Dynamics of Nambu monopole in two Higgs doublet models. Cosmological Monopole Collider

Minoru Eto, Yu Hamada, Masafumi Kurachi, Muneto Nitta

研究成果: Article査読

16 被引用数 (Scopus)


We study the dynamics of the Nambu monopole in two Higgs doublet models, which is a magnetic monopole attached by two topological Z strings (Z flux tubes) from two opposite sides. The monopole is a topologically stable solution of the equation of motions when the Higgs potential has global U (1) and ℤ2 symmetries. In this paper, we consider more general cases without the ℤ2 symmetry, and find that it is no longer a static solution but moves along the Z string being pulled by the heavier string. After analytically constructing an asymptotic form of the monopole, we confirm such a motion using the numerical relaxation method. In addition, we analyze the real time dynamics of the monopole based on a point-like approximation. Consequently, if there were long string networks with the monopoles in the early universe, the monopole accelerates nearly to the speed of light emitting electromagnetic radiations as a synchrotron accelerator, and collides to an anti-monopole on the string. This collision event, which we call the cosmological monopole collider, can produce much heavier particles than those we can see today, e.g., at the Large Hadron Collider.

ジャーナルJournal of High Energy Physics
出版ステータスPublished - 2020 7月 1

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学


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