Drell-Yan production in universal theories beyond dimension-six SMEFT
- Autor(en)
- Tyler Corbett, Jay Desai, O. J. P. Éboli, M. C. Gonzalez-Garcia, Matheus Martines, Peter Reimitz
- Abstrakt
We study Drell-Yan production in universal theories consistently including effects beyond dimension sixin the Standard Model effective field theory (SMEFT). Within universal SMEFT and with C and Pconservation we find that 11 dimension-eight operators contribute in addition to the six contributing atdimension six. We first work in an operator basis in which operators with higher derivatives of the bosonicfields have been rotated by equations of motion in favor of combinations of operators involving SMfermion currents. We derive the general form of the amplitudes consistently in the expansion to OðΛ−4Þ andidentify eight combinations of the 17 Wilson coefficients which are physically distinguishable by studyingthe invariant mass distribution of the lepton pairs produced. We then introduce an extension of theparametrization of universal effects in terms of oblique parameters obtained by linearly expanding the self-energies of the electroweak gauge bosons to Oðq6Þ. It contains 11 oblique parameters of which only eightare generated within SMEFT at dimension eight: ˆS, ˆT, W, Y, ˆU, X, plus two additional which we label W0and Y0 and show how they match at linear order with the eight identified combinations of operatorcoefficients. We then perform a combined analysis of a variety of LHC data on the neutral- and charged-current Drell-Yan processes with the aim of constraining the eight combinations. We compare and combinethe LHC bounds with those from electroweak precision W and Z pole observables which can only provideconstraints in four directions of the eight-parameter space. We present the results in terms of limits on theeight effective Wilson coefficients as well as on the eight oblique parameters. In each case, we study thedependence of the derived constraints on the order of the expansion considered.
- Organisation(en)
- Teilchenphysik
- Externe Organisation(en)
- State University of New York, Stony Brook, Universidade de São Paulo, Universitat de Barcelona, Institució Catalana de Recerca i Estudis Avançats (ICREA), Universidade Federal de São Paulo, Université Paris Saclay
- Journal
- Physical Review D
- Band
- 112
- Anzahl der Seiten
- 24
- ISSN
- 2470-0010
- DOI
- https://doi.org/10.48550/arXiv.2503.19962
- Publikationsdatum
- 07-2025
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103012 Hochenergiephysik
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/4ca2e369-8e5e-4420-9549-0998c64759d8