Results 31 to 40 of about 274,150 (265)

Pion valence structure from Ioffe-time parton pseudodistribution functions [PDF]

open access: yesPhysical Review D, 2019
We present a calculation of the pion valence quark distribution extracted using the formalism of reduced Ioffe-time pseudodistributions or more commonly known as pseudo-PDFs.
B. Jo'o   +6 more
semanticscholar   +1 more source

I=3 Three-Pion Scattering Amplitude from Lattice QCD. [PDF]

open access: yesPhysical Review Letters, 2019
We analyze the spectrum of two- and three-pion states of maximal isospin obtained recently for isosymmetric QCD with pion mass M≈200  MeV in Hörz and Hanlon, [Phys. Rev. Lett. 123, 142002 (2019)PRLTAO0031-900710.1103/PhysRevLett.123.142002].
T. Blanton, F. Romero-López, S. Sharpe
semanticscholar   +1 more source

Perioperative posterior ischemic optic neuropathy (PION) after open aortic surgery

open access: yesAnnals of Vascular Surgery - Brief Reports and Innovations, 2022
Perioperative posterior ischemic optic neuropathy (PION) is a rare but potentially devastating condition. A correlation of PION with major surgical procedures has been established, particularly in cases of spine and cardiovascular surgery.
Jonathan Lovis   +5 more
doaj   +1 more source

Two- and Three-Pion Finite-Volume Spectra at Maximal Isospin from Lattice QCD. [PDF]

open access: yesPhysical Review Letters, 2019
We present the three-pion spectrum with maximal isospin in a finite volume determined from lattice QCD, including excited states in addition to the ground states across various irreducible representations at zero and nonzero total momentum.
B. Hörz, Andrew D. Hanlon
semanticscholar   +1 more source

Pion and kaon parton distribution functions from basis light front quantization and QCD evolution [PDF]

open access: yesPhysical Review D, 2019
We investigate the parton distribution functions (PDFs) of the pion and the kaon by combining QCD evolution with the basis light front quantization (BLFQ).
Jiangshan Lan   +4 more
semanticscholar   +1 more source

Heavy hadronic molecules with pion exchange and quark core couplings: a guide for practitioners [PDF]

open access: yes, 2019
We discuss selected and important features of hadronic molecules as one of promising forms of exotic hadrons near thresholds. Using examples of $D \bar D^*$ systems such as $X(3872)$ and $Z_c$, emphasis is put on the roles of the one pion exchange ...
Y. Yamaguchi   +3 more
semanticscholar   +1 more source

The Curious Concept That Almost Nobody Seemed to Care About at First: Virtual Particles in the Post-War Period. [PDF]

open access: yesBer Wiss
Abstract Short‐lived, unobservable, and not subject to the usual rules of conservation of energy and momentum, virtual particles—an integral part of the conceptual framework of quantum field theory (QFT)—exhibit a number of curious characteristics which, in recent decades, have in part fueled important discussions about their ontological status ...
Martinez JP.
europepmc   +2 more sources

Drawing insights from pion parton distributions [PDF]

open access: yesChinese Physics C, High Energy Physics & Nuclear Physics, 2019
A symmetry-preserving continuum approach to the two valence-body bound-state problem is used to calculate the valence, glue and sea distributions within the pion; unifying them with, inter alia, electromagnetic pion elastic and transition form factors ...
M. Ding   +5 more
semanticscholar   +1 more source

Valence parton distribution function of pion from fine lattice [PDF]

open access: yesPhysical Review D, 2019
We present a lattice QCD study of valence parton distribution inside the pion within the framework of Large Momentum Effective Theory. We use a mixed action approach with 1-HYP smeared valence Wilson clover quarks on 2+1 flavor HISQ sea with the valence ...
T. Izubuchi   +7 more
semanticscholar   +1 more source

Pion-Pole Contribution to Hadronic Light-By-Light Scattering in the Anomalous Magnetic Moment of the Muon. [PDF]

open access: yesPhysical Review Letters, 2018
The π^{0} pole constitutes the lowest-lying singularity of the hadronic light-by-light (HLBL) tensor, and thus, it provides the leading contribution in a dispersive approach to HLBL scattering in the anomalous magnetic moment of the muon (g-2)_{μ}. It is
M. Hoferichter   +4 more
semanticscholar   +1 more source

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