2024-03-28T20:25:48Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/424272017-10-03T08:42:22Zcom_10261_61com_10261_4col_10261_440
2011-11-14T13:15:04Z
urn:hdl:10261/42427
New physics bounds from the combination of CKM-unitaryand high energy data
González-Alonso, Martín
Comunicación presentada en Topical Workshop on Low Energy Constraints on Extensions of the Standard Model. Kazimierz (POLAND). JUL 23-27, 2009
Through 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.
2011-11-14T13:15:04Z
2011-11-14T13:15:04Z
2009
comunicación de congreso
Acta Physica Polonica - Series B Elementary Particle Physics-Proceedings Supplement 3 (1): 159-164 (2009)
1899-2358
http://hdl.handle.net/10261/42427
eng
openAccess
Jagiellonian University