TY - JOUR

T1 - Parity-Violation Studies with Partially Stripped Ions

AU - Richter, Jan

AU - Maiorova, Anna V.

AU - Viatkina, Anna V.

AU - Budker, Dmitry

AU - Surzhykov, Andrey

N1 - Funding Information: The authors are grateful for helpful discussions with Mieczyslaw Witold Krasny and Mikhail Kozlov. This work was funded by the Russian Science Foundation (Grant No. 19‐12‐00157), the GFK‐Fellowship (JGU Mainz), and under Germany's Excellence Strategy–EXC‐2123 QuantumFrontiers–390837967. The work at Mainz was supported by the Deutsche Forschungsgemeinschaft (DFG) ‐ Project ID 423116110 and by the Cluster of Excellence Precision Physics, Fundamental Interactions, and Structure of Matter (PRISMA+ EXC 2118/1) funded by the DFG within the German Excellence Strategy (Project ID 39083149).

PY - 2022/3/8

Y1 - 2022/3/8

N2 - A theoretical study of photoexcitation of highly charged ions from their ground states, a process which can be realized at the Gamma Factory at CERN, is presented. Special attention is paid to the question of how the excitation rates are affected by the mixing of opposite-parity ionic levels, which is induced both by an external electric field and the weak interaction between electrons and the nucleus. In order to reinvestigate this “Stark-plus-weak-interaction” mixing, well-known in neutral atomic systems, we employ relativistic Dirac theory. Based on the developed approach, detailed calculations are performed for the 1s (Formula presented.) 2s1/2 and (Formula presented.) (M1 + parity–violating–E1) transitions in hydrogen- and lithium-like ions, respectively. In particular, we focus on the difference between the excitation rates obtained for the right- and left-circularly polarized incident light. This difference arises due to the parity violating mixing of ionic levels and is usually characterized in terms of the circular–dichroism parameter. We argue that future measurements of circular dichroism, performed with highly charged ions in the SPS or LHC rings, may provide valuable information on the electron–nucleus weak–interaction coupling.

AB - A theoretical study of photoexcitation of highly charged ions from their ground states, a process which can be realized at the Gamma Factory at CERN, is presented. Special attention is paid to the question of how the excitation rates are affected by the mixing of opposite-parity ionic levels, which is induced both by an external electric field and the weak interaction between electrons and the nucleus. In order to reinvestigate this “Stark-plus-weak-interaction” mixing, well-known in neutral atomic systems, we employ relativistic Dirac theory. Based on the developed approach, detailed calculations are performed for the 1s (Formula presented.) 2s1/2 and (Formula presented.) (M1 + parity–violating–E1) transitions in hydrogen- and lithium-like ions, respectively. In particular, we focus on the difference between the excitation rates obtained for the right- and left-circularly polarized incident light. This difference arises due to the parity violating mixing of ionic levels and is usually characterized in terms of the circular–dichroism parameter. We argue that future measurements of circular dichroism, performed with highly charged ions in the SPS or LHC rings, may provide valuable information on the electron–nucleus weak–interaction coupling.

KW - atomic parity violation

KW - circular dichroism

KW - partially stripped ions

KW - photoexcitation

UR - http://www.scopus.com/inward/record.url?scp=85124041800&partnerID=8YFLogxK

U2 - 10.1002/andp.202100561

DO - 10.1002/andp.202100561

M3 - Article

AN - SCOPUS:85124041800

VL - 534

JO - Annalen der Physik

JF - Annalen der Physik

SN - 0003-3804

IS - 3

M1 - 2100561

ER -