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Dear colleagues,

The organizers of the XXXII International Workshop on High Energy Physics "Hot problems of Strong Interactions” https://indico.ihep.su/event/563/overview and Universe are going to produce a Special Issue.

The XXXII International Workshop on High Energy Physics "Hot problems of Strong Interactions” was devoted to recent developments and long standing problems of phase diagrams of strongly-interacting matter as well as of the physics of heavy quarks. A large range of topics have been discussed such as new findings in heavy-quark spectroscopy, doubly heavy baryons, tetraquarks, pentaquarks, heavy quarkonia, quarkonia production in heavy-ion collisions, etc. The main topic, phase diagrams of strongly-interacting matter, included the discussion of the phase structure of QCD at high temperature and baryon density, and the influence upon them of various conditions such as chiral and isospin densities, strong magnetic fields and vorticity, etc. QCD phase diagrams in the context of astrophysics, heavy-ion collisions and the early universe have been overviewed.

The Guest Editors of the Special Issue are happy to invite you to submit your paper for publication in this Special Issue of Universe.

Prof. Dr. David Blaschke
Dr. Vitaly Bornyakov
Prof. Dr. Konstantin Klimenko
Dr. Alexey Luchinsky
Dr. Roman Rogalyov
Dr. Roman Zhokhov
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Universe is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

Confinement & chiral symmetry breaking in QCD
QCD at finite temperature and non-zero baryon density
QCD phase diagram
Lattice QCD
Functional continuum methods
Effective models approach
QCD phase diagram in astrophysics and in heavy-ion collisions
QCD phase structure with chiral and isospin imbalance

Published Papers (2 papers)

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Research

Jump to: Review

11 pages, 312 KiB

Open AccessArticle

Properties of Doubly Heavy Baryons

by Zalak Shah, Amee Kakadiya, Keval Gandhi and Ajay Kumar Rai

Universe 2021, 7(9), 337; https://doi.org/10.3390/universe7090337 - 09 Sep 2021

Cited by 11 | Viewed by 1568

Abstract

We revisited the mass spectra of the

Ξ_{c c}^{+ +}

We revisited the mass spectra of the

Ξ_{c c}^{+ +}

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

Ξ_{c c}^{+ +}

Ξ_{c c}^{+}

Ω_{c c}^{+}

Ξ_{b b}^{0}

Ξ_{b b}^{-}

Ω_{b b}^{-}

Ξ_{b c}^{+}

Ξ_{b c}^{0}

Ω_{b c}^{0}

are also calculated and their values are −1.013

μ_{N}

, 1.048

μ_{N}

, 0.961

μ_{N}

, −1.69

μ_{N}

, 0.73

μ_{N}

, 0.48

μ_{N}

, −1.39

μ_{N}

, 0.94

μ_{N}

and 0.710

μ_{N}

, respectively. Full article

(This article belongs to the Special Issue Phase Diagram of Strongly-Interacting Matter and Physics of Heavy Quarks)

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Figure 1

Review

Jump to: Research

21 pages, 383 KiB

Open AccessReview

Heavy Tetraquarks in the Relativistic Quark Model

by Rudolf N. Faustov, Vladimir O. Galkin and Elena M. Savchenko

Universe 2021, 7(4), 94; https://doi.org/10.3390/universe7040094 - 08 Apr 2021

Cited by 64 | Viewed by 2117

Abstract

We give a review of the calculations of the masses of tetraquarks with two and four heavy quarks in the framework of the relativistic quark model based on the quasipotential approach and QCD. The diquark-antidiquark picture of heavy tetraquarks is used. The quasipotentials of the quark-quark and diquark-antidiquark interactions are constructed similarly to the previous consideration of mesons and baryons. Diquarks are considered in the colour triplet state. It is assumed that the diquark and antidiquark interact in the tetraquark as a whole and the internal structure of the diquarks is taken into account by the calculated form factor of the diquark-gluon interaction. All parameters of the model are kept fixed from our previous calculations of meson and baryon properties. A detailed comparison of the obtained predictions for heavy tetraquark masses with available experimental data is given. Many candidates for tetraquarks are found. It is argued that the structures in the di-

J / ψ

mass spectrum observed recently by the LHCb collaboration can be interpreted as

c c \bar{c} \bar{c}

tetraquarks. Full article

(This article belongs to the Special Issue Phase Diagram of Strongly-Interacting Matter and Physics of Heavy Quarks)

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Published Papers (2 papers)

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