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VOLUME 100 (2014) | ISSUE 4 |
PAGE 252
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How learn the branching ratio
N. N. Achasov+, E. V. Rogozina+*
+Laboratory of Theoretical Physics, Sobolev Institute of Mathematics, 630090 Novosibirsk, Russia *Novosibirsk State University, 630090 Novosibirsk, Russia
Abstract
Enfant terrible of charmonium spectroscopy, the
resonance X(3872), generated a stream of interpretations and
ushered in a new exotic XYZ spectroscopy. In the
meantime, many (if not all) characteristics of
X(3872) are rather ambiguous. We construct spectra of decays of
the resonance X(3872) with good analytical and unitary
properties which allows to define the branching ratio of the
decay studying only one more
decay, for example, the X(3872)→π+π- J/ψ(1S) decay.
We next define the range of values of the coupling constant of the
X(3872) resonance with the system. Finally, we
show that our spectra are effective means of selection of models
for the resonance X(3872).
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