scholarly journals Mass Spectra and Decay of Mesons under Strong External Magnetic Field

2021 ◽  
Author(s):  
Shuyun Yang ◽  
Meng Jin ◽  
DeFu Hou
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Mass Spectra ◽  
Chemical Potential ◽  
Energy Gap ◽  
Random Phase ◽  
High Energy ◽  
Decay Process ◽  
Triangle Diagram ◽  
Magnetic Catalysis

Abstract We study the mass spectra and decay process of σ and π0 mesons under strong external magnetic field. To achieve this goal, we deduce the thermodynamic potential in a two-flavor, hot and magnetized Nambu-Jona-Lasinio model. We calculate the energy gap equation through the random phase approximation (RPA). Then we use Ritus method to calculate the decay triangle diagram and self-energy in the presence of a constant magnetic field B. Our results indicate that the magnetic field has little influence on the mass of π0 at low temperatures. While for quarks and σ mesons, their mass changes obviously, which reflects the influence of magnetic catalysis (MC). The presence of magnetic field accelerates the decay of the meson while the presence of chemical potential will decrease the decay process. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

Chiral condensate of cold dense quark matter with external magnetic field

2020 ◽  
Vol 35 (19) ◽  
pp. 2050160
Author(s):  
Song Shi ◽  
Juan Liu
Keyword(s):  
Magnetic Field ◽  
Phase Diagram ◽  
External Magnetic Field ◽  
Quark Matter ◽  
Chemical Potential ◽  
Field Approximation ◽  
Chiral Condensate ◽  
Mean Field Approximation ◽  
Dynamical Mass ◽  
Dense Quark Matter

At zero temperature and finite chemical potential, the gap equation of cold dense quark matter under external magnetic field is studied with NJL model in the mean-field approximation. By introducing new methods, it is found that the Nambu phase has sophisticated structures which have not been studied before. As a consequence, the phase diagram is expanded and divided into five areas, in each area the condensate has unique behaviors with chemical potential varying. Furthermore, the expanded phase diagram is used to predict the order of phase transition between the Nambu phase and the Wigner phase, it can also be used to explain the relations of dynamical mass and chemical potential. Meanwhile, the metastable states and cascade effect of dynamical mass are studied in this paper.

RADIATIVE DECAY OF A MASSIVE NEUTRINO IN THE WEINBERG–SALAM MODEL WITH MIXING IN A CONSTANT UNIFORM MAGNETIC FIELD

1996 ◽  
Vol 11 (39n40) ◽  
pp. 3119-3126 ◽  
Author(s):  
V. CH. ZHUKOVSKY ◽  
P.A. EMINOV ◽  
A.E. GRIGORUK
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Neutrino Mass ◽  
Uniform Magnetic Field ◽  
Radiative Decay ◽  
Decay Process ◽  
Linearly Polarized ◽  
Free Case ◽  
Neutrino Decay ◽  
Broad Region

Influence of an external magnetic field on the neutrino decay process with emission of a linearly polarized photon is considered. The decay rate is shown to be enhanced as compared to the free case in the broad region where both the nonvanishing neutrino mass and the field make substantial contributions. In the limit of a negligible neutrino mass the emitted photons are totally linearly polarized, which may help in the identification of these photons.

scholarly journals Specific heat measurements of a superconductingNbS2single crystal in an external magnetic field: Energy gap structure

2010 ◽  
Vol 82 (1) ◽  
Author(s):  
J. Kačmarčík ◽  
Z. Pribulová ◽  
C. Marcenat ◽  
T. Klein ◽  
P. Rodière ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Specific Heat ◽  
Energy Gap ◽  
Field Energy ◽  
Magnetic Field Energy ◽  
Gap Structure

Magnetohydrodynamics of laser-produced high-energy-density plasma in a strong external magnetic field

2017 ◽  
Vol 95 (5) ◽  
Author(s):  
Kazuki Matsuo ◽  
Hideo Nagatomo ◽  
Zhe Zhang ◽  
Philippe Nicolai ◽  
Takayoshi Sano ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Density Plasma

Focusing of high-energy particles by a plasma current lens controlled by an external magnetic field

2000 ◽  
Vol 26 (4) ◽  
pp. 351-355
Author(s):  
V. N. Belan ◽  
V. I. Butenko ◽  
A. M. Egorov ◽  
B. I. Ivanov ◽  
V. A. Kiselev ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
High Energy ◽  
Plasma Current ◽  
High Energy Particles

Effect of External Magnetic Field on the Microstructure of 316L Stainless Steel Fabricated by Directed Energy Deposition

