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Perioperative posterior ischemic optic neuropathy (PION) after open aortic surgery
Annals 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
Pion gas viscosity at low temperature and density [PDF]
, 2001 By using Chiral Perturbation Theory and the Uehling-Uhlenbeck equation we compute the viscosity of a pion gas, in the low temperature and low density regime, in terms of the temperature, and the pion fugacity.
A. Dobado +9 more
core +3 more sources
Physical Review Letters, 1959 In order to study the direct interaction of the incident pion with a virtual pion in the meson cloud surrounding a nucleon, the reaction pi + p yields pi /sup +/ + pi /sup -/ + n was investigated in the energy range from 260 to 430 Mev. Negative pion beams impinged on a 4-in.thick liquid hydrogen target.
Perkins, Walton A. +4 more
openaire +2 more sources
Consistency checks of different pion-pion scattering data sets using forward dispersion relations [PDF]
, 2005 We review our evaluation of forward dispersion relations for direct fits to the different, and often conflicting, pion-pion scattering experimental analyses.
Pelaez, J. R.
core +3 more sources
Physical Review, 1960 A liquid hydrogen target was bombarded by negative pions of energies 260. 317, 371, and 427 Mev. Positive pions from the reaction pi /sup -/ + p yields pi /sup +/ + pi /sup -/ + n were dete cted by the use of a counter telescope, that selected the pi /sup +/ by its characteristic pi - mu decay.
Perkins, Walton A. +3 more
openaire +2 more sources
Nature, 1976 Pion-Pion Interactions in Particle Physics. By B. R. Martin, D. Morgan and G. Shaw. Pp. xi+460. (Academic: London and New York, May 1976.) £16; $40.50.
openaire +1 more source
In-medium pion valence distributions in a light-front model
Physics Letters B, 2017 Pion valence distributions in nuclear medium and vacuum are studied in a light-front constituent quark model. The in-medium input for studying the pion properties is calculated by the quark-meson coupling model.
J.P.B.C. de Melo, K. Tsushima, I. Ahmed
doaj +1 more source
Pion Propagation near the QCD Chiral Phase Transition [PDF]
, 2001 We point out that, in analogy with spin waves in antiferromagnets, all parameters describing the real-time propagation of soft pions at temperatures below the QCD chiral phase transition can be expressed in terms of static correlators.
B. D. Josephson +21 more
core +2 more sources
Reviews of Modern Physics, 1961 Pion-pion interactions in pi -N processes are discussed, using a pi / sup +/ and pi /sup -/ beam at 1.03 Bev/c. (L.T.W.)
Anderson, Jerry A. +4 more
openaire +2 more sources
Pion-pion scattering amplitude [PDF]
Physical Review D, 2005 We obtain reliable ππ scattering amplitudes consistent with experimental data, both at low and high energies, and fulfilling appropriate analyticity properties. We do this by first fitting experimental low energy [s^(1/2) ≤ (1.42 GeV] phase shifts and inelasticities with expressions that incorporate analyticity and unitarity.
Peláez Sagredo, José Ramón +1 more
openaire +3 more sources