著者

Kobayashi Makoto Maskawa Toshihide

出版者

The Yukawa Institute for Theoretical Physics and the Physical Society of Japan

雑誌

Progress of Theoretical Physics (ISSN:0033068X)

巻号頁・発行日

vol.49, no.2, pp.652-657, 1973-02

被引用文献数

5227

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In a framework of the renormalizable theory of weak interaction, problems of CP-violation are studied. It is concluded that no realistic models of CP-violation exist in the quartet scheme without introducing any other new fields. Some possible models of CP-violation are also discussed.

著者

Ohkuwa Yoshiaki

出版者

一般社団法人日本物理学会

雑誌

Progress of theoretical physics (ISSN:0033068X)

巻号頁・発行日

vol.65, no.3, pp.1058-1067, 1981-03-25

被引用文献数

20

---

We calculate neutrino velocity in a background gravitational field on the basis of the Weinberg-Salam model and the general theory of relativity. We get an unexpected result which apparently contradicts with the equivalence principle. The neutrino velocity is greater than the ordinary light velocity C for some background metrics. The origin of this effect is that the neutrino, being virtually a pair of e^--W^+ or ν-Z, gets a quantum field theoretical space-time extension and feels tidal force. We discuss the relation between our result and the macrocausality.

著者

IKEDA Minoru MINAMI Shigeo

出版者

一般社団法人日本物理学会

雑誌

Progress of theoretical physics (ISSN:0033068X)

巻号頁・発行日

vol.62, no.2, pp.561-563, 1979-08-25

著者

Fukai T. Kizukuri Y. Oshimo N. Otake Y. Sugiyama N.

出版者

Oxford University Press (OUP)

雑誌

Progress of Theoretical Physics (ISSN:0033068X)

巻号頁・発行日

vol.78, no.2, pp.395-412, 1987-08-01

著者

Swanson Mark S. Huang Justin C. Physics Department University of Missouri Physics Department National Central University

出版者

Published for the Research Institute for Fundamental Physics by Physical Society of Japan

雑誌

Progress of Theoretical Physics (ISSN:0033068X)

巻号頁・発行日

vol.58, no.1, pp.p113-127, 1977-07

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We demonstrate that the finite temperature effective potential methods used in φ^4 field theory to study the symmetry behavior can be successfully applied to magnon fields. The Heisenberg Hamiltonian is converted into field theoretical form by the use of the Holstein-Primakoff transformations and continuum limit methods. Diagrammatic procedures are utilized to calculate the effective potential to the two-loop approximation. The critical temperature is determined by locating the point where the symmetry is restored. In constrast with φ^4 theory, the gauge symmetry is broken above the critical point and is restored below the critical point. Both high and low temperature approximations are utilized.

著者

Ito Yukio Faculty of Education Fukushima University

出版者

Published for the Research Institute for Fundamental Physics by Physical Society of Japan

雑誌

Progress of Theoretical Physics (ISSN:0033068X)

巻号頁・発行日

vol.87, no.5, pp.p1299-1304, 1992-05

---

Assuming σ=τ=±π/2 and m_um_d≪m_tm_b, ReΔ_<31>>0, ReΔ_<22><0 and m_t^<phy><93 GeV are suggested, where σ, τ denote two fundamental phases in the Fritzsch-type quark mass matrix and Δ_<iα> stands for U_<jβ>U_<kγ>U*_<jγ>U*_<kβ> in terms of the quark mixing matrix elements U_<ij>. Further &mid;U_<21>/U_<12>, &mid;U_<13>/U_<23>&mid; and ImΔ_<iα> are discussed.

著者

Yasutake Nobutoshi Hashimoto Masa-aki Eriguchi Yoshiharu Department of Physics Kyushu University Department of Physics Kyushu University Department of Earth Science and Astronomy Graduate School of Arts and Sciences University of Tokyo

出版者

Published for the Yukawa Institute for Theoretical Physics and the Physical Society of Japan

雑誌

Progress of theoretical physics (ISSN:0033068X)

巻号頁・発行日

vol.113, no.5, pp.953-962, 2005-05-25

参考文献数

45

被引用文献数

17

---

We present a scenario for the formation of strange stars due to spin-down of rapidly rotating neutron stars left after supernova explosions. In this scenario the rapid rotation plays a crucial role. We assume that the total baryon mass is conserved but that both total energy and angular momentum are lost due to emission of gravitational waves and/or magnetic braking. Under this assumption, we calculate the transition from rapidly rotating neutron stars to slowly rotating strange stars. As a result, we find that a large amount of energy, ~10^<53>, ergs is released. The liberated energy might become a new energy source for the delayed explosion of a supernova. Furthermore, our scenario suggests that supernovas associated with gamma-ray bursts are feasible sources of observable gravitational waves.

