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Limits on electroweak instanton-induced processes with multiple boson production

A preprint version of the article is available at arXiv.


Recently, the CMS collaboration has reported their search for electroweak instanton-like processes with anomalous B + L violation assuming multi-fermion but zero-boson final states. On the other hand, many theoretical studies suggest that anomalous B + L processes may have an observably large production rate only if their final state contains a large number of electroweak gauge bosons. In this paper, we review the state-of-the-art of the predictions of electroweak instanton-induced processes and compare collider signatures of zero- and multi-boson events of anomalous B + L violation at the LHC. An upper limit on the cross-section for the multi-boson process is derived by recasting the CMS analysis.


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Correspondence to Kazuki Sakurai.

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ArXiv ePrint: 1809.10833

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Ringwald, A., Sakurai, K. & Webber, B.R. Limits on electroweak instanton-induced processes with multiple boson production. J. High Energ. Phys. 2018, 105 (2018).

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  • Deep Inelastic Scattering (Phenomenology)