Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-06-18
Phys.Lett.B682:43-49,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 3 figures
Scientific paper
10.1016/j.physletb.2009.10.090
We consider a description of propagators for particle resonances which takes into account the quantum mechanical interference due to the width of two or more nearby states that have common decay channels, by incorporating the effects arising from the imaginary parts of the one-loop self-energies. Depending on the couplings to the common decay channels, the interference effect, not taken into account in the usual Breit-Wigner approximation, can significantly modify the cross section or make the more long-lived resonance narrower. We give few examples of New Physics models for which the effect is sizable, namely a generic two and multiple Higgs model and neutral vector resonances in Higgsless models. Based on these results we suggest the implementation of a proper treatment of nearby resonances into Monte Carlo generators.
Cacciapaglia Giacomo
Curtis Stefania de
Deandrea Aldo
No associations
LandOfFree
Nearby resonances beyond the Breit-Wigner approximation 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 Nearby resonances beyond the Breit-Wigner approximation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nearby resonances beyond the Breit-Wigner approximation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-725727