论文标题
通过镜像世界的中子 - 抗抗震动振荡的可能快捷方式
A possible shortcut for neutron-antineutron oscillation through mirror world
论文作者
论文摘要
中子 - 抗重物质量混合的现有界限，$ε_{n \ bar n} <{\ rm几个} \ times 10^{ - 24} $ ev，对$ n- \ bar n $过渡概率施加严重的上限10^{ - 18} $左右，其中$ t $是中子飞行时间。在这里，我们提出了一种新机制的$ n- \ bar n $过渡，这不是直接质量混合$ε_{n \ bar n} $引起的，但是由中子混合与镜子中子$ n'$和镜像antineutron $ \ bar $ \ bar {n}'$的假设状态介导。后者可以大于$ε_{nn'}，ε_{n \ bar {n}'} \ sim 10^{ - 15} $ ev左右，而无需与当前的实验限制和核稳定性结合。 $ n-n'$和$ n- \ bar {n}'$ transitions，$ p_ {nn'} $和$ p_ {n \ bar {n}'} $的概率取决于镜像扇区中的环境条件，并且可以通过应用正确值的磁场来弥补它们。这打开了$ n- \ bar n $的可能性，其概率$ p_ {n \ bar n} \ simeq p_ {nn'} p_ {n \ bar {n}'} $，可以达到值$ \ sim 10^{ - 8} $甚至更大的值。为了在实际实验中找到这种效果，不应抑制磁场，而应适当变化。这些混合物可以由新物理学在几个TEV的尺度上诱导，这也可能引发了普通和镜部门之间新的低尺度共同生成机制。
Existing bounds on the neutron-antineutron mass mixing, $ε_{n\bar n} < {\rm few} \times 10^{-24}$ eV, impose a severe upper limit on $n - \bar n$ transition probability, $P_{n\bar n}(t) < (t/0.1 ~{\rm s})^2 \times 10^{-18}$ or so, where $t$ is the neutron flight time. Here we propose a new mechanism of $n- \bar n$ transition which is not induced by direct mass mixing $ε_{n\bar n}$ but is mediated instead by the neutron mixings with the hypothetical states of mirror neutron $n'$ and mirror antineutron $\bar{n}'$. The latter can be as large as $ε_{nn'}, ε_{n\bar{n}'} \sim 10^{-15}$ eV or so, without contradicting present experimental limits and nuclear stability bounds. The probabilities of $n-n'$ and $n-\bar{n}'$ transitions, $P_{nn'}$ and $P_{n\bar{n}'}$, depend on environmental conditions in mirror sector, and they can be resonantly amplified by applying the magnetic field of the proper value. This opens up a possibility of $n-\bar n$ transition with the probability $P_{n\bar n} \simeq P_{nn'} P_{n\bar{n}'}$ which can reach the values $\sim 10^{-8} $ or even larger. For finding this effect in real experiments, the magnetic field should not be suppressed but properly varied. These mixings can be induced by new physics at the scale of few TeV which may also originate a new low scale co-baryogenesis mechanism between ordinary and mirror sectors.
