Electromagnetic dipole moment and time reversal invariance violating interactions for high energy short-lived particles in bent and straight crystals at Large Hadron Collider

Abstract

A channelled particle, which moves in a crystal, alongside with electromagnetic interaction also experiences weak interaction with electrons and nuclei, as well as strong interaction with nuclei. Measurements of polarization vector and angular distribution of particles scattered by axes (planes) of unbent crystal enable to obtain limits for the EDM value and for values of constants describing P- and T-odd interactions. The same measurements also allow studying magnetic dipole moment of charged and neutral particles. Investigation of left-right asymmetry by the use of two unbent crystals makes it possible to measure EDM, MDM and other constants without studying the angular distribution of decay products of scattered particles: it is sufficient to measure the intensity of flow of particles experienced double scattering. Spin precession of channelled particles in bent crystals at the LHC gives unique possibility for measurement of constants determining T-odd, P-odd (CP) violating interactions and P-odd, T-even interactions of baryons with electrons and nucleus (nucleons), similarly to the possibility of measuring electric and magnetic moments of charm, beauty and strange charged baryons. Methods to separate P-noninvariant rotation from the MDM- and EDM-induced (T-odd) spin rotations are discussed.

arXiv comment24 pages, 4 eps figures, to be published in Physical Review Special Topics - Accelerators and Beams, presented at The 8th International Conference Channeling 2018: Charged & Neutral Particles Channeling Phenomena. arXiv admin note: text overlap with arXiv:1803.05770

References in corpus (8)

• Electric Dipole Moments of the Atoms, Molecules, Nuclei and Particles
• Electromagnetic dipole moments of charged baryons with bent crystals at the LHC
• On the search for the electric dipole moment of strange and charm baryons at LHC
• Feasibility of measuring the magnetic dipole moments of the charm baryons at the LHC using bent crystals
• Novel method for the direct measurement of the tau lepton dipole moments
• Feasibility of tau lepton electromagnetic dipole moments measurement using bent crystal at the LHC
• On the CP-odd Nucleon Potential
• Tensor polarization of deuterons passing through matter

Cited by in corpus (5)

• Progress towards the first measurement of charm baryon dipole moments
• Search for electric dipole moment
• Improved experimental layout for dipole moment measurements at the LHC
• Study of electromagnetic dipole moment, electric quadrupole moment and weak T-odd (CP-odd) interactions of high energy short-lived particles in straight crystals
• Electromagnetic dipole, quadrupole moments and parity and time reversal invariance interactions of ${\Omega }^{\pm }$ baryons in bent and straight crystals