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.

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 From correlation functions to event shapes in QCD

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
D. Chicherin ◽  
J. M. Henn ◽  
E. Sokatchev ◽  
K. Yan
Keyword(s):  
Correlation Function ◽  
Correlation Functions ◽  
Event Shape ◽  
Proof Of Concept ◽  
Yang Mills ◽  
Point Correlation ◽  
Point Correlation Function ◽  
Event Shapes ◽  
A Charge ◽  
Conserved Currents

Abstract We present a method for calculating event shapes in QCD based on correlation functions of conserved currents. The method has been previously applied to the maximally supersymmetric Yang-Mills theory, but we demonstrate that supersymmetry is not essential. As a proof of concept, we consider the simplest example of a charge-charge correlation at one loop (leading order). We compute the correlation function of four electromagnetic currents and explain in detail the steps needed to extract the event shape from it. The result is compared to the standard amplitude calculation. The explicit four-point correlation function may also be of interest for the CFT community.

scholarly journals TRACING THE MILKY WAY NUCLEAR WIND WITH 21 cm ATOMIC HYDROGEN EMISSION

2016 ◽  
Vol 826 (2) ◽  
pp. 215 ◽  
Author(s):  
Felix J. Lockman ◽  
N. M. McClure-Griffiths
Keyword(s):  
Atomic Hydrogen ◽  
Milky Way ◽  
Hydrogen Emission

scholarly journals Neutral Hydrogen in the Magellanic Clouds

1999 ◽  
Vol 190 ◽  
pp. 37-44
Author(s):  
L. Staveley-Smith ◽  
S. Kim ◽  
S. Stanimirović
Keyword(s):  
Atomic Hydrogen ◽  
Large Scale ◽  
Milky Way ◽  
Velocity Dispersion ◽  
Neutral Hydrogen ◽  
Distribution Functions ◽  
Magellanic Clouds ◽  
Self Gravity ◽  
Rotational Shear ◽  
Compact Array

We review observations of neutral atomic hydrogen (HI) in the Magellanic Clouds (MCs). Being the nearest gas-rich neighbours of the Milky Way the MCs give us an excellent opportunity to study in detail the structure and evolution of the interstellar medium (ISM) and the effect of interactions between galaxies. HI in emission provides a probe of the structure and velocity field of the Clouds, allowing the study of their velocity dispersion, 3-D structure, and large-scale total-mass distribution. Recent data from Australia Telescope Compact Array surveys reveal a morphology (for both Clouds) which is heavily dominated by the effects of local star-formation, rotational shear, fragmentation, self-gravity and turbulence. The new data, which has a spatial resolution down to 10 pc, also allows the study of the distribution functions in velocity and mass for HI clouds. We discuss the morphology, dynamics and giant shell population of the LMC and SMC.

SAVVIDY VACUUM IN SU(2) YANG–MILLS THEORY

2005 ◽  
Vol 20 (22) ◽  
pp. 1655-1662 ◽  
Author(s):  
DANIEL KAY ◽  
A. KUMAR ◽  
R. PARTHASARATHY
Keyword(s):  
Energy Density ◽  
Imaginary Part ◽  
Functional Integral ◽  
Quadratic Approximation ◽  
Effective Energy ◽  
The Real ◽  
Yang Mills ◽  
The One

The one-loop effective energy density of a pure SU (2) Yang–Mills theory in the Savvidy background is reconsidered. The stable and the unstable modes are identified. The stable modes are treated in the quadratic approximation. For the unstable modes, the full expansion including the cubic and the quartic terms in the fluctuations is used. The functional integral for the unstable modes is evaluated and added to the result for the stable modes. The resulting energy density coincides with the real part in the quadratic approximation of earlier studies and there is now no imaginary part.

scholarly journals Three-point correlation functions in Yang-Mills theory

2013 ◽  
Vol 88 (12) ◽  
Author(s):  
Marcela Peláez ◽  
Matthieu Tissier ◽  
Nicolás Wschebor
Keyword(s):  
Correlation Functions ◽  
Yang Mills ◽  
Point Correlation

scholarly journals DYONS OF ONE-HALF MONOPOLE CHARGE

2006 ◽  
Vol 21 (26) ◽  
pp. 5285-5298
Author(s):  
ROSY TEH ◽  
KHAI-MING WONG
Keyword(s):  
Energy Density ◽  
Electromagnetic Fields ◽  
Axially Symmetric ◽  
Yang Mills ◽  
First Order ◽  
Line Singularity ◽  
Infinite Energy

We would like to present some exact SU(2) Yang–Mills–Higgs dyon solutions of one-half monopole charge. These static dyon solutions satisfy the first order Bogomol'nyi equations and are characterized by a parameter, m. They are axially symmetric. The gauge potentials and the electromagnetic fields possess a string singularity along the negative z-axis and hence they possess infinite energy density along the line singularity. However the net electric charges of these dyons which varies with the parameter m are finite.

scholarly journals Tracing the Spiral Structure of the Outer Milky Way with Dense Atomic Hydrogen Gas

2017 ◽  
Vol 129 (979) ◽  
pp. 094102 ◽  
Author(s):  
Bon-Chul Koo ◽  
Geumsook Park ◽  
Woong-Tae Kim ◽  
Myung Gyoon Lee ◽  
Dana S. Balser ◽  
...  
Keyword(s):  
Atomic Hydrogen ◽  
Milky Way ◽  
Spiral Structure ◽  
Hydrogen Gas
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