proton-electron mass ratioquintessenceRecent astrophysical observations of quasar absorption systems indicate that the fine structure constant u03b1 and the proton-electron mass ratio u03bc may have evolved through the history of the universe. Motivated by these observations, we consider the cosmological...
proton-to-electron-mass ratio 质子电子质量比相关短语 frequency conversion (电子的) 变频 gravity model method (电子运动) 重力模型法 Europe type (电子管) 欧洲式型号 spike (电子束焊的) 局部深熔,局部深熔 intensifier ring (电子束管) 增强环 pellet (激光或电子束的) 靶丸 quarter phase heating (电...
A new substantive proton to electron mass ratio constraint on rolling scalar field cosmologiesdoi:10.1093/mnras/stt355cosmological parameterscosmology: theorydark energyearly UniverseNew PKS 1830−211 radio frequency observations of methanol at a redshift of 0.885 82 have established the most ...
[11], assuming the dilaton coupling to dark matter and/or dark energy, the magnitude of the time variation of the fine structure constant is estimated. In this paper, we discuss time variations of the proton-electron mass ratio and the fine structure constant in the context of a dilat...
, where µ is the proton-to-electron mass ratio at the epoch of the QSO absorption spectrum formation and µ 0 is its contemporary value. In the framework of unified theories (e.g. SUSY GUT) with a common origin of the gauge fields, variations of the ...
On a possible variation of the proton-to-electron mass ratio: H2 spectra in the line of sight of high-redshift quasars and in the laboratoryOn a possible variation of the proton-to-electron mass ratio: H2 spectra in the line of sight of high-redshift quasars and in the laboratoryExperim...
Penning trap mass measurements of the deuteron and the HD+ molecular ion. Nature 585, 43–47 (2020). Article CAS PubMed ADS Google Scholar Kortunov, I. et al. Proton–electron mass ratio by high-resolution optical spectroscopy of ion ensembles in the resolved carrier regime. Nat. Phys. ...
This shows that the velocity of the electron is related to the velocity of the proton by their mass ratio. 4. Motion in a Magnetic Field: When charged particles move in a magnetic field, they experience a centripetal force that causes them to move in a circular path. The radius r of th...
What is the ratio of mass of an electron to the mass of a proton ? A1:2 B1:1 C1:1837 D1:3Submit The mass of a proton is A1.0073 a.m.u. B1.6726×10−27 kg Cboth a and b Dneither a nor bSubmit Mass of proton is A1.0000 amu B1.0073 amu C0.9073 amu D5.486×10−4 am...
4) electron mass 电子质量 1. The electron mass is measured, and the linewidth of the coherent scattering is analyzed. 测量了电子质量,分析了相干散射线宽,测量了非相干散射光子的能量,算出了非相干散射微分截面,给出了Θ~Θ+dΘ内散射光子微分截面与散射角关系。5) hydrogen to proton mass ratio ...