Production of Scalar $K\bar{K}$ Molecules in ϕ Radiative Decays

1997 ◽  
Vol 12 (28) ◽  
pp. 5019-5037 ◽  
Author(s):  
N. N. Achasov ◽  
V. V. Gubin ◽  
V. I. Shevchenko
Keyword(s):  
Imaginary Part ◽  
Mass Spectra ◽  
Mass Region ◽  
Resonance Width ◽  
Radiative Decays ◽  
Meson Mass ◽  
Resonance Production ◽  
Production Amplitude ◽  
Narrow Resonance ◽  
Scalar Resonance

The potentialities of the production of the scalar [Formula: see text] molecules in the ϕ radiative decays are considered beyond the narrow resonance width approximation. It is shown that BR (ϕ → γ f0(a0) → γππ(πη)) ≈ (1 ÷ 2) × 10-5, [Formula: see text] and BR (ϕ → γ (f0 + a0) → γ KSKS) < 5 · 10-8. The mass spectra in the ππ, πη, K+K- channels are calculated. The imaginary part of the amplitude ϕ → γ f0(a0) is calculated analytically. It is obtained by the phase of the scalar resonance production amplitude that causes the interference patterns in the reaction e+e- → γπ+π- in the ϕ meson mass region.

ϒand possible heavy-meson mass spectra

1978 ◽  
Vol 18 (1) ◽  
pp. 341-343
Author(s):  
Kohji Hirata ◽  
Tsunehiro Kobayashi ◽  
Nobuyuki Nakamaru
Keyword(s):  
Mass Spectra ◽  
Heavy Meson ◽  
Meson Mass

scholarly journals Studies of the resonance components in the $$B_s$$ decays into charmonia plus kaon pair

2019 ◽  
Vol 79 (9) ◽  
Author(s):  
Zhou Rui ◽  
Ya Li ◽  
Hong Li
Keyword(s):  
Mass Spectra ◽  
Branching Ratios ◽  
Mass Region ◽  
Lhcb Collaboration ◽  
High Mass ◽  
Mass Window ◽  
Resonant Structures ◽  
Three Body ◽  
Near Future ◽  
Existing Data

Abstract In this work, the decays of $$B_s$$Bs meson to a charmonium state and a $$K^+K^-$$K+K- pair are carefully investigated in the perturbative QCD approach. Following the latest fit from the LHCb experiment, we restrict ourselves to the case where the produced $$K^+K^-$$K+K- pair interact in isospin zero S, P, and D wave resonances in the kinematically allowed mass window. Besides the dominant contributions of the $$\phi (1020)$$ϕ(1020) resonance in the P-wave and $$f_2'(1525)$$f2′(1525) in the D-wave, other resonant structures in the high mass region as well as the S-wave components are also included. The invariant mass spectra for most of the resonances in the $$B_s\rightarrow J/\psi K^+K^-$$Bs→J/ψK+K- decay are well reproduced. The obtained three-body decay branching ratios can reach the order of $$10^{-4}$$10-4, which seem to be accessible in the near future experiments. The associated polarization fractions of those vector-vector and vector-tensor modes are also predicted, which are compared with the existing data from the LHCb Collaboration.

Correlations between the baryon and meson mass spectra

1992 ◽  
Vol 13 (3) ◽  
pp. 105-115 ◽  
Author(s):  
A. Gonzalez
Keyword(s):  
Mass Spectra ◽  
Meson Mass

Di-lepton production in heavy-ion collisions and the QCD phase diagram

Open Physics ◽  
2012 ◽  
Vol 10 (6) ◽  
Author(s):  
Yifei Zhang ◽  
Haojie Xu ◽  
Wangmei Zha ◽  
Qun Wang
Keyword(s):  
Phase Diagram ◽  
Mass Spectra ◽  
Heavy Ion ◽  
Mass Region ◽  
Lepton Production ◽  
Qcd Phase Diagram ◽  
Ion Collisions ◽  
200 Gev ◽  
Star Experiment ◽  
Low Mass

