Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of piN->pipiN processes on polarized targets: Quantum environment
  and its dephasing interaction with particle scattering   Unitary evolution law describes isolated particle scattering processes in an
empty Minkowski spacetime. We put forward a hypothesis that the physical
Universe includes a quantum environment that interacts with particle scattering
processes. While the scattering process is governed by the S-matrix the
interaction evolves the produced state rho_f(S) to observed state rho_f(O). To
be consistent with the Standard Model this new interaction must be a pure
dephasing interaction governed by a non-unitary evolution law modifying the
phases of the amplitudes. We present the first test of the unitary evolution
law in particle scattering. The unitary evolution law evolves pure initial
states into pure final states in exclusive processes. This fact leads to 9
independent constraints on 16 components of angular intensities in piN->pipiN
processes. When expressed in terms of P-parity conserving transversity
amplitudes all 9 constraints are identities provided a single constrain on the
transversity amplitudes holds true. The constraint implies that the relative
phases between transverity amplitudes of the same naturality and transversity
must be 0 or +/- pi. All previous amplitude analyses of the piN->pipiN
processes found non-unitary relative phases in an apparent violation of the
unitary evolution law. The contrast between the predicted and the observed
relative phases presents an unambigous evidence for the existence of the
quantum environment and its pure dephasing interaction with particle scattering
processes.

17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