EPJ C Highlight - Removing complexity layers from the universe’s creation
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- Published on 23 July 2013
Understanding complexity in the early universe may require combining simpler models to interpret cosmological observations
Complicated statistical behaviour observed in complex systems such as early universe can often be understood if it is broken down into simpler ones. Two physicists, Petr Jizba (currently affiliated with the Czech Technical University in Prague), and Fabio Scardigli (now working at Kyoto University in Japan), have just published results in EPJ C pertaining to theoretical predictions of such cosmological systems’ dynamics.
EPJ C Highlight - Curvature Oscillations in Modified Gravity Theories as Possible Source of Ultra-High-Energy Cosmic Rays
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- Published on 07 December 2012
The origin of ultra-high-energy cosmic rays, with energies around the GZK cutoff, remains an unsolved mystery. In the present letter a novel and intriguing explanation is suggested that links far-reaching fundamental aspects of F(R) modified theories to an efficient production of highly energetic cosmic rays during the recent history of the Universe.
At the core of this work lies the proof that in cosmological and astrophysical systems with rising energy densities, the F(R) modified theories of gravity exhibit powerful oscillations of the curvature scalar R, with an amplitude much larger than the standard value of curvature predicted by the General Relativity. These oscillations are strongly anharmonic, with frequencies that can be as large as billions of GeV. This striking and rather unexpected oscillatory behavior of R lends support to the idea that ultra-high energy cosmic rays can be generated by such curvature oscillations at the appropriate cosmological redshifts.
Curvature oscillations in modified gravity and high energy cosmic rays. E.V. Arbuzova, A.D. Dolgov, L. Reverberi (2012), European Physical Journal C 72:2247, DOI 10.1140/epjc/s10052-012-2247-z
EPJ C - Neutrons escaping to a parallel world?
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- Published on 10 August 2012
An anomaly in the behaviour of ordinary particles may point to the existence of mirror particles that could be candidates for dark matter responsible for the missing mass of the universe. In a paper recently published in EPJC, researchers hypothesised the existence of mirror particles to explain the anomalous loss of neutrons observed experimentally. The existence of such mirror matter had been suggested in various scientific contexts some time ago, including the search for suitable dark matter candidates.
EPJ C - "Spooky action at distance" in particle physics?!
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- Published on 10 August 2012
Physicists have developed the first conclusive test to better understand high-energy particles correlations.
Researchers have devised a proposal for the first conclusive experimental test of a phenomenon known as "Bell’s nonlocality". This test is designed to reveal correlations that are stronger than any classical correlations, and do so between high-energy particles that do not consist of ordinary matter and light. These results are relevant to the so-called "CP violation" principle, which is used to explain the dominance of matter over antimatter. These findings by Beatrix Hiesmayr, a theoretical physicist at the University of Vienna, and her colleagues, a team of quantum information theory specialists, particle physicists and nuclear physicists, have been published in EPJC.
EPJ C - New Theory Editors-in-Chief and Fermi Prize for Dieter Haidt
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- Published on 10 August 2012
The publishers of The European Physical Journal C – Particles and Fields are pleased to announce the appointment of Professors Gino Isidori (Frascati) and Sergei Odintsov (Barcelona) as new theory Editors-in-Chief. This follows the splitting of the theory section into Theory I: Phenomenology of the Standard Model and Beyond, now led by Gino Isidori, and Theory II: Gravitation, Astroparticle Physics and Cosmology, General Aspects of Quantum Field Theories and Alternatives, now led by Sergei Odintsov.
EPJ C - No sign of supersymmetry
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- Published on 10 August 2012
Most stringent limits ever set by ATLAS
"Supersymmetry - to be or not to be?" remains a still unanswered question - it is a traditionally difficult business to demonstrate a zero result in experimental physics - yet the ATLAS collaboration has just set new and very stringent limitations on the "viability space" of a class of new physics models incorporating gauge-mediated supersymmetry breaking.
EPJ C article selected Fast Breaking Paper by ScienceWatch
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- Published on 28 June 2010
The physics paper with the highest percentage increase in citations so far in 2010, as determined by ScienceWatch.com, is `Parton distributions for the LHC' by A Martin et al. Eur.Phys.J.C63:189-285, 2009 This article has meanwhile been cited over 200 times, according to the reference database for high-energy physics, SPIRES. The paper was already selected as highlighted article by the editorial board of EPJ C, featuring on the cover of the September 2009 issue of this journal.
Sources:
ScienceWatch: http:/sciencewatch.com/dr/fbp/2010/10junfbp/
IPPP Durham http:/www.ippp.dur.ac.uk/modules/news/news_0024.html?uri=/News/index.html
SPIRES: http:/www.slac.stanford.edu/spires/find/hep/www?irn=8100632
First proton–proton collisions at the LHC as observed with the ALICE detector
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- Published on 14 December 2009
On 23rd November 2009, during the early commissioning of the CERN Large Hadron Collider (LHC), two counter-rotating proton bunches were circulated for the first time concurrently in the machine, at the LHC injection energy of 450 GeV per beam, allowing all LHC experiments to report first collision candidates.
284 such candidates were recorded by the ALICE experiment, allowing the events to be immediately reconstructed and analyzed. The results obtained by measuring the spatial distribution (specifically, the pseudorapidity density) of charged primary particles in the central region, were found to be consistent with previous measurements in proton-antiproton interactions at the same centre-of-mass energy at the CERN SppS collider (UA5 Collaboration, G.J. Alner et al., Z Phys. C 33 (1986), DOI 10.1007/BF01410446).
To read this paper click here
J Schukraft, the ALICE spokesman, said: This important benchmark test illustrates also the excellent functioning and rapid progress of the LHC accelerator, and of both the hardware and software of the ALICE experiment, in this early start-up phase.
The paper is published open access on SpringerLink.com and distributed under the Creative Commons Attribution Noncommercial License.
To read the full paper click here
EPJ C further extends OA publishing scheme
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- Published on 06 October 2008
Following the completion of the first period (2007-2008) of its OA publishing scheme, and in anticipation of successful negotiations with interested Open Access funding agencies in the future, the "open access" publishing fees for all experimental papers submitted to and accepted for publication by The European Physical Journal C - Particles and Fields will continue to be waived. The paper categories concerned are both regular articles and scientific notes, on experimental physics. Independently, all Letters continue to be published "open access" by default, without any fees being incurred by the authors.
EPJ C appoints new theory Editor-in-Chief
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- Published on 01 September 2008
Prof. Georg Weiglein (University of Durham, UK) has been appointed the new Editor-in-Chief for theoretical particle and high-energy physics of The European Physical Journal (EPJ) C. He leads the journal into the hot phase of LHC physics and works together with Prof. Siegfried Bethke (MPI Munich, Germany), Editor-in-Chief for experimental physics. Georg Weiglein succeeds Jochen Bartels (University of Hamburg, Germany), who had been the journal's theory Editor-in-Chief since 1999. Jochen Bartels and Dieter Haidt (DESY, Hamburg) together successfully shaped the profile of EPJC, after the merger of the famous journals Zeitschrift für Physik C and Il Nuovo Cimento A, back in 1998.
