STRUCTURE OF K-pp SYSTEM AND SUPER-STRONG NUCLEAR FORCE BY MIGRATING K- MESON: ITS THEORETICAL BACKGROUND

2009 ◽  
Vol 24 (11) ◽  
pp. 2118-2125 ◽  
Author(s):  
YOSHINORI AKAISHI ◽  
TOSHIMITSU YAMAZAKI
Keyword(s):  
Nuclear Force ◽  
Bound State ◽  
Theoretical Background ◽  
Molecular Feature ◽  
K Meson ◽  
Nuclear Systems ◽  
Nuclear Clusters ◽  
Nuclear Incompressibility ◽  
Text Interaction ◽  
Better Than

We have studied the structure of K-pp by solving this system in a variational method, starting from the ansatz that Λ* = Λ(1405) is a K-p quasi-bound state. The structure of K-pp reveals a molecular feature, namely, the K- in Λ* as an "atomic center" plays a key role in producing strong covalent bonding with the other proton. Deeply bound [Formula: see text] nuclear systems are formed by this "super-strong" nuclear force due to migrating real bosons [Formula: see text]a la Heitler-London-Heisenberg, which overcompensates the stiff nuclear incompressibility. Theoretical background of our phenomenological [Formula: see text] interaction is discussed, in connection with "decaying-state" description of kaonic nuclear clusters, concerning the effective [Formula: see text] interaction based on chiral SU (3) dynamics. It is of virtual importance to determine whether the Λ* mass is 1405 MeV or 1420 MeV. It is found that a K- absorption at rest in 3 He provides a testing ground better than that in 4 He .

SYSTEMATIC STUDIES OF STRANGE NUCLEAR SYSTEMS: UNUSUAL STRUCTURES FORMED BY A K- MESON

2003 ◽  
Vol 18 (02n06) ◽  
pp. 120-123
Author(s):  
AKINOBU DOTÉ ◽  
YOSHINORI AKAISHI ◽  
TOSHIMITSU YAMAZAKI
Keyword(s):  
Molecular Dynamics ◽  
K Meson ◽  
Nuclear Systems ◽  
Kaonic Nuclei ◽  
New Framework

We have developed a new framework of Antisymmetrized Molecular Dynamics (AMD) for the study of kaonic nuclei. We have improved AMD in the following two points : 1) [Formula: see text] mixing and 2) J & T projections. These improvements enable us to investigate various kaonic nuclei systematically. We have investigated ppnK -, pppK -, pppnK -, 6 BeK -, and 9 BK -.

scholarly journals Bound State of Heavy Quarks Using a General Polynomial Potential

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Hesham Mansour ◽  
Ahmed Gamal
Keyword(s):  
Bound States ◽  
Bound State ◽  
Heavy Quarks ◽  
Polynomial Potential ◽  
Schrödinger’S Equation ◽  
General Polynomial ◽  
L Value ◽  
Schrödinger's Equation ◽  
Better Than ◽  
Good Agreement

In the present work, the mass spectra of the bound states of heavy quarks cc-,bb-, and Bc meson are studied within the framework of the nonrelativistic Schrödinger’s equation. First, we solve Schrödinger’s equation with a general polynomial potential by Nikiforov-Uvarov (NU) method. The energy eigenvalues for any L- value is presented for a special case of the potential. The results obtained are in good agreement with the experimental data and are better than previous theoretical studies.

scholarly journals Scattering of particles bounded to an infinite planar curve

2020 ◽  
Vol 32 (10) ◽  
pp. 2050029
Author(s):  
J. Dittrich
Keyword(s):  
Relativistic Quantum ◽  
Bound State ◽  
Absolutely Continuous Spectrum ◽  
Absolutely Continuous ◽  
Wave Operators ◽  
Quantum Particles ◽  
Planar Curve ◽  
Embedded Eigenvalues ◽  
Text Interaction ◽  
Straight Lines

Non-relativistic quantum particles bounded to a curve in [Formula: see text] by attractive contact [Formula: see text]-interaction are considered. The interval between the energy of the transversal bound state and zero is shown to belong to the absolutely continuous spectrum, with possible embedded eigenvalues. The existence of the wave operators is proved for the mentioned energy interval using the Hamiltonians with the interaction supported by the straight lines as the free ones. Their completeness is not proved. The curve is assumed [Formula: see text]-smooth, non-intersecting, unbounded, asymptotically approaching two different half-lines (non-parallel or parallel but excluding the “U-case”). Physically, the system can be considered as a model of long nanostructural channel.

