Article
Astronomy & Astrophysics
Hsiang-nan Li
Summary: An inverse matrix method is developed to solve resonance masses from a dispersion relation obeyed by a correlation function. The nonperturbative spectral density obtained exhibits resonance structures naturally. The analysis reveals characteristics of different glueballs and proposes a mixing framework including gluonium components for certain mesons.
Article
Astronomy & Astrophysics
Csaba L. Korpa, Matthias F. M. Lutz, Xiao-Yu Guo, Yonggoo Heo
Summary: In this study, we propose a nonperturbative and unitary treatment method for multichannel systems with anomalous thresholds based on realistic potentials. We consider an isospin one-half example system with coupled channels, and illustrate various phenomena related to the opening of an anomalous threshold by varying up, down, and strange quark masses. By using a set of low-energy constants adjusted to lattice QCD results, we present the phase shifts and inelasticity parameters for different choices of the pion mass. Our results show the importance of extrapolating lattice QCD calculations towards the physical pion mass.
Review
Physics, Multidisciplinary
Jose R. Pelaez, Arkaitz Rodas
Summary: This paper discusses the simultaneous dispersive analyses of nK -> nK and nn -> KK over bar scattering data and the K/K0*(700) resonance. By reviewing existing data and deriving relevant dispersion relations, precise amplitude parameterizations are obtained, providing rigor and accuracy for modern experimental and phenomenological hadron physics.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2022)
Article
Astronomy & Astrophysics
Xiangyu Jiang, Wei Sun, Feiyu Chen, Ying Chen, Ming Gong, Zhaofeng Liu, Renqiang Zhang
Summary: We perform the first lattice study on the mixing of the isoscalar pseudoscalar meson eta and the pseudoscalar glueball Gin the Nf 1/4 2 QCD at the pion mass m pi approximate to 350 MeV. The eta mass is determined to be m eta 1/4 714o6 thorn o16 thorn MeV. Through the Witten-Veneziano relation, this value can be matched to a mass value of similar to 981 MeV for the SU(3) counterpart of eta. Based on a large gauge ensemble, the eta - G mixing energy and the mixing angle are determined to be jxj 1/4 107o15 thorn o2 thorn MeV and j theta j 1/4 3.46o46 thorn degrees from the eta - G correlators that are calculated using the distillation method. We conclude that the eta - G mixing is tiny and the topology induced interaction contributes most of eta mass owing to the QCD UAo1 thorn anomaly.
Article
Physics, Particles & Fields
Francesco Giacosa, Alessandro Pilloni, Enrico Trotti
Summary: In this study, we investigate the properties of the scalar glueball G and glueball-glueball scattering in the Yang-Mills sector of QCD. We discover a possible bound state called glueballonium and use a dilaton potential to predict its mass and determine the validity of the potential independently.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Astronomy & Astrophysics
Si -wen Li, Hao-qian Li, Sen-kai Luo
Summary: This work derives corrections to the instanton configuration of the flavored gauge field in the D4-D8 model and studies the spectrum of baryon, heavy-light baryon, or heavy-light meson. The experimental data can be fit with the meson data in this model. The interaction of glueball and heavy-light meson or baryon is briefly outlined and the decay rate involving glueball is numerically evaluated.
Article
Astronomy & Astrophysics
A. V. Sarantsev, I. Denisenko, U. Thoma, E. Klempt
Summary: A coupled-channel analysis of BESIII data on radiative J/psi decays into pi pi, K (K) over bar, eta eta and omega phi was performed to determine the ten isoscalar scalar mesons. The masses, widths, and decay modes of these mesons were determined and interpreted as mainly SU(3)-singlet and mainly octet states. Octet isoscalar scalar states were observed with significant yields only in the 1500-2100MeV mass region.
Article
Astronomy & Astrophysics
Subhasis Samanta, Francesco Giacosa
Summary: We study the thermal properties of QFT with three-leg interaction vertices gφ3 and gSφ2, which correspond to the relativistic version of the Yukawa potential. By using a nonperturbative unitarized one-loop resummed technique, we calculate the phase shifts of two-body scattering and infer the system's pressure at nonzero temperature. A bound state is formed when the coupling constant g exceeds a critical value. We estimate the influence of particle interaction on the pressure and show that the contribution of the bound state is canceled out by the residual φφ interaction, leading to a continuous pressure as a function of g.
