摘要：
In this paper, we study the gravitational waves of holographic QCD phase transition with hyperscaling violation. We consider an Einstein-Maxwell Dilaton background and discuss the confinement-deconfinement phase transition between thermally charged AdS and AdS black holes. We find that hyperscaling violation reduces the phase transition temperature. In a further study, we discuss the effect of hyperscaling violation on the GW spectrum. We found that the hyperscaling violation exponent suppresses the peak frequency of the total GW spectrum. Moreover, the results of the GW spectrum may be detected by IPTA, SKA, BBO, and NANOGrav. We also find that the hyperscaling violation exponent suppresses the peak frequency of the bubble-collision spectrum h2 Omega env. Hyperscaling violation enhances the energy densities of the sound wave spectrum h2 Omega sw and the MHD turbulence spectrum h2 Omega turb. The total GW spectrum is dominated by the contribution of the bubble collision in runaway bubbles case.
作者机构：
[Chang, Wen-Bin] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;Cent China Normal Univ, Key Lab Quark & Lepton Phys MOS, Wuhan, Peoples R China.
通讯机构：
[Chang, WB ] C;Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
摘要：
In this study, we utilize the complexity-action duality to study the evolution of complexity in a holographic QCD model at finite temperature and chemical potential. By inserting a fundamental string as a probe, we investigated the properties of complexity growth in this Einstein-Maxwell-scalar gravity system, which is affected by the string velocity, chemical potential, and temperature. Our results show that the complexity growth is maximized when the probe string is stationary, and it decreases as the velocity of the string increases. When the string approaches relativistic velocities, the complexity growth always increases monotonically with respect to the chemical potential. Furthermore, we find that the complexity growth can be used to identify phase transitions and crossovers in the model.
期刊：
EUROPEAN PHYSICAL JOURNAL PLUS,2024年139(3):1-7 ISSN：2190-5444
通讯作者：
Zhang, ZQ
作者机构：
[Zhang, Zi-qiang; Zhang, ZQ] China Univ Geosci, Sch Math & Phys, Wuhan 430074, Peoples R China.;[Hou, De-fu] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, ZQ ] C;China Univ Geosci, Sch Math & Phys, Wuhan 430074, Peoples R China.
摘要：
Using the AdS/CFT correspondence, we study finite 't Hooft coupling corrections on the instantaneous energy loss of light quarks within shooting string. We consider the first higher-derivative corrections to the supergravity theory, which are R4\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$R<^>4$$\end{document} terms in the gravity action. It turns out that the energy loss decreases with decreasing lambda\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\lambda$$\end{document} ('t Hooft coupling constant), in agreement with previous findings of the light quarks energy loss obtained from the jet quenching parameter and stopping distance. In addition, we discuss how the energy loss changes with the shear viscosity to entropy density ratio at strong coupling.
期刊：
EUROPEAN PHYSICAL JOURNAL C,2024年84(3):1-13 ISSN：1434-6044
通讯作者：
Sheng, XL
作者机构：
[Hou, Defu; Sheng, Xin-Li; Yang, Shu-Yun; Zou, Yao-Lin; Sheng, XL] Cent China Normal Univ, Key Lab Quark & Lepton Phys, MOE, Wuhan 430079, Peoples R China.;[Hou, Defu; Sheng, Xin-Li; Yang, Shu-Yun; Zou, Yao-Lin; Sheng, XL] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Sheng, Xin-Li; Sheng, XL] INFN, Sez Firenze, Via G Sansone 1, I-50019 Florence, Italy.
通讯机构：
[Sheng, XL ] C;Cent China Normal Univ, Key Lab Quark & Lepton Phys, MOE, Wuhan 430079, Peoples R China.;Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;INFN, Sez Firenze, Via G Sansone 1, I-50019 Florence, Italy.
