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arXiv 0709.0414hep-th
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量子快子动力学

Quantum Tachyon Dynamics

H. M. Fried, Y. Gabellini

摘要:

这表明,具有极大质量M的带电快子不仅可以提供符合天体物理观测所需的暗物质,而且还可以为伽马射线暴和超高能宇宙射线提供解释。本文定义了快子的量子场论,快子是一种类似于普通轻子的粒子,但动量大于能量。该理论在完全CPT变换下是不变的,但分别违反了P和T不变性。微观因果关系在小于1/M的时空间隔中被打破,但在更大的间隔中被有效地保留。带电的费米子,而不是带电的标量快子被认为是为了尽量减少切伦科夫辐射的快子,从而允许高能量的快子保持其能量超过银河系的距离。处理的主题包括一个适当的拉格朗日,旋波函数,相关的格林函数,S-矩阵和生成功能的功能描述的选择和Schwinger作用原理的变化,以及各种有趣的运动学过程,包括光子发射和重吸收,以及相关的湮灭和散射效应。为了给带电快子在外电磁场中的经典描述提供一个基础,发展了一个版本的埃克塞特定理。应用程序,然后作出三个突出的天体物理难题:暗物质,伽马射线暴和超高能宇宙射线。

英文摘要:

It is suggested that charged tachyons of extremely large mass M could not only contribute to the dark matter needed to fit astrophysical observations, but could also provide an explanation for gamma ray bursts and ulta high energy cosmic rays. The present paper defines a quantum field theory of tachyons, particles similar to ordinary leptons, but with momenta larger than energy. The theory is invariant under the full CPT transformation, but separately violates P and T invariance. Micro causality is broken for space-time intervals smaller than 1/M, but is effectively preserved for larger separations. Charged fermionic, rather than charged scalar tachyons are considered in order to minimize the probability of Cerenkov-like radiation by the tachyon, thereby permitting a high energy tachyon to retain its energy over galactic distances. Topics treated include the choice and Schwinger Action Principle variations of an appropriate Lagrangian, spinorial wave functions, relevant Green's functions, a functional description of an S-Matrix and generating functional, and a variety of interesting kinematical processes, including photon emission and reabsorption, and relevant annihilation and scattering effects. A version of Ehrenfest's theorem is developed, in order to provide a foundation for a classical description of charged tachyons in an external electromagnetic field. Applications are then made to three outstanding astrophysical puzzles : dark matter, gamma ray bursts and ultra high energy cosmic rays.

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。

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