8 research outputs found
Monopole characteristics in various Abelian gauges
Renormalization group (RG) smoothing is employed on the lattice to
investigate and to compare the monopole structure of the SU(2) vacuum as seen
in different gauges (maximally Abelian (MAG), Polyakov loop (PG) and Laplacian
gauge (LG)). Physically relevant types of monopoles (LG and MAG) are
distinguished by their behavior near the deconfining phase transition. For the
LG, Abelian projection reproduces well the gauge independent monopole structure
encoded in an auxiliary Higgs field. Density and localization properties of
monopoles, their non-Abelian action and topological charge are studied. Results
are presented confirming the Abelian dominance with respect to the
non-perturbative static potential for all gauges considered.Comment: 36 pages, 12 figure
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The nylon balloon for xenon loaded liquid scintillator in KamLAND-Zen 800 neutrinoless double-beta decay search experiment
The KamLAND-Zen 800 experiment is searching for the neutrinoless double-beta
decay of Xe by using Xe-loaded liquid scintillator. The liquid
scintillator is enclosed inside a balloon made of thin, transparent,
low-radioactivity film that we call Inner Balloon (IB). The IB, apart from
guaranteeing the liquid containment, also allows to minimize the background
from cosmogenic muon-spallation products and B solar neutrinos. Indeed
these events could contribute to the total counts in the region of interest
around the Q-value of the double-beta decay of Xe. In this paper, we
present an overview of the IB and describe the various steps of its
commissioning minimizing the radioactive contaminations, from the material
selection, to the fabrication of the balloon and its installation inside the
KamLAND detector. Finally, we show the impact of the IB on the KamLAND
background as measured by the KamLAND detector itself
The nylon balloon for xenon loaded liquid scintillator in KamLAND-Zen 800 neutrinoless double-beta decay search experiment
The KamLAND-Zen 800 experiment is searching for the neutrinoless double-beta
decay of Xe by using Xe-loaded liquid scintillator. The liquid
scintillator is enclosed inside a balloon made of thin, transparent,
low-radioactivity film that we call Inner Balloon (IB). The IB, apart from
guaranteeing the liquid containment, also allows to minimize the background
from cosmogenic muon-spallation products and B solar neutrinos. Indeed
these events could contribute to the total counts in the region of interest
around the Q-value of the double-beta decay of Xe. In this paper, we
present an overview of the IB and describe the various steps of its
commissioning minimizing the radioactive contaminations, from the material
selection, to the fabrication of the balloon and its installation inside the
KamLAND detector. Finally, we show the impact of the IB on the KamLAND
background as measured by the KamLAND detector itself