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Showing 20 of 962 academic articles

B¯→Xsγ with a warped bulk Higgs

P. Moch, J. Rohrwild • Nuclear Physics B (2016)

We study the decay B¯→Xsγ in Randall–Sundrum models with an IR-localised bulk Higgs. The two models under consideration are a minimal model and a model with a custodial protection mechanism. We include the effects of tree- and one-loop diag...

DOAJ Open Access (DOAJ) DOI: 10.1016/j.nuclphysb.2015.11.014

Ergosphere and shadow of a rotating regular black hole

Sushant G. Ghosh, Muhammed Amir, Sunil D. Maharaj • Nuclear Physics B (2020)

The spacetime singularities in classical general relativity predicted by the celebrated singularity theorems are formed at the end of gravitational collapse. Quantum gravity is the expected theory to resolve the singularity problem but we a...

DOAJ Open Access (DOAJ) DOI: 10.1016/j.nuclphysb.2020.115088

Curvature and thermal corrections in tree-level CPT-Violating Leptogenesis

Nick E. Mavromatos, Sarben Sarkar • European Physical Journal C: Particles and Fields (2020)

Abstract In a model for leptogenesis based on spontaneous breaking of Lorentz and $$\mathcal {CPT}$$ CPT symmetry [1–3], we examine the consistency of using the approximation of plane-wave solutions for a free spin-$$\frac{1}{2}$$ 12 Dirac ...

DOAJ Open Access (DOAJ) DOI: 10.1140/epjc/s10052-020-8109-1

Analytic NNLO QCD corrections to top quark pair production in electron-positron collisions

Long-Bin Chen, Jian Wang, Yefan Wang • Journal of High Energy Physics (2024)

Abstract We present the analytic total cross section of top quark pair production in electron-positron annihilation at next-to-next-to-leading order (NNLO) in Quantum Chromodynamics (QCD). By utilizing the optical theorem, the NNLO correcti...

DOAJ Open Access (DOAJ) DOI: 10.1007/JHEP09(2024)014

Slow Solar Wind Connection Science during Solar Orbiter’s First Close Perihelion Passage

Stephanie L. Yardley, Christopher J. Owen, David M. Long, Deborah Baker et al. • The Astrophysical Journal Supplement Series (2023)

The Slow Solar Wind Connection Solar Orbiter Observing Plan (Slow Wind SOOP) was developed to utilize the extensive suite of remote-sensing and in situ instruments on board the ESA/NASA Solar Orbiter mission to answer significant outstandin...

DOAJ Open Access (DOAJ) DOI: 10.3847/1538-4365/acd24b

Multi-jet merged top-pair production including electroweak corrections

Christian Gütschow, Jonas M. Lindert, Marek Schönherr • European Physical Journal C: Particles and Fields (2018)

Abstract We present theoretical predictions for the production of top-quark pairs in association with jets at the LHC including electroweak (EW) corrections. First, we present and compare differential predictions at the fixed-order level fo...

DOAJ Open Access (DOAJ) DOI: 10.1140/epjc/s10052-018-5804-2

Investigation of dipole emission near a dielectric metasurface using a dual-tip scanning near-field optical microscope

Abbasirad Najmeh, Barreda Angela, Arslan Dennis, Steinert Michael et al. • Nanophotonics (2021)

A wide variety of near-field optical phenomena are described by the interaction of dipole radiation with a nanophotonic system. The electromagnetic field due to the dipole excitation is associated with the Green’s function. It is of great i...

DOAJ Open Access (DOAJ) DOI: 10.1515/nanoph-2021-0429

Perturbative spacetimes from Yang-Mills theory

Andrés Luna, Ricardo Monteiro, Isobel Nicholson, Alexander Ochirov et al. • Journal of High Energy Physics (2017)

Abstract The double copy relates scattering amplitudes in gauge and gravity theories. In this paper, we expand the scope of the double copy to construct spacetime metrics through a systematic perturbative expansion. The perturbative procedu...

DOAJ Open Access (DOAJ) DOI: 10.1007/JHEP04(2017)069

Mechanism for rapid growth of organic–inorganic halide perovskite crystals

Pabitra K. Nayak, David T. Moore, Bernard Wenger, Simantini Nayak et al. • Nature Communications (2016)

Single crystals of lead halide perovskites exhibit good optoelectronic properties. Here, the authors study and deduce the mechanism for crystallisation and show how controlling dissolution of colloids through varying the acidity and tempera...

DOAJ Open Access (DOAJ) DOI: 10.1038/ncomms13303

Comparison between GEANT4 and MCNP for well logging applications

Varignier Geoffrey, Fondement Valentin, Carasco Cédric, Collot Johann et al. • EPJ Web of Conferences (2023)

MCNP and GEANT4 are two reference Monte Carlo nuclear simulators, MCNP being the standard in the Oil & Gas nuclear logging industry. While performing a simulation benchmark of these two software for the purpose of “Cased Hole” wellbore eval...

DOAJ Open Access (DOAJ) DOI: 10.1051/epjconf/202328801002

Dynamics and resilience of the unconventional charge density wave in ScV6Sn6 bilayer kagome metal

Manuel Tuniz, Armando Consiglio, Denny Puntel, Chiara Bigi et al. • Communications Materials (2023)

Abstract Long-range electronic ordering descending from a metallic parent state constitutes a rich playground to study the interplay of structural and electronic degrees of freedom. In this framework, kagome metals are in the most interesti...

DOAJ Open Access (DOAJ) DOI: 10.1038/s43246-023-00430-y

Baryogenesis and first-order QCD transition with gravitational waves from a large lepton asymmetry

Fei Gao, Julia Harz, Chandan Hati, Yi Lu et al. • Journal of High Energy Physics (2025)

Abstract A large primordial lepton asymmetry can lead to successful baryogenesis by preventing the restoration of electroweak symmetry at high temperatures, thereby suppressing the sphaleron rate. This asymmetry can also lead to a first-ord...

DOAJ Open Access (DOAJ) DOI: 10.1007/JHEP06(2025)247

Enhanced conformal BMS3 symmetries

Oscar Fuentealba, Iva Lovrekovic, David Tempo, Ricardo Troncoso • Journal of High Energy Physics (2025)

Abstract An enhanced version of the conformal BMS3 algebra is presented. It is shown to emerge from the asymptotic structure of an extension of conformal gravity in 3D by Pope and Townsend that consistently accommodates an additional spin-2...

DOAJ Open Access (DOAJ) DOI: 10.1007/JHEP04(2025)054