## Search

Now showing items 1-10 of 79

#### Strong-isospin-breaking correction to the muon anomalous magnetic moment from lattice QCD at the physical point

All lattice-QCD calculations of the hadronic-vacuum-polarization contribution to the muon's anomalous magnetic moment to-date have been performed with degenerate up- and down-quark masses. Here we calculate directly the ...

#### Solution of the Gribov problem from gauge invariance

(2008-12-01)

A new approach to gauge fixed Yang-Mills theory is derived using the Polyakov-Susskind projection techniques to build gauge invariant states. In our approach, in contrast to the Faddeev-Popov method, the Gribov problem ...

#### $B_c$ decays from highly improved staggered quarks and NRQCD

(2016-11-07)

We calculate semileptonic form factors for the decays $B_c \to \eta_c \, l \nu$ and $B_c \to J/\psi \, l \nu$ over the entire $q^2$ range, using a highly improved lattice quark action for charm at several lattice spacings ...

#### Hadronic-vacuum-polarization contribution to the muon's anomalous magnetic moment from four-flavor lattice QCD

(American Physical Society, 2020-02-18)

We calculate the contribution to the muon anomalous magnetic moment hadronic vacuum polarization from the connected diagrams of up and down quarks, omitting electromagnetism. We employ QCD gauge-field configurations with ...

#### The anomalous magnetic moment of the muon in the Standard Model

(Elsevier, 2020-08-14)

We review the present status of the Standard Model calculation of the anomalous magnetic moment of the muon. This is performed in a perturbative expansion in the fine-structure constant $\alpha$ and is broken down into ...

#### Determination of the quark condensate from heavy-light current-current correlators in full lattice QCD

(American Physical Society, 2019-08-08)

We derive the Operator Product Expansion whose vacuum expectation value gives the time-moments of the pseudoscalar heavy-light current-current correlator up to and including terms in $\alpha_s^2$ multiplying $\langle\ove ...

#### Disconnected hadronic vacuum polarization contribution to the muon g-2 with HISQ

(2018-11-14)

We describe a computation of the contribution to the anomalous magnetic moment of the muon from the disconnected part of the hadronic vacuum polarization. We use the highly-improved staggered quark (HISQ) formulation for ...

#### Boundary and Interface CFTs from the Conformal Bootstrap

(2015-02-25)

We explore some consequences of the crossing symmetry for defect conformal field theories, focusing on codimension one defects like flat boundaries or interfaces. We study surface transitions of the 3d Ising and other O(N) ...

#### Large volumes and spectroscopy of walking theories

(2015-12-27)

A detailed investigation of finite size effects is performed for SU(2) gauge theory with two fermions in the adjoint representation, which previous lattice studies have shown to be inside the conformal window. The system ...

#### The density of states approach to the sign problem

(2019-01-22)

Approaches to the sign problem based on the density of states have been recently revived by the introduction of the LLR algorithm, which allows us to compute the density of states itself with exponential error reduction. ...