Article
Physics, Particles & Fields
Wei Kou, Xurong Chen
Summary: This work discusses the production of a tensor glueball in proton-proton and nuclei-nuclei ultraperipheral collisions. The cross section is calculated using the equivalent photon approximation (EPA). The cross section is related to the matrix elements of gamma gamma -> pi(0)G(2) process, which can be described by the distribution amplitudes of the neutral pion and tensor glueball G(2). Predictions for the rapidity distributions and total cross sections of ultraperipheral collisions are presented, considering the theoretical uncertainty. The decay modes and estimated number of events for the final-state tensor glueball are also considered.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Physics, Particles & Fields
David Dudal, Orlando Oliveira, Martin Roelfs
Summary: This study proposes and explores a method for estimating the Kallen-Lehmann spectral density from gauge invariant lattice QCD two point correlation functions through an appropriate inversion method. As a proof of concept, the SU(2) glueball spectrum with quantum numbers J(PC) = 0(++) is investigated, with different values of the lattice spacing. The estimates for the ground state mass are in good agreement with the traditional approach based on the large time exponential behavior of the correlation functions, and hints of excited states in the spectrum are found in the spectral density.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Multidisciplinary Sciences
Adria Canos Valero, Hadi K. Shamkhi, Anton S. Kupriianov, Thomas Weiss, Alexander A. Pavlov, Dmitrii Redka, Vjaceslavs Bobrovs, Yuri Kivshar, Alexander S. Shalin
Summary: The authors demonstrate a super dipole resonance that arises from interfering resonant modes in the scattering of light by small particles. They study the Mie-like scattering from a subwavelength resonator made of a high-index dielectric material and uncover a novel mechanism of superscattering linked to bound states in the continuum. They develop a non-Hermitian model to describe interfering resonances and confirm their findings through a scattering experiment.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Nuclear
Mohammad H. Alhakami, Numa A. Althubiti, Nwuyer A. Al-shammari
Summary: We re-examine the hadronic loop effects on the masses of D* (0) and D*(s0) calculated in quark models in the framework of heavy meson chiral perturbation theory (HMCHPT). Unlike previous approaches, ours reproduces the observed scalar charm states reported by the Particle Data Group (PDG). We show why previous approaches of using HMCHPT in studying mass shift effects due to chiral loops gave unsatisfactory results.
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2023)
Article
Physics, Particles & Fields
Walaa I. Eshraim
Summary: We investigate the ground-state pseudoscalar glueball J(PC) = 0(-+) by calculating its two and three-body decays involving scalar, pseudoscalar, vector, and axial-vector quark-antiquark meson fields. We compute the branching ratios using a parameter-free calculation and assume a mass of 2.6 GeV for the pseudoscalar glueball based on lattice QCD simulations. We also calculate the branching ratios for a pseudoscalar glueball mass of 2.37 GeV, which matches the measured mass of the resonance X(2370) in the BESIII experiment. The results are important for ongoing and planned experiments such as BESIII, Belle-II, and PANDA.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
Hui Liu, Jarah Evslin, Baiyang Zhang
Summary: In a (1 + 1)-dimensional scalar quantum field theory, we calculate the leading-order probability of meson multiplication, which is the inelastic scattering process: kink + meson -> kink +2 mesons. We also calculate the differential probability with respect to the final meson momenta and the probability that one or two of the final mesons recoils back towards the source. In the ultrarelativistic limit of the initial meson, the total probability tends to a constant, which we calculate analytically in the phi 4 model. At this order the meson sector conserves energy on its own, while the incoming meson applies a positive pressure to the kink. This is in contrast with the situation in classical field theory, where Romanczukiewicz and collaborators have shown that, in the presence of a reflectionless kink, only meson fusion is allowed, resulting in a negative radiation pressure on the kink.
