非零温度下的共振 X(4630) 分析

IF 2.6 3区 物理与天体物理 Q2 PHYSICS, NUCLEAR
G. Bozkır
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引用次数: 0

摘要

我们通过非零温度下的热QCD和则方法,计算了在欧洲核子研究中心的LHCb实验中观测到的\(B^{+}\rightarrow J/\Psi \phi K^{+}\)过程中共振X(4630)的光谱参数。X(4630)的奇异矢量被指定为具有自旋奇偶性(J^{PC}=1^{-+})的二夸克-反夸克态([cs][\overline{cs}]\)。通过采用算子维度高达六阶的两点 QCD 和则方法(包括非微扰贡献),我们计算了 X(4630) 在 \(T\ne 0\) 时的质量和衰变常数。数值分析表明,X(4630)在去抵消温度附近的质量和衰变常数值会下降到它们真空值的(9.8%)和(60%)。在(T/rightarrow 0)时,质量(m_{X(4630)}=(4649/pm 40)的结果为)MeV 和衰变常数 ((lambda _{X(4630)}=(10.07\pm 0.8)/times 10^{-3}\)MeV,与大型强子对撞机b实验报告的结果和其他理论预测非常一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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

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

We calculate the spectroscopic parameters of resonance X(4630) observed in the process \(B^{+}\rightarrow J/\Psi \phi K^{+}\) 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 \([cs][\overline{cs}]\) 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 \(T\ne 0\). 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 \(T\rightarrow 0\), the obtained results for the mass \(m_{X(4630)}=(4649\pm 40)\) MeV and decay constant \(\lambda _{X(4630)}=(10.07\pm 0.8)\times 10^{-3} \) MeV are in excellent agreement with the results reported by LHCb experiments and other theoretical predictions.

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来源期刊
The European Physical Journal A
The European Physical Journal A 物理-物理:核物理
CiteScore
5.00
自引率
18.50%
发文量
216
审稿时长
3-8 weeks
期刊介绍: Hadron Physics Hadron Structure Hadron Spectroscopy Hadronic and Electroweak Interactions of Hadrons Nonperturbative Approaches to QCD Phenomenological Approaches to Hadron Physics Nuclear and Quark Matter Heavy-Ion Collisions Phase Diagram of the Strong Interaction Hard Probes Quark-Gluon Plasma and Hadronic Matter Relativistic Transport and Hydrodynamics Compact Stars Nuclear Physics Nuclear Structure and Reactions Few-Body Systems Radioactive Beams Electroweak Interactions Nuclear Astrophysics Article Categories Letters (Open Access) Regular Articles New Tools and Techniques Reviews.
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