Atomic Parity Violation, Leptoquarks, and Contact Interactions

Details Atomic Parity Violation, Leptoquarks, and Contact Interactions Atomic Parity Violation, Leptoquarks, and Contact Interactions

2000-02-24

arxiv.org/abs/hep-ph/0002259v4

Phys.Lett.B480:149-154,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

published version, some discussions added

Scientific paper

10.1016/S0370-2693(00)00401-9

The recent measurement of atomic parity violation in cesium atoms shows a $2.3\sigma$ deviation from the standard model prediction. We show that such an effect can be explained by four-fermion contact interactions with specific chiralities or by scalar leptoquarks which couple to the left-handed quarks. For a coupling of electromagnetic strength, the leptoquark mass is inferred to be 1.1 to 1.3 TeV. We also show that these solutions are consistent with all other low-energy and high-energy neutral-current data.

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