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Article overview
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The analysis of reactions $pi N o two mesons + N$ within reggeon exchanges. 1. Fit and results | | V.V. Anisovich
; A.V. Sarantsev
; | | Date: |
10 Jun 2008 | | Abstract: | The novel point of this analysis is a direct use of reggeon exchange
technique for the description of the reactions $pi N o two mesons + N$ at
large energies of the initial pion. This approach allows us to describe
simultaneously distributions over $M$ (invariant mass of two mesons) and $t$
(momentum transfer squared to nucleons). Making use of this technique, the
following resonances (as well as corresponding bare states), produced in the
$pi N o pi^0pi^0 N$ reaction are studied: $f_0(980)$, $f_0(1300)$,
$f_0(1200-1600)$, $f_0(1500)$, $f_0(1750)$, $f_2(1270)$, $f_2(1525)$,
$f_2(1565)$, $f_2(2020)$, $f_4(2025)$. Adding data for the reactions $par
p({
m at rest, from liquid H_2}) o pi^0pi^0pi^0$, $pi^0pi^0eta$,
$pi^0etaeta$ and $par p({
m at rest, from gaseous H_2}) o
pi^0pi^0pi^0$, $pi^0pi^0eta$, $pi^0etaeta$, we have performed
simultaneous $K$-matrix fits of two-meson spectra in all these reactions. The
results of combined fits to the above-listed isoscalar $f_J$-states and to
isovector ones, $a_0(980)$, $a_0(1475)$, $a_2(1320)$, are presented. | | Source: | arXiv, 0806.1601 | | Services: | Forum | Review | PDF | Favorites | |
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