This article has an erratum: [erratum]

Issue
EPL
Volume 88, Number 2, October 2009
Article Number 23001
Number of page(s) 5
Section Atomic, Molecular and Optical Physics
DOI http://dx.doi.org/10.1209/0295-5075/88/23001
Published online 03 November 2009
EPL, 88 (2009) 23001
DOI: 10.1209/0295-5075/88/23001

Multiphoton effects in three-body recombination for antihydrogen formation

S. Ghosh Deb and C. Sinha

Department of Theoretical Physics, Indian Association for the Cultivation of Science Jadavpur, Kolkata - 700 032, India

chand_sin@hotmail.com

received 26 August 2009; accepted in final form 29 September 2009; published October 2009
published online 3 November 2009

Abstract
Laser-assisted multiphoton cross-sections for the formation of antihydrogen $(\bar H)$ via the three-body recombination (TBR) process in a plasma of antiprotons ($\bar p$'s) and positrons (e+'s) are studied for the ground and excited states (n = 2 level). Significantly large enhancement is noted due to multiphoton effects particularly in the ground-state formation cross-section at lower incident energies with respect to the field-free case. The multiphoton ground-state cross-section dominates almost throughout the energy range (except at extreme low energies) in contrast to the field-free case. The formation cross-sections are found to be much higher for unequal energies of the two incident (active and spectator) e+'s than for equal energies.

PACS
34.50.Rk - Laser-modified scattering and reactions.
32.80.Wr - Other multiphoton processes.

© EPLA 2009