High sensitivity to variation in the proton-to-electron mass ratio in O2+

被引:30
作者
Hanneke, D. [1 ]
Carollo, R. A. [1 ]
Lane, D. A. [1 ]
机构
[1] Amherst Coll, Dept Phys & Astron, Amherst, MA 01002 USA
基金
美国国家科学基金会;
关键词
IONIZATION PHOTOELECTRON BANDS; RESOLUTION PHOTOFRAGMENT SPECTROSCOPY; ENERGY-RANGE; CONSTANTS; LIFETIMES; SYSTEM; STATES;
D O I
10.1103/PhysRevA.94.050101
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Molecular vibrational transitions are prime candidates for model-independent searches for variation of the proton-to-electron mass ratio. Searches for present-day variation achieve the highest sensitivity with deep molecular potentials. We identify several high-sensitivity transitions in the deeply bound O-2(+) molecular ion. These transitions are electric-dipole forbidden and have narrow linewidths. The most sensitive transitions take advantage of an accidental degeneracy between vibrational states in different electronic potentials. We suggest experimentally feasible routes to a measurement with uncertainty below current limits on present-day variation in m(p)/m(e).
引用
收藏
页数:6
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