Mass spectra and radiative transitions of doubly heavy baryons in a relativized quark model

The heavy diquark symmetry (HDS) of doubly heavy baryons (DHBs) provides new insights into the spectroscopy of these hadrons. We derive the consequences of this symmetry for the mass spectra and the decay widths of DHBs. We compare these symmetry constraints to results from a nonrelativistic quark model for the mass spectra and results from the 3P0 model for strong decays. The quark model we implement was not constructed with these symmetries and contains interactions which explicitly break HDS. Nevertheless these symmetries emerge. We argue that the 3P0 model and any other model for strong transitions which employs a spectator assumption explicitly respects HDS. We also explore the possibility of treating the strange quark as a heavy quark and apply these ideas to Ξ, Ξc and Ξb baryons.

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Properties of Doubly Heavy Baryons

Universe ◽

10.3390/universe7090337 ◽

2021 ◽

Vol 7 (9) ◽

pp. 337

Author(s):

Zalak Shah ◽

Amee Kakadiya ◽

Keval Gandhi ◽

Ajay Kumar Rai

Keyword(s):

Excited State ◽

Quark Model ◽

Ground State ◽

Mass Spectra ◽

Constituent Quark ◽

Magnetic Moments ◽

Constituent Quark Model ◽

Negative Parity ◽

Heavy Baryons ◽

Model Scheme

We revisited the mass spectra of the Ξcc++ baryon with positive and negative parity states using Hypercentral Constituent Quark Model Scheme with Coloumb plus screened potential. The ground state of the baryon has been determined by the LHCb experiment, and the anticipated excited state masses of the baryon have been compared with several theoretical methodologies. The transition magnetic moments of all heavy baryons Ξcc++, Ξcc+, Ωcc+, Ξbb0, Ξbb−, Ωbb−, Ξbc+, Ξbc0, Ωbc0 are also calculated and their values are −1.013 μN, 1.048 μN, 0.961 μN, −1.69 μN, 0.73 μN, 0.48 μN, −1.39 μN, 0.94 μN and 0.710 μN, respectively.

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Ground-state triply and doubly heavy baryons in a relativistic three-quark model

Physics Letters B ◽

10.1016/j.physletb.2008.04.030 ◽

2008 ◽

Vol 663 (4) ◽

pp. 317-321 ◽

Cited By ~ 79

Author(s):

A.P. Martynenko

Keyword(s):

Quark Model ◽

Ground State ◽

Heavy Baryons

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Mass spectra of heavy baryons

10.22323/1.077.0103 ◽

2012 ◽

Author(s):

Vladimir Galkin ◽

Dietmar Ebert ◽

Rudolf Nikolaevich Faustov

Keyword(s):

Mass Spectra ◽

Heavy Baryons

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MOMENTUM-SPACE FADDEEV CALCULATIONS FOR GROUND-STATE TRIPLY AND DOUBLY HEAVY BARYONS IN THE CONSTITUENT QUARK MODEL

Modern Physics Letters A ◽

10.1142/s0217732310032962 ◽

2010 ◽

Vol 25 (24) ◽

pp. 2077-2088 ◽

Cited By ~ 3

Author(s):

W. ZHENG ◽

H. R. PANG

Keyword(s):

Quark Model ◽

Ground State ◽

Constituent Quark ◽

Relativistic Correction ◽

Constituent Quark Model ◽

Spin Splitting ◽

Decuplet Baryon ◽

Heavy Baryons ◽

Three Body ◽

S Quarks

In the framework of constituent quark model, mass spectra of the ground-state baryons consisting of three or two heavy (b or c) and one light (u, d or s) quarks are calculated by solving three-body Faddeev equations. The results imply that, it is possible to obtain a unified model to describe heavy baryons spectra, as well as meson and SU(3) octet and decuplet baryon spectra. We find that, when taking into account the relativistic correction quark–diquark approximation and three-body Faddeev approach tend to give similar predictions for heavy–light systems. We also study the spin splitting of JP = (1/2+) and JP = (3/2+).

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Masses of fully heavy tetraquarks $$QQ {\bar{Q}} {\bar{Q}}$$ in an extended relativized quark model

The European Physical Journal C ◽

10.1140/epjc/s10052-020-08454-1 ◽

2020 ◽

Vol 80 (9) ◽

Cited By ~ 7

Author(s):

Qi-Fang Lü ◽

Dian-Yong Chen ◽

Yu-Bing Dong

Keyword(s):

Quark Model ◽

Mass Spectra ◽

Ground States ◽

Lhcb Collaboration ◽

Wave Functions ◽

Recent Measurement ◽

Heavy Quarkonium ◽

Radial Excitation ◽

Broad Structure ◽

Narrow Structure

AbstractInspired by recent measurement of possible fully charmed tetraquarks in LHCb Collaboration, we investigate the mass spectra of fully heavy tetraquarks $$QQ {\bar{Q}} {\bar{Q}}$$ Q Q Q ¯ Q ¯ in an extended relativized quark model. Our estimations indicate that the broad structure around 6.4 GeV should contain one or more ground states for $$cc {\bar{c}} {\bar{c}}$$ c c c ¯ c ¯ tetraquarks, while the narrow structure near 6.9 GeV can be categorized as the first radial excitation of $$cc {\bar{c}} {\bar{c}}$$ c c c ¯ c ¯ system. Moreover, with the wave functions of the tetraquarks and mesons, the strong decays of tetraquarks into heavy quarkonium pair are qualitatively discussed, which can be further checked by the LHCb and CMS Collaborations.

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