Electroweak Interaction and Baryogenesis

电弱相互作用和重子发生

• 批准号: 09640378
• 负责人: TOYODA Fumihiko
• 金额: $ 1.02万
• 依托单位: Kinki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640378/
• 关键词: transitional CP violation; baryogenesis; bubble wall; Spontaneous CP Violation; Baryogenesis; Bubble Wall

Electroweak baryogenesis depends on the profile of the bubble wall created in the first-order phase transition. It was pointed out that CP violation on the bubble wall(transitional CP violation) could become large enough to explain the baryon asymmetry of the universe(BAU). The profile of the bubble wall with CP violation is controlled by the effective potential of the two Higgs doublets in the minimal supersymmetric model(MSSM). We pointed out that the transitional CP violation really occurs by solving the equations of motion for the Higgs fieldswith the one loop effective potential at the transition temperature Tc.This type of CF violation exists only in the intermediate region between symmetric and broken phases separated by the bubble wall and never contradicts the experimental bounds on CP violation.We also showed that a tiny explicit CP violation1 which is consistent with the present bound on the neutron EDM, does nonperturbatively resolve the degeneracy between the CF-conjugate pair of bubbles to leave a sufficient BAU after the phase transition.We must stress that CF symmetry is fundamentally good and the transitional CP violation to contribute BAU is enhanced by a tiny explicit CP violation.

电弱重子生成取决于一级相变中产生的气泡壁的轮廓。有人指出，气泡壁上的CP破坏（过渡CP破坏）可能变得足够大，足以解释宇宙的重子不对称性（BAU）。 CP破坏的气泡壁轮廓由最小超对称模型（MSSM）中两个希格斯双峰的有效势控制。我们指出，通过求解在转变温度 Tc 下具有单循环有效势的希格斯场的运动方程，实际上会发生过渡 CP 破坏。这种类型的 CF 破坏仅存在于对称相和破碎相之间的中间区域，该中间区域由气泡壁，并且从不与 CP 破坏的实验界限相矛盾。我们还表明，与中子 EDM 的当前边界一致的微小显式 CP 破坏 1 确实能非微扰地解决 CF 共轭之间的简并性一对气泡在相变后留下足够的 BAU。我们必须强调 CF 对称性本质上是好的，并且通过微小的显式 CP 破坏增强了贡献 BAU 的过渡 CP 破坏。

项目成果

船久保公一, 角籐 亮, 大槻昭一郎, 豊田文彦: "CP-Violating Bubble Wall and Electroweak Baryogenesis" Progress of Theoretical Physics. Vol.98 No.2. 427-442 (1997)

Koichi Funakubo、Ryo Kakuto、Shoichiro Otsuki、Fumihiko Toyoda：“CP 破坏气泡壁和电弱重子发生”理论物理进展第 98 卷第 427-442 期。

船久保公一, 豊田文彦: "CP-Violating Bubble Wall and Electroweak Baryogenesis" Progress of Theoretical Physics. 98-2. 427-442 (1997)

Koichi Funakubo，Fumihiko Toyota：“CP 破坏气泡壁和电弱重子发生”理论物理进展 98-2（1997）。

Koichi Funakubo: "Higgs Mass, CP Violation and Phase Transition in the MSSM" Progress of Theoretical Physics. 101 (in press). (1999)

Koichi Funakubo：“MSSM 中的希格斯质量、CP 破坏和相变”理论物理进展。

K.Funakubo, A.Kakuto, S.Otsuki and F.Toyoda: "Spontaneous CP Violation at Finite Temperature in the MSSM" Progress of Theoretical Physics. 99-6. 1045-1068 (1998)

K.Funakubo、A.Kakuto、S.Otsuki 和 F.Toyoda：“MSSM 中有限温度下的自发 CP 破坏”理论物理进展。

船久保公一, 豊田文彦: "Spontaneous CP Violation at Finite Temperature in the MSSM" Progress of Theoretical Physics. 99-6. 1045-1068 (1998)

Koichi Funakubo、Fumihiko Toyota：“MSSM 中有限温度下的自发 CP 破坏”理论物理进展 99-6（1998）。