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SUMMARY:IFIC Seminar: Status of lepton universality within and beyond the 
 Standard model
DTSTART;VALUE=DATE-TIME:20240507T100000Z
DTEND;VALUE=DATE-TIME:20240507T110000Z
DTSTAMP;VALUE=DATE-TIME:20260411T171212Z
UID:indico-event-7553@indico.ific.uv.es
DESCRIPTION:We describe the current experimental status of the lepton flav
 our universality. We focus on the long-standing discrepancy in lepton flav
 or universality ratios R_D and R_{D^{*}} and assess the status of scalar
  leptoquark states R_2\, R~_2 and S1 which can in principle provide a de
 sired enhancement of $\\mathcal{B}(B\\to D^{(* )}\\tau \\nu)$ in a minima
 l setup with two Yukawa couplings only.\n\nWe consider unavoidable low-ene
 rgy constraints\, Z-pole measurements as well as high-p_T constraints. Af
 ter setting mass of each leptoquark to 1.5 TeV we find that of all consi
 dered states only S1 leptoquark\, coupled to both chiralities of leptons 
 and quarks\, is still a completely viable solution while the scenario with
  R_2 is in serious tension with the di-tau production LHC constraints at 
 high-p_T and with $\\Gamma(Z \\to \\tau \\tau)$. We comment on the future
  experimental tests of S1 scenario. \n\nhttps://indico.ific.uv.es/event/
 7553/
LOCATION:Universe 1001-Primera-1-1-1 - Paterna. Seminario
URL:https://indico.ific.uv.es/event/7553/
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