unified description of molecular systems composed of heavy flavor hadrons is given using quark level interaction. The observed states are reproduced and a new state is predicted. The isospin criterion is proposed to explain the preference for lower isospin numbers in molecular candidates.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Nuclear
Qi Xin et al.
Summary: In this study, we investigated the properties of scalar, axialvector, and tensor doubly-charmed tetraquarks without strange, with strange, and with doubly-strange using QCD sum rules. We also provided a possible assignment for the T-cc(+) particle based on the molecular states scenario. The predictions suggest that the lighter DD* molecular state with specific spin-parity and isospin characteristics is the T-cc(+), while the heavier DD* molecular state remains undetected.
EUROPEAN PHYSICAL JOURNAL A
(2022)
Article
Astronomy & Astrophysics
Si-Qiang Luo et al.
Summary: Inspired by the newly observed T thorn cc state, this study systematically investigates the S-wave triple-charm interactions between D eth D??? THORN and D??? and solves the three-body Schrodinger equations with the Gaussian expansion method. The study carefully assesses the S-D mixing and coupled channel effects. The results show that bound states can be formed in the I eth JP THORN 1/4 12 eth 0-; 1-; 2- THORN D???D???D and I eth JP THORN 1/4 12 eth 0-; 1-; 2-; 3- THORN D???D???D??? systems, which can be considered as three-body hadronic molecules.
Article
Astronomy & Astrophysics
Kan Chen et al.
Summary: In this study, we propose a unified framework to describe the interactions between different particles and predict possible molecular states. We also investigate baryon-meson and baryon-baryon systems, considering the breaking effects in their flavor wave functions.
Article
Astronomy & Astrophysics
Tian-Wei Wu et al.
Summary: The paper investigates the recently discovered doubly charmed exotic state T-cc and suggests that it could be a molecular state predicted in theoretical models. The study presents a potential DDD* state and its main decay modes.
Article
Astronomy & Astrophysics
L. R. Dai et al.
Summary: In this study, we extended the theoretical framework to describe the T-cc state as a molecular state of D* D and made predictions for the D* D* and D-s(*) D) systems. We found that bound states only exist in the J(P) = 1+ channel. Additionally, by using input parameters to regularize the loops of the Bethe-Salpeter equation, we observed different binding energies and widths for the D*D* and D*s D-* systems.
Article
Astronomy & Astrophysics
Mao-Jun Yan et al.
Summary: The LHCb Collaboration has recently announced the discovery of the T-cc(+) tetraquark, which is only a few hundred keV below the D*+D-0 threshold. It is expected to have a molecular component, and theoretical predictions can be made accurately due to the separation of scales. The important decay channels include D+D-0 pi(0), (DD0)-D-0 pi(+), and D+D-0 gamma. The mass and width of the T-cc(+) tetraquark depend on the resonance profile due to its closeness to threshold.
Article
Astronomy & Astrophysics
Meng-Lin Du et al.
Summary: In this study, a coupled-channel approach is applied to investigate the charged tetraquark state T-cc(+) recently discovered by the LHCb Collaboration. The observed line shape in the three-body (DD0)-D-0 pi(+) channel is fitted to determine the parameters of the interaction. Special attention is paid to the three-body dynamics in the T-cc(+) and it is argued that considering both the pion exchange between the D and D* mesons and the finite D* width is essential for a self-consistent approach. It is found that the T-cc(+) is a hadronic molecule generated by the interactions in the D*D-+(0) and D*D-0(+) channels, with a compositeness parameter close to unity. Additionally, a predicted isoscalar D* D* molecular partner of the T-cc(+) is proposed under certain assumptions.
Article
Physics, Multidisciplinary
Ning Li et al.
Summary: In 2012, a study identified a loosely bound molecular state composed of two charmed mesons, which is very close to the D*D threshold with a binding energy of around 0.47 MeV. This prediction was later confirmed by new observations from the LHCb.
CHINESE PHYSICS LETTERS
(2021)
Article
Physics, Multidisciplinary
Xiang-Kun Dong et al.
