Results 1 to 10 of about 116,136 (159)

Inferring effective field observables from a discrete model [PDF]

New Journal of Physics, 2017
A spin system on a lattice can usually be modeled at large scales by an effective quantum field theory. A key mathematical result relating the two descriptions is the quantum central limit theorem, which shows that certain spin observables satisfy an ...
Cédric Bény
doaj   +4 more sources

Local spin alignment of vector mesons in relativistic heavy-ion collisions

Physics Letters B, 2021
We investigate the spin alignment of vector mesons arising from locally polarized quarks and anti-quarks (local spin alignment) in heavy-ion collisions.
Xiao-Liang Xia, Hui Li, Xu-Guang Huang, Huan Zhong Huang   +3 more
doaj   +1 more source

Squeezing of nonlinear spin observables by one axis twisting in the presence of decoherence: An analytical study

Comptes Rendus. Physique, 2022
In an ensemble of two-level atoms that can be described in terms of a collective spin, entangled states can be used to enhance the sensitivity of interferometric precision measurements.
Baamara, Youcef, Sinatra, Alice, Gessner, Manuel   +2 more
doaj   +1 more source

Spin Entropy

Entropy, 2022
Two types of randomness are associated with a mixed quantum state: the uncertainty in the probability coefficients of the constituent pure states and the uncertainty in the value of each observable captured by the Born’s rule probabilities.
Davi Geiger, Zvi M. Kedem
doaj   +1 more source

Classical observables from coherent-spin amplitudes

Journal of High Energy Physics, 2021
The quantum field-theoretic approach to classical observables due to Kosower, Maybee and O’Connell provides a rigorous pathway from on-shell scattering amplitudes to classical perturbation theory.
Rafael Aoude, Alexander Ochirov
doaj   +1 more source

Probing new physics through entanglement in diboson production

Journal of High Energy Physics, 2023
Pair production of heavy vector bosons is a key process at colliders: it allows to test our understanding of the Standard Model and to explore the existence of new physics through precision measurements of production rates and differential distributions.
Rafael Aoude, Eric Madge, Fabio Maltoni, Luca Mantani   +3 more
doaj   +1 more source

Spin correlations in final-state parton showers and jet observables

European Physical Journal C: Particles and Fields, 2021
As part of a programme to develop parton showers with controlled logarithmic accuracy, we consider the question of collinear spin correlations within the PanScales family of parton showers.
Alexander Karlberg, Gavin P. Salam, Ludovic Scyboz, Rob Verheyen   +3 more
doaj   +1 more source

Quantum entanglement and top spin correlations in SMEFT at higher orders

Journal of High Energy Physics, 2023
We present the first analysis of top spin polarizations, t t ¯ $$ t\overline{t} $$ spin correlations, and t t ¯ $$ t\overline{t} $$ spin entanglement at the LHC in the context of the Standard Model Effective Field Theory, that goes beyond Leading Order ...
Claudio Severi, Eleni Vryonidou
doaj   +1 more source

Angular distribution of Λ b 0 → p K − ℓ + ℓ − $$ {\Lambda}_b^0\to p{K}^{-}{\ell}^{+}{\ell}^{-} $$ decays comprising Λ resonances with spin ≤ 5/2

Journal of High Energy Physics, 2023
This paper describes the angular distribution of Λ b 0 → Λ → p K − ℓ + ℓ − $$ {\Lambda}_b^0\to \Lambda \left(\to p{K}^{-}\right){\ell}^{+}{\ell}^{-} $$ decays. A full expression is given for the case of multiple interfering spin-states with spin ≤ 5 2 $$
A. Beck, T. Blake, M. Kreps
doaj   +1 more source

Spin Observables for Polarizing Antiprotons [PDF]

, 2007
The PAX project at GSI Darmstadt plans to polarize an antiproton beam by repeated interaction with a hydrogen target in a storage ring. Many of the beam particles are required to remain within the ring after interaction with the target, so small ...
Buttimore, N. H., O'Brien, D. S.
core   +3 more sources