摘要：
<jats:title>Abstract</jats:title><jats:p>Based on the Nambu–Jona–Lasinio (NJL) model, we develop a framework for calculating the spin alignment of vector mesons and applied it to study <jats:inline-formula><jats:alternatives><jats:tex-math>$$\phi $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>ϕ</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula> mesons in a magnetic field. We calculate mass spectra for <jats:inline-formula><jats:alternatives><jats:tex-math>$$\phi $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>ϕ</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula> mesons and observe mass splitting between the longitudinally polarized state and transversely polarized states. The <jats:inline-formula><jats:alternatives><jats:tex-math>$$\phi $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>ϕ</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula> meson in a thermal equilibrium system is preferred to occupy the state with spin <jats:inline-formula><jats:alternatives><jats:tex-math>$$\lambda =0$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mrow>
<mml:mi>λ</mml:mi>
<mml:mo>=</mml:mo>
<mml:mn>0</mml:mn>
</mml:mrow>
</mml:math></jats:alternatives></jats:inline-formula> than those with spin <jats:inline-formula><jats:alternatives><jats:tex-math>$$\lambda =\pm 1$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mrow>
<mml:mi>λ</mml:mi>
<mml:mo>=</mml:mo>
<mml:mo>±</mml:mo>
<mml:mn>1</mml:mn>
</mml:mrow>
</mml:math></jats:alternatives></jats:inline-formula>, because the former state has a smaller energy. As a consequence, we conclude that the spin alignment will be larger than 1/3 if one measures along the direction of the magnetic field, which is qualitatively consistent with the recent STAR data. Around the critical temperature <jats:inline-formula><jats:alternatives><jats:tex-math>$$T_{C}=150~\hbox {MeV}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mrow>
<mml:msub>
<mml:mi>T</mml:mi>
<mml:mi>C</mml:mi>
</mml:msub>
<mml:mo>=</mml:mo>
<mml:mn>150</mml:mn>
<mml:mspace />
<mml:mtext>MeV</mml:mtext>
</mml:mrow>
</mml:math></jats:alternatives></jats:inline-formula>, the positive deviation from 1/3 is proportional to the square of the magnetic field strength, which agrees with the result from the non-relativistic coalescence model. Including the anomalous magnetic moments for quarks will modify the dynamical masses of quarks and thus affect the mass spectra and spin alignment of <jats:inline-formula><jats:alternatives><jats:tex-math>$$\phi $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>ϕ</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula> mesons. The discussion of spin alignment in the NJL model may help us better understand the formation of hadron’s spin structure during the chiral phase transition.</jats:p>
期刊：
Journal of High Energy Physics,2024年2024(3):1-29 ISSN：1029-8479
通讯作者：
Hou, De-Fu;Ren, HC
作者机构：
[Ren, Hai-Cang; Chen, Jun-Xia; Hou, De-Fu] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Ren, Hai-Cang; Chen, Jun-Xia; Hou, De-Fu] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOS, Wuhan 430079, Peoples R China.;[Ren, Hai-Cang] Rockefeller Univ, Phys Dept, 1230 York Ave, New York, NY 10021 USA.
通讯机构：
[Ren, HC ; Hou, DF] C;Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;Cent China Normal Univ, Key Lab Quark & Lepton Phys MOS, Wuhan 430079, Peoples R China.;Rockefeller Univ, Phys Dept, 1230 York Ave, New York, NY 10021 USA.
摘要：
We explored the gravity dual of a rotating quark-gluon plasma by transforming the boundary coordinates of the large black hole limit of Schwarchild-AdS5 metric. The Euler-Lagrange equation of the Nambu-Goto action and its solution become more complex than those without rotation. For small angular velocity, we obtained an analytical form of the drag force acting on a quark moving in the direction of the rotation axis and found it stronger than that without rotation. We also calculated the heavy quark potential under the same approximation. For the quarkonium symmetric with respect to the rotation axis, the depth of the potential is reduced by the rotation. For the quarkonium oriented in parallel to the rotation axis, the binding force is weakened and the force range becomes longer. We also compared our holographic formulation with others in the literature.
作者机构：
[Hou, Defu; Zhao, Yan-Qing] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Hou, Defu; Zhao, Yan-Qing] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOS, Wuhan 430079, Peoples R China.;[He, Song] Jilin Univ, Ctr Theoret Phys, Changchun 130012, Peoples R China.;[He, Song] Jilin Univ, Coll Phys, Changchun 130012, Peoples R China.;[He, Song] Max Planck Inst Grav Phys, Albert Einstein Inst, Muhlenberg 1, D-14476 Golm, Germany.
通讯机构：
[Zhao, YQ ] C;Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;Cent China Normal Univ, Key Lab Quark & Lepton Phys MOS, Wuhan 430079, Peoples R China.
