Hadronic molecules in the heavy baryon spectrum

2016 ◽  
Author(s):  
D. R. Entem ◽  
P. G. Ortega ◽  
F. Fernández
Keyword(s):  
Heavy Baryon ◽  
Baryon Spectrum

scholarly journals Heavy baryon spectrum with chiral multiplets of scalar and vector diquarks

2021 ◽  
Vol 104 (5) ◽  
Author(s):  
Yonghee Kim ◽  
Yan-Rui Liu ◽  
Makoto Oka ◽  
Kei Suzuki
Keyword(s):  
Heavy Baryon ◽  
Baryon Spectrum

scholarly journals Excited heavy baryon spectrum in largeNcheavy quark effective theory

1998 ◽  
Vol 59 (3) ◽  
Author(s):  
Jong-Phil Lee ◽  
Chun Liu ◽  
H. S. Song
Keyword(s):  
Heavy Baryon ◽  
Effective Theory ◽  
Baryon Spectrum

scholarly journals Lattice Evidence for Bound Heavy Tetraquarks

2019 ◽  
Vol 202 ◽  
pp. 06013
Author(s):  
Anthony Francis ◽  
Renwick J. Hudspith ◽  
Randy Lewis ◽  
Kim Maltman
Keyword(s):  
Quark Mass ◽  
Bound States ◽  
Heavy Baryon ◽  
Binding Energies ◽  
Mass Dependence ◽  
Physical Point ◽  
Charm Quarks ◽  
Baryon Spectrum ◽  
Heavy Quark Mass ◽  
Exotic Hadrons

We investigate the possibility of qq'$ \bar {Q}\bar {Q}' $ tetraquark bound states using nf = 2 + 1 lattice QCD with pion masses ≃ 164, 299 and 415 MeV. Two types of lattice interpolating operator are chosen, reflecting first diquarkantidiquark and second meson-meson structure. Performing variational analysis using these operators and their mixings, we determine the ground and first excited states from the lattice correlators. Using non-relativistic QCD to simulate the bottom quarks and the Tsukuba formulation of relativistic heavy quarks for charm quarks, we study the ud$ \bar {b}\bar {b} $, ℓs$ \bar {b}\bar {b} $ as well as ud$ \bar {c}\bar {b} $, channels with ℓ= u, d. In the case of the ud$ \bar {b}\bar {b} $ and ℓs$ \bar {b}\bar {b} $ channels unambiguous signals for JP=1+ tetraquarks are found with binding energies 189(10) and 98(7) MeV below the corresponding free two-meson thresholds at the physical point. These tetraquarks are therefore strong-interaction stable, implying they are stable under strong as well as electromagnetic interactions while they can decay weakly. So far these are the first exotic hadrons predicted to have this feature. Further evidence for binding is found in the ud$ \bar {c}\bar {b} $ channel, whereby the binding energy broadly straddles the electromagnetic stability threshold. Studying further the quark mass dependence we vary the heavy quark mass in ud$ \bar {Q}\bar {Q} $, ℓs$ \bar {Q}\bar {Q} $ as well as ud$ \bar {Q}\bar {b} $, ℓs$ \bar {Q}\bar {b} $ between roughly 0.7 and 6.3 times the bottom quark mass. The observed mass dependence of these four flavor channels closely follows a behaviour argued from phenomenological considerations of the heavy baryon spectrum.

POSSIBLE MOLECULAR STRUCTURES IN THE HEAVY BARYON SPECTRUM

2014 ◽  
Vol 26 ◽  
pp. 1460123
Author(s):  
D. R. ENTEM ◽  
P. G. ORTEGA ◽  
F. FERNÁNDEZ
Keyword(s):  
Experimental Data ◽  
Bound States ◽  
Constituent Quark ◽  
Heavy Baryon ◽  
Bound State ◽  
Constituent Quark Model ◽  
Molecular Structures ◽  
Baryon Spectrum ◽  
Small Binding Energy ◽  
Bottom Baryon

We use a chiral constituent quark model to study possible molecular structures in the heavy baryon spectrum. We first analyze D*N states and we find a bound state in the JP = 3/2- sector with an small binding energy. This state can be identified with the Λc(2940)+. The decays of this state are compatible with the existent experimental data. As a by product a state is predicted in the bottom baryon spectrum as a [Formula: see text] state with a mass around 6250 MeV. Moreover we also analyze other DN, D*N, DΔ and D*Δ states and their analogs in the bottom baryon sector finding several bound states.

scholarly journals Doubly heavy baryons in Born-Oppenheimer EFT

2022 ◽  
Vol 258 ◽  
pp. 04003
Author(s):  
Jaume Tarrús Castellà
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Heavy Baryon ◽  
Effective Field ◽  
Fermion Field ◽  
Long Distance ◽  
Baryon Spectrum ◽  
Heavy Quark Mass ◽  
Heavy Baryons ◽  
The One

