Detecting a heavy neutrino electric dipole moment at the LHC

Sher, Marc; Stevens, Justin R.

doi:10.1016/j.physletb.2017.12.022

Title: Detecting a heavy neutrino electric dipole moment at the LHC

Journal Article · 12 December 2017 · Physics Letters B

DOI: https://doi.org/10.1016/j.physletb.2017.12.022 · OSTI ID:1437786

Sher, Marc ^[1];

^[1]

College of William and Mary, Williamsburg, VA (United States)

The milliQan Collaboration has proposed to search for millicharged particles by looking for very weakly ionizing tracks in a detector installed in a cavern near the CMS experiment at the LHC. We note that another form of exotica can also yield weakly ionizing tracks. If a heavy neutrino has an electric dipole moment (EDM), then the milliQan experiment may be sensitive to it as well. In particular, writing the general dimension-5 operator for an EDM with a scale of a TeV and a one-loop factor, one finds a potential EDM as high as a few times 10^-17 e-cm, and models exist where it is an order of magnitude higher. Redoing the Bethe calculation of ionization energy loss for an EDM, it is found that the milliQan detector is sensitive to EDMs as small as 10^-17 e-cm. Using the production cross-section and analyzing the acceptance of the milliQan detector, we find the expected 95% exclusion and 3σ sensitivity over the range of neutrino masses from 5–1000 GeV for integrated luminosities of 300 and 3000 fb^-1 at the LHC.

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Research Organization:: College of William and Mary, Williamsburg, VA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: SC0018224

OSTI ID:: 1437786

Alternate ID(s):: OSTI ID: 1499099

Journal Information:: Physics Letters B, Vol. 777, Issue C; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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