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${{\mathit f}_{{{2}}}{(1270)}}$ $\Gamma\mathrm {(i)}{}\Gamma\mathrm {({{\mathit \gamma}} {{\mathit \gamma}})}/\Gamma\mathrm {(total)}$

Helicity-0/Helicity-2 RATIO IN ${{\mathit \gamma}}$ ${{\mathit \gamma}}$ $\rightarrow$ ${{\mathit f}_{{{2}}}{(1270)}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$

INSPIRE   PDGID:

M005HR0

VALUE ($ 10^{-2} $) DOCUMENT ID TECN  COMMENT $3.7$ $\pm0.3$ ${}^{+15.9}_{-2.9}$ UEHARA 2008 A BELL 10.6 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ • • We do not use the following data for averages, fits, limits, etc. • • $9.5$ $\pm1.8$ 1 DAI 2014 A RVUE Compilation $13$ 2, 3 PENNINGTON 2008 RVUE Compilation $26$ 4, 3 PENNINGTON 2008 RVUE Compilation 1  Based on a $\mathit K$-matrix analysis of BELLE data from MORI 2007, UEHARA 2008A, UEHARA 2009 and UEHARA 2013. The width is derived for the pole on the third sheet which is closest to the physical axis. 2  Solution A (preferred solution based on ${{\mathit \chi}^{2}}$-analysis). 3  Dispersion theory based amplitude analysis of BOYER 1990, MARSISKE 1990, BEHREND 1992, and MORI 2007. 4  Solution B (worse than solution A; still acceptable when systematic uncertainties are included).

References

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