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The atomic bomb American program known as Manhattan Project has been studied in detail. Historians argue that the beginning of this program is rooted in the letter Einstein sent to American President Roosevelt in the summer of 1939. This…

物理学史与哲学 · 物理学 2007-06-08 Diego Hurtado de Mendoza

In this article we present a particular theory of gravity in which Einstein's field equations are modified by promoting Newton's constant $G$ to a covariant differential operator $G_\Lambda(\Box_g)$. The general idea was obviously outlined…

广义相对论与量子宇宙学 · 物理学 2016-07-15 Alain Dirkes

The quest for the origin of matter in the Universe had been the subject of philosophical and theological debates over the history of mankind, but quantitative answers could be found only by the scientific achievements of the last century. A…

天体物理仪器与方法 · 物理学 2014-03-25 R. Reifarth , C. Lederer , F. Käppeler

In the last two decades a number of nuclear structure and astrophysics experiments were performed at heavy-ion storage rings employing unique experimental conditions offered by such machines. Furthermore, building on the experience gained…

The f(T) theory, a generally modified teleparallel gravity, has been proposed as an alternative gravity model to account for the dark energy phenomena. Following our previous work [Xin-he Meng and Ying-bin Wang, EPJC(2011),…

广义相对论与量子宇宙学 · 物理学 2015-06-04 Han Dong , Ying-bin Wang , Xin-he Meng

The origins of ultra-high-energy particles remain one of the most profound mysteries in astrophysics. If nearby transient sources of ultra-high-energy particles exist, we might expect correlated emission of neutrinos and photons, arriving…

高能天体物理现象 · 物理学 2025-07-16 Maxwell Nakos

One of the fundamental questions in the field of subatomic physics is what happens to matter at extreme densities and temperatures as may have existed in the first microseconds after the Big Bang and exists, perhaps, in the core of dense…

核实验 · 物理学 2011-06-16 Raimond Snellings

We explore the possibility that the reported time variation of the fine structure constant $\alpha$ is due to a coupling between electromagnetism and gravitation. This may reconcile the claimed results on $\alpha$ with the upper limit from…

广义相对论与量子宇宙学 · 物理学 2011-05-23 J. P. Mbelek , M. Lachièze-Rey

One of the critical longstanding issues in nuclear physics is the origin of the heavy elements such as platinum and uranium. The r-process hypothesis is generally supported as the process through which heavy elements are formed via…

The fortieth anniversary of the original construction of Supergravity provides an opportunity to combine some reminiscences of its early days with an assessment of its impact on the quest for a quantum theory of gravity.

高能物理 - 理论 · 物理学 2020-04-22 S. Ferrara , A. Sagnotti

We highlight certain key achievements in experimental work on molecular, colloidal and granular glassformers. This short review considers these three classes of experimental systems and focusses largely on the work of the authors and their…

软凝聚态物质 · 物理学 2023-10-16 Olivier Dauchot , François Ladieu , C. Patrick Royall

A several-step theoretical model is constructed to trace the origin of ultra high energy (UHE) $[1-2]$PeV neutrinos detected, recently, by the IceCube collaboration. Protons in the AGN magnetosphere, experiencing different gravitational…

高能天体物理现象 · 物理学 2018-03-14 Z. Osmanov , S. Mahajan , G. Machabeli , N. Chkheidze

The main goal of the Borexino detector, in its final phase of construction in the Gran Sasso underground laboratory, is the direct observation and measurement of the low energy component of neutrinos coming from the Sun. The unique low…

高能物理 - 实验 · 物理学 2007-05-23 Lino Miramonti

High-energy neutrino astrophysics is rapidly developing, and in the last two years, new and exciting results have been obtained. Among them are the confirmation of the existence of the diffuse astrophysical neutrino flux by the new…

高能天体物理现象 · 物理学 2024-05-27 Sergey Troitsky

Highlights from Brookhaven National Laboratory (BNL) and experiments at the BNL Relativistic Heavy Ion Collider (RHIC) are presented for the years 2011--2013. This review is a combination of lectures which discussed the latest results each…

核实验 · 物理学 2014-06-05 M. J. Tannenbaum

We search for a universal property of quantum gravity. By "universal", we mean the independence from any existing model of quantum gravity (such as the super string theory, loop quantum gravity, causal dynamical triangulation, and so on).…

广义相对论与量子宇宙学 · 物理学 2015-06-12 Hiromi Saida

The nature of the fuel that drives today's cosmic acceleration is an open and tantalizing mystery. We entertain the suggestion that the acceleration is not the manifestation of yet another new ingredient in the cosmic gas tank, but rather a…

天体物理学 · 物理学 2008-11-26 Arthur Lue , Roman Scoccimarro , Glenn Starkman

Interstellar travel requires propulsion systems beyond present possibilities and scientists search for new technologies and breakthrough concepts in physics. Frederick E. Alzofon came up with an alternative idea on the origin of the…

综合物理 · 物理学 2024-07-08 Willy Stark , Hans-Joachim Grafe , Martin Tajmar

The mystery of where and how Nature accelerates the cosmic rays is still unresolved a century after their discovery. Gamma ray bursts (GRBs) have been proposed as one of the more plausible sources of extragalactic cosmic rays. A positive…

高能天体物理现象 · 物理学 2019-08-14 A. Kappes

The existence of astrophysical neutrinos with energies of tens of TeV and higher has been reliably established by the IceCube experiment; the first confirmations of this discovery are being obtained with the ANTARES and Baikal-GVD…

高能天体物理现象 · 物理学 2021-12-20 Sergey Troitsky