Results 31 to 40 of about 210,176 (213)
, 2011 In the framework of the isospin-dependent Boltzmann-Uehling-Uhlenbeck transport model, effect of the momentum dependence of nuclear symmetry potential on pion-/pion+ ratio in the neutron-rich reaction 132Sn+124Sn at a beam energy of 400 MeV/nucleon is ...
Chen, Xi-Meng +4 more
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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
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
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Confinement and cut-off: a model for the pion quark distribution function [PDF]
, 2003 The pion structure function is investigated in a simple pseudo-scalar coupling model of pion and constituent quark fields. The imaginary part of the forward Compton scattering amplitude is evaluated.
Bissey, F. +5 more
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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
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
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Pion Form Factor in Chiral Limit of Hard-Wall AdS/QCD Model
, 2007 We develop a formalism to calculate form factor and charge density distribution of pion in the chiral limit using the holographic dual model of QCD with hard-wall cutoff. We introduce two conjugate pion wave functions and present analytic expressions for
A. V. Radyushkin +7 more
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Pion-pair formation and the pion dispersion relation in a hot pion gas [PDF]
, 1996 The possibility of pion--pair formation in a hot pion gas, based on the bosonic gap equation, is pointed out and discussed in detail. The critical temperature for condensation of pion pairs (Evans--Rashid transition) is determined as a function of the ...
Aouissat +23 more
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Pion Production in Pion Nucleon Scattering and Pion-Pion Interaction [PDF]
Progress of Theoretical Physics, 1962 The reaction pi + N yields 2 pi + N is discussed. The production process is assumed to take place mainly via pi - pi interactions, which are studied using an extrapolation formula (G. F. Chew and F. E. Low, Phys. Rev., 113: 1640 (1959)). A program giving a consistent explanation to the process at 0.3 to 1.5 Bev is presented.
openaire +1 more source