Article
Physics, Multidisciplinary
Nicolas Lang, David J. Wilson, Hadron Spectrum Collaboration
Summary: We present lattice QCD calculations for D * K scattering amplitudes, and identify low-lying D1 and D * 2 states with different angular momentum and parity. Our analysis of the scattering amplitudes reveals interesting features, including a near-threshold bound state and a narrow resonance peak.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Particles & Fields
A. Rodas, A. Pilloni, M. Albaladejo, C. Fernandez-Ramirez, V Mathieu, A. P. Szczepaniak
Summary: We conducted a systematic analysis of the J/psi -> gamma pi(0)pi(0) and -> gamma(KSKS0)-K-0 partial waves measured by BESIII. By using a large set of amplitude parametrizations, we reduced the model bias. We determined the physical properties of seven scalar and tensor resonances in the mass range of 1-2.5 GeV. Among them, the well-known f(0)(1500) and f(0)(1710) are considered to be the primary candidates for glueballs, with the latter having the largest glueball component according to the hierarchy of resonance couplings determined from this analysis.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Astronomy & Astrophysics
D. Blas, J. Martin Camalich, J. A. Oller
Summary: In this study, we investigate graviton-graviton scattering in partial-wave amplitudes by unitarizing their Born terms. By introducing an S-matrix associated with this resummation that is free of infrared divergences, based on unitarity and analyticity, we are able to apply S-matrix techniques. A scalar graviton-graviton resonance called the graviball is obtained as a pole in the nonperturbative S-wave amplitude with vacuum quantum numbers. Its resonant effects along the physical real-saxis may peak at values substantially lower than the UV cutoff squared of the theory, potentially leading to phenomenological consequences at relatively low-energy scales, similar to resonance phenomena in QCD.
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
Physics, Particles & Fields
D. Blas, J. Martin Camalich, J. A. Oller
Summary: A method to unitarize the scattering amplitude produced by infinite-range forces is developed and applied to Born terms. The study finds a scalar graviton-graviton resonance called the graviball, and discusses its corrections in the gravitational effective field theory. Additionally, this method is also applicable to Coulomb scattering and an energy-dependent potential based on the Coulomb one.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
J. A. Oller
Summary: This study compares nonrelativistic Coulomb scattering with two unitarization methods for infinite-range forces and finds that one method accurately reproduces the exact solution, while the other method fails to reproduce the known solution and leads to zero binding energy.
Article
Multidisciplinary Sciences
Teng Ji, Xiang-Kun Dong, Miguel Albaladejo, Meng-Lin Du, Feng-Kun Guo, Juan Nieves, Bing-Song Zou
Summary: We propose that the X(3915) observed in the J/psi x channel is the same as the chi(c2)(3930), while the X(3960) observed in the Ds+Ds- channel is an S-wave Ds+Ds- hadronic molecule. Additionally, we find that the B+ -> D+D-K+ component with J(PC) = 0(++) assigned to the X(3915) in the current Review of Particle Physics has the same origin as the X(3960) with a mass of around 3.94 GeV. By analyzing available data in the D (D) over bar and Ds+Ds- channels from B decays and gamma gamma fusion reaction, considering both the D (D) over bar -D-s(D) over bar (s)-D*(D) over bar*-D-s*(D) over bar (s)* coupled channels with 0(++) and a 2(++) state introduced additionally, we find that all the data in different processes can be simultaneously well reproduced, and four hidden-charm scalar molecular states with masses around 3.73, 3.94, 3.99, and 4.23 GeV are produced. These results may deepen our understanding of the spectrum of charmonia and the interactions between charmed hadrons.
Article
Physics, Particles & Fields
L. M. Abreu, M. Albaladejo, A. Feijoo, E. Oset, J. Nieves
Summary: We have studied the contribution of the state X(3930) to the B- -> K- J/psi omega decay, which originates from the interaction of the D ($) over bar and D-s(+) D ($) over bar (s) channels. Our goal is to determine if the X(3930) state observed in the D+ D- channel is the same as the X(3960) resonance claimed by the LHCb Collaboration from a peak in the D-s(+) D s mass distribution around threshold. We predict that a clear signal should be seen around 3930 MeV in the J/psi omega mass distribution, and the absence of a resonance signal at 3960 MeV would support the hypothesis that the near-threshold peaking structure is only a manifestation of a resonance below threshold.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
W. A. Smith, D. I. Glazier, V. Mathieu, M. Albaladejo, M. Albrecht, Z. Baldwin, C. Fernandez-Ramirez, N. Hammoud, M. Mikhasenko, G. Montana, R. J. Perry, A. Pilloni, V. Shastry, A. P. Szczepaniak, D. Winney
Summary: We describe a formalism for analyzing the mathematical ambiguities that arise in the partial-wave analysis of two spinless mesons produced with a linearly polarized photon beam. Our results show that the partial waves are uniquely defined when considering all accessible observables, including S and D waves. The inclusion of higher partial waves does not affect the results, leading us to conclude that there are no mathematical ambiguities in the partial-wave analysis of two mesons produced with a linearly polarized photon beam. We provide Monte Carlo simulations to illustrate our findings.
