Constraints on two-lepton, two quark operators

Details Constraints on two-lepton, two quark operators Constraints on two-lepton, two quark operators

2010-08-02

arxiv.org/abs/1008.0280v2

Eur.Phys.J.C70:1071-1090,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

Modified presentation (to constrain coefficients of four fermion interactions, rather than gauge invariant operators), some nu

Scientific paper

10.1140/epjc/s10052-010-1482-4

Physics from beyond the Standard Model, such as leptoquarks, can induce four fermion operators involving a quark, an anti-quark, a lepton and an anti-lepton. We update the (flavour dependent) constraints on the coefficients of such interactions, arising from collider searches for contact interactions, meson decays and other rare processes. We then make naive estimates for the magnitude of the coefficients, as could arise in texture models or from inverse hierarchies in the kinetic term coefficients. These estimates suggest that rare Kaon decays could be a good place to look for such operators.

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