New Constraints on Dark Matter Effective Theories from Standard Model Loops

Crivellin, Andreas; D'Eramo, Francesco; Procura, Massimiliano (2014). New Constraints on Dark Matter Effective Theories from Standard Model Loops. Physical review letters, 112(19) American Physical Society 10.1103/PhysRevLett.112.191304

[img] Text
PhysRevLett.112.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (304kB) | Request a copy

We consider an effective field theory for a gauge singlet Dirac dark matter particle interacting with the standard model fields via effective operators suppressed by the scale Λ≳1  TeV. We perform a systematic analysis of the leading loop contributions to spin-independent Dirac dark matter–nucleon scattering using renormalization group evolution between Λ and the low-energy scale probed by direct detection experiments. We find that electroweak interactions induce operator mixings such that operators that are naively velocity suppressed and spin dependent can actually contribute to spin-independent scattering. This allows us to put novel constraints on Wilson coefficients that were so far poorly bounded by direct detection. Constraints from current searches are already significantly stronger than LHC bounds, and will improve in the near future. Interestingly, the loop contribution we find is isospin violating even if the underlying theory is isospin conserving.

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:

Crivellin, Andreas and Procura, Massimiliano

Subjects:

500 Science > 530 Physics

ISSN:

0031-9007

Publisher:

American Physical Society

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

21 Nov 2014 14:43

Last Modified:

26 Jun 2016 01:56

Publisher DOI:

10.1103/PhysRevLett.112.191304

BORIS DOI:

10.7892/boris.60238

URI:

https://boris.unibe.ch/id/eprint/60238

Actions (login required)

Edit item Edit item
Provide Feedback