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arXiv 0801.1957hep-th
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一个产物为稳定快子时两体衰变的相空间因子

Phase Space Factor for Two-Body Decay if One Product is a Stable Tachyon

Marek J. Radzikowski

摘要:

我们计算了其中一个产物是快子的两体衰变的相空间因子。两个阈值条件,一个较低的和一个较高的,来自在粒子的质量和速度的首选帧。隐含在推导是一个一贯制定的量子场论的快子自发洛伦兹对称性破缺发生。这一结果与休斯和斯蒂芬森的平行计算形成了对比,然而,休斯和斯蒂芬森的平行计算隐含地坚持了基础量子场论的严格洛伦兹不变性,并得出了这个过程没有阈值的结论。

英文摘要:

We calculate the phase space factor for a two-body decay in which one of the products is a tachyon. Two threshold conditions, a lower and an upper one, are derived in terms of the masses of the particles and the speed of a preferred frame. Implicit in the derivation is a consistently formulated quantum field theory of tachyons in which spontaneous Lorentz symmetry breaking occurs. The result is to be contrasted with a parallel calculation by Hughes and Stephenson, which, however, implicitly adheres to strict Lorentz invariance of the underlying quantum field theory and produces the conclusion that there is no threshold for this process.

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