Pump-probe measurement of atomic parity violation in caesium with a precision of 2.6%

Autor: Michel Lintz, J. Guena, Marie-Anne Bouchiat
Přispěvatelé: Laboratoire Kastler Brossel (LKB (Lhomond)), Université Pierre et Marie Curie - Paris 6 (UPMC)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2007
Předmět:
Nuclear and High Energy Physics
Atomic Physics (physics.atom-ph)
Magnetic dipole transition
Stark effect
FOS: Physical sciences
chemistry.chemical_element
Pump probe
Linear dichroism
01 natural sciences
7. Clean energy
Physics - Atomic Physics
010305 fluids & plasmas
Physics - General Physics
Electric field
0103 physical sciences
Polarization-tilt magnifier
weak charge
Highly forbidden transition
010306 general physics
Laser beams
Physics
PACS: 32.80.Ys
11.30.Er
33.55.-b
Asymmetry Amplification by stimulated emission
Atomic Parity Violation
[PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph]
Parity (physics)
[PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph]
General Physics (physics.gen-ph)
chemistry
Caesium
Atomic physics
weak interaction in atoms
Excitation
Zdroj: European Physical Journal A
European Physical Journal A, EDP Sciences, 2007, 32 (4), pp.525-529. ⟨10.1140/epja/i2006-10433-9⟩
European Physical Journal A, 2007, 32 (4), pp.525-529. ⟨10.1140/epja/i2006-10433-9⟩
ISSN: 1434-6001
1434-601X
DOI: 10.1140/epja/i2006-10433-9⟩
Popis: We present the atomic parity violation measurements made in Cs vapour using a pump-probe scheme. After pulsed excitation of the 6S-7S forbidden transition in the presence of a longitudinal electric field, a laser beam resonant with one of the 7S-6P transitions stimulates the 7S atom emission for a duration of 20 ns. The polarisation of the amplified probe beam is analysed. A seven-fold signature allows discrimination of the parity violating linear dichroism, and real-time calibration by a similar, known, parity conserving linear dichroism. The zero-field linear dichroism signal due to the magnetic dipole transition moment is observed for the first time, and used for in-situ determination of the electric field. The result, ImE1^{pv}= (-808+/- 21) 10^{-14} ea\_{0}, is in perfect agreement with the corresponding, more precise measurement obtained by the Boulder group. A transverse field configuration with large probe amplification could bring atomic parity violation measurements to the 0.1% accuracy level.
"conference PAVI 06, Milos, Greece, May 2006"
Databáze: OpenAIRE
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