Constraint On A Varying Proton-Electron Mass Ratio 1.5 Billion Years After The Big Bang
PHYSICAL REVIEW LETTERS(2015)
摘要
A molecular hydrogen absorber at a lookback time of 12.4 billion years, corresponding to 10% of the age of the Universe today, is analyzed to put a constraint on a varying proton- electron mass ratio, mu. A high resolution spectrum of the J1443+2724 quasar, which was observed with the Very Large Telescope, is used to create an accurate model of 89 Lyman and Werner band transitions whose relative frequencies are sensitive to mu, yielding a limit on the relative deviation from the current laboratory value of Delta mu/mu= (- 9.5 +/- 5.4(stat) +/- 5.3(syst)) x 10(-6).
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要