Summary: In this study, the spectrum of hadronic molecules composed of heavy-antiheavy charmed hadrons was examined, with experimental candidates such as X(3872) and Y(4260) fitting well. The success in describing heavy-antiheavy hadronic molecules led to predictions for heavy-heavy cases, highlighting the potential existence of DD* and D-(*)Sigma((*))(c) molecules. Recent experimental findings support the existence of heavy-heavy hadronic molecules, providing opportunities for further observation in upcoming LHCb and other experiments.
COMMUNICATIONS IN THEORETICAL PHYSICS
(2021)
Article
Physics, Particles & Fields
Meng-Lin Du et al.
Summary: This study investigates the nature of three narrow hidden-charm pentaquark states, suggesting P-c(4312) as a Sigma(c)D hadronic molecule, P-c(4440) and P-c(4457) as a Sigma(c)D and Sigma(c)D* hadronic molecules respectively, and identifies a new narrow state P-c(4380). The analysis reveals that the data is consistent with the proposed interpretations.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Yin Huang et al.
Summary: This study proposes the production of a new exotic charged structure T+cc using the central diffractive mechanism, with the total cross sections of the corresponding reaction evaluated based on chiral unitary theory. The results suggest that the cross section for the gamma p -> D+ T over bar -ccA+c reaction can be measured in proposed Electron-Ion Collider in China or experiments in the U.S., potentially verifying the nature of T+cc.
Review
Astronomy & Astrophysics
Sean Fleming et al.
Summary: Researchers have discovered the tetraquark system T thorn cc, which may have a significant molecular component, and have calculated its decay process and differential spectrum in good agreement with experimental measurements. Furthermore, it is pointed out that the existence of shallow bound states of two pseudoscalar charm mesons can significantly enhance the width of T thorn cc if present.
Article
Astronomy & Astrophysics
A. Feijoo et al.
Summary: In this study, a unitary coupled channel analysis was performed on the interaction of the D*D-+(0), D*D-0(+) channels, revealing a state that is barely bound and very close to isospin I = 0. Using experimental data as input, the width of the state and the (DD0π-)-D0+ mass distribution were obtained, showing good agreement with results from other data analyses. When considering experimental resolution, the width of the state was found to be about 43 keV, a significant difference from the initial findings.
Article
Astronomy & Astrophysics
Lu Meng et al.
Summary: The study focuses on the characteristics of the doubly charmed tetraquark state T-cc(+), including binding energy, coupling constants, and various decay channels. The results indicate that the decay width of T-cc(+) -> (DD0)-D-0 pi(+) is the largest, suggesting this as the dominant experimental observation channel.
Article
Astronomy & Astrophysics
J. M. Dias et al.
Summary: By theoretically investigating the double-pole structure of the K-1 (1270) resonance in pseudoscalar-vector meson spectra, this study addresses the final-state interactions between the P and V mesons in (B) over bar -> J/psi rho(K) over bar and (B) over bar -> J/psi(K) over bar*pi weak decays. The dynamically generated K-1 (1270) resonance through these interactions influences the shape of invariant mass distributions, providing insights for future experiments probing PV spectra in these decays.
Article
Physics, Multidisciplinary
A. Martinez Torres et al.
Article
Physics, Multidisciplinary
R. Aaij et al.
PHYSICAL REVIEW LETTERS
(2020)
Article
Astronomy & Astrophysics
R. Aaij et al.
Article
Physics, Nuclear
Li-Sheng Geng et al.
Article
Physics, Nuclear
Rui Chen et al.
Article
Physics, Nuclear
W. H. Liang et al.
EUROPEAN PHYSICAL JOURNAL A
(2015)
Article
Astronomy & Astrophysics
Ning Li et al.
Article
Astronomy & Astrophysics
R. Molina et al.
Article
Astronomy & Astrophysics
D. Gamermann et al.
Article
Astronomy & Astrophysics
L. Roca et al.
Article
Astronomy & Astrophysics
H. Nagahiro et al.
Review
Physics, Multidisciplinary
M Harada et al.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2003)
