https://doi.org/10.1140/epja/i2013-13052-5
Regular Article - Theoretical Physics
Three methods to detect the predicted 
scalar meson X(3700)
Departamento de Fısica Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigación de Paterna, Apartado 22085, 46071, Valencia, Spain
* e-mail: xiaochw@ific.uv.es
Received:
5
February
2013
Revised:
28
March
2013
Accepted:
4
April
2013
Published online:
25
April
2013
In analogy to the f
0(500), which appears as a ππ resonance in chiral unitary theory, and the f
0(980), which appears as a quasibound 
state, the extension of this approach to the charm sector also predicts a quasibound state with mass around 3720 MeV, named as X(3700), for which some experimental support is seen in the 
reaction close to the threshold. In the present work we propose three different experiments to observe it as a clear peak. The first one is the radiative decay of the ψ(3770), ψ(3770) → γX(3700) → γηη′. The second one proposes the analogous reaction ψ(4040) → γX(3700) → γηη′ and the third reaction is the e
+
e− → J/ψX(3700) → J/ψηη′. Neat peaks are predicted for all the reactions and the calculated rates are found within measurable range in present facilities.
© SIF, Springer-Verlag Berlin Heidelberg, 2013
