• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Theoretical Studies of Cosmic QCD Phase Transition and Primordial Nucleosynthesis.

Research Project

Project/Area Number 01540253
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 核・宇宙線・素粒子
Research InstitutionTokyo Metropolitan University

Principal Investigator

KAJINO Toshitaka  Tokyo Metro. Univ., Physics, Assistant Prof., 理学部, 助手 (20169444)

Co-Investigator(Kenkyū-buntansha) TOKI Hiroshi  Tokyo Metro. Univ., Physics, Associate Prof., 理学部, 助教授 (70163962)
KUBO Ken-ichi  Tokyo Metro. Univ., Physics, Prof., 理学部, 教授 (50013389)
Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1990: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1989: ¥1,400,000 (Direct Cost: ¥1,400,000)
Keywordsbig bang / QCD (Quantum Chromodynamics) / phase transition / primordial nucleosynthesis / flux tube model / QGP (Quark Gluon Plasma) / inhomogeneous model / SQM (Strange Quark Matter) / 非一様モデル / 宇宙のQCD相転移 / 非一様宇宙 / ビッグバン元素合成 / クォ-ク・グル-オンプラズマ / 暗黒物質
Research Abstract

The universe is presumed to have experienced a phase transition from the quark-gluon plasma phase to the hadron gas phase in <approximately equal> 10 musec after the big-bang. We studied theoretically the time evolution of the baryon number density during the cosmic QCD phase transition which has a potential possibility of creating the inhomogeneous universe in baryons. We also studied the primordial nucleosynthesis which took place in a couple of minutes after the phase transition in order to look for several observational evidence of the inhomogeneous cosmol
There are three microscopic parameters in QCD. They are the coexistence temperature of the two phases, T_C, the surface tension of the phase boundary, sigma, and the baryon penetrability through the phase boundary. We applied the chromoelectric flux tube model to the calculation of the baryon penetration rate. This flux tube model is an effective model of quark confinement in QCD and enjoys success for high energy jet phenomenolog … More y. We found that the penetration rate is several orders of magnitude smaller than the previous value which was estimated from a geometrical consideration in an equilibrium condition. As for T_C and sigma, the lattice QCD simulations give the constraints of 100<T_C<250MeV and sigma<10^7MeV^3.
We applied the result above to the time evolution of baryon number densities in the two phases during the epoch of the cosmic QCD phase transition. The results are summarized as : 1) If 150<T_CMeV, then the baryon number density distribution is close to the homogeneous one. 2) If T_C<150MeV and 10^5<sigma<10^7MeV^3, then the density distribution is strongly inhomogeneous, leading to a different primordial nucleosynthesis from the standard model. 3) If 100<T_C<150McV and sigma <10^5MeV^3, then the high baryon number density can reach the nuclear matter density or more and the primordial strange quark matter can be formed.
In the second case above, the inferred universal baryonic mass density parameter OMEGA is not very far from unity, suggesting that the closed universe, which satisfies the requirement from the inflationary cosmology, is to be realized by baryonic mass alone. The additional hydrodynamical process of homogenization is needed to infer this conclusion. In the third case above, we also found that the created strange quark matter survived evaporation into nucleons in the hot early universe if they include the baryon number larger than 10^<39>. Less

Report

(3 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • Research Products

    (61 results)

All Other

All Publications (61 results)

  • [Publications] R.N.Boyd and T.Kajino: "Can ^9Be provide a test of cosmological theories?" Astrophysical Journal. 336. L55-L58 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T.Kajino G.J.Mathews and K.Ikeda: "Branching ratios for ^3He(^4He,g)^7Be and ^3H(^4He,g)^7 Li." Physical Review. C40. 525-530 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T.Kajino,G.F.Bertsch and F.C.Barker: "Energy dependence of astrophysical Sーfactor for radiative charged particle reactions." Journal of Physical Society of Japan. Suppl 58. 639-645 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S.Kubono,H.Orihara,S.Kato and T.kajino: "Experimental determination of the ^<19>Ne(p,g)^<20>Na reaction rate and breakout probrem from hotーCNO cycle." Astrophysical Journal. 344. 460-463 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] M.Mizoguchi,K.Sumiyoshi,T.Kajino and H.Toki: "Pionーnucleus scattering in the GeV region." Progress of Theoretical Physics. 81. 1217-1224 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] K.Sumiyoshi,K.Kusaka,T.Kamio and T.Kajino: "Baryon evaporation from cosmic quarkーgluon plasma." Physics Letters. 225B. 10-14 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T.Kajino: "Primordial nucleosynthesis and radioactive beams." Nuclear Instruments and Methods. (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] F.C.Barker and T.Kajino: "Channel contributions to low energy ^<12>C(^4He,g)^<16>O cross sections." Australian Journal of Physics. (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S.Kubono et al.: "Structure of ^<21>Mg and the first experimental determination of the ^<20>Na(p,g)^<21>Mg." Nuclear Physics. (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Y.Yamamoto,T.Kajino and K.ーI.Kubo: "Theoretical studies of the ^7Li(^3H,n)^9Be reaction and primordial nucleosynthesis of ^9Be."

