<div dir="auto">Hi Colin,<div dir="auto"><br><div dir="auto">Congrats! And thanks a lot for everything!</div><div dir="auto"><br></div><div dir="auto">Best wishes,</div><div dir="auto">Savvas</div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Mar 20, 2023, 3:28 PM Colin Egerer via Hadstruct <<a href="mailto:hadstruct@jlab.org">hadstruct@jlab.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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Hi All,</div>
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As the title states, the quark helicity paper is published now with JHEP:</div>
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<a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__link.springer.com_article_10.1007_JHEP03-282023-29086&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=phC8jtUHUVIl1OXaA25HKnc5L16EvLwhrqx4rXYGPWA&m=e9wlsiJelP2iwXfZCn3zdX1HH4tStmDZGOdaZlh9u-4vlU9Q-8kcDxokkTTTBtB9&s=UaHvIAArYCw3X4hyCcrwWmbBOhjW1CvYhS61_hwT5Cg&e=" id="m_-7521506324135608715LPlnkOWALinkPreview" target="_blank" rel="noreferrer">https://link.springer.com/article/10.1007/JHEP03(2023)086</a></div>
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<a id="m_-7521506324135608715LPImageAnchor164942" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__link.springer.com_article_10.1007_JHEP03-282023-29086&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=phC8jtUHUVIl1OXaA25HKnc5L16EvLwhrqx4rXYGPWA&m=e9wlsiJelP2iwXfZCn3zdX1HH4tStmDZGOdaZlh9u-4vlU9Q-8kcDxokkTTTBtB9&s=UaHvIAArYCw3X4hyCcrwWmbBOhjW1CvYhS61_hwT5Cg&e=" target="_blank" rel="noreferrer"><img id="m_-7521506324135608715LPThumbnailImageId164942" alt="" style="display:block" width="112" height="160" src="https://media.springernature.com/w200/springer-static/cover/journal/13130.jpg"></a></div>
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<a id="m_-7521506324135608715LPUrlAnchor164942" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__link.springer.com_article_10.1007_JHEP03-282023-29086&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=phC8jtUHUVIl1OXaA25HKnc5L16EvLwhrqx4rXYGPWA&m=e9wlsiJelP2iwXfZCn3zdX1HH4tStmDZGOdaZlh9u-4vlU9Q-8kcDxokkTTTBtB9&s=UaHvIAArYCw3X4hyCcrwWmbBOhjW1CvYhS61_hwT5Cg&e=" style="text-decoration:none;color:var(--themePrimary)" target="_blank" rel="noreferrer">Non-singlet quark helicity PDFs of the nucleon from pseudo-distributions - Journal of High
Energy Physics</a></div>
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The non-singlet helicity quark parton distribution functions (PDFs) of the nucleon are determined from lattice QCD, by jointly leveraging pseudo-distributions and the distillation spatial smearing paradigm. A Lorentz decomposition of appropriately isolated
space-like matrix elements reveals pseudo-distributions that contain information on the leading-twist helicity PDFs, as well as an invariant amplitude that induces an additional z2 contamination of the leading-twist signal. An analysis of the short-distance
behavior of the space-like matrix elements using matching coefficients computed to next-to-leading order (NLO) exposes the desired PDF up to this additional z2 contamination. Due to the non-conservation of the axial current, we elect to isolate the helicity
PDFs normalized by the nucleon axial charge at the same scale μ2. The leading-twist helicity PDFs as well as several sources of systematic error, including higher-twist effects, discretization errors, and the aforementioned z2 contaminating amplitude</div>
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<a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__link.springer.com&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=phC8jtUHUVIl1OXaA25HKnc5L16EvLwhrqx4rXYGPWA&m=e9wlsiJelP2iwXfZCn3zdX1HH4tStmDZGOdaZlh9u-4vlU9Q-8kcDxokkTTTBtB9&s=b4GFXhbSbikR6kffauCEivmPcPX7cXHYhZmjR8VA_L4&e=" target="_blank" rel="noreferrer">link.springer.com</a></div>
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Best,</div>
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Colin<br>
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