摘要：
We explore the phase structure of quantum chromodynamics (QCD) with two dynamical quark flavors at finite temperature and baryon chemical potential, employing the nonperturbative gauge/gravity duality approach. Our gravitational model is tailored to align with state-of-the-art lattice data regarding the thermal properties of multiflavor QCD. Following a rigorous parameter calibration to match equations of state and the QCD trace anomaly at zero chemical potential derived from cutting-edge lattice QCD simulations, we investigate thermodynamic quantities and order parameters. We predict the location of the critical endpoint (CEP) at (mu CEP; TCEP) 1/4 (219; 182) MeV at which a line of first-order phase transitions terminate. We compute critical exponents associated with the CEP and find that they almost coincide with the critical exponents of the quantum 3D Ising model.
期刊：
EUROPEAN PHYSICAL JOURNAL C,2024年84(4):1-9 ISSN：1434-6044
通讯作者：
Hou, DF
作者机构：
[Hou, De-Fu; Chen, Jun-Xia] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Hou, De-Fu; Chen, Jun-Xia] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOS, Wuhan 430079, Peoples R China.
通讯机构：
[Hou, DF ] C;Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;Cent China Normal Univ, Key Lab Quark & Lepton Phys MOS, Wuhan 430079, Peoples R China.
摘要：
We obtain the dual gravity metric of rotating nuclear matter by performing a standard Lorentz transformation on the static metric in the D-instanton background. We then study the effects of the angular velocity, instanton density, and temperature on the heavy quark potential. The results show that the angular velocity and the temperature promote dissociation of the quark-antiquark pair, and the instanton density suppresses dissociation. Similarly, according to the results for the jet quenching parameter, we find that the parameter increases with the increase in angular velocity, instanton density, and temperature, and the jet quenching parameter in the rotating D-instanton background is larger than that of N = 4 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\mathcal {N} =4$$\end{document} supersymmetric Yang-Mills (SYM) theory.
作者机构：
[Yang, Shu-Yun; Ren, Hai-Cang; Hou, De-Fu] Cent China Normal Univ, Inst Particle Phys, Key Lab Quark & Lepton Phys MOS, Wuhan 430079, Peoples R China.;[Fang, Ren-Hong] Shandong Univ, Inst Frontier & Interdisciplinary Sci, Key Lab Particle Phys & Particle Irradiat MOE, Qingdao 266237, Peoples R China.;[Ren, Hai-Cang] Rockefeller Univ, Phys Dept, 1230 York Ave, New York, NY 10021 USA.
通讯机构：
[Hou, D.-F.; Ren, H.-C.] I;Institute of Particle Physics, China
关键词：
heavy ion collisions;quark-gluon plasmas;axial-chiral-vortical-effect
摘要：
We investigate the axial vortical effect in a uniformly rotating sphere subject to finite size. We use the MIT boundary condition to limit the boundary of the sphere. For massless fermions inside the sphere, we obtain the exact axial vector current far from the boundary that matches the expression obtained in cylindrical coordinates in literature. On the spherical boundary, we find both the longitudinal and transverse (with respect to the rotation axis) components with magnitude depending on the colatitude angle. For massive fermions, we derive an expansion of the axial conductivity far from the boundary to all orders of mass, whose leading order term agrees with the mass correction reported in literature. We also obtain the leading order mass correction on the boundary, which is linear and stronger than the quadratic dependence far from the boundary. The qualitative implications on the phenomenology of heavy ion collisions are speculated.
期刊：
EUROPEAN PHYSICAL JOURNAL C,2023年83(11):1-15 ISSN：1434-6044
通讯作者：
Hou, DF
作者机构：
[Hou, Defu; Hou, DF; Zhao, Yan-Qing] Cent China Normal Univ, Inst Particle Phys, Key Lab Quark & Lepton Phys MOS, Wuhan 430079, Peoples R China.
通讯机构：
[Hou, DF ] C;Cent China Normal Univ, Inst Particle Phys, Key Lab Quark & Lepton Phys MOS, Wuhan 430079, Peoples R China.
