Hints of lepton flavor universality violations

Crivellin, Andreas; Hoferichter, Martin (2021). Hints of lepton flavor universality violations. Science, 374(6571), pp. 1051-1052. American Association for the Advancement of Science 10.1126/science.abk2450

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The Standard Model (SM) of particle physics was finalized in its current form in the mid-1970s, and has been extensively tested and confirmed ever since, with the discovery of the Higgs boson in 2012 being the last missing piece. While no new particles have been directly discovered at the Large Hadron Collider (LHC) at CERN so far, precision observables sensitive to quantum effects of new particles have accumulated intriguing hints for physics beyond the SM. All these anomalies can be interpreted from the point of view of lepton flavor universality, i.e., as hints that electrons, muons, and tau leptons differ much more than predicted by the SM. These tensions can be explained by postulating the existence of new exotic particles. Future measurements will be able to conclusively test this hypothesis, potentially providing long-awaited evidence how the SM needs to be extended at high energies.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Hoferichter, Martin

Subjects:

500 Science > 530 Physics

ISSN:

0036-8075

Publisher:

American Association for the Advancement of Science

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

29 Dec 2021 13:37

Last Modified:

05 Dec 2022 15:55

Publisher DOI:

10.1126/science.abk2450

ArXiv ID:

2111.12739

BORIS DOI:

10.48350/161965

URI:

https://boris.unibe.ch/id/eprint/161965

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