Enhanced sensitivity to time-variation of m_p/m_e in the inversion spectrum of ammonia
| dc.creator | Flambaum, V. V. | |
| dc.creator | Kozlov, M. G. | |
| dc.date | 2007-04-18 | |
| dc.date | 2007-04-19 | |
| dc.date.accessioned | 2026-07-07T11:56:37Z | |
| dc.date.available | 2026-07-07T11:56:37Z | |
| dc.description | We calculate the sensitivity of the inversion spectrum of ammonia to possible time-variation of the ratio of the proton mass to the electron mass, mu=m_p/m_e. For the inversion transition (lambda= 1.25 cm^{-1}) the relative frequency shift is significantly enhanced: delta(omega)/omega=-4.46, delta(mu)/mu. This enhancement allows one to increase sensitivity to the time-variation of mu using NH_3 spectra for high redshift objects. We use published data on microwave spectra of the object B0218+357 to place the limit delta(mu)/mu =(0.6 +/- 1.9) 10^{-6} at redshift z=0.6847; this limit is several times better than the limits obtained by different methods and may be significantly improved. Assuming linear time dependence we obtain dot{mu}/mu=(-1 +/- 3) 10^{-16} yr^{-1}. | |
| dc.identifier | https://arxiv.org/abs/0704.2301 | |
| dc.identifier | http://arxiv.org/abs/0704.2301 | |
| dc.identifier | Phys.Rev.Lett.98:240801,2007 | |
| dc.identifier | doi:10.1103/PhysRevLett.98.240801 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/205599 | |
| dc.subject | Astrophysics | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | Atomic Physics | |
| dc.subject | Space Physics | |
| dc.title | Enhanced sensitivity to time-variation of m_p/m_e in the inversion spectrum of ammonia | |
| dc.type | text |