摘要：
<jats:title>Abstract</jats:title><jats:p>We study the dissociation effect of <jats:inline-formula><jats:alternatives><jats:tex-math>$$J/\Psi $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mrow>
<mml:mi>J</mml:mi>
<mml:mo>/</mml:mo>
<mml:mi>Ψ</mml:mi>
</mml:mrow>
</mml:math></jats:alternatives></jats:inline-formula> in magnetized, rotating QGP matter at finite temperature and chemical potential using gauge/gravity duality. By incorporating angular velocity into the holographic magnetic catalysis model, we analyze the influence of temperature, chemical potential, magnetic field, and angular velocity on the properties of <jats:inline-formula><jats:alternatives><jats:tex-math>$$J/\Psi $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mrow>
<mml:mi>J</mml:mi>
<mml:mo>/</mml:mo>
<mml:mi>Ψ</mml:mi>
</mml:mrow>
</mml:math></jats:alternatives></jats:inline-formula> meson. The results reveal that temperature, chemical potential, and rotation enhance the dissociation effect and increase the effective mass in the QGP phase. However, the magnetic field suppresses dissociation, and its effect on the effective mass is non-trivial. Additionally, we explore the interplay between magnetic field and rotation, identifying a critical angular velocity that determines the dominant effect. As a parallel study, we also examine the rotation effect in the holographic inverse magnetic catalysis model, although the magnetic field exhibits distinctly different behaviors in these two models, the impact of rotation on the dissociation effect of <jats:inline-formula><jats:alternatives><jats:tex-math>$$J/\Psi $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mrow>
<mml:mi>J</mml:mi>
<mml:mo>/</mml:mo>
<mml:mi>Ψ</mml:mi>
</mml:mrow>
</mml:math></jats:alternatives></jats:inline-formula> is similar. Finally, we investigate the influence of electric field and demonstrate that it also speeds up the <jats:inline-formula><jats:alternatives><jats:tex-math>$$J/\Psi $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mrow>
<mml:mi>J</mml:mi>
<mml:mo>/</mml:mo>
<mml:mi>Ψ</mml:mi>
</mml:mrow>
</mml:math></jats:alternatives></jats:inline-formula> dissociation.</jats:p>
作者机构：
[Hou, Defu; Hou, DF; Jia, Moran; Li, Huixia; Jia, MR] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Hubei, Peoples R China.;Cent China Normal Univ, Key Lab Quark & Lepton Phys MOS, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Hou, DF ; Jia, MR] C;Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Hubei, Peoples R China.
关键词：
Direct photon;Collective flows;Strong magnetic field;Evolving glasma
摘要：
We present an event-by-event study of photon production in early stage of high energy nuclear collisions, where the system is dominant by highly occupied of gluons and initialized by McLerran-Venugopalan model. The photons are produced through the gluon fusion and splitting processes when strong magnetic field is included. We study the spectra and collective flows of the photons and show their dependence on transverse momentum q(T). It is found that in our approach the photons from boost invariant evolving glasma provide visible enhancement on spectrum and obvious contribution on v(2) of the total direct photons. The results, by weighting on top of parton-hadron-string dynamics (PHSD) model, agree even better with experiment measurements in Au-Au 20%-40% centrality collisions at root(NN)-N-s = 200 GeV. (c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons .org /licenses /by /4 .0/). Funded by SCOAP(3).
作者机构：
[Zhang, Zi-qiang; Zhang, ZQ] China Univ Geosci, Sch Math & Phys, Wuhan 430074, Peoples R China.;[Zhu, Xiangrong] Huzhou Univ, Sch Sci, Huzhou 313000, Peoples R China.;[Hou, De-fu] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, ZQ ] C;China Univ Geosci, Sch Math & Phys, Wuhan 430074, Peoples R China.
摘要：
Using AdS/CFT correspondence, we study the imaginary part of heavy quarkonia potential from thermal fluctuations in a strongly coupled plasma. We perform the analysis in a rotating deformed AdS black-hole background. It is shown that the presence of angular velocity decreases the onset of imaginary potential thus enhancing quarkonia dissociation, in agreement with previous findings of the entropic force. Moreover, by increasing angular velocity, the thermal width becomes smaller.(c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons .org /licenses /by /4 .0/). Funded by SCOAP3.
期刊：
Journal of High Energy Physics,2023年2023(4):1-23 ISSN：1029-8479
通讯作者：
Zhibin Li
作者机构：
[Hou, Defu; Zhao, Yan-Qing] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Hou, Defu; Zhao, Yan-Qing] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOS, Wuhan 430079, Peoples R China.;[He, Song] Jilin Univ, Ctr Theoret Phys, Changchun 130012, Peoples R China.;[He, Song] Jilin Univ, Coll Phys, Changchun 130012, Peoples R China.;[He, Song] Albert Einstein Inst, Max Planck Inst Grav Phys, Muhlenberg 1, D-14476 Golm, Germany.
