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Bounding effective operators at the one-loop level: the case of four-fermion neutrino interactions

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Bounding effective operators at the one-loop level: the case of four-fermion neutrino interactions

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dc.contributor.author Bilenky, Mikhail
dc.contributor.author Santamaria, Arcadi
dc.date.accessioned 2017-07-05T17:28:31Z
dc.date.available 2017-07-05T17:28:31Z
dc.date.issued 1994
dc.identifier.citation Bilenky, Mikhail Santamaria, Arcadi 1994 Bounding effective operators at the one-loop level: the case of four-fermion neutrino interactions Physics Letters B 336 1 91 99
dc.identifier.uri http://hdl.handle.net/10550/59353
dc.description.abstract The contributions of non-standard four-neutrino contact interactions to electroweak observables are considered at the one-loop level by using the effective quantum field theory language. The analysis is done in terms of three unknown parameters: the strength of the non-standard neutrino interactions, F , an additional derivative coupling needed to renormalize the divergent contributions that appear when the four-neutrino interactions are used at the loop level and a non-standard non-derivative Z-v¯v coupling. Then, the precise measurements of the invisible width of the Z-boson at LEP and the data on the neutrino deep-inelastic scattering yield the result F = (−100±140)GF. Assuming that there are no unnatural cancellations between the contributions of the three effective couplings a much stronger bound is obtained: |F | ≲ 2GF, which is a factor 200 better than the one obtained in previous analyses based on tree level calculations.
dc.language.iso eng
dc.relation.ispartof Physics Letters B, 1994, vol. 336, num. 1, p. 91-99
dc.subject Camps, Teoria quàntica de
dc.subject Partícules (Física nuclear)
dc.title Bounding effective operators at the one-loop level: the case of four-fermion neutrino interactions
dc.type journal article es_ES
dc.date.updated 2017-07-05T17:28:31Z
dc.identifier.doi 10.1016/0370-2693(94)00961-9
dc.identifier.idgrec 119965
dc.rights.accessRights open access es_ES

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