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This work is dedicated to the study of a technique for hadron identification in the TeV momentum range, based on the simultaneous measurement of the energies and of the emission angles of the Transition Radiation (TR) X-rays with respect to…

The Planck spectrum of thermal scalar radiation is derived suggestively within classical physics by the use of an accelerating coordinate frame. The derivation has an analogue in Boltzmann's derivation of the Maxwell velocity distribution…

Classical Physics · Physics 2012-07-25 Timothy H. Boyer

A relativistic particle undergoing successive boosts which are non collinear will experience a rotation of its coordinate axes with respect to the boosted frame. This rotation of coordinate axes is caused by a relativistic phenomenon called…

Classical Physics · Physics 2019-04-05 Lakshya Malhotra , Robert Golub , Eva Kraegeloh , Nima Nouri , Bradley Plaster

In recent years, there are increasing evidence for a thermal emission component that accompanies the overall non-thermal spectra of the prompt emission phase in GRBs. Both the temperature and flux of the thermal emission show a well defined…

Astrophysics · Physics 2009-11-13 Asaf Pe'er

A small dipole oscillator moving along a circular trajectory in zero-point electromagnetic field ( ZPF ) and with a polarization normal to the rotation plane, is considered. Temporal periodicity conditions are imposed on ZPF, associated…

Quantum Physics · Physics 2016-06-14 Yefim S. Levin

X-ray transition radiation can be used to measure the Lorentz factor of relativistic particles. Standard transition radiation detectors (TRDs) typically incorporate thin plastic foil radiators and gas-filled x-ray detectors, and are…

High Energy Physics - Experiment · Physics 2009-11-07 Gary L. Case , P. Parker Altice , Michael L. Cherry , Joachim Isbert , John W. Mitchell , Donald Patterson

We investigate the influence of global rotation on the chemical freeze-out parameters in ultra-relativistic heavy-ion collisions. Within the framework of the hadron resonance gas (HRG) model, the freeze-out parameters are determined using…

High Energy Physics - Phenomenology · Physics 2026-03-31 Nandita Padhan , Kshitish Kumar Pradhan , Arghya Chatterjee , Raghunath Sahoo

X-Ray Thomson Scattering (XRTS) is an important experimental technique used to measure the temperature, ionization state, structure, and density of warm dense matter (WDM). The fundamental property probed in these experiments is the…

Measured rotational speeds of giant planets and brown dwarfs frequently constitute appreciable fractions of the breakup limit, resulting in centrifugal expansion of these objects at the equator. According to models of internal energy…

Earth and Planetary Astrophysics · Physics 2022-10-26 Mikhail Lipatov , Timothy D. Brandt , Natasha E. Batalha

This paper initiates the systematic study of thermal field theory for generic equilibrium density matrices, which feature arbitrary values not only of temperature and chemical potentials, but also of average angular momentum. The focus here…

High Energy Physics - Theory · Physics 2026-05-05 Alberto Salvio

This paper provides a systematic and complete study of thermal field theory with fermion fields of any kind for generic equilibrium density matrices, which feature arbitrary values not only of temperature and chemical potentials, but also…

High Energy Physics - Phenomenology · Physics 2026-05-19 Alberto Salvio

We show that effects similar to those for a rotating black hole arise for an observer using a uniformly rotating reference frame in a flat space-time: a surface appears such that no body can be stationary beyond this surface, while the…

General Relativity and Quantum Cosmology · Physics 2019-11-28 A. A. Grib , Yu. V. Pavlov

Classical electromagnetic radiation from moving point charges is foundational, but the thermal dynamics responsible for classical acceleration temperature are poorly understood. We investigate the thermal properties of classical…

Quantum Physics · Physics 2024-11-19 Evgenii Ievlev , Michael R. R. Good , Paul C. W. Davies

In recent work by M.H.Lynch, E.Cohen, Y.Hadad and I.Kaminer (LCHK), a modified model of the Unruh-DeWitt quantum detector, coupled to a 4-vector current, has been proposed to examine the radiation emitted by high energy positrons channeled…

General Relativity and Quantum Cosmology · Physics 2024-09-20 Yefim S. Levin

We developed a new technique for measuring the thermodynamic entropy as a function of the magnetic field angle. This technique enables high-resolution angle-resolved measurements of the entropy in an unprecedentedly short measuring time.…

Strongly Correlated Electrons · Physics 2018-06-15 Shunichiro Kittaka , Shota Nakamura , Hiroaki Kadowaki , Hiroshi Takatsu , Toshiro Sakakibara

In analyzing the nature of thermal radiance experienced by an accelerated observer (Unruh effect), an eternal black hole (Hawking effect) and in certain types of cosmological expansion, one of us proposed a unifying viewpoint that these can…

General Relativity and Quantum Cosmology · Physics 2008-11-26 Alpan Raval , B. L. Hu , Don Koks

We show that the heating effect of spontaneous wave-function collapse models implies an experimentally significant increment $\Delta T$ of equilibrium temperature in a mechanical oscillator. The obtained form $\Delta T$ is linear in the…

Quantum Physics · Physics 2015-03-05 Lajos Diósi

We study the axisymmetric, time-dependent hydrodynamics of rotating flows that are under the influence of supermassive black hole gravity and radiation from an accretion disk surrounding the black hole. This work is an extension of the…

Astrophysics · Physics 2009-11-13 Daniel Proga , Jeremiah P. Ostriker , Ryuichi Kurosawa

Weak lensing has become an increasingly important tool in cosmology and the use of galaxy shapes to measure cosmic shear has become routine. The weak-lensing distortion tensor contains two other effects in addition to the two components of…

Cosmology and Nongalactic Astrophysics · Physics 2018-09-19 Daniel B. Thomas , Lee Whittaker , Stefano Camera , Michael L. Brown

We present theoretical models of rotating low mass stars (0.1 - 1.0 \Msun) to demonstrate the effect of rotation on the effective temperature and luminosity of stars. The range of rotation rates in our models corresponds to the observed…

Astrophysics · Physics 2007-05-23 Alison Sills , M. H. Pinsonneault