通讯机构：
[Zhibin Li] S;School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, China
关键词：
Holography and Hydrodynamics;AdS-CFT Correspondence;Gauge-Gravity Correspondence
摘要：
We study the rotation effects of the hot and dense QCD matter in a non-perturbative regime by the gauge/gravity duality. We use the gravitational model that is designated to match the state-of-the-art lattice data on the thermal properties of (2+1)-flavor QCD and predict the location of the critical endpoint and the first-order phase transition line at large baryon chemical potential without rotation. After introducing the angular velocity via a local Lorentz boost, we investigate the thermodynamic quantities for the system under rotation in a self-consistent way. We find that the critical temperature and baryon chemical potential associated with the QCD phase transition decrease as the angular velocity increases. Moreover, some interesting phenomena are observed near the critical endpoint. We then construct the 3-dimensional phase diagram of the QCD matter in terms of temperature, baryon chemical potential, and angular velocity. As a parallel investigation, we also consider the gravitational model of SU(3) pure gluon system, for which the 2-dimensional phase diagram associated with temperature and angular velocity has been predicted. The corresponding thermodynamic quantities with rotation are investigated.
作者机构：
[赵彦清; 朱洲润; 侯德富] Institute of Particle Physics, Key Laboratory of Quark and Lepton Physics (MOS), Central China Normal University, Wuhan, 430079, China
通讯机构：
[Hou, D.] I;Institute of Particle Physics, China
期刊：
EUROPEAN PHYSICAL JOURNAL C,2023年83(5):1-6 ISSN：1434-6044
通讯作者：
Zhang, ZQ
作者机构：
[Zhang, Zi-qiang; Zhang, ZQ] China Univ Geosci Wuhan, Sch Math & Phys, Wuhan 430074, Peoples R China.;[Zhu, Xiangrong] Huzhou Univ, Sch Sci, Huzhou 313000, Peoples R China.;[Hou, De-fu] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, ZQ ] C;China Univ Geosci Wuhan, Sch Math & Phys, Wuhan 430074, Peoples R China.
摘要：
<jats:title>Abstract</jats:title><jats:p>We study finite-coupling corrections on the energy loss of light quarks in strongly coupled <jats:inline-formula><jats:alternatives><jats:tex-math>$${\mathcal {N}}=4$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mrow>
<mml:mi>N</mml:mi>
<mml:mo>=</mml:mo>
<mml:mn>4</mml:mn>
</mml:mrow>
</mml:math></jats:alternatives></jats:inline-formula> super Yang–Mills (SYM) plasma. We perform the analysis by computing the stopping distance of an image jet induced by a massless source field, characterized by a massless particle falling along the null geodesic in Einstein gravity with curvature-squared (<jats:inline-formula><jats:alternatives><jats:tex-math>$$R^2$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msup>
<mml:mi>R</mml:mi>
<mml:mn>2</mml:mn>
</mml:msup>
</mml:math></jats:alternatives></jats:inline-formula>) corrections. It turns out that the stopping distance in the <jats:inline-formula><jats:alternatives><jats:tex-math>$$R^2$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msup>
<mml:mi>R</mml:mi>
<mml:mn>2</mml:mn>
</mml:msup>
</mml:math></jats:alternatives></jats:inline-formula> theories can be larger or smaller than its SYM counterpart depending on the higher-derivative coefficients. Moreover, we evaluate the stopping distance in the Gauss–Bonnet background and find that increasing <jats:inline-formula><jats:alternatives><jats:tex-math>$$\lambda _\textrm{GB}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msub>
<mml:mi>λ</mml:mi>
<mml:mtext>GB</mml:mtext>
</mml:msub>
</mml:math></jats:alternatives></jats:inline-formula> (a dimensionless parameter in Gauss–Bonnet gravity) leads to a decrease in the stopping distance, thus enhancing the energy loss of light quarks, in agreement with previous findings for the drag force, jet quenching parameter, and the instantaneous energy loss of light quarks using shooting strings.</jats:p>
摘要：
To better understand the effects of strong coupling and QCD at high temperature in QGP, by using holographic model, we investigate the dissociation effect of bottomonium under the higher-order curvature corrections to the supergravity action corresponding to the corrections of large N expansion of boundary CFT in the side of field theory. The results show that effective potential is not a good physical quantity to estimate the dissociation strength of bottomonium in the case of finite wave number and considering the higher-order curvature corrections. Therefore, we calculate the quasinormal spectra (QNMs) and the differential configuration entropy (DCE). It is found that the dissociation effect is stronger for the stronger coupling.
