Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Peardon, Michael"'
Autor:
Barca, Lorenzo, Knechtli, Francesco, Martins, Sofie, Peardon, Michael, Schaefer, Stefan, Urrea-Niño, Juan Andrés
This study explores the application of a two-level algorithm to enhance the signal-to-noise ratio of glueball calculations in four-dimensional $\mathrm{SU(3)}$ pure gauge theory. Our findings demonstrate that the statistical errors exhibit an exponen
Externí odkaz:
http://arxiv.org/abs/2406.12656
We propose a modification to the Cayley transform that defines a suitable local parameterization for the special unitary group $\mathrm{SU(3)}$. The new mapping is used to construct splitting methods for separable Hamiltonian systems whose phase spac
Externí odkaz:
http://arxiv.org/abs/2406.11337
The low-lying energy spectrum of the static-colour-source-anti-source system in a vacuum containing light and strange quarks is computed using lattice QCD for a range of different light quark masses. The resulting levels are described using a simple
Externí odkaz:
http://arxiv.org/abs/2403.00754
Autor:
Urrea-Niño, Juan Andrés, Finkenrath, Jacob, Höllwieser, Roman, Knechtli, Francesco, Korzec, Tomasz, Peardon, Michael
We use the method of optimal distillation profiles to compute the low-lying charmonium spectrum in an $N_f = 3+1$ ensemble at the $SU(3)$ light flavor symmetric point ($m_{\pi} \approx 420$ MeV), physical charm quark mass and lattice spacing $a\appro
Externí odkaz:
http://arxiv.org/abs/2312.16740
Autor:
Barca, Lorenzo, Knechtli, Francesco, Peardon, Michael, Schaefer, Stefan, Urrea-Niño, Juan Andrés
The computation of the glueball spectrum is particularly challenging due to the rapid decay of the signal-to-noise ratio of the correlation functions. To address this issue, advanced techniques such as gauge link smearing and the variational method a
Externí odkaz:
http://arxiv.org/abs/2312.11372
Optimized meson operators in the distillation framework are used to study the charmonium spectrum in two ensembles with two heavy dynamical quarks at half the physical charm quark mass but different lattice spacings. The use of optimal meson distilla
Externí odkaz:
http://arxiv.org/abs/2212.09404
Autor:
Höllwieser, Roman, Knechtli, Francesco, Korzec, Tomasz, Peardon, Michael, Urrea-Niño, Juan Andrés
We investigate static quark anti-quark operators based on trial states formed from eigenvectors of the covariant three-dimensional lattice Laplace operator. We test the method by computing the static quark-anti-quark potential and comparing results t
Externí odkaz:
http://arxiv.org/abs/2212.08485
Smearing the bare quantum fields in lattice calculations before applying composite hadron creation operators has a long record of substantially improving overlaps onto low-lying energy eigenstates. A technique called distillation which defines smeari
Externí odkaz:
http://arxiv.org/abs/2205.11564
Autor:
Cheung, Gavin K. C., Thomas, Christopher E., Wilson, David J., Moir, Graham, Peardon, Michael, Ryan, Sinéad M.
Publikováno v:
JHEP 02 (2021) 100
Elastic scattering amplitudes for $I=0$ $DK$ and $I=0,1$ $D\bar{K}$ are computed in $S$, $P$ and $D$ partial waves using lattice QCD with light-quark masses corresponding to $m_\pi = 239$ MeV and $m_\pi = 391$ MeV. The $S$-waves contain interesting f
Externí odkaz:
http://arxiv.org/abs/2008.06432
Autor:
Cheung, Gavin K. C., O'Hara, Cian, Moir, Graham, Peardon, Michael, Ryan, Sinéad M., Thomas, Christopher E., Tims, David
Publikováno v:
JHEP 12 (2016) 089
We present highly-excited charmonium, $D_s$ and $D$ meson spectra from dynamical lattice QCD calculations with light quarks corresponding to $M_{\pi} \sim 240$ MeV and compare these to previous results with $M_{\pi} \sim 400$ MeV. Utilising the disti
Externí odkaz:
http://arxiv.org/abs/1610.01073