Author:
Chen 陈 Chang 畅,Meng 孟 Ce 策,Xiao 肖 Zhiguang 志广,Zheng 郑 Han-Qing 汉青
Abstract
Abstract
Recently, the LHCb experimental group found an exotic state
from the
process. A key question is whether it is just a molecule or may have a confined tetraquark ingredient. To investigate this, different methods were used, including a two-channel (
and
) K-matrix unitarization and a single-channel Flatté-like parametrization method analyzed utilizing the pole counting rule and spectral density function sum rule. These analyses demonstrated that
is a molecular state, although the possibility that there may exist an elementary ingredient cannot be excluded, according to an approximate analysis of its production rate.
Funder
National Natural Science Foundation of China
the Fundamental Research Funds for the Central Universities
Cited by
3 articles.
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