Ratchet baryogenesis and an analogy with the forced pendulum

被引：5

作者：

Bamba, Kazuharu ^{[1
]}

Barrie, Neil D. ^{[2
]}

Sugamoto, Akio ^{[3
,4
]}

Takeuchi, Tatsu ^{[5
]}

Yamashita, Kimiko ^{[3
,6
]}

机构：

[1] Fukushima Univ, Fac Symbiot Syst Sci, Div Human Support Syst, Fukushima 9601296, Japan

[2] Univ Sydney, ARC Ctr Excellence Particle Phys Terascale, Sch Phys, Sydney, NSW 2006, Australia

[3] Ochanomizu Univ, Grad Sch Humanities & Sci, Dept Phys, Bunkyo Ku, 2-1-1 Ohtsuka, Tokyo 1128610, Japan

[4] Open Univ Japan, Tokyo Bunkyo SC, Tokyo 1120012, Japan

[5] Virginia Tech, Dept Phys, Ctr Neutrino Phys, Blacksburg, VA 24061 USA

[6] Ochanomizu Univ, Program Leading Grad Sch, Bunkyo Ku, 2-1-1 Ohtsuka, Tokyo 1128610, Japan

来源：

MODERN PHYSICS LETTERS A | 2018年 / 33卷 / 17期

关键词：

Baryogenesis; reheating; Inflaton; ratchet model; forced rotating pendulum; PARTICLE-PRODUCTION; BARYON-NUMBER;

D O I：

10.1142/S0217732318500979

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A new scenario of baryogenesis via the ratchet mechanism is proposed based on an analogy with the forced pendulum. The oscillation of the inflaton field during the reheating epoch after inflation plays the role of the driving force, while the phase theta of a scalar baryon field (a complex scalar field with baryon number) plays the role of the angle of the pendulum. When the inflaton is coupled to the scalar baryon, the behavior of the phase theta can be analogous to that of the angle of the forced pendulum. If the oscillation of the driving force is adjusted to the pendulum's motion, a directed rotation of the pendulum is obtained with a nonvanishing value of (theta) over dot, which models successful baryogenesis since (theta) over dot is proportional to the baryon number density. Similar ratchet models which lead to directed motion have been used in the study of molecular motors in biology. There, the driving force is supplied by chemical reactions, while in our scenario this role is played by the inflaton during the reheating epoch.

引用

页数：13

共 23 条

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