Interaction of Vector Mesons With Baryons and Nuclei

Oset, E.; Ramos, À.; Garzon, E. J.; Molina, R.; Tolós, Laura; Xiao, C. W.; Wu, Jia-Jun; Zou, Bing-Song

doi:10.1142/s0218301312300111

Cited by 64 publications

(67 citation statements)

References 91 publications

(121 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A thorough work in this direction has also been done in [27][28][29]. A review of the hidden gauge approach for vector-baryon and vector-nucleus interaction can be seen in [30].…”

Section: Introductionmentioning

confidence: 99%

Combining heavy quark spin and local hidden gauge symmetries in the dynamical generation of hidden charm baryons

2013

Self Cite

View full text Add to dashboard Cite

We present a coupled channel unitary approach to obtain states dynamically generated from the meson baryon interaction with hidden charm, using constraints of heavy quark spin symmetry. We use as basis of states,DB,D * B states, with B baryon charmed states belonging to the 20 representations of SU(4) with J P = 1/2 + , 3/2 + . In addition we also include the η c N and J/ψN states. The inclusion of these coupled channels is demanded by heavy quark spin symmetry, since in the large m Q limit the D and D * states are degenerate and are obtained from each other by means of a spin rotation, under which QCD is invariant. The novelty in the work is that we use dynamics from the extrapolation of the local hidden gauge model to SU(4) and we show that this dynamics fully respects the constraints of heavy quark spin symmetry.With the full space of states demanded by the heavy quark spin symmetry and the dynamics of the local hidden gauge we look for states dynamically generated and find four basic states which are bound, corresponding toDΣ c ,DΣ * c ,D * Σ c andD * Σ * c , decaying mostly into η c N and J/ψN . All the states appear in isospin I = 1/2 and we find no bound states or resonances in I = 3/2. TheDΣ c state appears in J = 1/2, theDΣ * c in J = 3/2, theD * Σ c appears nearly degenerate in J = 1/2, 3/2 and theD * Σ * c appears nearly degenerate in J = 1/2, 3/2, 5/2, with the peculiarity that in J = 5/2 the state has zero width in the space of states chosen. All the states are bound with about 50 MeV with respect to the correspondingDB thresholds and the width, except for the J = 5/2 state, is also of the same order of magnitude.

show abstract

“…A thorough work in this direction has also been done in [27][28][29]. A review of the hidden gauge approach for vector-baryon and vector-nucleus interaction can be seen in [30].…”

Section: Introductionmentioning

confidence: 99%

Combining heavy quark spin and local hidden gauge symmetries in the dynamical generation of hidden charm baryons

2013

Self Cite

View full text Add to dashboard Cite

show abstract

“…To estimate the uncertainties, we compare two approaches to this implementation, since they differ in size and energy dependence: In Refs. [19,20], vector mesons are introduced through the Hidden Local Symmetry (HLS) approach, where the tree level vector-meson nucleon scattering amplitudes are obtained from a vector-meson exchange mechanism; In Ref. [21], it is obtained within an SU(6) spin-flavor symmetry extension of chiral perturbation theory.…”

Section: Formalismmentioning

confidence: 99%

In-Medium Properties of the ϕ Meson with ϕ N Resonant Contributions

Cabrera¹,

Blin²,

Vacas³

2017

Proceedings of the 14th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU2016)

View full text Add to dashboard Cite

Nuclear production experiments report missing absorption processes of the in-medium ϕ meson. Contributions arising from theKK cloud have already been widely studied, and therefore we investigate the ϕ-meson's properties in cold nuclear matter with the additional inclusion of resonant ϕ N interactions. Two models are considered which dynamically generate N * -like states close to the ϕ N threshold. We find that these states, together with the non-resonant part of the amplitude, contribute to the ϕ self-energy with the same order of magnitude as theKK effects. At non-vanishing nuclear density, both models lead to an additional in-medium broadening of the ϕ, up to around 50 MeV. Furthermore, at least one of the models is compatible with a mass shift to lower energies of up to 35 MeV at threshold and normal matter density. Finally, a double-peak structure appears in the spectral function due to the mixing of resonance-hole modes with the ϕ quasi-particle peak. These results converge into the direction of the experimental findings.

show abstract

“…3 Strange vector mesons: K * ,K * and φ On the theory side, the properties ofK * have been studied in cold nuclear matter [17] starting from a model of theK * N interaction within a unitary chiral Lagrangian approach in coupled channels [14][15][16], extended to account for the coupling to vector mesons from the J P = 1/2 − octet in the Hidden Local Symmetry formalism. TheK * selfenergy receives two contributions associated to (i) its dominant decay modeK * →Kπ and (ii) the quasi-elastic reactionK * N →K * N and related absorption channels.…”

Section: Kn Interaction In Hot and Dense Nuclear Mattermentioning

confidence: 99%

“…A possible mechanism increasing the φ absorption would rely on the φN interaction mediated by vector meson exchange. Such interaction was explored recently in vacuum within the chiral unitary approach of [15] in the S = 0 sector. The generation of a N * resonance around 2 GeV in this approach (right above the φN threshold) may lead to a large selfenergy contribution, further modifying the φ spectral function.…”

Section: Kn Interaction In Hot and Dense Nuclear Mattermentioning

confidence: 99%

S= −1 meson-baryon interaction in hot and dense nuclear matter: chiral symmetry, many-body and unitarization for a road to GSI/FAIR

Cabrera

Tolós

Aichelin

et al. 2015

EPJ Web of Conferences

View full text Add to dashboard Cite

Abstract. The dynamics of strange pseudoscalar and vector mesons in hot and dense nuclear matter is studied within a chiral unitary framework in coupled channels. Our results set up the starting point for implementations in microscopic transport approaches of heavy-ion collisions, particularly at the conditions of the forthcoming experiments at GSI/FAIR and NICA-Dubna. In theKN sector we focus on the calculation of (off-shell) transition rates for the most relevant binary reactions involved in strangeness production close to threshold energies, with special attention to the excitation of sub-threshold hyperon resonances and isospin effects (e.g.K p vsKn). We also give an overview of recent theoretical developments regarding the dynamics of strange vector mesons (K * ,K * and φ) in the nuclear medium, in connection with experimental activity from heavy-ion collisions and nuclear production reactions. We emphasize the role of hadronic decay modes and the excitation of hyperon resonances as the driving mechanisms modifying the properties of vector mesons.

show abstract

Interaction of Vector Mesons With Baryons and Nuclei

Cited by 64 publications

References 91 publications

Combining heavy quark spin and local hidden gauge symmetries in the dynamical generation of hidden charm baryons

Combining heavy quark spin and local hidden gauge symmetries in the dynamical generation of hidden charm baryons

In-Medium Properties of the ϕ Meson with ϕ N Resonant Contributions

S= −1 meson-baryon interaction in hot and dense nuclear matter: chiral symmetry, many-body and unitarization for a road to GSI/FAIR

Contact Info

Product

Resources

About