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Article
Physics, Nuclear
S. S. Agaev et al.
Summary: We investigated the properties of the new scalar resonances T-cs0(a) (2900)(++) and T-cs0(a)(2900)(0), which were observed as resonant structures in the invariant mass distributions of D-s(+) pi(+) and D-s(+) pi(-) in B+ meson decays. We propose that these resonances can be modeled as molecules M++ = D-s*(+) rho(+) and M-0 = D-s*(+) rho(-) of conventional vector mesons. The mass and current coupling of M++ were calculated using a two-point sum rule method, where the obtained mass value supports the possibility of M++ being a model for the resonance T-cs0(a)(2900)(++).
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Zi-Li Yue et al.
Summary: Inspired by recent observations, we investigated the decay properties of T0cs over bar 0 in a D?K? molecule scenario and estimated the widths of various decay modes. Our estimations indicate that the width of T0cs over bar 0 -D thorn s p- is sizable to be observed, with the dominant mode being D0K0. Based on isospin symmetry, we proposed a search for the Tcs over bar 0o2900 thorn thorn thorn in the D thorn K thorn invariant mass distributions of the B thorn -D thorn D-K thorn process, where preliminary experimental hints have been observed by LHCb Collaboration.
Article
Astronomy & Astrophysics
R. Molina et al.
Summary: We study the mass distribution of D(S)(+)i Pi(-) in the B-0 -> (DDS+)-D-0 Pi(-)decay and find a peak near the thresholds of D (*) (s)rho and D* K*. By incorporating the interactions between D*K* and D (*) (s)rho as coupled channels in the B-0 decay, we obtain a structure that leads to a peak in the D-S(+) Pi(-) mass distribution. We conclude that the interaction between D*K* and D (*) (s)rho is essential for the observed cusp structure and that the experimental width is mainly determined by the decay width of the rho meson. The peak, along with a smooth background, reproduces the experimental mass distribution in the B (0)-> (DDS+)-D-0 Pi(-) decay fairly well.
Article
Physics, Particles & Fields
Qin Qin et al.
Summary: Discoveries of tetraquarks not only enrich the hadronic spectrum but also provide more platforms to understand quantum chromodynamics. We study the production processes of hidden-charm and open-charm tetraquarks in B decays by analyzing their topological amplitudes. Relations between different channels are found, which confront tests by experiments to probe the nature of the tetraquarks. Furthermore, promising channels to find more tetraquarks are proposed.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Physics, Particles & Fields
H. Sundu et al.
Summary: Spectroscopic parameters and widths of the fully open-flavor axial-vector and pseudoscalar tetraquarks XAV and X-PS were calculated using QCD sum rule methods. The masses and current couplings were determined through two-point sum rule computations, taking into account various vacuum condensates. Decay modes were considered to evaluate the full width of XAV and X-PS. By employing the QCD light-cone sum rule method and soft-meson approximation, the partial widths of these decay modes were determined, providing predictions that may be useful in future experimental studies of multiquark hadrons.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Review
Physics, Multidisciplinary
R. L. Workman et al.
Summary: The Review provides a comprehensive summary of particle physics and cosmology, including measurements, searches for hypothetical particles, and summaries of properties and search limits. It consists of two volumes, with Summary Tables, review articles, and Particle Listings.
PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS
(2022)
Article
Astronomy & Astrophysics
Hua-Xing Chen et al.
Summary: In this study, we investigate the decay behaviors of bottom tetraquark and charm tetraquark states within the diquark-antidiquark picture. We calculate their relative branching ratios and propose specific channels for their searches.
Article
Astronomy & Astrophysics
Jia Wei et al.
Summary: This paper investigates the properties of certain quantum states using a multiquark color flux-tube model, including their constituents, spin, and mass. The results suggest that these states can be described by ground and P-wave states of [cs] [(u) over bar(d) over bar] and [cu] [(s) over bar(d) over bar], respectively, and are consistent with experimental measurements.
Article
Physics, Particles & Fields
Ying-Hui Ge et al.
