B. Colquhoun

activity

20112025

most citedThe Upsilon spectrum and the determination of the lattice spacing from lattice QCD including charm quarks in the sea

151 citations · 756 across the 21 of their papers we have counts for

collaborators

26 papers

hep-lat2025

New high-precision $b$ , $c$ , and $s$ masses from pseudoscalar-pseudoscalar correlators in $n_{f} = 4$ lattice QCD

Brian Colquhoun, Christine T. H. Davies, Daniel Hatton +1

We extend an earlier lattice QCD analysis of heavy-quark current-current correlators to obtain new values for the $MS$ masses of the $b$ , $c$ , and $s$ ~quarks. T…

hep-lat2025★ 2 cited

Constraints on axion-like particles using lattice QCD calculations of the rate for $J / ψ \to γ a$

Brian Colquhoun, Christine T. H. Davies, G. Peter Lepage +1

A key search mode for axion-like particles (ALPs) that couple to charm quarks is $J / ψ \to γ a$ . Here we calculate the form factor that allows the rate of this process to be determine…

hep-lat2024

Precise prediction of the decay rate for $η_{b} \to γ γ$ from lattice QCD

Brian Colquhoun, Christine T. H. Davies, G. Peter Lepage

We calculate the decay rate for $η_{b} \to γ γ$ in lattice QCD for the first time, providing a precise prediction for the Belle II experiment. Our calculation includes $u$ , $d$ , $s$ a…

hep-lat2024

Improved analysis of strong-interaction-stable doubly-bottom tetraquarks on the lattice

B. Colquhoun, A. Francis, R. J. Hudspith +3

We update earlier lattice results for the binding energies of the flavor antitriplet of strong-interaction-stable doubly bottom, $J^{P} = 1^{+}$ tetraquarks, employing an extended sink c…

hep-lat2023★ 24 cited

Precise determination of decay rates for $η_{c} \to γ γ$ , $J / ψ \to γ η_{c}$ and $J / ψ \to η_{c} e^{+} e^{-}$ from lattice QCD

Brian Colquhoun, Laurence J. Cooper, Christine T. H. Davies +1

We calculate the decay rates for $η_{c} \to γ γ$ , $J / ψ \to γ η_{c}$ and $J / ψ \to η_{c} e^{+} e^{-}$ in lattice QCD with $u$ , $d$ , $s$ and $c$ quarks in the sea for the first time. We improve sign…

hep-lat2022★ 39 cited

Form factors of $B \to π ℓ ν$ and a determination of $∣ V_{u b} ∣$ with Möbius domain-wall-fermions

Brian Colquhoun, Shoji Hashimoto, Takashi Kaneko +1

Using a fully relativistic lattice fermion action, we compute the form factors of the semileptonic decay $B \to π ℓ ν$ , which is required for the determination of the Cabibbo-Kobaya…

New high-precision b, c, and s masses from pseudoscalar-pseudoscalar correlators in nf​=4 lattice QCD

Constraints on axion-like particles using lattice QCD calculations of the rate for J/ψ→γa

Precise prediction of the decay rate for ηb​→γγ from lattice QCD