https://doi.org/10.1051/epjconf/201612504002
Physics of the charmonium-like state X(3872)
Sobolev Institute for Mathematics, 630090 Novosibirsk, Russia
* e-mail: achasov@math.nsc.ru
Published online: 28 October 2016
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 X(3872) → D*0D̄0 + c.c. decay studying only one more decay, for example, the X(3872) → π+π−J/ψ(1S) decay, and show that our spectra are effective means of selection of models for the resonance X(3872).
Then we discuss the scenario where the X(3872) resonance is the cc̄ = χc1(2P) charmonium which “sits on” the D*0D̄0 threshold.
We explain the shift of the mass of the X(3872) resonance with respect to the prediction of a potential model for the mass of the χc1(2P) charmonium by the contribution of the virtual D*D̄ + c.c. intermediate states into the self energy of the X(3872) resonance. This allows us to estimate the coupling constant of the X(7872) resonance with the D*0D̄0 channel, the branching ratio of the X(3872) → D*0D̄0 + c.c. decay, and the branching ratio of the X(3872) decay into all non-D*0D̄0 + c.c. states. We predict a significant number of unknown decays of X(3872) via two gluons: X(3872) → gluon gluon → hadrons.
© The Authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