AbstractWe reproduce di-electron spectra in the region of 0 < m e+e < 4 GeV in both minimum bias and central Au+Au collisions at $\sqrt {s_{NN} } $ = 200 GeV measured by the STAR experiment. A cocktail simulation, incorporating STAR acceptance and detector responses, is able to describe the “enhancement” of the low mass region by including an in-medium modification of vector mesons and a thermal di-lepton calculation. We also predict the di-lepton mass spectra in RHIC lower energies via an extrapolation method. The evolution of Di-lepton mass spectra, effective temperature, and possible medium modifications versus colliding energies are studied to explore the QCD phase diagram.

scholarly journals ASYMMETRY OF IN-MEDIUM ρ-MESONS AS A SIGNATURE OF CHERENKOV EFFECTS

2009 ◽  
Vol 24 (06) ◽  
pp. 1221-1228 ◽  
Author(s):  
I. M. DREMIN ◽  
V. A. NECHITAILO
Keyword(s):  
Mass Spectra ◽  
Meson Mass ◽  
Low Mass ◽  
The Asymmetry

Cherenkov gluons may be responsible for the asymmetry of dilepton mass spectra near ρ-meson observed in experiment. They can be in charge only for dileptons in the low-mass wing of the resonance. Therefore the dilepton mass spectra are flattened there and their peak is slightly shifted to lower masses compared with the in-vacuum ρ-meson mass. This feature must be common for all resonances.

scholarly journals Meson Mass Spectra Based on a Bilocal Model

1979 ◽  
Vol 61 (3) ◽  
pp. 973-975
Author(s):  
S. Kojima
Keyword(s):  
Mass Spectra ◽  
Meson Mass

scholarly journals RESONANCE PRODUCTION IN PERIPHERAL HEAVY-ION COLLISIONS

1994 ◽  
Vol 09 (22) ◽  
pp. 2075-2081 ◽  
Author(s):  
A.A. NATALE
Keyword(s):  
Pseudoscalar Meson ◽  
Heavy Ion Collisions ◽  
Meson Production ◽  
Heavy Ion ◽  
Resonance Production ◽  
Charmed Mesons ◽  
Powerful Source ◽  
Two Photon ◽  
Ion Collisions ◽  
Scalar Resonance

Heavy-ion collisions at ultrarelativistic energies may be used as a powerful source of photons and pomerons. We compute the rates for pseudoscalar meson production through two-photon and two-pomeron scattering, at energies that will be available at RHIC and LHC. Light mesons will mostly be produced by pomeron fusion at large rates, the two processes are comparable for charmed mesons, while electromagnetic production will be dominant for bottom mesons. We discuss the possibility of observing the reaction γγ(PP)→R→γγ, and comment on the particular case where R could be a scalar resonance at 650 MeV.

Meson mass spectra in the quark-string model

1978 ◽  
Vol 73 (2) ◽  
pp. 214-218 ◽  
Author(s):  
K. Kikkawa ◽  
Tsuneyuki Kotani ◽  
Masa-aki Sato
Keyword(s):  
Mass Spectra ◽  
String Model ◽  
Meson Mass

Orbital excited meson mass spectra in the solvable potential model of two-body Dirac equation

2014 ◽  
Vol 29 ◽  
pp. 1460246 ◽  
Author(s):  
Jun-Kang He ◽  
Yue Li ◽  
Hong Chen
Keyword(s):  
Dirac Equation ◽  
Mass Spectra ◽  
Potential Model ◽  
Solvable Model ◽  
Heavy Meson ◽  
Meson Mass ◽  
Angular Structure ◽  
Complex Spin ◽  
Meson States ◽  
Coulomb Potentials

The meson mass spectra are obtained by solving exactly the two-body Dirac equation for the linear plus Coulomb potentials with complex spin-angular structure. In such a solvable model, the orbital excited heavy meson states as well as the orbital light meson states agree well with available experimental data. It turns out that the quark-antiquark interaction potential may be more intricate than those predicted so far.

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