CeNTREX: a new search for time-reversal symmetry violation in the <sup>205</sup> Tl nucleus
Olivier Grasdijk, Oskari Timgren, Jakob Kastelic, Trevor Wright, S. K. Lamoreaux, D. DeMille, Konrad Wenz, Michael D. Aitken, Tanya Zelevinsky, Tristan Winick, D. Kawall
Abstract
Abstract The Cold molecule Nuclear Time-Reversal EXperiment (CeNTREX) is a new effort aiming for a significant increase in sensitivity over the best present upper bounds on the strength of hadronic time reversal ( T ) violating fundamental interactions. The experimental signature will be shifts in nuclear magnetic resonance frequencies of 205 Tl in electrically-polarized thallium fluoride (TlF) molecules. Here we describe the motivation for studying these T -violating interactions and for using TlF to do so. To achieve higher sensitivity than earlier searches for T -violation in TlF, CeNTREX uses a cryogenic molecular beam source, optical state preparation and detection, and modern methods of coherent quantum state manipulation. Details of the measurement scheme and the current state of the apparatus are presented, with quantitative measurements of the TlF beam. Finally, the estimated sensitivity and methods to control systematic errors are discussed.