Light-Neutrino Exchange and Long-Distance Contributions to 0 ν 2 β Decays: An Exploratory Study on π π → e e

Feng, Xu; Jin, Lu-Chang; Tuo, Xin-Yu; Xia, Shi-Cheng

doi:10.1103/PhysRevLett.122.022001

Title: Light-Neutrino Exchange and Long-Distance Contributions to $0 ν 2 β$ Decays: An Exploratory Study on $π π \to e e$

Abstract

In this article we present an exploratory lattice QCD calculation of the neutrinoless double beta decay $$\pi\pi\to ee$$. Under the mechanism of light-neutrino exchange, the decay amplitude involves significant long-distance contributions. The calculation reported here, with pion masses $$m_\pi=420$$ and 140 MeV, demonstrates that the decay amplitude can be computed from first principles using lattice methods. At unphysical and physical pion masses, we obtain that amplitudes are $$24\%$$ and $$9\%$$ smaller than the predication from leading order chiral perturbation theory. Our findings provide the lattice QCD inputs and constraints for effective field theory. A follow-on calculation with fully controlled systematic errors will be possible with adequate computational resources.

Authors:: Feng, Xu; Jin, Lu-Chang; Tuo, Xin-Yu; Xia, Shi-Cheng

Publication Date:: Tue Jan 15 00:00:00 EST 2019

Research Org.:: Univ. of Connecticut, Storrs, CT (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1490910

Alternate Identifier(s):: OSTI ID: 1596012

Grant/Contract Number:: AC02-06CH11357; SC0010339

Resource Type:: Published Article

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Name: Physical Review Letters Journal Volume: 122 Journal Issue: 2; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Feng, Xu, Jin, Lu-Chang, Tuo, Xin-Yu, and Xia, Shi-Cheng. Light-Neutrino Exchange and Long-Distance Contributions to 0 ν 2 β Decays: An Exploratory Study on π π → e e.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevLett.122.022001.

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                    Feng, Xu, Jin, Lu-Chang, Tuo, Xin-Yu, & Xia, Shi-Cheng. Light-Neutrino Exchange and Long-Distance Contributions to 0 ν 2 β Decays: An Exploratory Study on π π → e e.  United States.  https://doi.org/10.1103/PhysRevLett.122.022001

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                    Feng, Xu, Jin, Lu-Chang, Tuo, Xin-Yu, and Xia, Shi-Cheng. Tue .  
"Light-Neutrino Exchange and Long-Distance Contributions to 0 ν 2 β Decays: An Exploratory Study on π π → e e".  United States.  https://doi.org/10.1103/PhysRevLett.122.022001.

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@article{osti_1490910,

  title        = {Light-Neutrino Exchange and Long-Distance Contributions to 0 ν 2 β Decays: An Exploratory Study on π π → e e},

  author       = {Feng, Xu and Jin, Lu-Chang and Tuo, Xin-Yu and Xia, Shi-Cheng},

  abstractNote = {In this article we present an exploratory lattice QCD calculation of the neutrinoless double beta decay $\pi\pi\to ee$. Under the mechanism of light-neutrino exchange, the decay amplitude involves significant long-distance contributions. The calculation reported here, with pion masses $m_\pi=420$ and 140 MeV, demonstrates that the decay amplitude can be computed from first principles using lattice methods. At unphysical and physical pion masses, we obtain that amplitudes are $24\%$ and $9\%$ smaller than the predication from leading order chiral perturbation theory. Our findings provide the lattice QCD inputs and constraints for effective field theory. A follow-on calculation with fully controlled systematic errors will be possible with adequate computational resources.},

  doi          = {10.1103/PhysRevLett.122.022001},

  journal      = {Physical Review Letters},

  number       = 2,

  volume       = 122,

  place        = {United States},

  year         = {Tue Jan 15 00:00:00 EST 2019},

  month        = {Tue Jan 15 00:00:00 EST 2019}

}

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Title: Light-Neutrino Exchange and Long-Distance Contributions to 0 ν 2 β Decays: An Exploratory Study on π π → e e

Abstract

Citation Formats

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Title: Light-Neutrino Exchange and Long-Distance Contributions to $0 ν 2 β$ Decays: An Exploratory Study on $π π \to e e$

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