Axion-like Relics: New Constraints from Old Comagnetometer Data

by Dr. Itay Bloch

Tel Aviv University

at Particles and Fields Seminar

Mon, 19 Oct 2020, 14:00
Zoom

Abstract

The noble-alkali comagnetometer, developed in recent years, has been shown to be a very accurate measuring device of anomalous magnetic-like fields. An ultra-light relic axion-like particle can source an anomalous field that permeates space, allowing for its detection by comagnetometers. Here we derive new constraints on relic axion-like particles interaction with neutrons and electrons from old comagnetometer data. We show that the decade-old experimental data place the most stringent terrestrial constraints to date on ultra-light axion-like particles coupled to neutrons. The constraints are comparable to those from stellar cooling, providing a complementary probe. Future planned improvements of comagnetometer measurements through altered geometry, constituent content and data analysis techniques could enhance the sensitivity to axion-like relics coupled to nucleons or electrons by many orders of magnitude. The talk is based on 1907.03767, but new updates on the recent experiments that have been performed, and a few that will be performed in the near future, will also be given.

Zoom details:
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Meeting ID: 874 8526 2910
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Created on 07-10-2020 by Palti, Eran (palti)
Updaded on 15-10-2020 by Palti, Eran (palti)