2 research outputs found
Scaled momentum distributions for K-S(0) and Lambda/(Lambda)over-bar in DIS at HERA
Scaled momentum distributions for the strange hadrons K0s and Lambda/bar
Lambda were measured in deep inelastic ep scattering with the ZEUS detector at
HERA using an integrated luminosity of 330 pb-1. The evolution of these
distributions with the photon virtuality, Q2, was studied in the kinematic
region 10<Q2<40000 GeV2 and 0.001<x<0.75, where x is the Bjorken scaling
variable. Clear scaling violations are observed. Predictions based on different
approaches to fragmentation were compared to the measurements.
Leading-logarithm parton-shower Monte Carlo calculations interfaced to the Lund
string fragmentation model describe the data reasonably well in the whole range
measured. Next-to-leading-order QCD calculations based on fragmentation
functions, FFs, extracted from e+e- data alone, fail to describe the
measurements. The calculations based on FFs extracted from a global analysis
including e+e-, ep and pp data give an improved description. The measurements
presented in this paper have the potential to further constrain the FFs of
quarks, anti-quarks and gluons yielding K0s and Lambda/bar Lambda strange
hadrons.Comment: 34 pages, 8 figure
Damping signatures at JUNO, a medium-baseline reactor neutrino oscillation experiment
Abstract
We study damping signatures at the Jiangmen Underground Neutrino Observatory (JUNO), a medium-baseline reactor neutrino oscillation experiment. These damping signatures are motivated by various new physics models, including quantum decoherence, nu(3) decay, neutrino absorption, and wave packet decoherence. The phenomenological effects of these models can be characterized by exponential damping factors at the probability level. We assess how well JUNO can constrain these damping parameters and how to disentangle these different damping signatures at JUNO. Compared to current experimental limits, JUNO can significantly improve the limits on tau(3)/m(3) in the nu(3) decay model, the width of the neutrino wave packet sigma(x), and the intrinsic relative dispersion of neutrino momentum sigma(rel)