著者

Shirafuji Takeshi

出版者

一般社団法人日本物理学会

雑誌

Progress of theoretical physics (ISSN:0033068X)

巻号頁・発行日

vol.70, no.1, pp.18-35, 1983-07-25

被引用文献数

1 128

---

Lagrangian mechanics of massless particles with spin is studied, based on the interpretation that spin corresponds to displacement in complex directions. Starting with the action integral which ensures the masslessness of particles, two possibilities to introduce spin are investigated. In both cases, the equations of motion cannot fix the world line of massless spinning particles uniquely, due to a "gauge" invariance property of the action integral. The space-time coordinates are not the most suitable for describing massless spinning particles, but it is convenient to take a pair of spinor variables, i.e., a twistor, as the basic dynamical variables to which the canonical quantization procedure can be applied. In one of the two cases, where massless particles are considered to move in superspace with N spinor coordinates, it is found that massless particles form a spin (or helicity) multiplet with the helicity running from - N/4 to + N/4.

著者

Sakamoto Toshio

出版者

一般社団法人日本物理学会

雑誌

Progress of theoretical physics (ISSN:0033068X)

巻号頁・発行日

vol.78, no.2, pp.423-434, 1987-08-25

被引用文献数

1

---

In the method of stochastic quantization proposed by Parisi and Wu, the Langevin equation is set by using an additional fictitious time. The results of the usual quantization are obtained by taking the infinite limit of the time. For a system with a special class of potential, however, it is also possible to formulate the stochastic quantization based on the Langevin equation associated with the ordinary time. Applying this method, we investigate the stochastic quantization of the open-ends Nambu-Goto string. It is shown that the effective action derived out of the Langevin equation of the string has the form of a supersymmetric string, though the fermionic degrees of freedom are ghost variables.

著者

Kamimura Kiyoshi

出版者

一般社団法人日本物理学会

雑誌

Progress of theoretical physics (ISSN:0033068X)

巻号頁・発行日

vol.65, no.5, pp.1704-1718, 1981-05-25

---

A set of models of extended objects in space-time is studied using geometrical language. They are natural generalization of the relativistic point particle to extended objects in Minkowski space. The relativistic string model is one of the examples and its properties are studied in some detail. The time like oscillation mode, which gives rise to ghost state in quantum theory, is always suppressed by the geometrical construction in this approach.

著者

Kamo Hideki Sohkawa Tohru

出版者

一般社団法人日本物理学会

雑誌

Progress of theoretical physics (ISSN:0033068X)

巻号頁・発行日

vol.57, no.5, pp.1749-1760, 1977-05-25

被引用文献数

1

---

A possible theory of an open membrane is proposed. The space-time coordinates, swept out by the membrane, are denoted as X^μ(σ^0,σ^1, σ^2) where σ^a are parameters. A simple Lagrangian which is invariant under the re-parametrization σ^0→σ^0'(σ), σ^1'=σ^1 and σ^2'=σ^2 is set up and the equations of motion and the boundary conditions are derived. After the gauge is fixed, they are solved in the case where the membrane rotates rigidly and the mass-spin relation is obtained which is not infinitely increasing.

著者

Ruggeri T. Strumia A.

出版者

一般社団法人日本物理学会

雑誌

Progress of theoretical physics (ISSN:0033068X)

巻号頁・発行日

vol.59, no.6, pp.2121-2132, 1978-06-25

被引用文献数

5

---

Euler-Lagrange equations of a relativistic massive string are analysed from the stand-point of non-linear wave propagation theory. Complete exceptionality is shown to hold, while strict exceptionality (usual in non-linear physical theories) appears only for non-vanishing value of the masses at the ends, when time-like or light-like gauge specification is employed.

著者

Takabayasi Takehiko

出版者

一般社団法人日本物理学会

雑誌

Progress of theoretical physics (ISSN:0033068X)

巻号頁・発行日

vol.52, no.6, pp.1910-1928, 1974-12-25

被引用文献数

9

---

Theory of "geometric" string, recently employed as a model of hadrons, is represented in a form covariant under general transformation of parameters ("coordinates") by the aid of tensor analysis. It is shown that this approach is essentially simple and transparent and works to clarify subtle points in the relativistic kinematics and mechanics of the geometric string. The method is applied to the treatment of conformal invariance, "static solutions" and single-time formalism. Relativistic string with intrinsic rotational degrees is presented, also on the basis of the general-covariant approach. This new model allows a charge distribution along the string. Analogy of the "general-covariant" string theory to general relativity as well as its distinction therefrom is explained.

