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We investigate the impact of the magnetic field generated by colliding nuclei on heavy quark-antiquark interactions and heavy quark dynamics in the quark-gluon plasma (QGP). By means of hard-thermal-loop resummation technique combined with…

High Energy Physics - Phenomenology · Physics 2024-04-09 He-Xia Zhang , Enke Wang

The direct interaction of the 4-rotational (Lorentzian) gauge field with the angular orbital momentum of an external field is considered. This interaction appears in a new Poincar\'{e} gauge theory of gravitation, in which tetrads are not…

General Relativity and Quantum Cosmology · Physics 2014-11-20 Olga V. Babourova , Boris N. Frolov

It is shown that an unmagnetized nonrelativistic thermal electron-proton plasma spontaneously emits aperiodic turbulent magnetic field fluctuations of strength $|\delta B|=9\beta_eg^{1/3}W_e^{1/2}$ G, where $\beta_e$ is the normalized…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 R. Schlickeiser

The cosmological history and evolution are examined for gravitational models with interaction in the dark sector of the universe. In particular, we consider the dark energy to be described by a phantom scalar field and the dark matter $\rho…

General Relativity and Quantum Cosmology · Physics 2024-12-11 Andronikos Paliathanasis , Amlan Halder , Genly Leon

We propose an empirical model to determine the form of energy loss of charm quarks due to multiple scatterings in quark gluon plasma by demanding a good description of production of D mesons and non-photonic electrons in relativistic…

Nuclear Theory · Physics 2015-06-04 Mohammed Younus , Dinesh K. Srivastava

The elastic scattering between dark matter particles and radiation represents an attractive possibility to solve a number of discrepancies between observations and standard cold dark matter predictions, as the induced collisional damping…

Cosmology and Nongalactic Astrophysics · Physics 2018-06-13 Miguel Escudero , Laura Lopez-Honorez , Olga Mena , Sergio Palomares-Ruiz , Pablo Villanueva-Domingo

The polarized light of the cosmic microwave background is sensitive to new physics that violates parity symmetry. For example, the interaction of photons with the fields of elusive dark matter and dark energy could cause a uniform rotation…

Cosmology and Nongalactic Astrophysics · Physics 2026-04-15 P. Diego-Palazuelos , E. Komatsu

We provide a simple mechanism for reconciling the direct dark matter experimental results. We consider light asymmetric composite dark matter which scatters off nuclei via Higgs and photon exchange. We demonstrate that the interference…

High Energy Physics - Phenomenology · Physics 2011-08-08 Eugenio Del Nobile , Chris Kouvaris , Francesco Sannino

The hidden scalar field, which couples to the visible sector only through Planck-suppressed interactions, is a candidate for dark matter owing to its long lifetime. Decay of such a scalar field offers observational tests of this scenario.…

Cosmology and Nongalactic Astrophysics · Physics 2009-01-23 Fuminobu Takahashi , Eiichiro Komatsu

A new theory makes testable predictions: (1) Higgs fields have an unconventional equation of motion. (2) Fermions have a second-order coupling to gauge fields. (3) Fermion propagators are modified at high energy. (4) There are new scalar…

High Energy Physics - Phenomenology · Physics 2007-05-23 Roland E. Allen

I present a simple scheme for the treatment of gravitational interactions on galactic scales. In analogy to known mechanisms of quantum field theory, I assume ad hoc that gravitation is mediated by virtual exchange particles - gravitons -…

Astrophysics of Galaxies · Physics 2017-01-18 Sascha Trippe

Gravity theory is the basis of modern cosmological models. Thirring-Feynman's tensor field approach to gravitation is an alternative to General Relativity (GR). Though Field Gravity (FG) approach is still developing subject, it opens new…

General Relativity and Quantum Cosmology · Physics 2016-08-31 Yurij Baryshev

We study the possibility of explaining the recently found anomalies in B-meson decays within scenarios with a composite Higgs boson. This class of models provides a natural way to fit the experimental results, interpreting the anomalies as…

High Energy Physics - Phenomenology · Physics 2017-05-31 Eugenio Megias , Giuliano Panico , Oriol Pujolas , Mariano Quiros

Results on high transverse momentum charged particle emission with respect to the reaction plane are presented for Au+Au collisions at $\sqrt{s_{_{NN}}}$= 200 GeV. Two- and four-particle correlations results are presented as well as a…

Nuclear Experiment · Physics 2012-08-27 STAR Collaboration

It has been recently claimed by two different groups that the spectral modulation observed in gamma rays from Galactic pulsars and supernova remnants can be due to conversion of photons into ultra-light axion-like-particles (ALPs) in…

Questioning the experimental basis of continuous descriptions of fundamental interactions we discuss classical gravity as an effective continuous first-order approximation of a discrete interaction. The sub-dominant contributions produce a…

General Relativity and Quantum Cosmology · Physics 2016-08-31 Manoelito M de Souza

Observations of distant supernovae indicate that the Universe is now in a phase of accelerated expansion the physical cause of which is a mystery. Formally, this requires the inclusion of a term acting as a negative pressure in the…

The observation data for artificial celestial body 43096, which had been obtained during 2006-2012 within the framework of international project "The Scientific Network of Optical Instruments for Astrometric and Photometric Observations" -…

Earth and Planetary Astrophysics · Physics 2014-04-18 A. A. Bazyey , N. V. Bazyey , V. I. Kashuba , S. G. Kashuba , V. V. Kouprianov , I. E. Molotov , Z. N. Khutorovsky , L. G Tsybizova

Scalar--tensor theories, with Einstein Hilbert and non-minimal interactions, $\sim M^2R/2 -\alpha\phi^2R/12 $, have graviton exchange induced contact interactions. These always pull the theory back into a formal Einstein frame in which…

High Energy Physics - Theory · Physics 2022-09-16 Christopher T. Hill

If the electroweak Higgs vacuum expectation value $v$ in early universe is $\sim 1 \%$ higher than its present value $v_0=246$ GeV, the $^7$Li puzzle in BBN and the CMB/$\Lambda$CDM tension with late-universe measurements on Hubble…

High Energy Physics - Phenomenology · Physics 2021-09-06 Leo WH Fung , Lingfeng Li , Tao Liu , Hoang Nhan Luu , Yu-Cheng Qiu , S. -H. Henry Tye
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