scholarly journals A novel massless mode in hot QCD

2015 ◽  
Author(s):  
Nan Su
Keyword(s):  
Massless Mode

scholarly journals De Sitter braneworld and gravitational waves

2021 ◽  
Author(s):  
Dong-Yu Li ◽  
Zhao-Xiang Wu ◽  
Hao Hu ◽  
Bao-Min Gu
Keyword(s):  
Gravitational Waves ◽  
Scalar Fields ◽  
Background Solution ◽  
De Sitter ◽  
Dimensional Theory ◽  
Massive Mode ◽  
Large Extra Dimension ◽  
Mass Gap ◽  
Massless Mode ◽  
Background Fields

We study the braneworld theory constructed by multi scalar fields. The model contains a smooth and infinitely large extra dimension, allowing the background fields propagating in it. We give a de Sitter solution for the four-dimensional cosmology as a good approximation to the early universe inflation. We show that the graviton has a localizable massless mode, and a series of continuous massive modes, separated by a mass gap. There could be a normalizable massive mode, depending on the background solution. The gravitational waves of massless mode evolve the same as the four dimensional theory, while that of the massive modes evolve greatly different from the massless mode.

scholarly journals Thick string-like braneworlds in f(T) gravity

2021 ◽  
pp. 2150047
Author(s):  
A. R. P. Moreira ◽  
J. E. G. Silva ◽  
D. F. S. Veras ◽  
C. A. S. Almeida
Keyword(s):  
Energy Condition ◽  
Energy Conditions ◽  
Exterior Region ◽  
Potential Wells ◽  
Codimension Two ◽  
Gravitational Perturbations ◽  
Linear Behavior ◽  
Massless Mode ◽  
Stress Energy ◽  
Ring Structures

We propose a codimension two warped braneworld model within the teleparallel [Formula: see text] gravity. Asymptotically, the bulk geometry converges to an [Formula: see text] spacetime whose cosmological constant is produced by the torsion parameters. Furthermore, the torsion induces an AdS-dS transition on the exterior region. As the torsion parameters vary, the brane undergoes a phase transition from a thick string-like brane into ring-like structures. The bulk-brane Planck mass ration is modified by the torsion. The analysis of the stress–energy condition reveals a splitting brane process satisfying the weak and strong–energy conditions for some values of the parameters. In addition, we investigate the behavior of the gravitational perturbations in this scenario. It turns out that the gravitational spectrum has a linear behavior for small masses and is independent of the torsion parameters for large masses. In the bulk, the torsion keeps a gapless nonlocalizable and stable tower of massive modes. Inside the brane core, the torsion produces new barriers and potential wells leading to small amplitude massive modes and a massless mode localized around the ring structures.

scholarly journals Teleparallel gravity: Effects of torsion in 6D braneworlds

2021 ◽  
Author(s):  
A. R. P. Moreira ◽  
J. E. G. Silva ◽  
C. A. S. Almeida
Keyword(s):  
Teleparallel Gravity ◽  
New Physics ◽  
Beyond The Standard Model ◽  
Potential Wells ◽  
Codimension Two ◽  
Gravitational Perturbations ◽  
Massless Mode ◽  
The Standard Model ◽  
Gravity Effects ◽  
Ring Structures

Braneworld models are interesting theoretical and phenomenological frameworks to search for new physics beyond the standard model of particles and cosmology. In this work, we discuss braneworld models whose gravitational dynamics is governed by teleparallel [Formula: see text] gravities. Here, we emphasize a codimension two-axisymmetric model, also known as a string-like brane. Likewise, in the 5D domain-wall models, the [Formula: see text] gravitational modification leads to a phase transition on the perfect fluid source providing a brane-splitting mechanism. Furthermore, the torsion changes the gravitational perturbations. The torsion produces new potential wells inside the brane core leading to a massless mode more localized around the ring structures. In addition, the torsion keeps a gapless nonlocalizable and a stable tower of massive modes in the bulk.

Massless Mode in Abrikosov Flux Lattice. II. Elastic Modes and Superconducting Order

1992 ◽  
Vol 61 (1) ◽  
pp. 254-274 ◽  
Author(s):  
Ryusuke Ikeda ◽  
Tetsuo Ohmi ◽  
Toshihiko Tsuneto
Keyword(s):  
Massless Mode ◽  
Flux Lattice ◽  
Elastic Modes

scholarly journals BRANE WORLD IN A TOPOLOGICAL BLACK HOLE BULK

2001 ◽  
Vol 16 (29) ◽  
pp. 1887-1894 ◽  
Author(s):  
DANNY BIRMINGHAM ◽  
MASSIMILIANO RINALDI
Keyword(s):  
Black Hole ◽  
Brane World ◽  
Black Hole Mass ◽  
Large Black Hole ◽  
Massless Mode ◽  
Arbitrary Dimensions

We consider a static brane in the background of a topological black hole in arbitrary dimensions. For hyperbolic horizons, we find a solution only when the black hole mass assumes its minimum negative value. In this case, the tension of the brane vanishes, and the brane position coincides with the location of the horizon. For an elliptic horizon, we show that the massless mode of Randall–Sundrum is recovered in the limit of large black hole mass.