摘要：
Using the anti-de Sitter/conformal field theory (AdS/CFT) correspondence, we study the holographic Schwinger effect in an anisotropic background with the Gauss-Bonnet term. As the background geometry is anisotropic, we consider both cases of the test particle pair and the electric field perpendicular to and parallel to the anisotropic direction. It is shown that the Schwinger effect is enhanced in the perpendicular case when anisotropy rises. In the parallel case, this effect is reversed. Additionally, the potential barrier and the critical electric field in the parallel case are more significantly modified by anisotropy compared to the perpendicular case. We also find that the presence of the Gauss-Bonnet coupling tends to increase the Schwinger effect.
作者机构：
[Ren, Hai-Cang; Yang, Shu-Yun; Hou, De-Fu; Dong, Ren-Da] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Ren, Hai-Cang; Yang, Shu-Yun; Hou, De-Fu; Dong, Ren-Da] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOS, Wuhan 430079, Peoples R China.;[Ren, Hai-Cang] Rockefeller Univ, Phys Dept, 1230 York Ave, New York, NY 10021 USA.
通讯机构：
[Ren, HC ; Hou, DF] C;Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;Cent China Normal Univ, Key Lab Quark & Lepton Phys MOS, Wuhan 430079, Peoples R China.;Rockefeller Univ, Phys Dept, 1230 York Ave, New York, NY 10021 USA.
摘要：
We explored the interplay between magnetic field and rotation in the de Hass–van Alphen oscillation. The effect is found to be reduced because of the reweighting of different angular momentum states within the same Landau level by rotation energy. The implications of our results on high energy physics and condensed matter physics are discussed.
作者机构：
[Mamani, Luis A. H.] Univ Estadual Regiao Tocantina Maranhao, Ctr Ciencias Exatas Nat & Tecnol, Rua Godofredo Viana 1300, BR-65901480 Imperatriz, Maranhao, Brazil.;[Hou, Defu] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Hou, Defu] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOS, Wuhan 430079, Peoples R China.;[Braga, Nelson R. F.] Univ Fed Rio de Janeiro, Inst Fis, Caixa Postal 68528, BR-21941972 Rio De Janeiro, RJ, Brazil.
摘要：
In this work, we investigate, for the first time, the melting of charmonium states within a holographic QCD model in the context of Einstein-Maxwell-dilaton theory. In the dual field theory, the model describes the heavy mesons inside a finite temperature and density medium. First, we calculate the spectrum at zero temperature. Then, at finite temperature, we obtain the spectral functions, where the heavy vector meson are represented by peaks. We show that the charmonium melts down at temperatures above the confinement/deconfinement temperature of the quark-gluon plasma. We also observe that the chemical potential speeds up the melting process. In the gravitational side of the theory, we solve the perturbation equations in the hydrodynamic limit. From this result, we read off the diffusion coefficient, then the quark number susceptibility. We show that the quark number susceptibility computed in this way does not blow up at the critical end point. We interpret this result as the lack of backreaction on the background by the action describing the vector mesons. To get the quasinormal frequencies, we solve the perturbation equations numerically. We report the emergence of a new mode whose real part increases rapidly at a certain value of the chemical potential, while its imaginary part decreases with the increasing of the chemical potential. Finally, by comparing against results obtained in the conformal plasma, we observe that the real part of the frequency increases, while the imaginary part decreases when we consider the nonconformal plasma.
期刊：
EUROPEAN PHYSICAL JOURNAL C,2022年82(12) ISSN：1434-6044
通讯作者：
Hou, D.
作者机构：
[Hou, Defu; Zhao, Yan-Qing] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;Cent China Normal Univ, Key Lab Quark & Lepton Phys MOS, Wuhan 430079, Peoples R China.
通讯机构：
[Hou, D.] I;Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics (MOS), China
摘要：
<jats:title>Abstract</jats:title><jats:p>By using gauge/gravity duality, we calculate the spectral function of the heavy vector mesons with the presence of an intense magnetic field in a hot and dense medium. The results show that, a general conclusion, as the increases of magnetic field, chemical potential and temperature, the height of the peak of the spectral function decreases and the width increases. A nontrivial result is the change from the peak position of spectral function. We explain this non-trivial behavior by the interplay of the interaction between the two heavy quarks and the interaction between the medium with each of the heavy quarks.</jats:p>
