https://doi.org/10.1140/epjd/e2004-00125-0
Kinetic energy distributions in pionic hydrogen
Laboratoire Kastler–Brossel,
École Normale Supérieure et Université Pierre et Marie Curie,
Case 74,
4 place Jussieu,
75252 Paris Cedex 05, France
Corresponding author: a Thomas.Jensen@spectro.jussieu.fr
Received:
17
June
2004
Revised:
6
August
2004
Published online:
28
September
2004
A framework for analyzing the Doppler broadening of the X–ray lines in pionic
hydrogen is proposed. It is shown that the kinetic energy distributions at the instant
of the 
(
) radiative transitions are related to each other.
In order to establish the connection, the collisional processes for pionic hydrogen
scattering from hydrogen atoms and molecules have been calculated in different
models.
The proposed method can be used to determine reliably the
strong interaction width of the ground state of pionic hydrogen
from the X–ray line profiles measured recently at the
Paul–Scherrer–Institut.
PACS: 34.50.-s – Scattering of atoms and molecules / 36.10.Gv – Mesonic atoms and molecules, hyperonic atoms and molecules
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004
