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New physics bounds from the combination of CKM-unitaryand high energy data

AuthorsGonzález-Alonso, Martín
Issue Date2009
PublisherJagiellonian University
CitationActa Physica Polonica - Series B Elementary Particle Physics-Proceedings Supplement 3 (1): 159-164 (2009)
AbstractThrough an effective field theory approach, we analyse the new physics (NP) corrections to muon and beta decays and their effects on the extractions of V(ud) and V(us). Assuming nearly flavour blind NP interactions, we find that the only quantity sensitive to NP is Delta(CKM) equivalent to vertical bar V(ud)vertical bar(2) + vertical bar V(us)vertical bar(2) + vertical bar V(ub)vertical bar(2) - 1, that receives contributions from four short distance operators. The phenomenological bound Delta(CKM) = (-1 +/- 6) x 10(-4) provides strong constraints on all four operators, corresponding to an effective scale Lambda > 11 TeV (90% C.L.). Depending on the operator, this constraint is at the same level or better than that generated by the Z pole observables.
DescriptionComunicación presentada en Topical Workshop on Low Energy Constraints on Extensions of the Standard Model. Kazimierz (POLAND). JUL 23-27, 2009
Appears in Collections:(IFIC) Comunicaciones congresos
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