Journal Article

PUBDB-2025-00268

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Aligned yet large dipoles: a SMEFT study

Bonnefoy, Q.DESY* ; Kley, J.DESY* ; Liu, D. (Corresponding author)DESY* ; Rossia ; Yao, C. Y.DESY*

2024
Springer Heidelberg

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Please use a persistent id in citations: doi:10.1007/JHEP11(2024)046  doi:10.3204/PUBDB-2025-00268

Report No.: COMETA-2024-004; DESY-24-033; HU-EP-24/09; LAPTH-011/24; arXiv:2403.13065

Abstract: We study a non-universal flavor scenario at the level of the Standard Model Effective Field Theory, according to which the matrix of Wilson coefficients c$_{uW}$ of an up-type electroweak quark dipole operator is aligned with the up-type Yukawa coupling. Such an alignment usually follows from the assumption of Minimal Flavor Violation (MFV), away from which we step by allowing the entries of c$_{uW}$ to be sizable along the first quark generations. A particular example, which we refer to as “inverse hierarchy MFV”, features Wilson coefficients inversely proportional to quark masses, and arises from BSM models respecting MFV and containing heavy fields that replicate the mass hierarchy of SM quarks. We then analyze the phenomenology driven by c$_{uW}$ at colliders and at lower-energy flavor experiments. We show that precision measurements of the process pp → Wh → γγℓν at FCC-hh could set an upper bound on |c$_{uW}$| ≲ $ \mathcal{O} $(10$^{−2}$)(Λ/TeV)$^{2}$, with Λ the cutoff of the effective field theory. This bound is an order of magnitude stronger than the existing LHC bounds. Moreover, we estimate that Wh → $ b\overline{b}\ell \nu $ at HL-LHC could also give competitive bounds. In the low-energy regime, we consider bounds arising from rare kaon decays, which turn out to be loose, |$ {c}_{uW}^{11} $| <$ \mathcal{O} $(1)(Λ/TeV)$^{2}$. We finally demonstrate that our flavor and operator assumptions can be derived from a weakly-coupled UV model, which we choose to simultaneously illustrate the UV origin of inverse hierarchy MFV.

Keyword(s): new physics ; effective field theory ; operator: dipole ; flavor: violation: minimal ; CERN LHC Coll: upgrade ; FCC-hh ; p p: scattering ; Higgs particle: production ; W: production ; electroweak interaction ; p p --> W Higgs particle ; W Higgs particle --> bottom anti-bottom lepton neutrino ; SMEFT ; Electric Dipole Moments ; Electroweak Precision Physics

Note: 22 pages (main) + 15 pages (appendices & references), 6 figures, 7 tables. JHEP published version. Typos are corrected

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. DFG project G:(GEPRIS)390833306 - EXC 2121: Quantum Universe (390833306) (390833306)
3. ASYMMETRY - Essential Asymmetries of Nature (101086085) (101086085)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2024

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Database coverage:
; ; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; National-Konsortium ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Bonnefoy, Q.DESY* ; Kley, J.Extern*DESY* ; Liu, D. (Corresponding author)DESY* ; Rossia ; Yao, C. Y.Extern*DESY*
Aligned Yet Large Dipoles: a SMEFT Study
[10.3204/PUBDB-2024-01122]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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