[Hadstruct] [EXTERNAL] LaMET2020 abstracts

[Joseph Karpie]

Yong has told me that everyone one needs to resubmit their abstracts since
the announcement of the new date, so presumably what you had sent in
January has been lost to the ether.

On Thu, Aug 13, 2020 at 3:38 PM Monahan, Christopher <cjmonahan at wm.edu>
wrote:

> Hi all
>
> Joe, thank you for suggesting this. My abstract, submitted a few days ago,
> is
>
> Connecting quasi and pseudo distributions in nongauge theories
>
> "I explore the explicit relationship between the LaMET and pseudo-PDF
> approaches to collinear hadron structure in the context of a scalar theory,
> and demonstrate explicitly their equivalence at one loop in perturbation
> theory. Scalar field theory removes complications associated with gauge
> theories that enable complete calculations of all quantities, such as the
> Ioffe-time distribution at arbitrary field separation, and demonstrate
> explicitly their interrelationships. This provides the ideal playground for
> analysing and clarifying the main features of both quasi- and pseudo-PDFs."
>
> Apparently I was so on top of things back in January that this is actually
> the second abstract I submitted. I had forgotten about the first (I mean
> it's not like anything major has happened since January 29th), and it is
>
> Finite volume effects for extended operators, vol. 2
>
> "Lattice determinations of parton distribution functions are now
> sufficiently mature that a proper accounting of systematic uncertainties is
> necessary for further progress. These determinations generally rely on
> nonperturbative calculations of matrix elements of spatially-extended
> operators, which may have enhanced finite volume effects relative to matrix
> elements of local operators. I present a dispersive technique for
> determining finite-volume effects associated with spatially-separated
> current operators. This framework would enable nonperturbative removal of
> the dominant finite volume effects given previously-determined lattice form
> factors. In this work we focus on the implications for the matrix elements
> of the pion, but the framework may be generalized to other states."
>
> Regards,
> Chris
>
> ---
>
> Chris Monahan
> Pronouns: he/his
> Assistant Professor
> Department of Physics
> William & Mary
> ------------------------------
> *From:* Hadstruct <hadstruct-bounces at jlab.org> on behalf of Joseph Karpie
> <jkarpie at gmail.com>
> *Sent:* 13 August 2020 16:26
> *To:* hadstruct at jlab.org <hadstruct at jlab.org>
> *Subject:* [Hadstruct] [EXTERNAL] LaMET2020 abstracts
>
> Hey everyone,
>
> Since we only have a few days left, I'd like to try to organize our
> abstracts for LaMET 2020 those who haven't sent them in already. Since
> there are a limited number of talks, we decided we should send in a number
> of abstracts and make them reject us. I figure if we try to make our
> abstracts overlap as little as possible, it will remove the excuse of
> repetition they could use to reject us off hand. Below is what I will send
> in. Can everyone who is thinking of sending in abstracts copy theirs so we
> can think about what to focus on?
>
> Below is my abstract where I plan to highlight the pseudo-PDF method and
> our latest results. I plan on discussing its distinctions from LaMET, but
> don't want that in the abstract as to not draw unnecessary ire. I've also
> pasted a link to my AP Latt talk which will be a basis for my slides.
> Please send me any comments on my abstract or slides.
>
> Best,
> Joe
>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__conference-2Dindico.kek.jp_event_113_contributions_2114_&d=DwIFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=phC8jtUHUVIl1OXaA25HKnc5L16EvLwhrqx4rXYGPWA&m=KZCO-ayzMyl6omPCYk7EP2-gk90g1nGqpgp7uhgm16U&s=1M5a_HlLkz9lCGW3CBGfn5DQs8jwPld4lS0rbFSF7aU&e= 
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__conference-2Dindico.kek.jp_event_113_contributions_2114_&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=phC8jtUHUVIl1OXaA25HKnc5L16EvLwhrqx4rXYGPWA&m=TGMha416R7BmOZMpXjw-2yH_zE6H5IzqLmrNh24zaY4&s=7ADZ15S4-hD9vzOCwQTUE2tXw5wF18i512VJga0A7gQ&e=>
>
> In this presentation, we focus on the pseudo-PDF method of calculating
> parton distributions. We use a Euclidean space matrix element, called the
> Ioffe-time pseudo distribution, and Short Distance Factorization, which
> allows data from all momenta to contribute in the analysis, to obtain
> parton distributions. We present the latest lattice results from the
> HadStruc collaboration, discuss several lattice systematics, discuss the
> inverse problem universal to PDF determinations, and perform a comparison
> with the pertinent phenomenological determinations.
>
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