Výsledky vyhledávání - "Mansour, A. J."

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Enhanced nuclear Schiff and electric dipole moments in nuclei with an octupole deformation

Deformed nuclei exhibit enhanced moments that violate time-reversal invariance ($T$) and parity ($P$). This paper focuses on the enhanced nuclear electric dipole moment (EDM) and Schiff moment present in nuclei with octupole deformation (pear-shaped

Externí odkaz: http://arxiv.org/abs/2411.18943

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Constraints on the Variation of Physical Constants, Equivalence Principle Violation, and a Fifth Force from Atomic Experiments

Autor: Dzuba, V. A., Flambaum, V. V., Mansour, A. J.

Publikováno v: Phys. Rev. D 110, 055022 2024

The aim of this paper is to derive limits on various forms of ``new physics'' using atomic experimental data. Interactions with dark energy and dark matter fields can lead to space-time variations of fundamental constants, which can be detected throu

Externí odkaz: http://arxiv.org/abs/2402.09643

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Variation of the quadrupole hyperfine structure and nuclear radius due to an interaction with scalar and axion dark matter

Autor: Flambaum, V. V., Mansour, A. J.

Publikováno v: Phys. Rev. Lett. 131, 113004 (2023)

Atomic spectroscopy is used to search for the space-time variation of fundamental constants which may be due to an interaction with scalar and pseudo-scalar (axion) dark matter. In this letter, we study the effects which are produced by the variation

Externí odkaz: http://arxiv.org/abs/2304.04469

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Enhanced Schiff and magnetic quadrupole moments in deformed nuclei and their connection to the search for axion dark matter

Autor: Dalton, F., Flambaum, V. V., Mansour, A. J.

Publikováno v: Phys. Rev. C 107, 035502 (2023)

Deformed nuclei possess enhanced moments violating time reversal invariance ($T$) and parity ($P$). Collective magnetic quadrupole moments (MQM) appear in nuclei with a quadrupole deformation (which have ordinary $T$,$P$-conserving collective electri

Externí odkaz: http://arxiv.org/abs/2302.00214

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Searching for scalar field dark matter with hyperfine transitions in alkali atoms

Autor: Flambaum, V. V., Mansour, A. J., Samsonov, I. B., Weitenberg, C.

Publikováno v: Phys. Rev. D 107 (2023) 1, 015008

Fundamental constants such as masses and coupling constants of elementary particles can have small temporal and spatial variations in the scalar field dark matter model. These variations entail time oscillations of other constants, such as the Bohr a

Externí odkaz: http://arxiv.org/abs/2210.08778

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Enhanced Magnetic Quadrupole Moments in Nuclei with Octupole Deformation and their CP-violating effects in molecules

Autor: Flambaum, V. V., Mansour, A. J.

Nuclei with an octupole deformation have a non-zero electric octupole moment, electric dipole moment (EDM), Schiff moment and magnetic quadrupole moment (MQM) in the intrinsic frame which rotates with the nucleus. In a state with definite angular mom

Externí odkaz: http://arxiv.org/abs/2204.01290

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Parity and Time Reversal Invariance Violation in Neutron-Nucleus Scattering

Autor: Flambaum, V. V., Mansour, A. J.

Parity violating (PV) as well as parity and time-reversal invariance violating (PTRIV) effects are enhanced a million times in neutron reactions near p-wave compound resonances. We present the calculation of such effects using a statistical theory ba

Externí odkaz: http://arxiv.org/abs/2111.02037

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