The UKLFT Virtual Centre will hold its virtual kick-off meeting on Wednesday 24.03.2021 14h-17h GMT.
Tentative program:
14:00-14:35 Chris Bouchard (Glasgow) — Nucleon Physics with CalLat (slides)
14:35-14:50 Luigi Del Debbio (Edinburgh) — ExaLat (slides)
14:50-15:15 Eugene Lim (KCL) — GRCHOMBO: Numerical Relativity with Adaptive Mesh Refinement (slides)
15:15-15:45 Coffee Break
15:45-16:00 Mark Wilkinson (Leicester, DiRAC) — News from DiRAC (slides)
16:00-16:35 David Schaich (Liverpool) — Broader applications of lattice field theory (slides)
16:35-16:50 Simon Hands (Swansea) — UKLFT
16:50- Discussion
17:00 Close
At the meeting we will also outline plans for the Virtual Centre going forward, including details of how to apply for travel costs to support you research once the pandemic restrictions are eased, and an informal discussion on future activities such as training and workshops.
Further details will be circulated soon, but for now mark the event in your diaries and be sure to pass the news to others your group, including postdocs and PhD students, who might be interested.
Registration link.
Abstracts:
- Chris Bouchard (Glasgow) — Nucleon Physics with CalLat
I will discuss recent, ongoing, and planned efforts I am involved with as part of the California Lattice (CalLat) collaboration. Using an implementation of the Feynman-Hellmann Theorem developed in [1] and a mixed action setup outlined in [2], we are calculating nucleon form factors, e.g. the axial form factor gA(Q^2 <~ 1 GeV^2), relevant to neutrino experiment and to the determination of charge radii, including a QCD prediction of the proton charge radius. These efforts build and improve upon our calculation of the nucleon axial charge gA(Q^2 = 0) in [3] and include recent calculations of the ratio of decay constants fK/fPi [4] and a scale setting via w0 and t0 [5]. Ongoing efforts related to gA(Q^2 <~ 1 GeV^2) include a study of the structure of excited state contributions and in-depth comparisons of data generated via the Feynman-Hellmann Theorem inspired approach and more standard approaches for studying hadronic matrix elements. If time permits, I will discuss possible future efforts related to improving and extending our ongoing calculation of gA(Q^2).
[1] Phys. Rev. D 96 (2017) 1, 014504 [1612.06963]
[2] Phys. Rev. D 96 (2017) 5, 054513 [1701.07559]
[3] Nature 558 (2018) 7708, 91-94 [1805.12130]
[4] Phys. Rev. D 102 (2020) 3, 034507 [2005.04795]
[5] to appear in Phys. Rev. D [2011.12166] - Luigi Del Debbio (Edinburgh, EXALAT)
- Eugene Lim (KCL) — GRCHOMBO : Numerical Relativity with Adaptive Mesh Refinement
I will describe the open-source code GRCHOMBO (www.grchombo.org), which solves Einstein’s equations via finite difference on a grid. One of the key features of GRCHOMBO is its block-structured adaptive mesh capabilities, which allow the code to solve problems with a large dynamical range. I will also describe how we approach the problem of solving gauge fields in numerical relativity. - Mark Wilkinson (Leicester, DiRAC)
- David Schaich (Liverpool) — Broader applications of lattice field theory
In addition to lattice QCD, the non-perturbative framework of lattice field theory is an important tool to analyze broader classes of strongly interacting systems. In this brief overview I will present some broader applications of lattice field theory I’m currently working on with various collaborators. These range from more phenomenological investigations of composite dark matter and composite Higgs models, to more theoretical studies of supersymmetric field theories and holographic gauge–gravity duality.