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Loop bounds on non-standard neutrino interactions
2009 (English)In: Journal of High Energy Physics (JHEP), ISSN 1029-8479, E-ISSN 1126-6708, no 3Article in journal (Refereed) Published
Abstract [en]

We reconsider the bounds on non-standard neutrino interactions with matter which can be derived by constraining the four-charged-lepton operators induced at the loop level. We find that these bounds are model dependent. Naturalness arguments can lead to much stronger constraints than those presented in previous studies, while no completely model-independent bounds can be derived. We will illustrate how large loop-contributions to four-charged-lepton operators are induced within a particular model that realizes gauge invariant non-standard interactions and discuss conditions to avoid these bounds. These considerations mainly affect the O(10(-4)) constraint on the non-standard coupling strength epsilon e(mu), which is lost. The only model-independent constraints that can be derived are O(10(-1)). However, significant cancellations are required in order to saturate this bound.

Place, publisher, year, edition, pages
2009. no 3
Keyword [en]
Beyond Standard Model, Neutrino Physics
National Category
Subatomic Physics
URN: urn:nbn:se:kth:diva-107147DOI: 10.1088/1126-6708/2009/03/139ISI: 000265600800139OAI: diva2:574762
Swedish Research Council

QC 20130513

Available from: 2012-12-06 Created: 2012-12-06 Last updated: 2013-05-13Bibliographically approved

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Blennow, Mattias
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