scholarly journals Coulomb Energy Density Functionals for Nuclear Systems: Recent Studies of Coulomb Exchange and Correlation Functionals

2019 ◽  
Vol 223 ◽  
pp. 01044
Author(s):  
Tomoya Naito ◽  
Ryosuke Akashi ◽  
Gianluca Colò ◽  
Haozhao Liang ◽  
Xavier Roca-Maza
Keyword(s):  
Energy Density ◽  
Nuclear Force ◽  
Correlation Energy ◽  
Coulomb Energy ◽  
Density Functionals ◽  
Electron Systems ◽  
Generalized Gradient ◽  
Generalized Gradient Approximation ◽  
Nuclear Systems ◽  
Exchange And Correlation

The Coulomb exchange and correlation energy density functionals for electron systems are applied to nuclearsystems. It is found that the exchange functionals in the generalized gradient approximation provide agreements with the exact-Fock energy with one adjustable parameter within a few dozen keV accuracy, whereas the correlation functionals are not directly applicable to nuclear systems due to the existence of the nuclear force.

EXPERIMENTAL STUDIES OF ANTIKAON MEDIATED BOUND NUCLEAR SYSTEMS

2007 ◽  
Vol 16 (03) ◽  
pp. 905-918 ◽  
Author(s):  
PAUL KIENLE
Keyword(s):  
Phase Transitions ◽  
Experimental Studies ◽  
Dense Matter ◽  
Nucleon Interaction ◽  
Decay Modes ◽  
Density Distributions ◽  
Nuclear Systems ◽  
Nuclear Clusters ◽  
Experimental Approaches ◽  
Cold Dense Matter

Recent experimental studies of the synthesis and properties of deeply bound antikaon mediated nuclear systems are reviewed. Following a brief introduction in the basic properties of the antikaon–nucleon interaction which may lead to cold and dense antikaonic nuclear systems, we review the results of very first experiments which give indications of the existence of such exotic clusters of matter. Then ongoing efforts to substantiate the early findings are presented and future experimental approaches which will allow a very detailed study of the decay modes, the sizes and density distributions of these kaonic nuclear clusters are discussed including their relevance for possible phase transitions in cold dense matter.

The striking effects of deep cerebellar stimulation on generalized fixed dystonia: case report

2020 ◽  
Vol 132 (3) ◽  
pp. 712-716 ◽  
Author(s):  
Shiro Horisawa ◽  
Takashi Arai ◽  
Naoki Suzuki ◽  
Takakazu Kawamata ◽  
Takaomi Taira
Keyword(s):  
Present Report ◽  
Bound State ◽  
Intrathecal Baclofen ◽  
Superior Cerebellar Peduncle ◽  
Intrathecal Baclofen Therapy ◽  
Promising Treatment ◽  
Cerebellar Peduncle ◽  
Ipsilateral Stimulation ◽  
Better Than ◽  
Fixed Dystonia

Cerebellar neuromodulation could influence the pathological abnormalities of movement disorders through several connections between the cerebellum and the basal ganglia or other cortices. In the present report, the authors demonstrate the effects of cerebellar deep brain stimulation (DBS) on a patient with severe generalized fixed dystonia (FD) that was refractory to bilateral pallidotomy and intrathecal baclofen therapy. A previously healthy 16-year-old girl presented with generalized FD. Bilateral pallidotomy and intrathecal baclofen therapy had failed to resolve her condition, following which she received DBS through the bilateral superior cerebellar peduncle (SCP) and dentate nucleus (DN). Ipsilateral stimulation of the SCP or DN improved the FD, and the ability of DBS administered via the SCP to relax muscles was better than that of DN DBS. A considerable improvement of generalized FD, from a bedridden state to a wheelchair-bound state, was observed in the patient following 6 months of chronic bilateral DBS via the SCP; moreover, the patient was able to move her arms and legs. The findings in the present case suggest that neuromodulation of deep cerebellar structures is a promising treatment for FD that is refractory to conventional treatments.

