Beauty-full tetraquarks

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Hidden-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 کامل

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 کامل

Hyperspherical harmonic formalism for tetraquarks

We present a generalization of the hyperspherical harmonic formalism to study systems made of quarks and antiquarks of the same flavor. This generalization is based on the symmetrization of the N−body wave function with respect to the symmetric group using the Barnea and Novoselsky algorithm. Our analysis shows that four-quark systems with non-exotic 2 quantum numbers may be bound independently...

متن کامل

A lattice study of light scalar tetraquarks

The observed mass pattern of scalar resonances below 1 GeV gives preference to the tetraquark assignment over the conventional q̄q assignment for these states. We present a search for tetraquarks with isospins 0, 1/2, 1 in lattice QCD, where the isospin channels 1/2 and 1 have not been studied before. We determine three energy levels in each isospin channel using the variational method. The scat...

متن کامل

Tetraquarks: Mesons with two b quarks

We look for the existence of stable (by strong interactions) tetraquarks, mesons containing two heavy antiquarks and two light quarks, specifically a |b̄b̄qq〉 state. This state is viewed as two |b̄q〉 particles bound by a potential due to the exchange of the four light pseudoscalar and vector mesons, namely the π, η, ρ and ω. Couplings of these particles are obtained by the use of heavy quark symme...

متن کامل

ذخیره 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: Physics Letters B

سال: 2019

ISSN: 0370-2693

DOI: 10.1016/j.physletb.2019.134930