Results 41 to 50 of about 2,554 (118)

LHC signals of triplet scalars as dark matter portal: cut-based approach and improvement with gradient boosting and neural networks

Journal of High Energy Physics, 2020
We consider a scenario where an SU(2) triplet scalar acts as the portal for a scalar dark matter particle. We identify regions of the parameter space, where such a triplet coexists with the usual Higgs doublet consistently with all theoretical as well as
Atri Dey, Jayita Lahiri, Biswarup Mukhopadhyaya   +2 more
doaj   +1 more source

Laser Particle Acceleration

Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, 2009
The production of highly energetic beams of both electrons and ions is a major part of the experimental programme at the Central Laser Facility (CLF), STFC Rutherford Appleton Laboratory. Every year sees a significant number of experiments done in both areas. This has been complemented by theoretical studies that have been carried out at the CLF and UK
Norreys, P, Robinson, A, Trines, R
openaire   +3 more sources

Implementing NLO DGLAP evolution in parton showers

Journal of High Energy Physics, 2017
We present a parton shower which implements the DGLAP evolution of parton densities and fragmentation functions at next-to-leading order precision up to effects stemming from local four-momentum conservation.
Stefan Höche, Frank Krauss, Stefan Prestel   +2 more
doaj   +1 more source

Multi-Reflection Time-of-Flight Mass Spectroscopy for Superheavy Nuclides

Atoms, 2023
The atomic masses of isotopes of elements beyond fermium, which can presently only be produced online via fusion-evaporation reactions, have until recently been determined only from α decay chains reaching nuclides with known atomic masses. Especially in
Peter Schury, Yuta Ito, Toshitaka Niwase, Michiharu Wada   +3 more
doaj   +1 more source

New constraint on dark photon at T2K off-axis near detector

Journal of High Energy Physics, 2023
The T2K experiment is one of the most powerful long-baseline experiments to investigate neutrino oscillations. The off-axis near detector called ND280 is installed 280 m downstream from the neutrino production target to measure the neutrino energy ...
Takeshi Araki, Kento Asai, Tomoya Iizawa, Hidetoshi Otono, Takashi Shimomura, Yosuke Takubo   +5 more
doaj   +1 more source

Preconditioned flow as a solution to the hierarchical growth problem in the generalized Lefschetz thimble method

Journal of High Energy Physics
The generalized Lefschetz thimble method is a promising approach that attempts to solve the sign problem in Monte Carlo methods by deforming the integration contour using the flow equation.
Jun Nishimura, Katsuta Sakai, Atis Yosprakob   +2 more
doaj   +1 more source

Development of High-Granularity Dual-Readout Calorimetry with psec Timing [PDF]

EPJ Web of Conferences
Dual-readout and particle flow algorithm (PFA) are technologies proposed for precise jet energy measurement in future colliders. While PFA requires highly granular calorimeters, dual-readout has mainly been used with fiber-based calorimeters that do not ...
Kamiyama Taiki, Freeman James, Gatto Corrado, Jeans Daniel, Li Weiyuan, Matsuoka Kodai, Ogawa Hiroyasu, Ootani Wataru, Suehara Taikan, Takeshita Tohru   +9 more
doaj   +1 more source

Axion dark matter detection by superconducting resonant frequency conversion

Journal of High Energy Physics, 2020
We propose an approach to search for axion dark matter with a specially designed superconducting radio frequency cavity, targeting axions with masses m a ≲ 10 −6 eV. Our approach exploits axion-induced transitions between nearly degenerate resonant modes
Asher Berlin, Raffaele Tito D’Agnolo, Sebastian A. R. Ellis, Christopher Nantista, Jeffrey Neilson, Philip Schuster, Sami Tantawi, Natalia Toro, Kevin Zhou   +8 more
doaj   +1 more source

Dark Matter and Collider Searches in $$S_3$$ S 3 -Symmetric 2HDM with Vector Like Lepton

European Physical Journal C: Particles and Fields, 2021
We study the $$S_3$$ S 3 -symmetric two Higgs doublet model by adding two generations of vector like leptons (VLL) which are odd under a discrete $$Z_2$$ Z 2 -symmetry. The lightest neutral component of the VLL acts as a dark matter (DM) whereas the full
Indrani Chakraborty, Dilip Kumar Ghosh, Nivedita Ghosh, Santosh Kumar Rai   +3 more
doaj   +1 more source

Particle Acceleration in the Heliosphere [PDF]

Highlights of Astronomy, 1995
The heliosphere could be divided in three major acceleration Laboratories, the solar surface (Laboratory 1), the interplanetary medium (Laboratory 2) and Earth and Planetary magnetospheres (Laboratory 3). Our understanding of the acceleration process depends strongly on the nature of the drivers and the energy dissipation process.
openaire   +1 more source