Iodine molecule for neutrino mass spectroscopy: Ab initio calculation of spectral rate

Motomichi Tashiro, Masahiro Ehara, Susumu Kuma, Yuki Miyamoto, Noboru Sasao, Satoshi Uetake, Motohiko Yoshimura

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

It has recently been argued that atoms and molecules may become good targets for determining neutrino parameters still undetermined, if the atomic/molecular process is enhanced by a new kind of coherence.We compute the photon energy spectrum rate arising from coherent radiative neutrino pair emission processes of metastable excited states of I2 and its isovalent molecules, |Av} → |Xv '} + γ + νiνj and |A' v} → |Xv '} + γ + νiνj , with γ an IR photon and νi ( j ) the i ( j )th neutrino mass eigenstates, and show how fundamental neutrino parameters may be determined. Energies of electronically excited states of I2, including the effect of spin-orbit couplings, were calculated by the multiconfigurational second-order perturbation (CASPT2) method. Summation over many vibrational levels of intermediate states is fully incorporated. Unlike atomic candidates with a much larger energy difference, such as Xe, I2 transitions from a vibrational level A(v = 0) to X(v' = 24) give us an opportunity to determine the mass type (Majorana vs Dirac distinction) and theMajorana CPV (charge-conjugation parity violating) phases, although the rate is much smaller.

Original languageEnglish
Article numberptt118
JournalProgress of Theoretical and Experimental Physics
Volume2013
Issue number11
DOIs
Publication statusPublished - Nov 2013

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iodine
mass spectroscopy
neutrinos
molecules
photons
conjugation
excitation
parity
eigenvectors
energy spectra
orbits
perturbation
energy
atoms

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Iodine molecule for neutrino mass spectroscopy : Ab initio calculation of spectral rate. / Tashiro, Motomichi; Ehara, Masahiro; Kuma, Susumu; Miyamoto, Yuki; Sasao, Noboru; Uetake, Satoshi; Yoshimura, Motohiko.

In: Progress of Theoretical and Experimental Physics, Vol. 2013, No. 11, ptt118, 11.2013.

Research output: Contribution to journalArticle

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