We present improved estimates of the couplings, masses and mass ratios of the Z_Q,X_Q and T_{QQqq} states using QCD Laplace sum rules (LSR), their ratios R and double ratios DRSR within stability criteria, where the NLO factorized PT QCD corrections are included which is important for giving a meaning on the running MS heavy quark mass used in the analysis. We show that combined R and DRSR can provide more precise results. First, we conclude that the observed X_c(3872) and Z_c(3900) are tetramoles states (superposition of quasi-degenerated molecule and a tetraquark states having (almost) the same coupling to the currents) with the predicted masses: M_{T_{X_c}}=3876(44) MeV and M_{ T_{Z_c}}=3900(42) MeV. In the 2nd part, we focus on the analysis of the four-quark nature of different T_{QQqq'} 1^+ and 0^+ states within the 3_c3_c interpolating currents. The final results are summarized in Table 7. Combined R and DRSR calibrated to the observed X_c(3872) lead to a precise prediction of e.g. M_{T_{cc}^{1^+}}=3886(6) MeV. In a similar way, the DRSR for M_{T_{cc}^{0^+}}/M_{T_{cc}^{1^+}} calibrated to M_{T_{cc}^{1^+}} gives M_{T_{cc}^{0^+}}= 3883(3) MeV. The SU3 breaking ratios M_{T_{ccss}^{0^+}}/ M_{T_{cc}^{0^+}} lead to the improved mass predictions: M_{T_{ccss}^{0^+}}=3988(12) MeV. In the 3rd part, the analysis is extended to the beauty mesons, where we find the tetramole masses : M_{ T_{Z_b}}=10579(99) MeV and M_{X_b}=10545(131) MeV. We also observe that the T^{1^+,0^+}_{bbqq'} states are (almost) stable (within the errors) against strong interactions. In the 4th part, we (critically) review and correct some recent LSR estimates of the T^{1^+,0^+}_{QQqq'} masses. Our results from LSR+DRSR are confronted with the ones from some other approaches (lattices and quark models) in Fig. 25.
$2^{++}$ Light Tensor Hybrid Meson from QCD Laplace Sum Rules
Dordt University(多德大学);Thompson Rivers University(汤普森河大学);Johannes Gutenberg-Universität Mainz(美因茨约翰内斯·古腾堡大学);Laboratoire Univers et Particules de Montpellier, CNRS-IN2P3(蒙彼利埃宇宙与粒子实验室,法国国家科学研究中心/欧洲核子研究组织联合);University of Saskatchewan(萨斯喀彻温大学)
New Dynamics (?) of $J/ψJ/ψ$ and $ΥΥ$ families from QCD Laplace sum rules at NLO
Laboratoire Univers et Particules de Montpellier, CNRS-IN2P3(蒙彼利埃宇宙与粒子实验室,法国国家科学研究中心-法国国家核物理与粒子物理研究所);Institute of High-Energy Physics (iHEPMAD), Univ. Antananarivo(马达加斯加大学高能物理研究所)
Revising the Mass of Light Hybrid Mesons: NLO QCD Sum Rules Point to $ϕ(2170)$ as a Prime Candidate
Zhejiang Institute of Modern Physics, School of Physics, Zhejiang University(浙江大学物理学院现代物理研究所);Department of Physics, College of Physics, Mechanical and Electrical Engineering, Jishou University(吉首大学物理科学与机电工程学院物理系);School of Physics, Sun Yat-Sen University(中山大学物理学院);Southern Center for Nuclear-Science Theory (SCNT), Institute of Modern Physics, Chinese Academy of Sciences(中国科学院近代物理研究所南方核科学理论中心)
XYZ-SU3 Breakings from Laplace Sum Rules at Higher Orders
We present new compact integrated expressions of SU3 breaking corrections to QCD spectral functions of heavy-light molecules and four-quark XYZ-like states at lowest order (LO) of perturbative (PT) QCD and up to d=8 condensates of the OPE. Including N2LO PT corrections in the chiral limit and NLO SU3 PT corrections, which we have estimated by assuming the factorization of the four-quark spectral functions, we improve previous LO results for the XYZ-like masses and decay constants from QCD spectral sum rules. Systematic errors are estimated from a geometric growth of the higher order PT correct…
Bottom-Charm $[bc]$ Diquark Masses from QCD Laplace Sum-Rules
National Yang Ming Chiao Tung University(国立阳明交通大学);University of Saskatchewan(萨斯喀彻温大学);Dordt University(多尔特大学);Thompson Rivers University(汤普森河大学);Johannes Gutenberg-Universität Mainz(美因茨约翰内斯·古腾堡大学);University of the Fraser Valley(弗雷泽河谷大学)
Bounds on hadronic contributions to the anomalous magnetic moment of the $τ$ lepton from QCD Sum Rules
Johannes Gutenberg-Universität Mainz(美因茨约翰内斯·古腾堡大学);Dordt University(多德大学);Thompson Rivers University(汤普森河大学);University of Saskatchewan(萨斯喀彻温大学);Indiana University(印第安纳大学)