Time-reversal symmetry violation in molecules induced by nuclear magnetic quadrupole moments.
Time-reversal symmetry violation in molecules induced by nuclear magnetic quadrupole moments.
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DOI：
10.1103/physrevlett.113.103003
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发表时间：
2014-06
影响因子：
8.6
通讯作者：
V. Flambaum;D. DeMille;Mikhail G. Kozlov
中科院分区：
文献类型：
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作者：
V. Flambaum;D. DeMille;Mikhail G. Kozlov
最近对顺磁分子的测量将电子电偶极矩(EDM)的极限提高了一个数量级。分子中的时间反转(T)和宇称(P)对称性破坏也可能来自它们的原子核。我们指出，在含有变形核的顺磁分子中，核T，P奇效应被放大，其中主要效应来自T，P奇核磁矩(MQM)。我们计算了Tan，THO，THf+，HfF+，YBF，HGF和Baf分子在MQM诱导下的T，P奇效应。我们将我们的结果与反磁TLF分子的结果进行了比较，在TLF分子中，T，P奇效应是由核Schiff矩产生的。我们认为，用MQM测量分子中的T，P奇数核力的强度，质子、中子和夸克的EDM，夸克的色散EDM，以及QCDθ项和违反CP的夸克相互作用的强度可以提供更好的限制。
Recent measurements in paramagnetic molecules improved the limit on the electron electric dipole moment (EDM) by an order of magnitude. Time-reversal (T) and parity (P) symmetry violation in molecules may also come from their nuclei. We point out that nuclear T, P-odd effects are amplified in paramagnetic molecules containing deformed nuclei, where the primary effects arise from the T, P-odd nuclear magnetic quadrupole moment (MQM). We perform calculations of T, P-odd effects in the molecules TaN, ThO, ThF+, HfF+, YbF, HgF, and BaF induced by MQMs. We compare our results with those for the diamagnetic TlF molecule, where the T, P-odd effects are produced by the nuclear Schiff moment. We argue that measurements in molecules with MQMs may provide improved limits on the strength of T, P-odd nuclear forces, on the proton, neutron, and quark EDMs, on quark chromo-EDMs, and on the QCD θ term and CP-violating quark interactions.