Analysis of the resonance X(4630) at non-zero temperature

We calculate the spectroscopic parameters of resonance X (4630) observed in the process B + → J / Ψ ϕ K + by at the LHCb experiments at CERN by means of thermal QCD sum rule method at non-zero temperature. The exotic vector X (4630) is assigned as the diquark–antidiquark state [ c s ] [ cs ¯ ] with spin-parity J PC = 1 - + . Employing the two-point QCD sum rule approach up to the sixth order of the operator dimension by including non-perturbative contribution, we calculate the mass and decay constant of X (4630) at T ≠ 0 . The numerical analyses demonstrate that the values of the mass and decay constant of X (4630) near the deconfinement temperature decrease up to 9.8 % and 60 % of their vacuum values. At T → 0 , the obtained results for the mass m X ( 4630 ) = ( 4649 ± 40 ) MeV and decay constant λ X ( 4630 ) = ( 10.07 ± 0.8 ) × 10 - 3 MeV are in excellent agreement with the results reported by LHCb experiments and other theoretical predictions.