Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Direct measurements of quantum kinetic energy tensor in stable and
  metastable water near the triple point: an experimental benchmark   This study presents the first direct and quantitative measurements of the
nuclear momentum distribution anisotropy and the quantum kinetic energy tensor
in stable and metastable (supercooled) water near its triple point using Deep
Inelastic Neutron Scattering (DINS). From the experimental spectra accurate
lineshapes of the hydrogen momentum distributions are derived using an
anisotropic Gaussian and a model independent framework. The experimental
results, benchmarked with those obtained for the solid phase, provide the state
of the art directional values of the hydrogen mean kinetic energy in metastable
water. The determinations of the direction kinetic energies in the supercooled
phase, benchmarked with ice at the same temperature, provide accurate and
quantitative measurements of these dynamical observables in metastable and
stable phases, {i.e.} key insight in the physical mechanisms of the hydrogen
quantum state in both disordered and polycrystalline systems. The remarkable
findings of this study establish novel insight to further expand the capacity
and accuracy of DINS investigations of the nuclear quantum effects in water and
represent reference experimental values for theoretical investigations.

8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