[Hadstruct] Fw: Theory Seminar Monday (remote) - Michael Wagman

[Joseph Karpie]

Hey everyone,

Since you may not all be on the theory group mailing list, please be aware of the virtual seminar JLab is having tomorrow at 1pm on this Lanczos method.

Best,
Joe

________________________________
From: Theory-seminars <theory-seminars-bounces at jlab.org> on behalf of Zheng-Yang Li via Theory-seminars <theory-seminars at jlab.org>
Sent: Friday, September 27, 2024 12:18 PM
To: theory-seminars at jlab.org <theory-seminars at jlab.org>
Subject: [Theory-seminars] Theory Seminar Monday (remote) - Michael Wagman

Dear all,

On Monday, September 30th, 2024 at 1pm EDT, we will have a virtual seminar given by Michael Wagman of Fermilab on the Zoom for Government link:

https://jlab-org.zoomgov.com/j/1609048828?pwd=hwRyzb3PwNzfgmS3OSyrHf6zD3Gerr.1

Please see below for the title and abstract.

Theory Seminar: September 30th, 1pm EDT (virtual)

Speaker: Michael Wagman (Fermilab)

Title: Solving the signal-to-noise problem with Lanczos

Abstract: Lattice quantum chromodynamics (QCD) can provide important theory inputs needed for new physics searches ranging from the muon g-2 to DUNE and other neutrino oscillation experiments. The energy spectrum of QCD, from which hadron masses as well as hadronic scattering cross sections can be derived, is determined in lattice calculations through statistical analysis and fits of imaginary-time correlation functions. This analysis is made challenging by an exponentially severe signal-to-noise problem. The problem worsens for more complex systems and prevents us from robustly predicting many properties of nucleons and nuclei directly from QCD. In this talk I will present a new method for obtaining energy spectra in lattice QCD based on applying the Lanczos algorithm to the transfer matrix. This new Lanczos method does not suffer from exponential signal-to-noise problems and provides rigorous two-sided bounds on systematic uncertainties in its determinations of QCD energy levels.

See you on Monday.

Best regards,
Caroline, Joe, Zheng-Yang, and Gloria

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