[Hadstruct] [EXTERNAL] Fw: Lattice Hadron Structure Journal Club @ 2 PM EDT, Friday, 09/17/2021 (Unusual time)

[Monahan, Christopher]

In case anyone is not on the Lattice Hadron Structure Journal Club mailing list...

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Chris Monahan
Pronouns: he/his
Assistant Professor
Department of Physics
William & Mary
757-221-2081
________________________________
From: LatHadron <lathadron-bounces at lists.anl.gov> on behalf of Zhao, Yong via LatHadron <lathadron at lists.anl.gov>
Sent: 11 September 2021 17:47
To: lathadron at lists.anl.gov <lathadron at lists.anl.gov>
Subject: [LatHadron] Lattice Hadron Structure Journal Club @ 2 PM EDT, Friday, 09/17/2021 (Unusual time)

Dear everyone,

We will have our next Lattice Hadron Structure Journal Club at 2 PM EDT, Sep. 17, Friday. This time we have invited Mr. Wei-Yang Liu from Stony Brook University to give a talk.

Date and time: 2 PM EDT, Friday, 09/17/2021
Web page: https://urldefense.proofpoint.com/v2/url?u=https-3A__www.phy.anl.gov_latticeqcd_&d=DwIGIw&c=CJqEzB1piLOyyvZjb8YUQw&r=phC8jtUHUVIl1OXaA25HKnc5L16EvLwhrqx4rXYGPWA&m=qJQotng86BNX20XcCAlaaTu1UGUdRHzy-zv_vvJ8pwY&s=aJEoTw8PWJbyiWcDneOqFc2mr4qALapbethkEpnKZ0s&e= 
Zoom link: https://urldefense.proofpoint.com/v2/url?u=https-3A__argonne.zoomgov.com_j_16020994740-3Fpwd-3DbXJmZms0YUFwcE12aGV0QkFpcHFGUT09&d=DwIGIw&c=CJqEzB1piLOyyvZjb8YUQw&r=phC8jtUHUVIl1OXaA25HKnc5L16EvLwhrqx4rXYGPWA&m=qJQotng86BNX20XcCAlaaTu1UGUdRHzy-zv_vvJ8pwY&s=MkQrMgH1_v3hiregZzF_y8Y5JiBTICVKl6To1zZpL-s&e= 
Passcode: lathadron

Speaker: Wei-Yang Liu (Stony Brook University)
Title: Chiral Perturbation for Large Momentum Effective Field Theory
References:  https://urldefense.proofpoint.com/v2/url?u=https-3A__arxiv.org_abs_2011.13536&d=DwIGIw&c=CJqEzB1piLOyyvZjb8YUQw&r=phC8jtUHUVIl1OXaA25HKnc5L16EvLwhrqx4rXYGPWA&m=qJQotng86BNX20XcCAlaaTu1UGUdRHzy-zv_vvJ8pwY&s=Wk8aJI1K4bFzMrJoof5JxuJlSofQCRutPfPmF-83laM&e= 
Abstract: Large momentum effective field theory (LaMET) enables the extraction of parton distribution functions (PDFs) directly on a Euclidean lattice through a factorization theorem that relates the computed quasi-PDFs to PDFs. We apply chiral perturbation theory (ChPT) to LaMET to further separate soft scales such as light quark masses and lattice size to obtain leading model independent extrapolation formulas for extrapolations to physical quark masses and infinite volume. We find that the finite volume effect is reduced when the nucleon carries a finite momentum. For nucleon momentum greater than 1 GeV and the lattice size L and pion mass mπ satisfying mπL≥3 the finite volume effect is less than 1% and is negligible for the current precision of lattice computations. This can be interpreted as a Lorentz contraction of the nucleon size in the z-direction which makes the lattice size effectively larger in that direction. We also find that the quark mass dependence in the infinite volume limit computed with non-zero nucleon momentum reproduces the previous result computed at zero momentum as expected. Our approach can be generalized to other parton observables in LaMET straight forwardly.

Discussion Panel: Christopher Monahan (The College of William & Mary).


We encourage you to read the reference and prepare any auxiliary material that can facilitate the discussion. If possible, please also help us share this information with those who may have not been reached out in your group.

We are looking forward to seeing you next week!


Best regards,

Yong and Ian
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