Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutrino Spectroscopy with Atoms and Molecules   We give a comprehensive account of our proposed experimental method of using
atoms or molecules in order to measure parameters of neutrinos still
undetermined; the absolute mass scale, the mass hierarchy pattern (normal or
inverted), the neutrino mass type (Majorana or Dirac), and the CP violating
phases including Majorana phases. There are advantages of atomic targets, due
to the closeness of available atomic energies to anticipated neutrino masses,
over nuclear target experiments. Disadvantage of using atomic targets, the
smallness of rates, is overcome by the macro-coherent amplification mechanism.
The atomic or molecular process we use is a cooperative deexcitation of a
collective body of atoms in a metastable level |e> emitting a neutrino pair and
a photon; |e> -> |g> + gamma + nu_i nu_j where nu_i's are neutrino mass
eigenstates. The macro-coherence is developed by trigger laser irradiation. We
discuss aspects of the macro-coherence development by setting up the master
equation for the target quantum state and propagating electric field. With a
choice of heavy target atom or molecule such as Xe or I_2 that has a large M1 x
E1 matrix element between |e> and |g>, we show that one can determine three
neutrino masses along with the mass hierarchy pattern by measuring the photon
spectral shape. If one uses a target of available energy of a fraction of 1 eV,
Majorana CP phases may be determined. Our master equation, when applied to E1 x
E1 transition such as pH_2 vibrational transition Xv=1 -> 0, can describe
explosive PSR events in which most of the energy stored in |e> is released
within a few nanoseconds. The present paper is intended to be self-contained
explaining some details related theoretical works in the past, and further
reports new simulations and our ongoing experimental efforts of the project to
realize the neutrino mass spectroscopy using atoms/molecules.

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The categories of this paper are: quant-ph
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The categories of this paper are: stat
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The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
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The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
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The categories of this paper are: math-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: chem-ph
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The categories of this paper are: econ
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The categories of this paper are: solv-int
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The categories of this paper are: alg-geom
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The categories of this paper are: comp-gas
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga