Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: How Devious are Deviations From Quantum Mechanics: The Case of the B^0
  \bar B^0 System   Considering semileptonic decays of the entangled B^0 \bar B^0 state which is
generated in the decay of Upsilon(4S), we simply multiply the
quantum-mechanical interference term by a factor (1-\zeta) and use the
``decoherence parameter'' \zeta as a measure for deviations from quantum
mechanics. We investigate several consequences of this modification of
semileptonic B^0 \bar B^0 decays. In particular, we show that when confronted
with the experimental values of the ratio R=(# like-sign dilepton events)/(#
opposite-sign dilepton events) and of the B_H--B_L mass difference, the ensuing
one standard deviation range of the decoherence parameter depends strongly on
the basis in the B^0--\bar B^0 space used to build the entangled B^0 \bar B^0
state. On the other hand, in quantum mechanics physical quantities are, of
course, independent of such arbitrary basis choices.

30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th