Summary: This study investigates the process B -> (D) over bar D-s pi through several rescattering processes, revealing several triangle singularity peaks. The findings can be used to simulate the observed resonance structures in the spectrum and predict non-resonance signals.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Astronomy & Astrophysics
S. S. Agaev et al.
Summary: This study investigates the structure of Xo4630 thorn discovered in the B thorn & RARR; J=psi phi K thorn process and interprets it as a specific spin-parity tetraquark state. The calculations and experimental results confirm the validity of the interpretation.
Article
Astronomy & Astrophysics
S. S. Agaev et al.
Summary: We investigated the properties of the four-quark mesons X-0 and X-0' and determined that they cannot be identified as the resonance X-0(2900) based on their spectroscopic parameters and decay widths. These findings provide important information for further studies on the structure of X-0 and X-0'.
Article
Physics, Nuclear
V. A. Zheltonozhsky et al.
Summary: The flux-weighted average yields of several reactions were measured for the first time at a bremsstrahlung end-point energy of 20 MeV. The results showed that the semi-direct mechanism, taking into account the isospin splitting of the giant dipole resonance, contributes more significantly to the studied reactions than the statistical mechanism calculated using the TALYS-1.9 code.
EUROPEAN PHYSICAL JOURNAL A
(2022)
Article
Physics, Particles & Fields
Bo Wang et al.
Summary: In this study, the S- and P-wave interactions of (D) over bar *K* are investigated using a coupled-channel formalism to understand the recently observed X-0(2900) and X-1(2900) at LHCb. The experimental event distributions are well described, and two states with different quantum numbers are obtained in a unified framework. The X-1(2900) can be interpreted as the P-wave excitation of the ground-state X0(2900) in the strong molecular picture. The presence of multiple substructures is suggested in the present peak of the D-K+ invariant mass distributions.
EUROPEAN PHYSICAL JOURNAL C
(2022)
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
Physics, Nuclear
Mei-Wei Hu et al.
Summary: The recently observed X-0(2900) is a unique candidate with four different flavors, possibly forming a (D)bar *K* hadronic molecule. The search for its heavy quark spin partners can help reveal the nature of X-0(2900) and provide insights into its various possible forms.
Article
Physics, Particles & Fields
Yan-Ke Chen et al.
Summary: The study focuses on the production mechanism and decay processes of X-0,X-1(2900), and finds that the rescattering mechanism can result in relatively large branching fractions. The isospin can be investigated through B -> DX0,1 +/-,0 decays.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Particles & Fields
Guang-Juan Wang et al.
Summary: The mass spectrum and strong decays of S-wave csqq states in the compact tetraquark scenario were systematically studied. The recently observed X0(2900) might be a good candidate for a tetraquark state, while future experimental search for X(2649) will be helpful.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Nuclear
R. Albuquerque et al.
Summary: The study revisits recent estimates of charm tetraquarks and molecules using QCD spectral sum rules (QSSR) with QCD Laplace sum rule (LSR), incorporating perturbative NLO corrections and contributions of quark and gluon condensates up to dimension-6 in OPE. Results are compared with experimental data, suggesting that the bump near the D-K+ threshold may come from interactions between molecules and scattering mechanisms.
Article
Physics, Nuclear
Xiang-Kun Dong et al.
Summary: The study indicates possible bound states around masses of 3110 MeV and 3240 MeV in similar (D) over bar K-1 systems, but the (D) over bar K-1 systems are not strong enough to form bound states.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Physics, Nuclear
Qi-Nan Wang et al.
Summary: Mass spectra of (D) over bar (()(s)*()) D-(*()) and sc(q) over bar(c) over bar systems were calculated, suggesting the presence of two nearly degenerate states. Predicted mass values are in good agreement with experimental data.
Article
Physics, Nuclear
S. S. Agaev et al.
Summary: This study explores the features of the scalar structure X-0(2900) and treats it as a hadronic molecule composed of conventional mesons. The mass, coupling, and width of X-0(2900) are calculated using QCD two-point sum rule method. The predictions for the mass and width of the hadronic molecule support the molecule interpretation of X-0(2900).