We report on the recent progress on the computation of the doubly heavy baryon spectrum in effective field theory. The effective field theory is built upon the heavy-quark mass and adiabatic expansions. The potentials can be expressed as NRQCD Wilson loops with operator insertions. These are nonperturbative objects and so far only the one corresponding to the static potential has been computed with lattice QCD. We review the proposal for a parametrization of the potentials based in an interpolation between the shortand long-distance regimes. The long-distance description is obtained with a newly proposed Effective String Theory which coincides with the previous ones for pure gluodynamics but it is extended to contain a fermion field. We show the doubly heavy baryon spectrum with hyperfine contributions obtained using these parametrizations for the hyperfine potentials.

scholarly journals HEAVY MESON RADIATIVE DECAYS AND LIGHT VECTOR MESON DOMINANCE

1995 ◽  
Vol 10 (17) ◽  
pp. 2467-2478 ◽  
Author(s):  
PANKAJ JAIN ◽  
ARSHAD MOMEN ◽  
JOSEPH SCHECHTER
Keyword(s):  
Vector Meson ◽  
Heavy Baryon ◽  
Bound State ◽  
Heavy Meson ◽  
Coupling Constants ◽  
Vector Meson Dominance ◽  
Baryon Spectrum ◽  
Light Vector ◽  
Pattern Application ◽  
Suitable Notion

Electromagnetic interactions are introduced in the effective chiral Lagrangian for heavy mesons which includes light vector particles. A suitable notion of vector meson dominance is formulated. The constraints on the heavy meson-light vector and heavy meson-light pseudoscalar coupling constants are obtained using experimental D*→Dγ branching ratios. These constraints are compared with values estimated from semileptonic transition amplitudes as well as from extension of the light meson coupling pattern. Application to the heavy baryon spectrum in the “bound state” model is made.

scholarly journals Study of Doubly Heavy Baryon Spectrum via QCD Sum Rules

2012 ◽  
Vol 57 (3) ◽  
pp. 435-444 ◽  
Author(s):  
Liang Tang ◽  
Xu-Hao Yuan ◽  
Cong-Feng Qiao ◽  
Xue-Qian Li
Keyword(s):  
Sum Rules ◽  
Heavy Baryon ◽  
Qcd Sum Rules ◽  
Baryon Spectrum

scholarly journals The axion-baryon coupling in SU(3) heavy baryon chiral perturbation theory

2021 ◽  
Vol 2021 (8) ◽  
Author(s):  
Thomas Vonk ◽  
Feng-Kun Guo ◽  
Ulf-G. Meißner
Keyword(s):  
Perturbation Theory ◽  
Chiral Perturbation Theory ◽  
Heavy Baryon ◽  
Power Counting ◽  
Flavor Symmetry ◽  
Chiral Perturbation ◽  
Third Order ◽  
Stellar Objects ◽  
The Past ◽  
Dense Nuclear Matter

Abstract In the past, the axion-nucleon coupling has been calculated in the framework of SU(2) heavy baryon chiral perturbation theory up to third order in the chiral power counting. Here, we extend these earlier studies to the case of heavy baryon chiral perturbation theory with SU(3) flavor symmetry and derive the axion coupling to the full SU(3) baryon octet, showing that the axion also significantly couples to hyperons. As studies on dense nuclear matter suggest the possible existence of hyperons in stellar objects such as neutron stars, our results should have phenomenological implications related to the so-called axion window.

scholarly journals Applications of AdS/CFT Duality to QCD

2006 ◽  
Vol 21 (04) ◽  
pp. 762-768 ◽  
Author(s):  
Stanley J. Brodsky ◽  
Guy F. de Téramond
Keyword(s):  
Scattering Amplitudes ◽  
Quantum Chromodynamics ◽  
Power Law ◽  
Mass Parameter ◽  
Light Quark ◽  
Form Factors ◽  
Light Front ◽  
Baryon Spectrum ◽  
Conformal Theory ◽  
Counting Rules

Even though quantum chromodynamics is a broken conformal theory, the AdS/CFT correspondence has led to important insights into the properties of QCD. For example, as shown by Polchinski and Strassler, dimensional counting rules for the power-law falloff of hadron scattering amplitudes follow from dual holographic models with conformal behavior at short distances and confinement at large distances. We find that one also obtains a remarkable representation of the entire light-quark meson and baryon spectrum, including all orbital excitations, based on only one mass parameter. We also show how hadron light-front wavefunctions and hadron form factors in both the space-like and time-like regions can be predicted.

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