Journal Club

Seminar Room

If you want to propose a paper, you can contact Supratim Das Bakshi (sdb AT ugr.es)

Tuesday 17th of May, 2022

Towards the renormalisation of the Standard Model effective field theory to dimension eight: Bosonic interactions II

We calculate the renormalisation group running of the bosonic Standard Model (SM) effective operators at one loop and to order v4/Λ4, with v246 GeV being the electroweak scale and Λ the unknown new physics threshold. We focus on contributions driven by one dimension-eight term and SM couplings, thus extending (and completing) the effort initiated in arXiv:2106.05291, in which quantum corrections from pairs of dimension-six interactions were considered. We highlight some interesting consequences, including the renormalisation of loop-induced interactions by tree-level generated terms and, more importantly, the validity of positivity bounds on different operators inducing anomalous gauge quartic couplings.
Comments: 17 pages, 4 tables
Subjects: High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Theory (hep-th)
Cite as: arXiv:2205.03301 [hep-ph]
  (or arXiv:2205.03301v1 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.2205.03301
 

Speaker: Álvaro

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Beta-decay implications for the W-boson mass anomaly

We point out the necessity to consider $\beta$-decay observables in resolutions of the $W$-boson anomaly in the Standard Model Effective Field Theory that go beyond pure oblique corrections. We demonstrate that present global analyses that explain the $W$-boson mass anomaly predict a large, percent-level, violation of first-row CKM unitarity. We investigate what solutions to the $W$-boson mass anomaly survive after including $\beta$-decay constraints.
Subjects: High Energy Physics - Phenomenology (hep-ph); Nuclear Theory (nucl-th)
Report number: INT-PUB-22-014
Cite as: arXiv:2204.08440 [hep-ph]
  (or arXiv:2204.08440v1 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.2204.08440

Submission history

From: Tom Tong [view email]
[v1] Mon, 18 Apr 2022 17:52:41 UTC (94 KB)

Speaker: Kuldeep