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2021)
Article
Physics, Nuclear
S. S. Agaev et al.
Summary: The newly observed vector resonance X-1(2900) is modeled as an exotic vector state in the study, revealing it may be a tetraquark structure. Results show that the mass and width of X-1(2900) are smaller than experimental values reported by LHCb, but still consistent with theoretical and experimental errors.
Article
Astronomy & Astrophysics
S. S. Agaev et al.
Summary: This study explores properties of the doubly charged vector tetraquark ZV++= [cu][sd] using QCD sum rule methods, predicting its mass and full width, and discussing methods to observe this tetraquark through specific decays.
Article
Astronomy & Astrophysics
Gang Yang et al.
Summary: The study systematically investigates low-lying tetraquark states in the isoscalar and isovector sectors, with various quantum numbers. Compact bound states and narrow resonances are found, mainly due to strong coupling between different channels. The recently discovered X-0, X-1 (2900) structures are shown to be unstable in the formalism used, and multiple candidates are identified in computations with specific quantum numbers.
Article
Astronomy & Astrophysics
Jian-Rong Zhang
Summary: Researchers investigated the possibility of the exotic X-0(2900) as an open-charm tetraquark candidate using QCD sum rules, and found that it could be a 0(+) tetraquark state consistent with experimental data.
Article
Astronomy & Astrophysics
Yaoyao Xue et al.
Summary: Inspired by recent reports of exotic states with four different quark flavors, we systematically investigate tetraquark systems in the quark delocalization color-screening model, proposing possible molecular and bound state interpretations.
Article
Astronomy & Astrophysics
Luciano M. Abreu
Summary: Investigation of hadronic effects on X-J=0, X-1 (2900) states in heavy-ion collisions, using effective Lagrangians to estimate cross sections and analyzing the time evolution of X-J (2900) multiplicities. Comparison of X-J (2900) abundances as hadronic molecular states and tetraquark states at kinetic freeze-out.
Article
Astronomy & Astrophysics
Cheng-Jian Xiao et al.
Summary: In this study, the decays of the observed fully open-flavor tetraquark state X-0(2900) were investigated using an effective Lagrangian approach. The estimated partial widths of X-0(2900) aligned with experimental observations, and predictions were made for the decay behaviors of unobserved states. The results suggest that future experiments searching for these unobserved states may contribute to understanding the nature of X-0(2900).
Article
Astronomy & Astrophysics
T. J. Burns et al.
Summary: This study makes predictions for the production and decays of X(2900) states and their charged partners in B+ and B-0 decays, considering various competing models. Different models show characteristic differences in their predictions, suggesting that future experimental studies have the potential to distinguish among these competing interpretations.
Article
Physics, Multidisciplinary
Hua-Xing Chen et al.
CHINESE PHYSICS LETTERS
(2020)
Article
Physics, Particles & Fields
Yin Huang et al.
EUROPEAN PHYSICAL JOURNAL C
(2020)
Article
Physics, Particles & Fields
Xiao-Hai Liu et al.
EUROPEAN PHYSICAL JOURNAL C
(2020)
Article
Physics, Multidisciplinary
R. Aaij et al.
PHYSICAL REVIEW LETTERS
(2020)
Article
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R. Molina et al.
Article
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A. E. Bondar et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
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R. Aaij et al.
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Astronomy & Astrophysics
Marek Karliner et al.
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Ming-Zhu Liu et al.
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(2020)
Article
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Qi-Fang Lu et al.
Review
Physics, Multidisciplinary
Shahin Agaev et al.
TURKISH JOURNAL OF PHYSICS
(2020)
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S. S. Agaev et al.
EUROPEAN PHYSICAL JOURNAL C
(2018)
Article
Astronomy & Astrophysics
V. M. Abazov et al.
Article
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Wei Chen et al.
PHYSICAL REVIEW LETTERS
(2016)
Article
Physics, Multidisciplinary
R. Aaij et al.
PHYSICAL REVIEW LETTERS
(2016)
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S. S. Agaev et al.
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S. S. Agaev et al.
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S. S. Agaev et al.
