Publications
Publication Information
| Title | A test of local Lorentz invariance with Compton scattering asymmetry |
| Authors | Prajwal MohanMurthy, Amrendra Narayan, Dipangkar Dutta |
| JLAB number | JLAB-PHY-16-2362 |
| LANL number | arXiv:1611.09173 |
| Other number | DOE/OR/23177-4042 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
| Other Funding: | FG02-07ER41528 |
|
Journal Compiled for Modern Physics Letters A Volume 31 Issue 38 Page(s) 1650220 (11 pages) Refereed | |
| Publication Abstract: | We report on a measurement of the constancy and anisotropy of the speed of light relative to the electrons in photon-electron scattering. We used the Compton scattering asymmetry measured by the new Compton polarimeter in Hall~C at Jefferson Lab to test for deviations from unity of the vacuum refractive index ($n$). For photon energies in the range of 9 - 46 MeV, we obtain a new limit of $1-n < 1.4 \times 10^{-8}$. In addition, the absence of sidereal variation over the six month period of the measurement constrains any anisotropies in the speed of light. These constitute the first study of Lorentz invariance using Compton asymmetry. Within the minimal standard model extension framework, our result yield limits on the photon and electron coefficients $\tilde{\kappa}_{0^+}^{YZ}, c_{TX}, \tilde{\kappa}_{0^+}^{ZX}$, and $c_{TY}$. Although, these limits are several orders of magnitude larger than the current best limits, they demonstrate the feasibility of using Compton asymmetry for tests of Lorentz invariance. Future parity violating electron scattering experiments at Jefferson Lab will use higher energy electrons enabling better constraints. |
| Experiment Numbers: | |
| Group: | Hall C |
| Document: | |
| DOI: | http://dx.doi.org/10.1142/S0217732316502205 |
| Accepted Manuscript: | 1611.09173v1.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |