Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-06-23
Phys.Rev. D58 (1998) 014011; Erratum-ibid. D58 (1998) 099901
Physics
High Energy Physics
High Energy Physics - Phenomenology
47 pages, 4 figures, Latex, calls the FEYNMAN macropackage for drawing figures
Scientific paper
10.1103/PhysRevD.58.099901
The pionium decay width is evaluated in the framework of chiral perturbation theory and the relativistic bound state formalism of constraint theory. Corrections of order O(\alpha) are calculated with respect to the conventional lowest-order formula, in which the strong interaction amplitude has been calculated to two-loop order with charged pion masses. Strong interaction corrections from second-order perturbation theory of the bound state wave equation are found to be of the order of 0.4%. Electromagnetic radiative corrections, due to pion-photon interactions, are estimated to be of the order of -0.1%. Electromagnetic mass shift insertions in internal propagators produce a correction of the order of 0.3%. The correction due to the passage from the strong interaction scattering amplitude evaluated with the mass parameter fixed at the charged pion mass to the amplitude evaluated with the mass parameter fixed at the neutral pion mass is found to be of the order of 6.4%.
Jallouli Hassen
Sazdjian Hagop
No associations
LandOfFree
Relativistic effects in the pionium lifetime does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Relativistic effects in the pionium lifetime, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Relativistic effects in the pionium lifetime will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-337463