Results 21 to 30 of about 221,719 (219)
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
Progress of Theoretical Physics, 1962 The modified effective range formulas for S- and P-wave pion-pion scattering which contain the effect of nucleon closed loops are derived using the chain approximation. These are extensions along the lines of Chew and Mandelstam, and Okubo and Miyamoto.
Shin Ishida, Kazo Nakazawa
openaire +1 more source
Determination of the pion-nucleon coupling constant and scattering lengths [PDF]
, 2000 We critically evaluate the isovector GMO sum rule for forward pion-nucleon scattering using the recent precision measurements of negatively charged pion-proton and pion-deuteron scattering lengths from pionic atoms.
A. A. Carter +80 more
core +4 more sources
Generalized parton distributions of pion for non-zero skewness in AdS/QCD
Nuclear Physics B, 2018 We study the generalized parton distributions (GPDs) of pion for non-zero skewness by considering the leading |qq¯〉 Fock state component. Inspired from AdS/QCD light-front wave functions, we calculate the pion GPDs.
Navdeep Kaur +3 more
doaj +1 more source
Chiral Symmetry Restoration and Pion Interaction in Nuclear Matter [PDF]
, 1998 This paper is devoted to the interplay between p-wave, s-wave pion-nucleon/ nucleus interaction and in-medium pion-pion interaction with special emphasis on the role of the nuclear pionic scalar density driving a large amount of chiral symmetry ...
Chanfray, Guy, Davesne, Dany
core +3 more sources
Pion wave-function as a bound system in 3 + 1 dimensional QCD
Results in Physics, 2017 We investigate the Bethe-Salpeter-like amplitude in 3 + 1 dimensions. This involves a system comprising a quark and an antiquark combined by gauge fields to satisfy gauge invariance. We derive the equation of motion for this system and construct a series
Teruo Kurai
doaj +1 more source
The investigation of K+π−, π+K− and π+π− atoms
EPJ Web of Conferences, 2016 Theory, using Low Energy QCD, predicts with high precision the pion-pion and pion-kaon scattering lengths. There is accurate relation between K+π− and π+K− atoms lifetime and pion-kaon S-wave scattering lengths with isospin 1/2 and 3/2.
Yazkov Valeriy
doaj +1 more source
Evaluation of the Axial Vector Commutator Sum Rule for Pion-Pion Scattering
, 2007 We consider the sum rule proposed by one of us (SLA), obtained by taking the expectation value of an axial vector commutator in a state with one pion. The sum rule relates the pion decay constant to integrals of pion-pion cross sections, with one pion ...
F. J. Ynduráin +3 more
core +1 more source
Vector form factor of the pion : A model-independent approach [PDF]
, 2002 We study a model-independent parameterization of the vector pion form factor that arises from the constraints of analyticity and unitarity. Our description should be suitable up to s^(1/2) ~ 1.2 GeV and allows a model-independent determination of the ...
A. Pich +26 more
core +3 more sources
Pion-Pion Interaction and Pion Production in Pion-Nucleon Collision [PDF]
Progress of Theoretical Physics, 1960 The evidence for the n;-n; interaction is investigated by considering the angular distribution of nucleon in pion production by pion-nucleon collision. It is shown that it will be quite difficult to understand the sharp forward angular distribution of nucleon without considering n;-n; interaction.
openaire +1 more source