Constraints on two-lepton, two quark operators
Abstract
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.
Keywords
Cite
@article{arxiv.1008.0280,
title = {Constraints on two-lepton, two quark operators},
author = {Michael Carpentier and Sacha Davidson},
journal= {arXiv preprint arXiv:1008.0280},
year = {2010}
}
Comments
Modified presentation (to constrain coefficients of four fermion interactions, rather than gauge invariant operators), some numbers corrected, and minor changes. 28 pages, 18 tables