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9 Results Found

  • Article
  • Open Access
2,059 Views
15 Pages

Lepton Flavour Universality in Rare B Decays

  • Paula Álvarez Cartelle and
  • Richard Morgan Williams

30 June 2024

Tests of lepton flavour universality in rare decays of b hadrons mediated by flavour-changing neutral-current transitions constitute sensitive probes for physics beyond the standard model. In recent years, such tests have become increasingly precise...

  • Review
  • Open Access
1,141 Views
9 Pages

This review highlights advancements in testing Lepton Flavour Universality (LFU) through semileptonic b-hadron decays at the LHCb detector. Measurements of the LFU R(D) and R(D*) provide evidence of deviations from Standard Model (SM) predictions, su...

  • Review
  • Open Access
2 Citations
2,592 Views
19 Pages

Probes of Lepton Flavor Universality in bu Transitions

  • Pietro Colangelo,
  • Fulvia De Fazio and
  • Francesco Loparco

27 February 2020

Anomalies recently observed in semileptonic b → c ℓ − ν ¯ ℓ and b → s ℓ + ℓ − transitions point to violation of Lepton Flavour Universality. Strategies for new analyses of different modes are re...

  • Article
  • Open Access
1 Citations
1,677 Views
15 Pages

Strange Things in Bottom-to-Strange Decays: The Standard Model Turned Upside Down?

  • Martin Andersson,
  • Alexander Mclean Marshall,
  • Konstantinos A. Petridis and
  • Eluned Smith

21 May 2024

The flavour anomalies are a set of experimental deviations from the Standard Model (SM) predictions in several observables involving decays of bottom quarks. In particular, tensions between theory and experiment in measurements involving a bottom qua...

  • Article
  • Open Access
6 Citations
1,957 Views
14 Pages

Flavour Anomalies in a U(1) SUSY Extension of the SM

  • Alexander Bednyakov and
  • Alfiia Mukhaeva

26 January 2021

Flavour anomalies have attracted a lot of attention over recent years as they provide unique hints for possible New Physics. Here, we consider a supersymmetric (SUSY) extension of the Standard Model (SM) with an additional anomaly-free gauge U(1) gro...

  • Feature Paper
  • Review
  • Open Access
3 Citations
5,245 Views
27 Pages

6 August 2020

Symmetries in the Physical Laws of Nature lead to observable effects. Beyond the regularities and conserved magnitudes, the last few decades in particle physics have seen the identification of symmetries, and their well-defined breaking, as the guidi...

  • Article
  • Open Access
10 Citations
4,564 Views
27 Pages

Axial Anomaly in Galaxies and the Dark Universe

  • Janning Meinert and
  • Ralf Hofmann

Motivated by the SU(2)CMB modification of the cosmological model ΛCDM, we consider isolated fuzzy-dark-matter lumps, made of ultralight axion particles whose masses arise due to distinct SU(2) Yang–Mills scales and the Planck mass MP. In contrast to...