scholarly journals HEAVY BARYONS IN THE QUARK-DIQUARK PICTURE

1998 ◽  
Vol 13 (07) ◽  
pp. 1091-1113 ◽  
Author(s):  
DIETMAR EBERT ◽  
THORSTEN FELDMANN ◽  
CHRISTIANE KETTNER ◽  
HUGO REINHARDT
Keyword(s):  
Heavy Quark ◽  
Faddeev Equation ◽  
Bound States ◽  
Heavy Baryon ◽  
Heavy Quarks ◽  
Mass Limit ◽  
Static Approximation ◽  
Heavy Baryons

We describe heavy baryons as bound states of a quark and a diquark. For this purpose we derive the Faddeev equation for baryons containing a single heavy quark from a Nambu–Jona–Lasinio type of model which is appropriately extended to include also heavy quarks. The latter are treated in the heavy mass limit. The heavy baryon Faddeev equation is then solved using a static approximation for the exchanged quark.

Spectroscopy of heavy quark hadrons

2014 ◽  
Vol 23 (07) ◽  
pp. 1461007
Author(s):  
Makoto Oka
Keyword(s):  
Heavy Quark ◽  
Bound States ◽  
Heavy Quarks ◽  
P Wave ◽  
Charmed Baryon ◽  
Hadron Spectroscopy ◽  
Distinct Features

Heavy quarks play special roles in the hadron spectroscopy. Some distinct features of heavy quark dynamics and their significance in the P-wave baryons with a single heavy quark are discussed. We also explore a new color configuration in exotic tetra-quark mesons with two heavy quarks. Finally, possibility of bound states of a charmed baryon with a nucleon and nuclei are examined.

scholarly journals SYMMETRIES AND SYSTEMATICS OF DOUBLY HEAVY HADRONS

2012 ◽  
Vol 27 (08) ◽  
pp. 1250039 ◽  
Author(s):  
B. EAKINS ◽  
W. ROBERTS
Keyword(s):  
Experimental Data ◽  
Excitation Energy ◽  
Heavy Quark ◽  
Quark Model ◽  
Strange Quark ◽  
Heavy Meson ◽  
Heavy Quarks ◽  
Heavy Mesons ◽  
Heavy Baryons

We discuss the extension of the superflavor symmetry of doubly heavy baryons to states which contain an excited heavy diquark and we examine some of the consequences of this symmetry for the spectra of doubly heavy baryons and heavy mesons. We explore the ramifications of a proposed symmetry that relates heavy diquarks to doubly heavy mesons. We present a method for determining how the excitation energy of a system containing two heavy quarks will scale as one changes the strength of the interactions and the reduced mass of the system. We use this to derive consequences of the heavy diquark-doubly heavy meson symmetry. We compare these consequences to the results of a quark model as well as the experimental data for doubly and singly heavy mesons. We also discuss the possibility of treating the strange quark as a heavy quark and apply the ideas developed here to strange hadrons.

scholarly journals Improved pion mean fields and masses of singly heavy baryons

2020 ◽  
Vol 2020 (4) ◽  
Author(s):  
June-Young Kim ◽  
Hyun-Chul Kim
Keyword(s):  
Heavy Quark ◽  
Mass Spectra ◽  
Valence Quark ◽  
Mean Field ◽  
Heavy Baryon ◽  
The Other ◽  
Field Approach ◽  
Heavy Baryons ◽  
Mean Fields ◽  
Color Source

Abstract A singly heavy baryon can be viewed as $N_c-1$ ($N_c$ being the number of colors) light valence quarks bound by the pion mean fields that are created by the presence of the $N_c-1$ valence quarks self-consistently, while the heavy quark inside a singly heavy baryon is regarded as a static color source. We investigate how the pion mean fields are created by the presence of $N_c$, $N_c-1$, and $N_c-2$ light valence quarks, which correspond to the systems of light baryons, singly heavy baryons, and doubly heavy baryons. As the number of colors decreases from $N_c$ to $N_c-1$, the pion mean fields undergo changes. As a result, the valence quark contributions to the moments of inertia of the soliton become larger than for $N_c$ valence quarks, whereas the sea quark contributions decrease systematically. On the other hand, the presence of the $N_c-2$ valence quarks is not enough to produce the strong pion mean fields, which leads to the classical soliton not being formed. This indicates that the pion mean-field approach is not suitable to describe doubly heavy baryons. We show that the mass spectra of the singly heavy baryons are better described by the improved pion mean fields, compared with the previous work in which the pion mean fields are assumed to be intact with $N_c$ varied.

scholarly journals Strange and heavy hadrons production from coalescence plus fragmentation in AA collisions at RHIC and LHC

2018 ◽  
Vol 171 ◽  
pp. 13005
Author(s):  
Salvatore Plumari ◽  
Vincenzo Minissale ◽  
Santosh K. Das ◽  
Francesco Scardina ◽  
Vincenzo Greco
Keyword(s):  
Heavy Quark ◽  
Quark Mass ◽  
Heavy Baryon ◽  
Heavy Quarks ◽  
Heavy Quark Mass ◽  
Heavy Hadron ◽  
Light Baryon ◽  
The One ◽  
Aa Collisions

In a coalescence plus fragmentation approach we study the pT spectra of charmed hadrons D0, Ds up to about 10 GeV and the Λ+c /D0 ratio from RHIC to LHC energies. In this study we have included the contribution from decays of heavy hadron resonances and also that due to fragmentation of heavy quarks that are left in the system after coalescence. The pT dependence of the heavy baryon/meson ratios is found to be sensitive to the heavy quark mass. In particular we found that the Λc/D0 is much flatter than the one for light baryon/meson ratio like p/π and Λ/K.

