Role of Light Scalar Mesons in eta, eta [prime] --> 3 pi
Conference
·
OSTI ID:836555
We study the role of a light scalar nonet in the interesting decay eta --> 3 pi. The framework is a Chiral effective Lagrangian of pseudo-scalars, scalars and vectors. At leading order, the scalars increase the predicted width by about 14%. We note that although individual scalar contributions are not small, there are cancellations among the scalar diagrams. Including higher order symmetry breaking terms reduce the amount of cancellations among the scalar diagrams but the total predicted width remain the same. The vectors contribution is found to be very small. A preliminary discussion of the related decay eta --> 3 pi is given. We found that the leading order results of pseudo-scalars alone are reasonable and close to the experimental data. Including the scalars or the vectors gives a huge enhancement indicating the importance of higher order corrections in this case.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
- Sponsoring Organization:
- US Department of Energy; USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 836555
- Report Number(s):
- JLAB-THY-03-43; DOE/ER/40150-3104
- Country of Publication:
- United States
- Language:
- English
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