Neutral pion electroproduction off deuterium
نویسندگان
چکیده
Threshold neutral pion electroproduction on the deuteron is studied in the framework of baryon chiral perturbation theory at next-to-leading order in the chiral expansion. To this order in small momenta, the amplitude is finite and a sum of twoand three-body interactions with no undetermined parameters. We calculate the S-wave multipoles for threshold production and the deuteron S-wave cross section as a function of the photon virtuality. We also discuss the sensitivity to the elementary neutron amplitudes.
منابع مشابه
New developments in threshold pion photo- and electroproduction
Photoproduction of neutral and charged pions off nucleons and deuterium has been precisely calculated in baryon chiral perturbation theory. I review the predictions in light of the accurate data that have become available over the last few years. Some progress in the description of neutral pion electroproduction off protons is also discussed.
متن کاملNear threshold neutral pion electroproduction on deuterium in chiral perturbation theory
Near threshold neutral pion electroproduction on the deuteron is studied in the framework of baryon chiral perturbation theory at next–to–leading order in the chiral expansion. We develop the multipole decomposition for pion production off spin-1 particles appropriate for the threshold region. The existing data at photon virtuality k = −0.1GeV can be described satisfactorily. Furthermore, the p...
متن کاملOn neutral pion electroproduction off deuterium
Threshold neutral pion electroproduction on the deuteron is studied in the framework of baryon chiral perturbation theory at next–to–leading order in the chiral expansion. To this order in small momenta, the amplitude is finite and a sum of two– and three–body interactions with no undetermined parameters. We calculate the S–wave multipoles for threshold production and the deuteron S–wave cross ...
متن کاملTHRESHOLD TWO–PION PHOTO – AND ELECTROPRODUCTION: More neutrals than expected
We present an exploratory study of two pion photo– and electroproduction off the nu-cleon in the threshold region. To calculate the pertinent amplitudes, we make use of heavy baryon chiral perturbation theory. We show that due to finite chiral loops the production cross section for final states with two neutral pions is considerably enhanced. The experimental implications are briefly discussed.
متن کاملNeutral-pion electroproduction on the proton near threshold.
The neutral pion electroproduction on the proton is considered in the framework phenomenological model based on the PCAC, current algebra with hard pions and chiral symmetry breaking interaction. The swave differential cross-section of the electroproduction of neutral pions off protons near the threshold is predicted as function photon momentum transfer squared k2 . The swave multipoles ReE0+ a...
متن کامل