2019 ◽  
Author(s):  
Jin Wang ◽  
Yachao Wang ◽  
Jing Shi ◽  
Yutai Su
Keyword(s):  
Magnetic Field ◽  
Stainless Steel ◽  
External Magnetic Field ◽  
Energy Deposition ◽  
316L Stainless Steel ◽  
High Energy ◽  
Layer By Layer ◽  
Horizontal Magnetic Field ◽  
Directed Energy Deposition ◽  
Directed Energy

Abstract Directed energy deposition (DED) is a major additive manufacturing (AM) process, which employs high energy beams as the heat source to melt and deposit metal powder in a layer-by-layer fashion such that complex components can be manufactured. In this study, a magnetic-field-assisted DED method is applied to control the microstructure and element distribution in the deposited materials. For this purpose, to control the microstructure of DED-built 316L stainless steel, a horizontal magnetic field is introduced during the DED process at different levels of magnetic field intensities (i.e., 0T, 1.0T and 1.8T). Scanning electron microscopy (SEM) and energy dispersive X-Ray spectroscopy (EDS) are used to characterize the microstructure of components obtained with different magnetic field strengths. The results show that the microstructure of deposited materials is significantly affected by the external magnetic field. Also, the result of interdendritic microsegregation pattern presents a transformation from continuous morphology to discrete morphology because of the applied magnetic field. Along with the increasing horizontal magnetic field intensity, nickel and chromium content are changed significantly in austenite and ferrite.

scholarly journals Effect of external magnetic field on the co-existence of superconductivity and antiferromagnetism in rare earth nickel borocarbides (RNi2B2C)

2016 ◽  
Vol 30 (08) ◽  
pp. 1650044
Author(s):  
Salila Das ◽  
Prakash Chandra Padhi
Keyword(s):  
Magnetic Field ◽  
Rare Earth ◽  
External Magnetic Field ◽  
Energy Gap ◽  
Density Wave ◽  
Spin Density Wave ◽  
Mean Field ◽  
Antiferromagnetic Order ◽  
Superconducting Energy Gap ◽  
Nickel Borocarbides

In this paper, we have studied the effect of external magnetic field in the co-existing phase of superconducting and antiferromagnetism (AFM) of rare earth nickel borocarbides. The AFM in these systems might have originated due to both localized “f” electrons as well as itinerant electrons which are responsible for conduction. On the other hand, superconductivity (SC) is due to spin density wave, arising out of Fermi surface instability. The AFM order is mostly influenced by hybridization of the “f” electron with the conduction electron. Here, we have obtained the dependence of superconducting energy gap as well as staggered magnetic field on temperature T and energy [Formula: see text] in a framework based on mean field Hamiltonian using double time electron Green’s function. We have shown in our calculation the effect of external magnetic field on superconducting and antiferromagnetic order parameters for [Formula: see text] in the presence of hybridization. The ratio of the calculated effective gap and [Formula: see text] is close to BCS value which agrees quite well with experimental results.

scholarly journals Deconfinement of heavy quarks at finite density and strong magnetic field

2020 ◽  
Vol 229 (22-23) ◽  
pp. 3387-3394
Author(s):  
Michał Szymański
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Heavy Quark ◽  
Critical Point ◽  
Strong Magnetic Field ◽  
Chemical Potential ◽  
Heavy Quarks ◽  
Polyakov Loop ◽  
Finite Density ◽  
Simultaneous Effect

AbstractWe study the simultaneous effect of the external magnetic field and finite chemical potential on deconfinement of heavy quarks, probed by the Polyakov loop and its fluctuations. We calculate the Polyakov loop, its real and imaginary susceptibilities, their ratio, as well as the heavy quark and anti-quark entropies. We find that these quantities are sensitive probes of deconfinement. Especially, the real Polyakov loop susceptibility and heavy quark and anti-quark entropies diverge at the critical point.

scholarly journals Holographic model for heavy quarks in anisotropic hot dense QGP with external magnetic field

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Irina Ya. Aref’eva ◽  
Kristina Rannu ◽  
Pavel Slepov
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Chemical Potential ◽  
Heavy Ion ◽  
Heavy Quarks ◽  
Maxwell Field ◽  
Holographic Model ◽  
Ion Collisions ◽  
Maxwell Fields ◽  
Transition Curves

Abstract We present a five-dimensional fully anisotropic holographic model supported by Einstein-dilaton-three-Maxwell action. One of the Maxwell fields provides chemical potential; finite chemical potential values are considered. The second Maxwell field serves for anisotropy, representing real spacial anisotropy of the QGP produced in heavy-ion collisions. The third Maxwell field is related to an external magnetic field. Influence of the external magnetic field on the 5-dim black hole solution and the confinement/deconfinement phase diagram, reconstructing the phase transition curves for heavy quarks, is considered. The effect of the inverse magnetic catalyses is revealed and positions of critical end points are found.

Sign in / Sign up

Export Citation Format

Share Document