著者

TAKABAYASHI Takehiko

出版者

一般社団法人日本物理学会

雑誌

Progress of theoretical physics (ISSN:0033068X)

巻号頁・発行日

vol.44, no.5, pp.1429-1430, 1970-11-25

被引用文献数

9

著者

Yasue Kunio Department of Physics Kyoto University

出版者

Published for the Research Institute for Fundamental Physics by Physical Society of Japan

雑誌

Progress of Theoretical Physics (ISSN:0033068X)

巻号頁・発行日

vol.57, no.1, pp.p318-328, 1977-01

被引用文献数

12

---

Assuming that the space-time consists of elementary domains proposed by Yukawa, we attempt to extend the stochastic quantization procedures introduced by Nelson in the non-relativistic case to the relativistic one. In our view, the conventional Minkowski structure of space-time is to reflect the macroscopic property, so that it may be derived from our stochastic formulation as its continuum limit. The relativistic wave equation is set up to describe the behavior of successive inter-elementary-domain transitions of an excitation. It is found that the equation is of the Fock-Nambu-Feynman type.

著者

Ziro KOBA Takao TANI Sin-ichiro TOMONAGA

出版者

THE PHYSICAL SOCIETY OF JAPAN

雑誌

Progress of Theoretical Physics (ISSN:0033068X)

巻号頁・発行日

vol.2, no.4, pp.198-208, 1947 (Released:2006-03-27)

参考文献数

5

被引用文献数

18

著者

Abe Hiroyuki Higaki Tetsutaro Kobayashi Tatsuo

出版者

一般社団法人日本物理学会

雑誌

Progress of theoretical physics (ISSN:0033068X)

巻号頁・発行日

vol.109, no.5, pp.809-830, 2003-05-25

被引用文献数

16

---

We systematically study VEVs of a gauge scalar field Σ in a bulk U(1) vector multiplet and scalar fields in brane/bulk hypermultiplets charged under U(1)in the 5D S^1/Z_2 orbifold model with generic FI terms. A non-trivial VEV of Σ generates bulk mass terms for U(1) charged fields, and their zero modes have non-trivial profiles. In particular, in the SUSY- breaking case, bosonic and fermionic zero modes have Gaussian profiles. Such non-trivial profiles are useful to explain hierarchical couplings. A toy model for SUSY breaking is studied, and it yields sizable D-term contributions to scalar masses. Because the overall magnitude of D-term contributions is the same everywhere in the bulk and also on both branes, we have to take into account these contributions and other SUSY-breaking terms to obtain a realistic description. We also give profiles and mass eigenvalues of higher modes.

著者

KOBA Z. TOMONAGA S.

出版者

一般社団法人日本物理学会

雑誌

Progress of Theoretical Physics (ISSN:0033068X)

巻号頁・発行日

vol.2, no.3, 1947-12

被引用文献数

1 4

著者

NAKAMURA Tadas K.

出版者

一般社団法人日本物理学会

雑誌

Progress of theoretical physics (ISSN:0033068X)

巻号頁・発行日

vol.128, no.3, pp.463-475, 2012-09-25

参考文献数

25

被引用文献数

17

---

It has been shown three different views in relativistic thermodynamics can be derived from the basic formulation proposed by van Kampen and Israel. The way to decompose energy-momentum into work and heat is not uniquely determined; the different choices result in different views. Also the definition of three dimensional volume causes ambiguity of thermodynamical quantities. The present paper shows various theories are obtained depending on the choice of these two factors.

著者

MATSUI T. Institute of Physics University of Tokyo

出版者

Publication Office, Progress of Theoretical Physics

雑誌

Progress of theoretical physics (ISSN:0033068X)

巻号頁・発行日

vol.126, no.6, pp.1167-1176, 2011-12-25

参考文献数

21

被引用文献数

5

---

We calculate the relative abundance of the radioactive isotopes Iodine-131 and Cesium-137 produced by nuclear fission in reactors and compare it with data taken at the troubled Fukushima Dai-ichi nuclear power plant. The ratio of radioactivities of these two isotopes can be used to obtain information about when the nuclear reactions terminated.