Morozumi Takuya Takuya MOROZUMI

Articles:  1-9 of 9

  • Primordial Lepton Family Asymmetries in Seesaw Model

    ENDOH Tomohiro , MOROZUMI Takuya , XIONG Zhaohua , Graduate School of Science Hiroshima University , Graduate School of Science Hiroshima University , Graduate School of Science Hiroshima University

    In the leptogenesis scenario, decays of heavy Majorana neutrinos generate lepton family asymmetries, Y_e, Y_μ. and Y_γ. These asymmetries are sensitive to CP violating phases in seesaw models. The tim …

    Progress of Theoretical Physics 111(1), 123-149, 2004-01-25

    DOI  References (36)

  • What can we learn about CP violation from low energy experiments?(Review and progress reports,Flavor Mixing, CP Violation and Origin of Matter)

    Morozumi Takuya

    How CP violation observables in low energy is related to CP violation for baryogenesis. I briefly review the recent development on CP violation in the seesaw model and the connection between CP violat …

    Soryushiron Kenkyu Electronics 106(4), D3-D6, 2003


  • A relation between CP violation at low energy and leptogenesis(SUMMER INSTITUTE 2001, Session 2: Phenomenology)

    Morozumi Takuya

    Recent development of CP violation in the seesaw model is discussed. [2] [4] We emphasize a possible relation between CP violation between low energy and leptogenesis.

    Soryushiron Kenkyu Electronics 104(6), F23-F27, 2002


  • Neutrino Mixing in the Seesaw Model

    HASHIDA Junya , MOROZUMI Takuya , PURWANTO Agus , Department of Physics Hiroshima University , Department of Physics Hiroshima University , Department of Physics Hiroshima University

    We study the neutrino mixing matrix (the MNS matrix) in the seesaw model. By assuming a large mass hierarchy for the heavy right-handed Majorana mass, we show that, in the diagonal Majorana base, the …

    Progress of Theoretical Physics 103(2), 379-391, 2000-02-25

    J-STAGE  References (34)

  • Quark Mass Hierarchy, FCNC and CP Violation in a Seesaw Model

    KIYO Yuichiro , MOROZUMI Takuya , PARADA Paulo , REBELO Margarida N. , TANIMOTO Morimitsu , Deptartment of Physics Hiroshima University , Deptartment of Physics Hiroshima University , Dep. de Fisica Universidade da Beira Interior:CFIF , IST , CFIF , IST:Dep. de Fisica Instituto Superior Tecnico , Science Education Laboratory Ehime University

    The seesaw model of quark masses is studied systematically, focusing on its developments. A framework in which the top quark mass is allowed to be of the order of the electroweak symmetry breaking sca …

    Progress of Theoretical Physics 101(3), 671-706, 1999-03-25

    DOI  References (32)

  • Effective Lagrangian for a Technicolor Model without Exact Custodial Symmetry

    Tadashi YOSHIKAWA , Hiroyuki TAKATA , Takuya MOROZUMI , Department of Physics Hiroshima University , Department of Physics Hiroshima University , Department of Physics Hiroshima University

    Effective Lagrangian including technimesons is constructed for a realistic one-family Technicolor model without exact custodial symmetry. Tree level contributions to oblique correction parameters S an …

    Progress of Theoretical Physics 92(2), p353-376, 1994-08


  • From QCD to Chiral Dynamics a Smooth Transition

    Takuya MOROZUMI , M.N. REBELO , A.I. SANDA , The Rockefeller University , The Rockefeller University , Physics Research Division Superconducting Supercollider Laboratory

    We study the transition from perturbative QCD to Chiral Dynamics (linear σ model), which describe physics between Mw and μ, and between μ and M_π, respectively. This is done within the context of K de …

    Progress of Theoretical Physics 87(1), p185-191, 1992-01


  • CP-Conserving Contribution in the Decays KL→π0γγ and KL→π0e+e-

    Takuya MOROZUMI , Hirotomo IWASAKI , National Laboratory for High Energy Physics , Department of Physics Hiroshima University

    The CP-conserving contribution to the decay K_L⇾π゜e^+e^- is reexamined. The general form of the decay rates for K_L⇾ π゜γγ and K_L⇾π゜γγ⇾π゜e^+e^- (the absorptive part) is obtaine …

    Progress of Theoretical Physics 82(2), p371-379, 1989-08

  • Chiral Symmetry Breaking of Strong Coupling QED

    Takuya MOROZUMI , Hiroto SO , Department of Physics Kyoto University , Research Institute for Fundamental Physics Kyoto University

    The vacuum structure of strong coupling QED is investigated by means of the effective potential method. The introduction of the bilocal auxiliary fields enables us to path-integrate out the gauge and …

    Progress of Theoretical Physics 77(6), p1434-1449, 1987-06


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