Article
Astronomy & Astrophysics
M. Albaladejo, S. Gonzalez-Solis, L. . Bibrzycki, C. Fernandez-Ramirez, N. Hammoud, V. Mathieu, M. Mikhasenko, G. Montana, R. J. Perry, A. Pilloni, A. Rodas, W. A. Smith, A. Szczepaniak, D. Winney
Summary: In this study, we investigate the J/ψ→πππ0 decay process within the framework of Khuri-Treiman equations. We find that the experimental dipion mass distribution in the ρ(770)-region obtained by BESIII experiment can be well reproduced with a once-subtracted P-wave amplitude. Furthermore, we show that the inclusion of F-wave amplitudes improves the description of data in the ππ mass region around 1.5 GeV. We also present predictions for the J/ψ→π0γ* transition form factor.
Article
Physics, Nuclear
V. Montesinos, M. Albaladejo, J. Nieves, L. Tolos
Summary: The properties of tetraquark-like states Tcc(3875)+ and Tc over bar c over bar (3875)- are modified in dense nuclear matter. Changes in the spectral functions and scattering amplitudes of heavy quark mesons in a nuclear medium lead to important modifications in the exotic states, with the density playing a crucial role. The distinctive density patterns observed hint at the existence of molecular components in these states, differentiating them from compact quark structures.
Article
Physics, Nuclear
J. M. Alarcon, J. A. Oller
Summary: We investigate the effect of P-wave interactions on the energy of a degenerate gas of spin-1/2 fermions. By summing the ladder diagrams, we calculate the energy per particle in the many-body system and obtain a renormalized result. It is found that the resonance poles caused by P-wave interactions contradict the Hermiticity of the Hamiltonian, resulting in the instability of unpolarized spin-1/2 fermionic normal matter.
Article
Astronomy & Astrophysics
Teng Ji, Xiang-Kun Dong, Miguel Albaladejo, Meng-Lin Du, Feng-Kun Guo, Juan Nieves
Summary: The LHCb Collaboration recently reported a near-threshold enhancement X(3960) and showed that it can be described by either a bound or a virtual state. Using this discovery and existing information, a complete spectrum of S-wave hadronic molecules formed by a pair of charm and anticharm mesons is established, resulting in predicted pole positions for the newly observed state.
Article
Astronomy & Astrophysics
D. Winney, A. Pilloni, V. Mathieu, A. N. Hiller Blin, M. Albaladejo, W. A. Smith, A. Szczepaniak
Summary: Investigating XYZ hadrons through semi-inclusive processes at the next generation of electron-hadron facilities is very promising due to their higher cross sections. The authors extend their formalism on exclusive photoproduction to semi-inclusive final states, predicting the inclusive production cross sections for charged axial-vector Z states from pion exchange. They isolate the contribution of Delta resonances at small missing mass and show an enhancement in production near threshold compared to the exclusive reaction. The model is benchmarked with data on semi-inclusive b(1)(+/-) production.
Article
Physics, Particles & Fields
M. Albaladejo, J. Nieves
Summary: We discuss a model-independent estimator for the likelihood of compositeness of a shallow S-wave bound or virtual state. The estimator is based on an extension of Weinberg's relations and only relies on the proximity of the state's energy to the two-hadron threshold. By analyzing cases such as the deuteron, nucleon virtual state, and exotic Ds*(2317)+/-, we find strong support for the molecular interpretation in all cases, except for Ds*(2317)+/- where the method's applicability reaches its limit.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Astronomy & Astrophysics
Meng-Lin Du, Miguel Albaladejo, Feng-Kun Guo, Juan Nieves
Summary: This study presents a combined analysis of BESIII data on the Z(c)(3900) and Z(cs)(3985) structures, concluding that Z(cs)(3985) is an SU(3) flavor partner of Z(c)(3900). It also successfully reproduces the spectra in both the hidden-charm and hidden-charm strange sectors, supporting the placement of Z(cs)(3985) and Z(c)(3900) in the same SU(3) octet multiplet.
