Effect of light scalar mesons in {eta} {yields} 3{pi}
Conference
·
OSTI ID:824387
We discuss the decay {eta} {yields} 3{pi}, for which the observed branching ratio is larger than the simplest predict ions from chiral symmetry. This process occurs primarily due to strong isospin violation and so is in principle a sensitive measure of the up-down quark mass difference. We study the role of a possible nonet of light scalar mesons in the {eta} {yields} 3{pi} decay. Using a non-linear chiral Lagrangian approach which successfully describes several other strong processes, we find that the inclusion of the scalar mesons leads to a modest increase relative to the simplest prediction. The main effect of the scalar mesons is due to a light broad {sigma} meson.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 824387
- Report Number(s):
- JLAB-THY-03-140; DOE/ER/40150-2661
- Country of Publication:
- United States
- Language:
- English
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