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S.Kubono et al.: "New reaction rate for ^8Li(^4He,n)^<11>B and primordial nucleosynthesis of intermediateーtoーheavy mass elements in baryon inhomogeneous cosmologies."

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T.Kajino,K.Sumiyoshi,C.Alcock and G.Mathews: "A new survival condition of primordial strange quark matter."

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S.Kubono et al.: "The proton threshold states in ^<21>Mg relevant to the rpーprocess." Zeitschrift fur Physik. A334. 511-512 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T.Kajino and R.N.Boyd: "Production of light elements in primordial nucleosynthesis." Astrophysical Journal. 359. 267-276 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T.Kajino,G.J.Mathews and G.M.Fuller: "Primordial nucleosynthesis of intermediateーmass elements in baryonーnumber inhomogeneous big bang models:Observational tests." Astrophysical Journal. 364. 7-14 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] K.Sumiyoshi,T.Kajino,C.Alcock and G.Mathews: "The evolution of baryon number density during the cosmic quarkhadron phase transition." Physical Review. D42. 3963-3968 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] M.Fukugita and T.Kajino: "Contribution of the ^3He(^3He,g)^6Li reaction of primordial ^6Li production." Physical Review. D42. 4251-4253 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T.Kajino: "Can quarkーgluon plasma formation in relativistic heavyーion collisions constrain inhomogeneous cosmologies?" Physical Review Letters. 66. 125-128 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] R. N. Boyd, and T. Kajino: "Can ^9Be provide a test of cosmological theories?" Astrophys. J.336. 55 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T. Kajino, G. J. Mathews, and K. Ikeda: "Branching ratios for ^3He(^4He, gamma)^7Be and ^3H(^4He, gamma)^7Li." Phys. Rev.C40. 525 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T. Kajino, G. F. Bertsch, and F. C. Barker,: "Energy dependence of astrophysical S-factor for radiative charged particle reactions." J. Phys. Soc. Japan Suppl.58. 639 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S. Kubono, H. Orihara, S. Kato, and T. Kajino: "Experimental determination of the ^<19>Ne(p, gamma)^<20>Na reaction rate and breakout problem from hot-CNO cycle." Astrophys. J.344. 460 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] M. Mizoguchi, K. Sumiyoshi, T. Kajino, and H. Toki: "Pion-nucleus scattering in the GeV region." Prog. Theor. Phys. 81. 1217 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] K. Sumiyoshi, K. Kusaka, T. Kamio, and T. Kajino: "Baryon evaporation from cosmic quark-gluon plasma." Phys. Lett.B225. 10 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S. Kubono, Y. Funatsu, N. Ikeda, M. Yasue, T. Nomura, Y. Fuchi, H. Kawashima, S. Kato, H. Orihara, H. Miyatake, and T. Kajino: "The proton threshold states in ^<21>Mg relevant to the rp-process." Z. Phys.A334. 511 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T. Kajino, and R. N. Boyd: "Production of light elements in primordial nucleosynthesis." Astrophys. J.359. 267 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T. Kajino, G. J. Mathews, and G. M. Fuller: "Primordial nucleosynthesis of intermediate-mass elements in baryon-number inhomogeneous big-bang models : Observational tests." Astrophys. J.364. 7 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] K. Sumiyoshi, T. Kajino, C. Alcock, and G. Mathews: "The evolution of the baryon number density during the cosmic quark-hadron phase transition." Phys. Rev.D42. 3963 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] M. Fukugita and T. Kajino: "Contribution of the ^3He(^3H, gamma)^6Li reaction to primordial ^6Li production." Phys. Rev.D42. 4251 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T. Kajino: "Can quark-gluon plasma formation in relativistic heavy-ion collisions constrain inhomogeneous cosmologies." Phys. Rev. Lett.66. 125 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T. Kajino: "Primordial nucleosynthesis and radioactive beams." Nucl. Instr. and Meth.(1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] F. C. Barker, and T. Kajino: "Channel contributions to low energy ^<12>C(^4He, gamma)^<16>O cross section." Australian J. Phys.(1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S. Kubono, Y. Funatsu, N. Ikeda, M. Yasue, T. Nomura, Y. Fuchi, H. Kawashima, S. Kato, H. Miyatake, H. Orihara, and T. Kajino: "Structure of ^<21>Mg and the first experimental determination of the ^<20>Na(p, gamma)^<21>Mg stellar reaction rate." Nucl. Phys. A.(1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Y. Yamamoto, T. Kajino and K. -I. Kubo: "Theoretical studies of the ^7Li(^3H, n)^9Be reaction and primordial nucleosynthesis of ^9Be." Nucl. Phys.(1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] S. Kubono, et al. with T. Kajino: "New reaction rate for ^8Li(^4He, n)^<11>B and primordial nucleosynthesis of intermediate-to- heavy mass elements in baryon inhomogeneous cosmologies." Z. Phys.(1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T. Kajino, K. Sumiyoshi, C. R. Alcock and G. J. Mathews: "Can the primordial strange quark nuggets survive until the present time?" Phys. Rev.(1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] R.N.Boyd and T.Kajino: "Can ^9Be provide a test of cosmological theories?" Astrophysical Journal. 336. L55-L58 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Kajino,G.J.Mathews and K.Ikeda: "Branching ratios for ^3He(^4He,g)^7Be and ^3H(^4He,g)^7Li." Physical Review. C40. 525-530 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Kajino,G.F.Bertsch and F.C.Barker: "Energy dependence of astrophysical Sーfactor for radiative charged particle reactions." Journal of Physical Society of Japan. Suppl 58. 639-645 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] S.Kubono,H.Orihara,S.Kato and T.Kajino: "Experimental determination of the ^<19>Ne(p,g)^<20>Na reaction rate and breakout problem from hotーCNO cycle." Astrophysical Journal. 344. 460-463 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] M.Mizoguchi,K.Sumiyoshi,T.Kajino and H.Toki: "Pionーnucleus scattering in the GeV region." Progress of Theoretical Physics. 81. 1217-1224 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] K.Sumiyoshi,K.Kusaka,T.Kamio and T.Kajino: "Baryon evaporation from cosmic quarkーgluon plasma." Physics letters. 225B. 10-14 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Kajino: "Primordial nucleosynthesis and radioactive beams." Nuclear Instruments and Methods. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] F.C.Barker and T.Kajino: "Channel contributions to low energy ^<12>C(^4He,g)^<16>0 cross sections." Australian Journal of Physics. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] S.Kubono et al.: "Structure of ^<21>Mg and the first experimental determination of the ^<20>Na(p,g)^<21>Mg." Nuclear Physics. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] Y.Yamamoto,T.Kajino and K.ーI.Kubo: "Theoretical studies of the ^7Li(^3H,n)^9Be reaction and primordial nucleosynthesis of ^9Be."

