[Hadstruct] [EXTERNAL] Re: Proposed abstracts for Lattice 2021

[Md Tanjib Atique Khan]

Dear all,

Here is my abstract for Lattice21.

Title: Calculation of the Gluon PDF using Pseudo-PDF technique

Abstract:

We present our calculation of the unpolarized gluon parton
distribution function (PDF) in the nucleon using Pseudo-PDF technique
on a $32^3 \times 64$
isotropic lattice with a pion mass of 358 MeV. The nucleon
interpolating fields are constructed using the distillation method
while the sGEVP method is
used to calculate the gluonic matrix elements. We implement the
gradient-flow technique to compute the flowed matrix elements and
using the double ratio,
calculate the flowed reduced Ioffe-time distribution (rITD). We
extrapolate the results to the flow-time independent rITD and
calculate the light-cone ITD
in $\overline{MS}$ scheme, at the small z-separation limit, using NLO
matching formula. Finally, the gluon PDF is calculated from the
light-cone ITD by
applying appropriate kernel form.

Thanks,

Tanjib


On Wed, Apr 28, 2021 at 5:55 PM Savvas Zafeiropoulos <savvaslz at gmail.com>
wrote:

> Dear All,
>
> here is my abstract and title for lattice 2021
>
> *Progress on the extraction of parton distributions from Ioffe time
> distributions*
>
> The light-cone definition of Parton Distribution Functions (PDFs) does not
> allow for a direct ab initio determination employing methods of Lattice QCD
> simulations that naturally take place in Euclidean spacetime. In this
> presentation we focus on pseudo-PDFs where the starting point is the equal
> time hadronic matrix element with the quark and anti-quark fields separated
> by a finite distance. We focus on Ioffe-time distributions, which are
> functions of the Ioffe-time ν, and can be understood as the Fourier
> transforms of parton distribution functions with respect to the momentum
> fraction variable x. We present lattice results for the case of the nucleon
> addressing the physical point and continuum extrapolations. We also
> incorporate our lattice data in the NNPDF framework treating them on the
> same footing as experimental data and discuss in detail the different
> sources of systematics in the determination of the non-singlet PDFs.
>
> Since I am going to present results from three published papers all the
> authors of those papers will be contributors for my talk in the indico
> website.
> If anyone has a suggestion/correction etc please let me know!
>
> Best,
> Savvas
>
> On Wed, Apr 28, 2021 at 3:55 PM Raza Sufian <sufian at jlab.org> wrote:
>
>> Dear All,
>>
>> Below please find the proposed abstracts for the Lattice 2021 conference.
>> The deadline for abstract submission is on Friday, April 30. Please try to
>> circulate your abstracts sometime tomorrow for comments. Please let us know
>> if I forgot to list any other proposed abstract.
>>
>> CK: Nucleon valence distribution using distillation
>>
>> SZ: Nucleon valence distribution (continuum limit, physical point
>> extrapolation + NNPDF analysis)
>>
>> TK: Unpolarized gluon distribution
>>
>> JK: RBC/UKQCD
>>
>> NK: Transversity
>>
>> RSS: Polarized gluon distribution
>>
>> WM: Perturbative matching for …
>>
>>
>> *TBD:*
>>
>> Patrick Barry
>>
>> CE
>>
>> Thank you.
>> -Raza
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