Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Nikhil Karthik"'
Autor:
Robert Edwards, Colin Egerer, Joseph Karpie, Nikhil Karthik, Christopher Monahan, Wayne Morris, Kostas Orginos, Anatoly Radyushkin, David Richards, Eloy Romero, Raza Sabbir Sufian, Savvas Zafeiropoulos, on behalf of the HadStruc collaboration
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 3, Pp 1-51 (2023)
Abstract 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 appropr
Externí odkaz:
https://doaj.org/article/022633dc77d846c2a93902c1fb2de33a
Autor:
Nikhil Karthik, Rajamani Narayanan
Publikováno v:
Universe, Vol 8, Iss 6, p 332 (2022)
Overlap fermion on the lattice has been shown to properly reproduce topological aspects of gauge fields. In this paper, we review the derivation of Overlap fermion formalism in a torus of three space-time dimensions. Using the formalism, we show how
Externí odkaz:
https://doaj.org/article/0887726d755e4f7199a7879a48c2b6b3
Autor:
Xiang Gao, Andrew D. Hanlon, Jack Holligan, Nikhil Karthik, Swagato Mukherjee, Peter Petreczky, Sergey Syritsyn, Yong Zhao
Publikováno v:
Physical Review
We present a lattice QCD calculation of the unpolarized isovector quark parton distribution function (PDF) of the proton utilizing a perturbative matching at next-to-next-to-leading-order (NNLO). The calculations are carried out using a single ensemb
Publikováno v:
Physical Review D. 106
Autor:
Xiang Gao, Andrew D. Hanlon, Nikhil Karthik, Swagato Mukherjee, Peter Petreczky, Philipp Scior, Shuzhe Shi, Sergey Syritsyn, Yong Zhao, Kai Zhou
Publikováno v:
Physical Review
We present lattice QCD calculations of valence parton distribution function (PDF) of pion employing next-to-next-leading-order (NNLO) perturbative QCD matching. Our calculations are based on three gauge ensembles of 2+1 flavor highly improved stagger
Autor:
Rajamani Narayanan, Nikhil Karthik
Publikováno v:
Physical Review
We initiate the studies on the structural physics of the tower of stable large-$N_c$ mesons through a first computation of the collinear quark-structure of a large-$N_c$ pion using lattice Monte-Carlo methods. We adapt the large-$N_c$ continuum reduc
Publikováno v:
Physical Review
We present our results on the electromagnetic form factor of pion over a wide range of $Q^2$ using lattice QCD simulations with Wilson-clover valence quarks and HISQ sea quarks. We study the form factor at the physical point with a lattice spacing $a
Autor:
Raza Sabbir Sufian, Nikhil Karthik
Publikováno v:
Physical Review
We propose an analysis method for the leading-twist operator product expansion based lattice QCD determinations of the valence parton distribution function (PDF). In the first step, we determine the confidence-intervals of the leading-twist $\overlin
Publikováno v:
Physical Review
We present an exploratory lattice QCD investigation of the differences between the valence quark structure of pion and its radial excitation $\pi(1300)$ in a fixed finite volume using the leading-twist factorization approach. We present evidences tha
Autor:
Nikhil Karthik
Publikováno v:
Physical Review D. 103
We study the changes in the short-distance quark structure of the Nambu-Goldstone boson when the long-distance symmetry-breaking scales are depleted controllably. We achieve this by studying the valence parton distribution function (PDF) of pion in $