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- W2951507029 abstract "We show that FCNC processes are unavoidable for leptoquarks that couple to left handed quarks, and derive new FCNC bounds from neutral meson mixing. Despite being induced only at one loop, these processes lead to significant bounds since the leptoquark contributions do not suffer from GIM cancellations. Studying the implications of these bounds we find that (i) The D-Dbar mixing bound is the first significant FCNC bound from the up sector. Combining it with FCNC bounds from the down sector we arrive at a bound on the first generation couplings. (ii) The K-Kbar and D-Dbar mixings bound g^2/M while all other processes bound g/M. The combined neutral meson mixing bound is therefore dominant for the heavier leptoquarks, and leads to exclusion of large regions in parameter space which were previously allowed." @default.
- W2951507029 created "2019-06-27" @default.
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- W2951507029 date "1993-09-19" @default.
- W2951507029 modified "2023-09-27" @default.
- W2951507029 title "New Bounds on Leptoquarks" @default.
- W2951507029 hasPublicationYear "1993" @default.
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