arXiv 0712.36692007-12-21hep-thhep-ph

超对称Q球的数值研究

Supersymmetric Q-balls: A Numerical Study

L. Campanelli, M. Ruggieri

备注：: 6 pages, 2 columns, 6 figures. To appear on Phys. Rev. D
发表信息：: Phys.Rev.D77:043504,2008
DOI：: 10.1103/PhysRevD.77.043504

摘要：

本文数值研究了一类非拓扑孤子Q球，它产生于标准模型的超对称扩展，具有低能规范介导的对称破缺。考虑到产生Q球的超对称势的确切形式，我们发现为了使它们经典稳定，电荷$Q$的值存在下限：$Q \gtrsim 5 \times 10^2 Q_{\rm cr}$，其中$Q_{\rm cr}$是常数，取决于定义势的参数，并且可以在$1 \lesssim Q_{\rm cr} \lesssim 10^{8 ÷16}$的范围内。如果$Q$是重子数，相对于衰变成质子的稳定性需要$Q \gtrsim 10^{17} Q_{\rm cr}$，而如果引力子质量大于$m_{3/2} \gtrsim 61 \MeV$，则不存在稳定的规范介导超对称Q球。最后，我们发现Q球的能量和半径可以参数化为$E \sim ξ_E Q^{3/4}$和$R \sim ξ_R Q^{1/4}$，其中$ξ_E$和$ξ_R$是电荷的慢变函数.

英文摘要：

We study numerically a class of non-topological solitons, the Q-balls, arising in supersymmetric extension of the Standard Model with low-energy, gauge-mediated symmetry breaking. % Taking into account the exact form of the supersymmetric potential giving rise to Q-balls, we find that there is a lower limit on the value of the charge $Q$ in order to make them classically stable: $Q \gtrsim 5 \times 10^2 Q_{\rm cr}$, where $Q_{\rm cr}$ is constant depending on the parameters defining the potential and can be in the range $1 \lesssim Q_{\rm cr} \lesssim 10^{8 ÷16}$.If $Q$ is the baryon number, stability with respect to the decay into protons requires $Q \gtrsim 10^{17} Q_{\rm cr}$, while if the gravitino mass is greater then $m_{3/2} \gtrsim 61 \MeV$, no stable gauge-mediation supersymmetric Q-balls exist. Finally, we find that energy and radius of Q-balls can be parameterized as $E \sim ξ_E Q^{3/4}$ and $R \sim ξ_R Q^{1/4}$, where $ξ_E$ and $ξ_R$ are slowly varying functions of the charge.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

摘要：

英文摘要：

相关论文