Leptonic decays of charged pseudoscalar mesons - 2012

Abstract

We review the physics of purely leptonic decays of ${\pi }^{\pm }$, $K^{\pm }$, $D^{\pm }$, $D_s^{\pm }$, and $B^{\pm }$ pseudoscalar mesons. The measured decay rates are related to the product of the relevant weak-interaction-based CKM matrix element of the constituent quarks and a strong interaction parameter related to the overlap of the quark and antiquark wave-functions in the meson, called the decay constant $f_P$. The interplay between theory and experiment is different for each particle. Theoretical predictions of $f_B$ that are needed in the $B$ sector can be tested by measuring $f_{D^{+}}$ and $f_{D_s^{+}}$ in the charm sector. The lighter ${\pi }^{\pm }$ and $K^{\pm }$ mesons provide stringent comparisons between experiment and theory due to the accuracy of both the measurements and the theoretical predictions. This review was prepared for the Particle Data Group's 2012 edition.

10 pages, 2 figures. Mini-review for the Particle Data Group's 2012 edition. Sentence deleted

Cited by in corpus (42)

• Scalar contributions to $b\to c(u)\tau \nu$ transitions
• Charged-Higgs phenomenology in the Aligned two-Higgs-doublet model
• Rare $B$ Decays as Tests of the Standard Model
• Decay constants of heavy-light vector mesons from QCD sum rules
• Two-Loop Neutrino Mass Generation through Leptoquarks
• A frequentist analysis of three right-handed neutrinos with GAMBIT
• Effective Majorana mass matrix from tau and pseudoscalar meson lepton number violating decays
• The CKM parameters in the SMEFT
• Two-body non-leptonic heavy-to-heavy decays at NNLO in QCD factorization
• Universal Unitarity Triangle 2016 and the Tension Between $\Delta M_{s,d}$ and ${\epsilon }_K$ in CMFV Models
• Searches for violation of lepton flavour and baryon number in tau lepton decays at LHCb
• Towards New Frontiers in the Exploration of Charmless Non-Leptonic $B$ Decays
• Sensitivity to Majorana neutrinos in $\Delta L=2$ decays of $B_c$ meson at LHCb
• Exclusive hadronic tau decays as probes of non-SM interactions
• Exploring $B\to \pi \pi ,\pi K$ Decays at the High-Precision Frontier
• Sterile neutrinos facing kaon physics experiments
• XYZ-SU3 Breakings from Laplace Sum Rules at Higher Orders
• Two-loop mass splittings in electroweak multiplets: winos and minimal dark matter
• Leptonic decay-constant ratio $f_K/f_{\pi }$ from lattice QCD using 2+1 clover-improved fermion flavors with 2-HEX smearing
• $B^0$-${\bar{B}}^0$ mixing: matching to HQET at NNLO
• Measuring V_ub and probing SUSY with double ratios of purely leptonic decays of B and D mesons
• The ratio m_c/m_s with Wilson fermions
• Simple estimates of the masses of pentaquarks with hidden beauty or strangeness
• Theoretical aspects of Chiral Dynamics
• New physics contributions in $B\to \pi \tau \bar{\nu }$ and $B\to \tau \bar{\nu }$
• Constraints on the charged-current non-standard neutrino interactions induced by the gauge boson $W^{\prime }$
• Charm quark mass and D-meson decay constants from two-flavour lattice QCD
• Probing new physics in class-I $B$-meson decays into heavy-light final states
• Can Flavor Physics Hint at Distinctive Signals for R-parity Violation at the LHC?
• $SU(3{)}_F$ Gauge Family Model and New Symmetry Breaking Scale From FCNC Processes
• Matching of heavy-light flavour currents between HQET at order 1/m and QCD: I. Strategy and tree-level study
• LQCD: Flavor Physics and Spectroscopy
• Improved measurements of $D_s$ meson decay constant and branching fractions of $D_s^{+}\to K^{-}{K}^{+}{\pi }^{+}$, $\bar{K}{}^0{K}^{+}$ and $\eta {\pi }^{+}$ decays from Belle
• New physics from flavour
• Lattice results for $D/D_s$ leptonic and semileptonic decays
• $D$-meson semileptonic form factors at zero momentum transfer in (2+1+1)-flavor lattice QCD
• $|V_{us}|$ from $K$ decays in theory
• Decay constants $f_B$ and $f_{B_s}$ from HISQ simulations
• Rescaling of quantized skyrmions: from nucleon to baryons with heavy flavor
• Decay Constants of Heavy-Light Mesons from QCD
• Lattice QCD: Flavor Physics and Spectroscopy
• Angular distribution and asymmetries in the decay of the polarized charmed baryon ${\Lambda }_c^{+}\to K^{-}{\Delta }^{++}\to K^{-}p{\pi }^{+}$