Quark flavor physics and lattice QCD

Abstract

For a long time, investigation into the weak interactions of quarks has guided us toward understanding the Standard Model we know today. Now in the era of high precision, these studies are still one of the most promising avenues for peering beyond the Standard Model. This is a large-scale endeavour with many tales and many protagonists. In these pages I follow a few threads of a complex story, those passing through the realm of lattice gauge theory.

arXiv commentContribution to the EPJA special issue "Lattice Field Theory during the COVID-19 pandemic" in replacement of a plenary talk at the 38th International Symposium on Lattice Field Theory (Lattice 2020). 13 pages. v2: Numerous small changes thanks to feedback; conclusions unchanged. Accepted to European Physical Journal A

References in corpus (78)

• Weak Decays Beyond Leading Logarithms
• ππscattering
• FLAG Review 2019
• Charm-loop effect in $B\to K^{(\ast )}{\ell }^{+}{\ell }^{-}$ and $B\to K^{\ast }\gamma$
• Dispersive Bounds on the Shape of B -> D^(*) l nu Form Factors
• Differential branching fractions and isospin asymmetries of $B\to K^{(\ast )}{\mu }^{+}{\mu }^{-}$ decays
• Domain wall QCD with physical quark masses
• Model-independent description of $B\to \pi l\nu$ decays and a determination of $|V_{ub}|$
• High Precision determination of the pi, K, D and D_s decay constants from lattice QCD
• $B$- and $D$-meson leptonic decay constants from four-flavor lattice QCD
• Reduced hadronic uncertainty in the determination of $V_{ud}$
• Combined analysis of semileptonic $B$ decays to $D$ and $D^{\ast }$: $R(D^{(\ast )})$, $|V_{cb}|$, and new physics
• Lattice QCD calculation of form factors describing the rare decays $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ and $B_s\to \varphi {\ell }^{+}{\ell }^{-}$
• $R(D^{\ast })$, $|V_{cb}|$, and the Heavy Quark Symmetry relations between form factors
• ${\Lambda }_b\to p{\ell }^{-}{\bar{\nu }}_{\ell }$ and ${\Lambda }_b\to {\Lambda }_c{\ell }^{-}{\bar{\nu }}_{\ell }$ form factors from lattice QCD with relativistic heavy quarks
• Radiative Corrections to Neutron and Nuclear Beta Decays Revisited
• Exclusive rare B -> K*e+e- decays at low recoil: controlling the long-distance effects
• $B_{(s)}^0$-mixing matrix elements from lattice QCD for the Standard Model and beyond
• Extraction of $|V_{cb}|$ from $B\to D^{(\ast )}\ell {\nu }_{\ell }$ and the Standard Model predictions of $R(D^{(\ast )})$
• Theory of B -> K(*)l+l- decays at high q^2: OPE and quark-hadron duality
• B Meson Semileptonic Form Factors from Unquenched Lattice QCD
• Determination of the quark coupling strength $|V_{ub}|$ using baryonic decays
• Standard-model prediction for direct CP violation in $K\to \pi \pi$ decay
• Dispersive Evaluation of the Inner Radiative Correction in Neutron and Nuclear $\beta$-decay
• A fresh look at the determination of |V_cb| from B-> D^* l nu
• $|V_{ub}|$ from $B\to \pi \ell \nu$ decays and (2+1)-flavor lattice QCD
• B-meson decay constants from improved lattice NRQCD and physical u, d, s and c sea quarks
• Heavy meson masses and decay constants from relativistic heavy quarks in full lattice QCD
• Neutron Lifetime and Axial Coupling Connection
• Precise Determination of |V{us}| from Lattice Calculations of Pseudoscalar Decay Constants
• The $V_{cb}$ puzzle: an update
• Long-distance effects in $B\to K^{\ast }\ell \ell$ from Analyticity
• Neutral B-meson mixing from full lattice QCD at the physical point
• $B\to \pi \ell \nu$ and $B_s\to K\ell \nu$ form factors and $|V_{ub}|$ from 2+1-flavor lattice QCD with domain-wall light quarks and relativistic heavy quarks
• B-meson decay constants: a more complete picture from full lattice QCD
