Regarding the 2^1S0 and 2^3S1 multiplets

This paper discusses the masses and possible members of 2^1S0 and 2^3S1 meson multiplets in the framework of meson-meson mixing and Regge phenomenology. For the 2^1S0 meson nonet, K＊ （1460） may be the observed state of the 2^1S0 isodoublet with a mass of 1400 MeV and the mass of w（1420） is 1412 MeV. For the 2^3S1 meson nonet, K＊（1410） seems too light to be the 2^3S1 ns member. The fact that the agreement between the present findings and those given by experiments and other different approaches is satisfactory implies that the assignments in this paper may be reasonable.

Towards the understanding of 1^1 p1 meson mass spectrum

Based on the meson-meson mixing and Regge trajectory, this paper establishes the mass relations which can describe the mass spectrum of 1^1 P1 meson state. Using these mass relations, it obtains the mass of K1B, hi （1380） and hc（1P） to be 1358.5MeV, 1468 MeV and 3543.9 MeV, respectively. The results are compared with other theoretical results and should be tested by experiments in the future.

Spectroscopy,decay properties and Regge trajectories of the B and B_s mesons

A Gaussian wave function is used for detailed study of the mass spectra of the B and Bs mesons using a Cornell potential incorporated with （1/m） correction in the potential energy term and expansion of the kinetic energy term up to （p10） for relativistic correction of the Hamiltonian. The predicted excited states for the B and Bs mesons are in very good agreement with results obtained by experiment. We assign B2（5747） and Bs2（5840） as the 1^3p2 state, B1（5721） and Bs1（5830） as the 1P1 state, B0（5732） as the 1^3P0 state, Bs1（5850） as the 1P1 state and B（5970） as the 23S1 state. We investigate the Regge trajectories in the （J,M2） and （nr,M2） planes with their corresponding parameters. The branching ratios for leptonic and radiative-leptonic decays are estimated for the B and Bs mesons. Our results are in good agreement with experimental observations as well as outcomes of other theoretical models.

Mass spectra and Regge trajectories of Λ_c^+,∑_c^0,Ξ_c^0 and Ω_c^0 baryons

We calculate the mass spectra of the singly charmed baryons （∧＋ c, ∑0 c,[I]0c and Ω0 c） using the hypercentral constituent quark model （hCQM）. The hyper color Coulomb plus linear potential is used to calculate the masses ofpositive （up to JP = 7＋/2 ）9 and negative （up to JP = 9-/2）parity excited states. The spin-spin, spin-orbital and tensorinteraction terms are-also incorporated for mass spectra. We have compared our results with other theoretical and lattice QCD predictions for each baryon. Moreover, the known experimental results are also reasonably close to our predicted masses. By using the radial and orbital excitation, we construct Regge trajectories for the baryons in the （n,M2） plane and find their slopes and intercepts. Other properties of these baryons, like magnetic moments, radiative transitions and radiative decay widths, are also calculated successfully.

Spectroscopic study of strangeness=-3Ω^(-)baryon

Ω^(-)baryon with sss quarks has been investigated through many theoretical studies so far but scarcely observed in experiments.Here,an attempt has been made to explore properties of Ω with hypercentral Constituent Quark Model(hCQM)with a linear confining term.The resonance mass spectra have been obtained for 1S-4S,1P-4P,1D-3D,and IF-2F.The Regge trajectory has been investigated for the linear nature based on calculated data along with the magnetic moment.The present work has been compared with various approaches and known experimental findings.

Spectroscopic investigation of light strange S=−1Λ and Σ and S=−2Ξbaryons

The present study is dedicated to light-strange∧with strangeness S=−1 and isospin I=0,with S=−1 and I=1,andΞbaryon with S=−2 andI=1/2.In this study,the hypercentral constituent quark model with linear confining potential has been employed along with a first order correction term to obtain the resonance masses up to approximately 4 GeV.The calculated states include 1S-5S,1P-4P,1D-3D,1F-2F,and 1G(in a few cases)along with all possible spin-parity assignments.Regge trajectories have been explored for the linearity of the calculated masses for(n,M^(2))and(J,M^(2)).Magnetic moments have been intensively studied for ground state spin 1/2 and,3/2 in addition to the configuration mixing of the first negative parity state for.Lastly,the transition magnetic moments and radiative decay widths have been presented.

Spectroscopic properties of Δ baryons

The resonance state of theΔ baryon,which exists in four isospin(I=3/2)states,has been studied using the hypercentral constituent quark model(hCQM)with a simple linear potential with added first order correction.The calculated data ranges for 1S-5S,1P-5P,1D-4D and 1F-2F are given,with possible spin-parity assignments for all the states.The magnetic moments have also been obtained for all four configurations.TheN\pidecay channel width has been calculated for a few states.The linear nature of the data has been verified through Regge trajectories.

Spectroscopy and decay properties of charmonium

The mass spectra of charmonium are investigated using a Coulomb plus linear（Cornell）potential.Gaussian wave functions in position space as well as in momentum space are employed to calculate the expectation values of potential and kinetic energy respectively.Various experimental states（X（4660）（5^3S1）,X（3872）（2^3P1）,X（3900）（2^1P1）,X（3915）（2^3P0）and X（4274）（3^3P1）etc.）are assigned as charmonium states.We also study the Regge trajectories,pseudoscalar and vector decay constants,electric and magnetic dipole transition rates,and annihilation decay widths for charmonium states.

Spectroscopy of the ?_(ccb) baryon in the hypercentral constituent quark model

We extract the mass spectrum of the triply heavy baryon ?ccbusing the hypercentral constituent quark model. The first order correction is also added to the potential term of the Hamiltonian. The radial and orbital excited state masses are determined, and the Regge trajectories and magnetic moments for this baryon are also given.

Hadronic spectra from deformed AdS backgrounds

Because of the presence of modified warp factors in metric tensors,we use deformed AdS5 spaces to apply the AdS/CFT correspondence to calculate the spectra for even and odd glueballs,scalar and vector mesons,and baryons with different spins.For the glueball cases,we derive their Regge trajectories and compare them with those related to the pomeron and the odderon.For the scalar and vector mesons,as well as baryons,the determined masses are compatible with the PDG.In particular,for these hadrons we found Regge trajectories compatible with another holographic approach as well as with the hadronic spectroscopy,which present an universal Regge slope of approximately 1.1 GeV^2.