Stability of high-density hadron / quark n ; Latter and kaon condensation
Project/Area Number |
18540288
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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Research Institution | Chiba Institute of Technology |
Principal Investigator |
MUTO Takumi Chiba Institute of Technology, Faculty of Information and Computor Science, Professor (60212247)
|
Project Period (FY) |
2006 – 2007
|
Project Status |
Completed (Fiscal Year 2007)
|
Budget Amount *help |
¥1,550,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥150,000)
Fiscal Year 2007: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2006: ¥900,000 (Direct Cost: ¥900,000)
|
Keywords | strangeness / kaons / Bose-Einstein condensation / hyperons / equation of state / density isomer |
Research Abstract |
Self bound states composed of kaon condensates, hyperons, and nucleons, which we call the kaon-condensed hypernuclei (KCYN), have been investigated as one of the existing forms of hadronic system with multi-strangeness. (1) Using a liquid-drop picture, we take into account surface and Coulomb potential effects in the energy of the KCYN. The ground state energy of the KCYN is obtained under the electric charge, strangeness (S), and baryon number (A) conservation conditions. It has been shown that hyperon-mixing plays an important role on the formation of highly dense and deeply bound objects. Systematic change of A and S shows that the number of the embedded K- mesons should be comparable to A to form deeply bound KCYN. In this case, the KCYN is stable against strong decay processes, and it decays only through multiple weak processes. (2) In the relativistic mean-field model, we considered properties of multi-antikaonic nuclei by solving the equations of motion for nucleons, K- mesons, and other (sigma, omega, rho) mesons self-consistently with a local density approximation for nucleons. It has been shown that the nonlinear terms for repulsive interaction between kaons stemming from chiral symmetry become effectively large as the number of the embedded K- mesons increases. Without hyperon-mixing, the increase in the nuclear density inside the nucleus and binding energy is not remarkable as compared with the case (1) with hyperon-mixing. We also discussed a relation between the multi-antikaonic nuclei and kaon condensation in infinite and uniform matter.
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Report
(3 results)
Research Products
(41 results)
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[Presentation] 原子核におけるK中間子の多重束縛状態2007
Author(s)
武藤 巧, 丸山 敏毅, 巽 敏隆
Organizer
日本物理学会第62回年次大会
Place of Presentation
北海道大学札幌キャンパス
Year and Date
2007-09-21
Description
「研究成果報告書概要(和文)」より
Related Report
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[Presentation] K凝縮原子核の構造と崩壊II2007
Author(s)
武藤 巧
Organizer
日本物理学会2007年春季大会
Place of Presentation
首都大学東京
Year and Date
2007-03-25
Description
「研究成果報告書概要(和文)」より
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[Presentation] K凝縮原子核の構造と崩壊2006
Author(s)
武藤 巧
Organizer
日本物理学会2006年秋季大会
Place of Presentation
奈良女子大学
Year and Date
2006-09-20
Description
「研究成果報告書概要(和文)」より
Related Report
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