scholarly journals Constraining the strangeness content of the nucleon by measuring theϕmeson mass shift in nuclear matter

2014 ◽  
Vol 90 (9) ◽  
Author(s):  
Philipp Gubler ◽  
Keisuke Ohtani
Keyword(s):  
Nuclear Matter ◽  
Mass Shift ◽  
Strangeness Content

scholarly journals QUARKONIUM CHROMO-POLARIZABILITY FROM THE DECAYS J/ψ(ϒ)→ππℓ+ℓ-

2004 ◽  
Vol 19 (09) ◽  
pp. 665-670 ◽  
Author(s):  
M. B. VOLOSHIN
Keyword(s):  
Nuclear Matter ◽  
Quark Mass ◽  
Mass Shift ◽  
Soft Gluon ◽  
Electric Interaction ◽  
Precision Determination ◽  
B Quark

It is pointed out that the diagonal amplitude of the E1–E1 chromo-electric interaction with soft gluon fields (chromo-polarizability) can be measured directly for the J/ψ and ϒ resonances in the decays J/ψ→ππℓ+ℓ- and ϒ→ππℓ+ℓ- with soft pions. For the J/ψ this amplitude is often discussed in connection with the J/ψ interaction with nuclear matter, while for the ϒ the chromo-polarizability enters the estimates of the nonperturbative mass shift of the resonance relevant to precision determination of the b quark mass from the ϒ mass.

scholarly journals J/Ψ mass shift in nuclear matter

2011 ◽  
Vol 697 (2) ◽  
pp. 136-141 ◽  
Author(s):  
G. Krein ◽  
A.W. Thomas ◽  
K. Tsushima
Keyword(s):  
Nuclear Matter ◽  
Mass Shift

Thermodynamic instabilities in high energy heavy-ion collisions

2015 ◽  
Vol 29 (18) ◽  
pp. 1550092
Author(s):  
A. Lavagno ◽  
D. Pigato ◽  
G. Gervino
Keyword(s):  
Phase Transition ◽  
Nuclear Matter ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
High Energy ◽  
Baryon Density ◽  
Mechanical Instability ◽  
Ion Collisions ◽  
Nuclear Ground State ◽  
Strangeness Content

One of the very interesting aspects of high energy heavy-ion collisions experiments is a detailed study of the thermodynamical properties of strongly interacting nuclear matter away from the nuclear ground state. In this direction, many efforts were focused on searching for possible phase transitions in such collisions. We investigate thermodynamic instabilities in a hot and dense nuclear medium where a phase transition from nucleonic matter to resonance-dominated [Formula: see text]-matter can take place. Such a phase transition can be characterized by both mechanical instability (fluctuations on the baryon density) and by chemical-diffusive instability (fluctuations on the strangeness concentration) in asymmetric nuclear matter. In analogy with the liquid–gas nuclear phase transition, hadronic phases with different values of antibaryon–baryon ratios and strangeness content may coexist. Such a physical regime could be, in principle, investigated in the future high-energy compressed nuclear matter experiments which will make it possible to create compressed baryonic matter with a high net baryon density.

scholarly journals Mass shift of σ-meson in nuclear matter

Pramana ◽  
2013 ◽  
Vol 80 (3) ◽  
pp. 479-485
Author(s):  
J R MORONES-IBARRA ◽  
MÓNICA MENCHACA MACIEL ◽  
AYAX SANTOS-GUEVARA ◽  
FELIPE ROBLEDO PADILLA
Keyword(s):  
Nuclear Matter ◽  
Mass Shift

STABILITY OF NEUTRON STARS WITH LARGE AMOUNT OF STRANGENESS AND THE ROLE OF δ-MESON

2007 ◽  
Vol 16 (09) ◽  
pp. 2855-2858 ◽  
Author(s):  
M. RAZEIRA ◽  
A. MESQUITA ◽  
C. A. Z. VASCONCELLOS ◽  
B. E. J. BODMANN ◽  
M. DILLIG ◽  
...  
Keyword(s):  
Neutron Star ◽  
Equation Of State ◽  
Neutron Stars ◽  
Nuclear Matter ◽  
Lagrangian Density ◽  
Stability Conditions ◽  
Meson Field ◽  
Strange Quarks ◽  
Strangeness Content

We investigate the role of the strange σ*, ϕ and δ meson fields on the delineation of main properties of neutron stars using a parameterized Lagrangian density model in the effective baryon and meson sectors. We assume, strange quarks are localized within the hyperon fields, which carry the strangeness content of the model. Our main goal is to analyze stability conditions of neutron stars with large amount of strangeness per baryon. Our main result indicates the inclusion of the strange (anti-)quark containing meson field σ*, besides ϕ and δ into nuclear matter, turn the equation of state stiffer this way increasing the gravitational mass of the neutron star.

STABILITY OF NEUTRON STARS WITH A LARGE AMOUNT OF STRANGENESS

2007 ◽  
Vol 16 (02n03) ◽  
pp. 347-356
Author(s):  
MOISES RAZEIRA ◽  
BARDO E. J. BODMANN ◽  
CÉSAR A. ZEN VASCONCELLOS ◽  
ALEXANDRE MESQUITA
Keyword(s):  
Neutron Star ◽  
Equation Of State ◽  
Neutron Stars ◽  
Nuclear Matter ◽  
Lagrangian Density ◽  
Stability Conditions ◽  
Strange Quarks ◽  
Strange Meson ◽  
Strangeness Content

We investigate the role of the strange σ* and ϕ meson fields on the delineation of the main properties of neutron stars using a parameterized Lagrangian density model in the effective baryon and meson sectors. We assume strange quarks are localized within the hyperon fields which carry the strangeness content of the model. Our main goal is to analyze stability conditions of neutron stars with a large amount of strangeness per baryon. Our main result indicates the inclusion of the strange meson fields σ* and ϕ into nuclear matter make the equation of state stiffer thereby increasing the gravitational mass of the neutron star.

scholarly journals $\eta$ mesons in hot magnetized nuclear matter

2021 ◽  
Author(s):  
Rajesh Kumar ◽  
Arvind Kumar
Keyword(s):  
Magnetic Field ◽  
Nuclear Matter ◽  
Optical Potential ◽  
Mass Shift ◽  
Medium Effect ◽  
Eta Mesons ◽  
Chiral Model ◽  
Combined Approach ◽  
Eta Meson ◽  
Medium Mass

Abstract The $\eta N$ interactions are investigated in the hot magnetized asymmetric nuclear matter using chiral SU(3) model and chiral perturbation theory (ChPT). In the chiral model, the in-medium properties of $\eta$-meson are calculated by the medium modified scalar densities under the influence of an external magnetic field. Further, in the combined approach of chiral model and ChPT, off-shell contributions of $\eta N$ interactions are evaluated from the ChPT effective $\eta N$ Lagrangian, and the in-medium effect of scalar densities are incorporated from the chiral SU(3) model. We observe a significant effect of magnetic field on the in-medium mass and optical potential of $\eta$ meson. We observe a deeper mass-shift in the combined approach of ChPT and chiral model compared to the effect of solo chiral SU(3) model. In both approaches, no additional mass-shift is observed due to the uncharged nature of $\eta$ mesons in the presence of magnetic field.

Sign in / Sign up

Export Citation Format

Share Document