• Multichannel one-to-two transition amplitudes in a finite volume
• First lattice calculation of the QED corrections to leptonic decay rates
• Joint lattice QCD - dispersion theory analysis confirms the quark-mixing top-row unitarity deficit
• Bs mixing observables and Vtd/Vts from sum rules
• Standard Model predictions for B -> Kll with form factors from lattice QCD
• $D\to K,l\nu$ Semileptonic Decay Scalar Form Factor and $|V_{cs}|$ from Lattice QCD
• Model-Independent Extraction of $|V_{cb}|$ from $\bar{B}\to D^{\ast }\ell \overline{\nu }$
• $B_s\to K\ell \nu$ form factors from lattice QCD
• Quark spins and Anomalous Ward Identity
• $\gamma W$-box Inside-Out: Nuclear Polarizabilities Distort the Beta Decay Spectrum
• $B_s\to D_s\ell \nu$ Form Factors for the full $q^2$ range from Lattice QCD with non-perturbatively normalized currents
• ${\Lambda }_c\to \Lambda {\ell }^{+}{\nu }_{\ell }$ form factors and decay rates from lattice QCD with physical quark masses
• Neutral Kaon Mixing Beyond the Standard Model with $n_f=2+1$ Chiral Fermions Part 1: Bare Matrix Elements and Physical Results
• $K\to \pi$ semileptonic form factors with $N_f=2+1+1$ Twisted Mass fermions
• $D\to \pi ,l\nu$ Semileptonic Decays, $|V_{cd}|$ and 2${}^{nd}$ Row Unitarity from Lattice QCD
• First-principles calculation of electroweak box diagrams from lattice QCD
• Inclusive semi-leptonic decays from lattice QCD
• The ratio FK/Fpi in QCD
• Lattice QCD calculation of the $B_{(s)}\to D_{(s)}^{\ast }\ell \nu$ form factors at zero recoil and implications for $|V_{cb}|$
• $R(J/\psi )$ and $B_c^{-}\to J/\psi {\ell }^{-}{\bar{\nu }}_{\ell }$ Lepton Flavor Universality Violating Observables from Lattice QCD
• New methods for B meson decay constants and form factors from lattice NRQCD
• The decay constants ${\mathbf{f}}_{\mathbf{D}}$ and ${\mathbf{f}}_{{\mathbf{D}}_{\mathbf{s}}}$ in the continuum limit of ${\mathbf{N}}_{\mathbf{f}}=2+1$ domain wall lattice QCD
• Direct CP violation and the $\Delta I=1/2$ rule in $K\to \pi \pi$ decay from the Standard Model
• $B\to \pi \ell \ell$ form factors for new-physics searches from lattice QCD
• |V_cd| from D Meson Leptonic Decays
• $B_c\to J/\psi$ Form Factors for the full $q^2$ range from Lattice QCD
• $B_s\to K\ell \nu$ decay from lattice QCD
• Tensions and correlations in $|V_{cb}|$ determinations
• $|V_{us}|$ from $K_{\ell 3}$ decay and four-flavor lattice QCD
• Polyakov loop in 2+1 flavor QCD
• Prospects for a lattice computation of rare kaon decay amplitudes II $K\to \pi \nu \bar{\nu }$ decays
• Extraction of $|V_{cd}|$ and $|V_{cs}|$ from experimental decay rates using lattice QCD $D\to \pi (K)\ell \nu$ form factors
• Prospects for a lattice computation of rare kaon decay amplitudes: $K\to \pi {\ell }^{+}{\ell }^{-}$ decays
• Lattice QCD study of the rare kaon decay $K^{+}\to {\pi }^{+}\nu \bar{\nu }$ at a near-physical pion mass
• $B_c\to B_{s(d)}$ form factors from lattice QCD
• $B\to \pi \ell \nu$ at zero recoil from lattice QCD with physical $u/d$ quarks
• Charmed and $\varphi$ meson decay constants from 2+1-flavor lattice QCD
• New method for calculating electromagnetic effects in semileptonic beta-decays of mesons
• Lattice QCD matrix elements for the $B_s^0-{\bar{B}}_s^0$ width difference beyond leading order
• Neutral kaon mixing beyond the Standard Model with nf=2+1 chiral fermions part II: Non Perturbative Renormalisation of the $\Delta F=2$ four-quark operators
• Flavour breaking effects in the pseudoscalar meson decay constants
• $O(4)$-symmetric position-space renormalization of lattice operators
• How much do charm sea quarks affect the charmonium spectrum?

Cited by in corpus (2)

• 50 Years of Quantum Chromodynamics
• Form factors of $B\to \pi \ell \nu$ and a determination of $|V_{ub}|$ with Möbius domain-wall-fermions