Results 61 to 70 of about 2,554 (118)

Impact of beam–beam effects on absolute luminosity calibrations at the CERN Large Hadron Collider

European Physical Journal C: Particles and Fields
At the Large Hadron Collider (LHC), absolute luminosity calibrations obtained by the van der Meer (vdM) method are affected by the mutual electromagnetic interaction of the two beams.
A. Babaev, T. Barklow, O. Karacheban, W. Kozanecki, I. Kralik, A. Mehta, G. Pasztor, T. Pieloni, D. Stickland, C. Tambasco, R. Tomas, J. Wańczyk   +11 more
doaj   +1 more source

PeV-scale dark matter as a thermal relic of a decoupled sector

Physics Letters B, 2016
In this letter, we consider a class of scenarios in which the dark matter is part of a heavy hidden sector that is thermally decoupled from the Standard Model in the early universe.
Asher Berlin, Dan Hooper, Gordan Krnjaic
doaj   +1 more source

Search for a leptophobic doubly charged Higgs in same-sign four-lepton and six-lepton signatures in a left-right symmetric model

European Physical Journal C: Particles and Fields
We investigate the possibility of multi-lepton (four and six) signatures, including an exotic signature of same-sign four-lepton (SS4L) as signals of pair production of a doubly charged Higgs in the minimal left-right symmetric model, extended with two ...
Tathagata Ghosh, Rafiqul Rahaman, Santosh Kumar Rai   +2 more
doaj   +1 more source

Particle acceleration in astrophysical sources [PDF]

Proceedings of Frontiers of Fundamental Physics 14 — PoS(FFP14), 2016
Astrophysical sources are extremely efficient accelerators. Some sources emit photons up to multi-TeV energies, a signature of the presence, within them, of particles with energies much higher than those achievable with the largest accelerators on Earth.
openaire   +3 more sources

Fatjet signatures of heavy neutrinos and heavy leptons in a left-right model with universal seesaw at the HL-LHC

European Physical Journal C: Particles and Fields
We perform a collider search for fatjet signals originating from boosted heavy neutral and charged leptons with masses between a few hundred GeV to a TeV.
Atri Dey, Rafiqul Rahaman, Santosh Kumar Rai   +2 more
doaj   +1 more source

Lumped Parameter Model for Structural Analysis of Over-Constrained Multi-Legged Parallel Mechanism Supporting System Applied to Cryogenic Devices

Machines
While the design of a cryostat is being developed, one of the most relevant sub-systems is the internal supporting system that sustains the cooled component.
Luca Piacentini, Luca Dassa, Diego Perini, Andris Ratkus, Toms Torims, Stefano Uberti   +5 more
doaj   +1 more source

LHC@Home: a BOINC-based volunteer computing infrastructure for physics studies at CERN

Open Engineering, 2017
The LHC@Home BOINC project has provided computing capacity for numerical simulations to researchers at CERN since 2004, and has since 2011 been expanded with a wider range of applications. The traditional CERN accelerator physics simulation code SixTrack
Barranco Javier, Cai Yunhai, Cameron David, Crouch Matthew, Maria Riccardo De, Field Laurence, Giovannozzi Massimo, Hermes Pascal, Høimyr Nils, Kaltchev Dobrin, Karastathis Nikos, Luzzi Cinzia, Maclean Ewen, McIntosh Eric, Mereghetti Alessio, Molson James, Nosochkov Yuri, Pieloni Tatiana, Reid Ivan D., Rivkin Lenny, Segal Ben, Sjobak Kyrre, Skands Peter, Tambasco Claudia, Veken Frederik Van der, Zacharov Igor   +25 more
doaj   +1 more source

ACCELERATION OF PARTICLES BY QUASIBLACK HOLES [PDF]

International Journal of Modern Physics D, 2013
If two particles collide near the black hole horizon, the energy in their center of mass (CM) frame can grow indefinitely (the so-called Bañados, Silk and West (BSW) effect). This requires fine-tuning the parameters (the energy–momentum, angular momentum or electric charge) of one particle. We show that the CM energy can be unbound also for collisions
openaire   +4 more sources

Particle Acceleration in Solar Flares [PDF]

International Astronomical Union Colloquium, 1989
AbstractParticle acceleration during solar flares is a complex process where the main ‘actors’ (Direct (D.C.) or turbulent electric fields) are hidden from us. It is easy to construct a successful particle accelertion model if we are allowed to impose on the flaring region arbitrary conditions (e.g., strength and scale length of the D.C.
openaire   +3 more sources

Investigation of (n,x) reactions on enriched Ge targets at 15.7 MeV at the upgraded facility of NCSR “Demokritos” [PDF]

EPJ Web of Conferences
Neutron induced reaction cross-section measurements display special interest both for fundamental research in the Nuclear Physics field and many practical applications.
Chasapoglou S., Vlastou R., Diakaki M., Kokkoris M., Amanatidis L., Axiotis M., Harissopoulos S., Lagoyannis A.   +7 more
doaj   +1 more source