Controlling the sign problem in finite-density quantum field theory

Autor: Nicolas Garron, Kurt Langfeld

Publikováno v: European Physical Journal C: Particles and Fields, Vol 77, Iss 7, Pp 1-13 (2017)

Abstract Quantum field theories at finite matter densities generically possess a partition function that is exponentially suppressed with the volume compared to that of the phase quenched analog. The smallness arises from an almost uniform distributi

Externí odkaz: https://doaj.org/article/e9bf7d9b37fe4c8785a3a488c45ee81b

Beyond the standard model kaon mixing with physical masses

Autor: Justus Tobias Tsang, Julia Kettle, Nicolas Garron, R.J. Hudspith, Peter Boyle, Ava Khameh

Publikováno v: Proceedings of The 36th Annual International Symposium on Lattice Field Theory — PoS(LATTICE2018).

We present results from a calculation of beyond the standard model (BSM) kaon mixing including data at the physical point. We simulare $N_f=2+1$ QCD with and Iwasaki gauge and domain wall fermions on 8 ensembles, spanning 3 lattice spacings and pion

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::630d45216b0428a3be124bb94d0b3a6a
https://doi.org/10.22323/1.334.0285

A per-cent-level determination of the nucleon axial coupling from quantum chromodynamics

Autor: Christopher Monahan, Evan Berkowitz, Thorsten Kurth, David Brantley, Chia Cheng Chang, Michael A. Clark, Henry Monge-Camacho, Amy Nicholson, Andre Walker-Loud, Enrico Rinaldi, Balint Joo, Pavlos Vranas, Kostas Orginos, Chris Bouchard, Nicolas Garron

Publikováno v: Chang, CC; Nicholson, AN; Rinaldi, E; Berkowitz, E; Garron, N; Brantley, DA; et al.(2018). A per-cent-level determination of the nucleon axial coupling from quantum chromodynamics. Nature, 558(7708), 91-94. doi: 10.1038/s41586-018-0161-8. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/1x31v769
Nature / Physical science 558(7708), 91-94 (2018). doi:10.1038/s41586-018-0161-8
Nature, vol 558, iss 7708
NATURE

The $\textit{axial coupling of the nucleon}$, $g_A$, is the strength of its coupling to the $\textit{weak}$ axial current of the Standard Model of particle physics, in much the same way as the electric charge is the strength of the coupling to the el

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ff05ac63ff282d692ef59e794c4023d
http://www.escholarship.org/uc/item/1x31v769

Neutral kaon mixing beyond the Standard Model with n f = 2 + 1 chiral fermions. Part 2: non perturbative renormalisation of the Δ F = 2 four-quark operators

Autor: The RBC/UKQCD collaboration, Peter A. Boyle, Nicolas Garron, Renwick J. Hudspith, Christoph Lehner, Andrew T. Lytle

Publikováno v: Journal of High Energy Physics
Journal of High Energy Physics, Vol 2017, Iss 10, Pp 1-38 (2017)

We compute the renormalisation factors (Z-matrices) of the ΔF = 2 four-quark operators needed for Beyond the Standard Model (BSM) kaon mixing. We work with n f = 2+1 flavours of Domain-Wall fermions whose chiral-flavour properties are essential to m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2392724173662f826093e3b4e4f1ffa9
http://repo.scoap3.org/api

Nucleon axial coupling from Lattice QCD

Autor: Thorsten Kurth, Henry Monge-Camacho, David Brantley, Balint Joo, Christopher Monahan, Pavlos Vranas, Chris Bouchard, Andre Walker-Loud, Kostas Orginos, Enrico Rinaldi, Nicolas Garron, Chia Cheng Chang, Amy Nicholson, Evan Berkowitz, Michael A. Clark

Publikováno v: The 35th International Symposium on Lattice Field Theory, LATTICE2016, Granada, Spain, 2017-06-18-2017-06-24
EPJ Web of Conferences, Vol 175, p 01008 (2018)
EPJ Web of Conferences

We present state-of-the-art results from a lattice QCD calculation of the nucleon axial coupling, $g_A$, using M\"obius Domain-Wall fermions solved on the dynamical $N_f = 2 + 1 + 1$ HISQ ensembles after they are smeared using the gradient-flow algor

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::edf4b744fc55188a8e94d9ed07f44173
https://hdl.handle.net/2128/17014