scholarly journals Three-body systems in pionless effective field theory

2016 ◽  
Vol 25 (05) ◽  
pp. 1641002 ◽  
Author(s):  
Jared Vanasse
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Bound State ◽  
Effective Field ◽  
Nuclear Systems ◽  
History Of ◽  
Three Body ◽  
Theory Formula

Investigations of three-body nuclear systems using pionless effective field theory ([Formula: see text]) are reviewed. The history of [Formula: see text] in [Formula: see text] and [Formula: see text] scattering is briefly discussed and emphasis put on the use of strict perturbative techniques. In addition renormalization issues appearing in [Formula: see text] scattering are also presented. Bound state calculations are addressed and new perturbative techniques for describing them are highlighted. Three-body breakup observables in [Formula: see text] scattering are also considered and the utility of [Formula: see text] for addressing them.

Stresses Round Pins in Holes

1964 ◽  
Vol 15 (4) ◽  
pp. 357-372 ◽  
Author(s):  
H. L. Cox ◽  
A. F. C. Brown
Keyword(s):  
Theoretical Background ◽  
Interference Fit ◽  
The Third ◽  
Existing Data ◽  
Plate Width ◽  
Better Than

SummaryThe existing data relating to stresses round pins in holes are reviewed and co-ordinated.The first part of the paper deals with pins of which the diameter is less than half the plate width and which are no better than a push fit in the hole; the second section deals with larger pins; and the third section deals with interference fit of the smaller pins. The theoretical background is sketched in two appendices, and the results of three series of photoelastic measurements of the effects of clearance of the pin in the hole are described.

scholarly journals The octet meson and octet baryon interaction with strangeness and the Λ(1405)

2015 ◽  
Vol 24 (11) ◽  
pp. 1550088 ◽  
Author(s):  
Jun He ◽  
Pei-Liang Lü
Keyword(s):  
Experimental Data ◽  
Bound State ◽  
Octet Baryon ◽  
Baryon Interaction ◽  
Partial Waves ◽  
Pole Structure ◽  
Text Interaction ◽  
Theoretical Results ◽  
Chiral Lagrangian

The octet meson and baryon interaction with strangeness [Formula: see text] is studied fully relativistically with chiral Lagrangian. In this paper, a Bethe–Salpeter equation (BSE) approach with spectator quasipotential approximation is applied to study the reactions [Formula: see text] with [Formula: see text] and [Formula: see text] with all possible partial waves and theoretical results are comparable with experimental data. It is found that the Weinberg–Tomozawa potential derived from the lowest order chiral Lagrangian only provides the contributions from partial waves with spin-parities [Formula: see text] and [Formula: see text]. Two-pole structure of the [Formula: see text] is confirmed with poles at [Formula: see text] and [Formula: see text] MeV. The lower and higher poles originate from [Formula: see text] interaction as a resonance and [Formula: see text] interaction as a bound state, respectively.

THE PROPERTIES OF THE ${\bar K}^*$ MESON IN DENSE MATTER

2011 ◽  
Vol 26 (03n04) ◽  
pp. 731-733
Author(s):  
R. MOLINA ◽  
L. TOLÓS ◽  
E. OSET ◽  
A. RAMOS
Keyword(s):  
Nuclear Matter ◽  
Decay Channel ◽  
Dense Matter ◽  
Attractive Potential ◽  
K Meson ◽  
Nuclear Matter Density ◽  
Coupled Channels ◽  
Unitary Approach ◽  
Consistent Manner ◽  
Text Interaction

In this talk we review the properties of [Formula: see text] mesons in nuclear matter. A unitary approach in coupled channels within the framework of the local hidden gauge formalism is used to account for the interaction of the antikaon with the nucleons and the [Formula: see text] decay channel is incorporated in matter. The in-medium [Formula: see text] interaction accounts for Pauli blocking effects and the inclusion of the [Formula: see text] self-energy in a self-consistent manner. At normal nuclear matter density, the [Formula: see text] meson feels a moderately attractive potential while the [Formula: see text] width increases enormously becoming up to five times larger than in free space. We also perform the transparency ratio for the γA → K+K*-A′ reaction, which can be a feasible scenario in experimental facilities.

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