A test of local Lorentz invariance with Compton scattering asymmetry
Abstract
Here, we report on a measurement of the constancy and anisotropy of the speed of light relative to the electrons in photon-electron scattering. We also 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 $$c_{TY}$$. Though, 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. For future parity violating electron scattering experiments at Jefferson Lab we will use higher energy electrons enabling better constraints.
- Authors:
-
- Mississippi State Univ., Mississippi State, MS (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Mississippi State Univ., Mississippi State, MS (United States)
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Mississippi State Univ., Mississippi State, MS (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1338680
- Alternate Identifier(s):
- OSTI ID: 1599638
- Report Number(s):
- JLAB-PHY-16-2362; DOE/OR/23177-4042; arXiv:1611.09173
Journal ID: ISSN 0217-7323; TRN: US1701151
- Grant/Contract Number:
- AC05-06OR23177; FG02-07ER41528
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Modern Physics Letters A
- Additional Journal Information:
- Journal Volume: 31; Journal Issue: 38; Journal ID: ISSN 0217-7323
- Publisher:
- World Scientific Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Compton scattering; Lorentz invariance; vacuum refractive index
Citation Formats
Mohanmurthy, Prajwal, Narayan, Amrendra, and Dutta, Dipangkar. A test of local Lorentz invariance with Compton scattering asymmetry. United States: N. p., 2016.
Web. doi:10.1142/S0217732316502205.
Mohanmurthy, Prajwal, Narayan, Amrendra, & Dutta, Dipangkar. A test of local Lorentz invariance with Compton scattering asymmetry. United States. https://doi.org/10.1142/S0217732316502205
Mohanmurthy, Prajwal, Narayan, Amrendra, and Dutta, Dipangkar. Wed .
"A test of local Lorentz invariance with Compton scattering asymmetry". United States. https://doi.org/10.1142/S0217732316502205. https://www.osti.gov/servlets/purl/1338680.
@article{osti_1338680,
title = {A test of local Lorentz invariance with Compton scattering asymmetry},
author = {Mohanmurthy, Prajwal and Narayan, Amrendra and Dutta, Dipangkar},
abstractNote = {Here, we report on a measurement of the constancy and anisotropy of the speed of light relative to the electrons in photon-electron scattering. We also 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 $c_{TY}$. Though, 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. For future parity violating electron scattering experiments at Jefferson Lab we will use higher energy electrons enabling better constraints.},
doi = {10.1142/S0217732316502205},
journal = {Modern Physics Letters A},
number = 38,
volume = 31,
place = {United States},
year = {Wed Dec 14 00:00:00 EST 2016},
month = {Wed Dec 14 00:00:00 EST 2016}
}
Web of Science
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