Nuclear Spin-Dependent Effects of Parity Nonconservation in Ortho-H₂

• Main Authors: Dmitry V. Chubukov, Leonid V. Skripnikov, Leonti N. Labzowsky, Günter Plunien
• Format: Article
• Language: English
• Published: MDPI AG 2020-01-01
• Series: Symmetry
• Subjects: parity nonconservation; orthohydrogen molecule; weak neutral currents
• Online Access: https://www.mdpi.com/2073-8994/12/1/141

We report a theoretical treatment of the nuclear spin-dependent spatial parity nonconserving (NSD-PNC) electron&#8722;nuclear interaction effect in the diatomic homonuclear ortho-H<inline-formula> <math display="inline"> <semantics> <msub> <mrow></mrow> <mn>2</mn> </msub> </semantics> </math> </inline-formula> molecule. The magnetic dipole transition between <inline-formula> <math display="inline"> <semantics> <mrow> <mi>v</mi> <mo>=</mo> <mn>1</mn> </mrow> </semantics> </math> </inline-formula> and <inline-formula> <math display="inline"> <semantics> <mrow> <mi>v</mi> <mo>=</mo> <mn>0</mn> </mrow> </semantics> </math> </inline-formula> vibrational sublevels of the ground <inline-formula> <math display="inline"> <semantics> <mrow> <msup> <mrow></mrow> <mn>1</mn> </msup> <msubsup> <mi mathvariant="sans-serif">&#931;</mi> <mi>g</mi> <mo>+</mo> </msubsup> </mrow> </semantics> </math> </inline-formula> state is examined. The orthohydrogen molecule is a unique molecular system where the parity nonconserving (PNC) nuclear spin-dependent interaction due to the neutral weak currents can be directly observed and the corresponding coupling constant can be extracted from the future experiments. The theoretical simulation shows that using the cavity-enhanced scheme in conjunction with the record achievement of the intracavity absorption spectroscopy, the experiment on the observation of the NSD-PNC effect due to the neutral weak current in ortho-H<inline-formula> <math display="inline"> <semantics> <msub> <mrow></mrow> <mn>2</mn> </msub> </semantics> </math> </inline-formula> looks feasible.