Accumulating evidence for nonstandard leptonic decays of D_s mesons

Abstract

The measured rate for D_s -> l nu decays, where l is a muon or tau, is larger than the standard model prediction, which relies on lattice QCD, at the 3.8 sigma level. We discuss how robust the theoretical prediction is, and we show that the discrepancy with experiment may be explained by a charged Higgs boson or a leptoquark.

4 pages; v2 conforms with PRL version

References in corpus (5)

• Highly Improved Staggered Quarks on the Lattice, with Applications to Charm Physics
• High Precision determination of the pi, K, D and D_s decay constants from lattice QCD
• Measurement of the q2 dependence of the Hadronic Form Factor in D0 --> K- e+ nu_e decays
• Effect of H^\pm on B^\pm\to τ^\pmν_τand D^\pm_s\to μ^\pmν_μ,τ^\pmν_τ
• Search for Pair Production of Second Generation Scalar Leptoquarks in ppbar Collisions at sqrt(s)=1.96 TeV

Cited by in corpus (33)

• FLAG Review 2021
• Update: Precision D_s decay constant from full lattice QCD using very fine lattices
• Charmed and light pseudoscalar meson decay constants from four-flavor lattice QCD with physical light quarks
• The B -> pi l nu semileptonic form factor from three-flavor lattice QCD: A model-independent determination of |V(ub)|
• Constraints on two-lepton, two quark operators
• Twenty-first Century Lattice Gauge Theory: Results from the QCD Lagrangian
• New lattice action for heavy quarks
• FLAG Review 2024
• Charged Higgs phenomenology in the lepton-specific two Higgs doublet model
• Discerning new physics in charm meson leptonic and semileptonic decays
• Measurement of the Absolute Branching Fractions for $D_s^{-}\to {\ell }^{-}{\bar{\nu }}_{\ell }$ and Extraction of the Decay Constant $f_{D_s}$
• Interpretation of the "$f_{D_s}$ puzzle" in SM and beyond
• Leptoquarks in FCNC charm decays
• Measurement of the $D_s^{+}\to {\ell }^{+}{\nu }_{\ell }$ branching fractions and the decay constant $f_{D_s^{+}}$
• |V_{cd}|, |V_{cs}| and f_{D_s} from (semi) leptonic $D_{(s)}$-decays : signals of New Physics ?
• Improved $V_{cs}$ determination using precise lattice QCD form factors for $D\to K\ell \nu$
• Leptoquark on $P\to {\ell }^{+}\nu$, FCNC and LFV
• Light quark mass dependence of the $D$ and $D_s$ decay constants
• Searching for New Physics with Charm
• Upper bounds on $f_D$ and $f_{D_s}$ from two-point correlation function in QCD
• Two-loop neutrino masses with large R-parity violating interactions in supersymmetry
• B and D Meson Decay Constants
• Probing New Physics in Charm Couplings with FCNC
• Search for TeV Scale Physics in Heavy Flavour Decays
• $D_s$ physics from fine lattices
• Leptonic decays of D_s and B^+ mesons in supersymmetric standard model with R-parity violating interactions
• Non-Standard Physics in Leptonic and Semileptonic Decays of Charmed Mesons
• Quantum chromodynamics with advanced computing
• Lattice QCD and Flavour Physics
• Model Dependent Analysis of D_((s))^+ arrows η^((')) l^+ ν_l Decays in Beyond Standard Model
• Measurements of D and Ds decay constants at CLEO
• Observation of $D^{+}\to K_S^0{\pi }^0{\mu }^{+}{\nu }_{\mu }$, Test of Lepton Flavor Universality and First Angular Analysis of $D^{+}\to {\bar{K}}^{\ast }(892{)}^0{\ell }^{+}{\nu }_{\ell }$
• Theoretical Perspectives: XLIII Rencontres de Moriond - QCD