scholarly journals Heavy quark spin multiplet structure of Pc-like pentaquarks as a P-wave hadronic molecular state

2019 ◽  
Vol 2019 (12) ◽  
Author(s):  
Yuki Shimizu ◽  
Yasuhiro Yamaguchi ◽  
Masayasu Harada
Keyword(s):  
Heavy Quark ◽  
Bound States ◽  
Heavy Baryon ◽  
Bound State ◽  
Molecular State ◽  
Heavy Meson ◽  
P Wave ◽  
Exchange Potential ◽  
Multiplet Structure ◽  
Quark Spin

Abstract We study the heavy quark spin (HQS) multiplet structure of P-wave $Q\bar{Q}qqq$-type pentaquarks treated as molecules of a heavy meson and a heavy baryon. We define the light-cloud spin (LCS) basis decomposing the meson–baryon spin wave function into LCS and HQS parts. Introducing the LCS basis, we find HQS multiplets classified by the LCS: five HQS singlets, two HQS doublets, and three HQS triplets. We construct the one-pion exchange potential respecting the heavy quark spin and chiral symmetries to demonstrate which HQS multiplets are realized as a bound state. By solving the coupled channel Schrödinger equations, we study the heavy meson–baryon systems with $I=1/2$ and $J^P=(1/2^+, 3/2^+, 5/2^+, 7/2^+)$. The bound states which have the same LCS structure are degenerate at the heavy quark limit, and the degeneracy is resolved for finite mass. This HQS multiplet structure will be measured in future experiments.

scholarly journals HEAVY BARYONS IN A QUARK MODEL

2008 ◽  
Vol 23 (19) ◽  
pp. 2817-2860 ◽  
Author(s):  
W. ROBERTS ◽  
MUSLEMA PERVIN
Keyword(s):  
Heavy Quark ◽  
Quark Model ◽  
Model Prediction ◽  
Spin Symmetry ◽  
Heavy Quarks ◽  
Charmed Baryon ◽  
Heavy Baryons ◽  
Quark Spin ◽  
Heavy Quark Spin Symmetry

A quark model is applied to the spectrum of baryons containing heavy quarks. The model gives masses for the known heavy baryons that are in agreement with experiment, but for the doubly-charmed baryon Ξcc, the model prediction is too heavy. Mixing between the ΞQ and Ξ′Q states is examined and is found to be small for the lowest lying states. In contrast with this, mixing between the Ξbc and Ξ′bc states is found to be large, and the implication of this mixing for properties of these states is briefly discussed. We also examine heavy-quark spin-symmetry multiplets, and find that many states in the model can be placed in such multiplets. We compare our predictions with those of a number of other authors.

scholarly journals Heavy baryons with strangeness in soliton models

2015 ◽  
Vol 39 ◽  
pp. 1560088
Author(s):  
H. Weigel ◽  
J. P. Blanckenberg
Keyword(s):  
Symmetry Breaking ◽  
Heavy Quark ◽  
Chiral Symmetry ◽  
Degrees Of Freedom ◽  
Heavy Quarks ◽  
Flavor Symmetry ◽  
Model Calculations ◽  
Soliton Model ◽  
Heavy Baryons

We present some recent results from soliton model calculations for the spectrum of baryons with a single heavy quark. The model comprises chiral symmetry for light flavors and (approximate) heavy spin–flavor symmetry for the heavy quarks. We focus on flavor symmetry breaking for strangeness degrees of freedom.

scholarly journals Non-Relativistic Model for the Semileptonic Λb→Λc Decay

1997 ◽  
Vol 12 (03) ◽  
pp. 195-204 ◽  
Author(s):  
Debrupa Chakraverty ◽  
Triptesh De ◽  
Binayak Dutta-Roy ◽  
K. S. Gupta
Keyword(s):  
Heavy Quark ◽  
Decay Width ◽  
Branching Ratio ◽  
Relativistic Model ◽  
Heavy Quark Symmetry ◽  
Heavy Baryons

We calculate the decay width for [Formula: see text] in the framework of a non-relativistic quark (NRQ) model of heavy baryons where the light quarks play the role of spectators. Our calculation does not make an explicit use of the heavy quark symmetry. The branching ratio for the above process as calculated here agrees reasonably well with the experimental value.

B-S EQUATION ANALYSIS OF HEAVY BARYON DECAYS

1996 ◽  
Vol 11 (18) ◽  
pp. 1523-1528 ◽  
Author(s):  
X.-H. GUO ◽  
T. MUTA
Keyword(s):  
Heavy Quark ◽  
Heavy Baryon ◽  
Equation Analysis ◽  
Heavy Quark Limit

As heavy baryon ΛQ (Q=b or c) consists of a heavy quark and a scalar light diquark, we establish the Bethe-Salpeter (B-S) equation for ΛQ in the heavy quark limit. With the reasonable kernel we solve the B-S equation numerically and calculate the Isgur-Wise function as Λb→Λc.

Probing QCD with heavy quark bound states

1983 ◽  
Vol 130 (3-4) ◽  
pp. 209-214 ◽  
Author(s):  
Kaoru Hagiwara ◽  
Steve Jacobs ◽  
M.G. Olsson ◽  
K.J. Miller
Keyword(s):  
Heavy Quark ◽  
Bound States
Sign in / Sign up

Export Citation Format

Share Document