Comment on "Role of heavy meson exchange in near threshold N N --> d pi"

Abstract

In a recent paper by C. J. Horowitz (Phys. Rev. C {\bf 48}, 2920 (1993)) a heavy meson exchange is incorporated into threshold NN --> d pi to enhance the grossly underestimated cross section. However, that calculation uses an unjustified assumption on the initial and final momenta, which causes an overestimate of this effect by a factor of 3--4. I point out that the inclusion of the Delta(1232) isobar increases the cross section significantly even at threshold.

7 pages, figures by fax or mail from [email protected]

Cited by in corpus (24)

• The $pp\to pp{\pi }^0$ Reaction near Threshold: A Chiral Power Counting Approach
• Towards a field theoretic understanding of NN->NNpi
• Pionic deuterium
• Role of the $\Delta$ isobar in the reaction $NN\to NN\pi$ near threshold
• Charge Symmetry Violation in $pn\to d{\pi }^0$ as a Test of Chiral Effective Field Theory
• Complete next-to-leading order calculation for pion production in nucleon-nucleon collisions at threshold
• The reactions $pp\to pp{\pi }^0$ and $pp\to d{\pi }^{+}$ at threshold: The role of the isoscalar $\pi N$ scattering amplitude
• The N N -> NN pi+ Reaction near Threshold in a Chiral Power Counting Approach
• $NN\to NN\pi$ reaction near threshold in a covariant one-boson-exchange model
• Realistic Few-Body Physics in the $dd\to \alpha {\pi }^0$ Reaction
• The near threshold N N -> d pi reaction in chiral perturbation theory
• Precision determination of the dpi -> NN transition strength at threshold
• Effective Field Theory calculations of $NN\to NN\pi$
• Pion production in nucleon-nucleon collisions in chiral effective field theory: next-to-next-to-leading order contributions
• Pion production in nucleon-nucleon collisions in chiral effective field theory with Delta(1232)-degrees of freedom
• Charge dependence of $NN\to d\pi$
• Positive pion absorption on 3He using modern trinucleon wave functions
• Partially conserved axial current constraints on pion production/absorption within nonrelativistic dynamics
• Pion reactions on two--nucleon systems
• Chiral perturbation theory calculation for pn -> dpipi at threshold
• Importance of d-wave contributions in the charge symmetry breaking reaction $dd\to {}^4\text{He}{\pi }^0$
• pp <-> pi+ d process at low energy: Interplay between s-- and p-wave mechanisms
• Charged and neutral pion production in the S-matrix approach
• The piNN system - recent progress