Masses of doubly heavy tetraquarks QQq̄n̄ with JP = 1+
نویسندگان
چکیده
In this paper, we apply the method of QCD sum rules to study doubly heavy tetraquark states [Formula: see text] with spin-parity and strangeness using careful estimates Borel threshold parameters involved. Masses bottom charmed tetraquarks isospin are computed precisely via taking into account multifarious condensates up dimension 10. Compared two-heavy meson thresholds, find that all nonstrange doubly-bottom a doubly-charmed associated stable against strong decay two mesons while current is unstable decay. By way, weak widths also given.
منابع مشابه
Semileptonic decays of heavy tetraquarks.
There exist heavy tetraquark states QQq̄q̄ in the heavy quark limit. These states are stable with respect to strong interactions and hence must decay weakly. It is shown that the semileptonic decay depends on a single Isgur– Wise form factor, which can be expressed in term of the Isgur–Wise form factors which govern the semileptonic decays of the Qqq and QQq baryons. Typeset using REVTEX 1 The po...
متن کاملHow to Search for Doubly Charmed Baryons and Tetraquarks
Possible experimental searches of doubly charmed baryons and tetraquarks at fixed target experiments with high energy hadron beams and a high intensity spectrometer are considered here. The baryons considered are: Ξ+cc (ccd), Ξ cc (ccu), and Ω + cc (ccs); and the tetraquark is T (ccūd̄). Estimates are given of masses, lifetimes, internal structure, production cross sections, decay modes, branchi...
متن کاملMasses and semileptonic decays of doubly heavy baryons in a nonrelativistic quark model
We evaluate masses and semileptonic decay widths for the ground state of doubly heavy Ξ and Ω baryons in the framework of a nonrelativistic quark model. We solve the three-body problem by means of a variational ansatz made possible by heavy-quark spin symmetry constraints. Our masses are comparable to the ones obtained in relativistic calculations and we get one of the best agreements with latt...
متن کاملMasses of Heavy Hadrons
An estimate has been made of the masses of heavy hadrons in nonrelativistic quark model, which includes spin and flavor-dependent hyperfine splitting for two quarks. The effect of variation of the wavefunction value at origin i.e. |ψ(0)| and the strong coupling constant αs, with flavor, has also been included in calculating the mass values.
متن کاملHidden-Beauty Charged Tetraquarks and Heavy Quark Spin Conservation
Assuming the dominance of the spin-spin interaction in a diquark, we point out that the mass difference in the beauty sector M(Z ′ b ) −M(Zb) scales with quark masses as expected in QCD, with respect to the corresponding mass difference M(Z ′ c ) −M(Zc). Notably, we show that the decays Υ(10890) → Υ(nS)ππ and Υ(10890) → (hb(1P ), hb(2P ))ππ are compatible with heavy-quark spin conservation if t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Modern Physics Letters A
سال: 2022
ISSN: ['1793-6632', '0217-7323']
DOI: https://doi.org/10.1142/s0217732322502236