Current-induced massless mode of the interband phase difference in two-band superconductors

2015 ◽  
Vol 516 ◽  
pp. 10-16 ◽  
Author(s):  
Y. Tanaka ◽  
I. Hase ◽  
T. Yanagisawa ◽  
G. Kato ◽  
T. Nishio ◽  
...  
Keyword(s):  
Phase Difference ◽  
Massless Mode

scholarly journals RADIATIVE CORRECTIONS TO THE PRESSURE AND THE ONE-LOOP POLARIZATION TENSOR OF MASSLESS MODES IN SU(2) YANG–MILLS THERMODYNAMICS

2007 ◽  
Vol 22 (06) ◽  
pp. 1213-1237 ◽  
Author(s):  
MARKUS SCHWARZ ◽  
RALF HOFMANN ◽  
FRANCESCO GIACOSA
Keyword(s):  
Atomic Hydrogen ◽  
Black Body ◽  
Coulomb Gauge ◽  
Polarization Tensor ◽  
Radiative Corrections ◽  
Loop Correction ◽  
Yang Mills ◽  
Massless Mode ◽  
The Stability ◽  
The One

We compute the one-loop polarization tensor Π for the on-shell, massless mode in a thermalized SU(2) Yang–Mills theory being in its deconfining phase. Postulating that [Formula: see text], we discuss Π's effect on the low-momentum part of the black-body spectrum at temperatures ~2,…,4 T CMB where T CMB ~ 2.73 K . A table-top experiment is proposed to test the above postulate. As an application, we point out a possible connection with the stability of dilute, cold, and old innergalactic atomic hydrogen clouds. We also compute the two-loop correction to the pressure arising from the instantaneous massless mode in unitary-Coulomb gauge, which formerly was neglected, and present improved estimates for subdominant corrections.

scholarly journals The future of gravitational theories in the era of the gravitational wave astronomy

2018 ◽  
Vol 27 (05) ◽  
pp. 1850060 ◽  
Author(s):  
Christian Corda
Keyword(s):  
Gravitational Wave ◽  
Response Function ◽  
Massive Mode ◽  
Gravitational Theories ◽  
Massless Mode ◽  
The Future ◽  
Theories Of Gravity ◽  
Theoretical Results

We discuss the future of gravitational theories in the framework of gravitational wave (GW) astronomy after the recent GW detections (the events GW150914, GW151226, GW170104, GW170814, GW170817 and GW170608). In particular, a calculation of the frequency and angular dependent response function that a GW detector would see if massive modes from [Formula: see text] theories or scalar–tensor gravity (STG) were present, allowing for sources incident from any direction on the sky, is shown. In addition, through separate theoretical results which do not involve the recent GW detections, we show that [Formula: see text] theories of gravity having a third massless mode are ultimately ruled out while there is still room for STG having a third (massive or massless) mode and for [Formula: see text] theories of gravity having a third massive mode.

scholarly journals CORRELATION OF ENERGY DENSITY IN DECONFINING SU(2) YANG–MILLS THERMODYNAMICS

2008 ◽  
Vol 23 (32) ◽  
pp. 5181-5200 ◽  
Author(s):  
JOCHEN KELLER ◽  
RALF HOFMANN ◽  
FRANCESCO GIACOSA
Keyword(s):  
Energy Density ◽  
Atomic Hydrogen ◽  
Milky Way ◽  
Yang Mills ◽  
Massless Mode ◽  
Point Correlation

We compute the two-point correlation of the energy density for the massless mode in deconfining SU(2) Yang–Mills thermodynamics and point towards a possible application for the physics of cold, dilute, and stable clouds of atomic hydrogen within the Milky Way.

The Polarization Tensor of the Massless Mode in Yang-Mills Thermodynamics

2011 ◽  
Author(s):  
Markus Schwarz ◽  
Theodore E. Simos ◽  
George Psihoyios ◽  
Ch. Tsitouras ◽  
Zacharias Anastassi
Keyword(s):  
Polarization Tensor ◽  
Yang Mills ◽  
Massless Mode
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