    • Related Report
      1990 Annual Research Report
  • [Publications] S.Kubono et al.: "New reaction rate for ^8Li(^4He,n)^<11>B and primordial nucleosynthesis of intermediateーtoーheavy mass elements in baryon inhomogeneous cosmologies."

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Kajino,K.Sumiyoshi,C.Alcock and G.Mathews: "A new survival condition of primordial strange quark matter."

    • Related Report
      1990 Annual Research Report
  • [Publications] S.Kubono et al.: "The proton threshold states in ^<21>Mg relevant to the rpーprocess." Zeitschrift fur Physik. A334. 511-512 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Kajino and R.N.Boyd: "Production of light elements in primordial nucleosynthesis." Astrophysical Journal. 359. 267-276 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Kajino,G.J.Mathews and G.M.Fuller: "Primordial nucleosynthesis of intermediateーmass elements in baryonnumber inhomogeneous bigーbang models:Observational tests." Astrophysical Journal. 364. 7-14 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] K.Sumiyoshi,T.Kajino,C.Alcock and G.Mathews: "The evolution of baryon number density during the cosmic quarkhadron phase transition." Physical Review. D42. 3963-3968 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] M.Fukugita and T.Kajino: "Contribution of the ^3He(^3He,g)^6Li reaction of primordial ^6Li production." Physical Review. D42. 4251-4253 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Kajino: "Can quarkーgluon plasma formation in relativistic heavyーion collisions constrain inhomogeneous cosmologies?" Physical Review Letters. 66. 125-128 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Kajino,G.J.Matews and K.Ikeda: "Branching ratios for^3He(^4He,g)^7Be and ^3H(^4He,g)^7Li" Physical Review. C40. 525-530 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] R.N.Boyd and T.Kajino: "Can ^9Be provide a test of cosmological theories?" Astrophysical Journal. 336. L55-L58 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] T.Kajino,G.F.Bertsch and F.C.Barker: "Energy dependence of astrophysical S-factor for radiative charged particle reactions" Journal of Physical Society of Japan,Suppl.58. 639-645 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] S.Kubono,H.Orihara,S.Kato and T.Kajino: "Experimental determination of the ^<19>Ne(P,g)^<20>Na reaction rate and breakout problem from hot CNO cycle" Astrophysical Journal. 344. 460-463 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] M.Mizoguchi,K.Sumiyoshi,T.Kajino and H.Toki: "Pionic nucleus scattering in the GeV region" Progress of Theoretical Physics. 81. 1217-1227 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] K.Sumiyoshi,K.Kusaka,T.Kamio and T.Kajino: "Baryon evaporation from cosmic quark-gluon plasma" Physics Letters. B225. 10-14 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] T.Kajino: "Physics with High-Intensity Hadron Accelerators" World Scientific Publishing Company, (1990)

    • Related Report
      1989 Annual Research Report

URL: 

Published: 1989-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi