Electron-Positron annihilation into four charged pions and the a1 rho pi lagrangian

@article{43246,
   author = {Juráň, Josef and Lichard, Peter},
   article_location = {US - Spojené státy americké},
   article_number = {76},
   doi = {http://dx.doi.org/10.1103/PhysRevD.76.094030},
   keywords = {electron-positron annihilation, a1 rho pi Lagrangian, cross section},
   language = {eng},
   issn = {1550-7998},
   journal = {Physical Review D},
   title = {Electron-Positron annihilation into four charged pions and the a1 rho pi lagrangian},
   volume = {2007},
   year = {2007}
}

TY  - JOUR
ID  - 43246
AU  - Juráň, Josef - Lichard, Peter
PY  - 2007
TI  - Electron-Positron annihilation into four charged pions and the a1 rho pi lagrangian
JF  - Physical Review D
VL  - 2007
IS  - 76
SN  - 15507998
KW  - electron-positron annihilation, a1 rho pi Lagrangian, cross section
N2  - The excitation curve of e+e- annihilation into four charged pions in the rho(770) region is calculated using three existing models with rho mesons and pions in intermediate states supplemented by Feynman diagrams with the a1(1260) pi intermediate states.A two-term phenomenological Lagrangian of the a1 rho pi interaction is used. The mixing angle is determined by fitting the e+e- -> pi+pi-pi+pi- cross section data. It is shown that the inclusion of the a1 pi intermediate states succeeds in obtaining a good agreement with the data on both cross section and the rho -> pi+pi-pi+pi- decay width. When moving to energies above 1 GeV, the rho(1450) and rho(1700) resonances are taken into account to get excellent agreement with the BABAR data over the full energy range up to 4.5 GeV.
ER  - 

JURÁŇ, Josef a Peter LICHARD. Electron-Positron annihilation into four charged pions and the a1 rho pi lagrangian. \textit{Physical Review D}. US - Spojené státy americké, 2007, roč.~2007, č.~76, 12 s. ISSN~1550-7998. Dostupné z: https://dx.doi.org/10.1103/PhysRevD.76.094030.