Results 11 to 20 of about 46,838 (50)

Next-to-leading-order QCD matching for ∆F = 2 processes in scalar leptoquark models

open access: yesJournal of High Energy Physics, 2022
Leptoquarks provide viable solutions to the flavour anomalies, i.e. they can explain the tensions between the measurements and the Standard Model predictions of the anomalous magnetic moment of the muon as well as b → sℓ + ℓ − and b → cτν processes ...
Andreas Crivellin   +2 more
doaj   +1 more source

Accelerator-feasible N-body nonlinear integrable system

open access: yesPhysical Review Special Topics. Accelerators and Beams, 2014
Nonlinear N-body integrable Hamiltonian systems, where N is an arbitrary number, have attracted the attention of mathematical physicists for the last several decades, following the discovery of some number of these systems.
V. Danilov, S. Nagaitsev
doaj   +1 more source

Large gauge transformation, soft theorem, and Infrared divergence in inflationary spacetime

open access: yesJournal of High Energy Physics, 2017
It is widely known that the primordial curvature perturbation ζ has several universal properties in the infrared (IR) such as the soft theorem, which is also known as the consistency relation, and the conservation in time.
Takahiro Tanaka, Yuko Urakawa
doaj   +1 more source

Virasoro entanglement Berry phases

open access: yesJournal of High Energy Physics, 2022
We study the parallel transport of modular Hamiltonians encoding entanglement properties of a state. In the case of 2d CFT, we consider a change of state through action with a suitable diffeomorphism on the circle: one that diagonalizes the adjoint ...
Jan de Boer   +5 more
doaj   +1 more source

Observation and simulation of space-charge effects in a radio-frequency photoinjector using a transverse multibeamlet distribution

open access: yesPhysical Review Special Topics. Accelerators and Beams, 2009
We report on an experimental study of space-charge effects in a radio-frequency (rf) photoinjector. A 5 MeV electron bunch, consisting of a number of beamlets separated transversely, was generated in an rf photocathode gun and propagated in the ...
M. Rihaoui   +4 more
doaj   +1 more source

Strong cosmic censorship for the massless Dirac field in the Reissner-Nordstrom-de Sitter spacetime

open access: yesJournal of High Energy Physics, 2019
We present the Fermi story of strong cosmic censorship in the near-extremal Reissner-Nordstrom-de Sitter black hole. To this end, we first derive from scratch the criterion for the quasi-normal modes of Dirac field to violate strong cosmic censorship in ...
Boxuan Ge   +4 more
doaj   +1 more source

One-loop same helicity YM amplitudes from BG currents

open access: yesJournal of High Energy Physics, 2022
We propose and prove a new formula for the one-loop all same helicity Yang-Mills amplitudes. These amplitudes are seen to arise as a sum of products of two tree-level Berends-Giele currents connected by an effective propagator.
Pratik Chattopadhyay, Kirill Krasnov
doaj   +1 more source

Determination of deuteron beam polarizations at COSY

open access: yesPhysical Review Special Topics. Accelerators and Beams, 2006
The vector (P_{z}) and tensor (P_{zz}) polarizations of a deuteron beam have been measured using elastic deuteron–carbon scattering at 75.6 MeV and deuteron-proton scattering at 270 MeV.
D. Chiladze   +47 more
doaj   +1 more source

Maximally N $$ \mathcal{N} $$ -extended super-BMS3 algebras and generalized 3D gravity solutions

open access: yesJournal of High Energy Physics, 2019
We consider the maximal N $$ \mathcal{N} $$ -extended supergravity theory in 3 dimensions with fermionic generators transforming under real but non necessarily irreducible representations of the internal algebra.
Nabamita Banerjee   +3 more
doaj   +1 more source

Color-octet contributions for J/ψ inclusive production at B factories in soft gluon factorization

open access: yesJournal of High Energy Physics, 2022
We have studied color-octet contributions for J/ψ inclusive production at B factories, i.e., e + e − → J/ψ(3 P J 8 $$ {P}_J^{\left[8\right]} $$ , 1 S 0 8 $$ {S}_0^{\left[8\right]} $$ ) + X non − c c ¯ $$ {X}_{\mathrm{non}-c\overline{c}} $$ , using the ...
An-Ping Chen   +3 more
doaj   +1 more source

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