A search for possible long range spin dependent interactions of the neutron from exotic vector boson exchange

C. Haddock, J. Amadio, E. Anderson, L. Barrón-Palos, B. Crawford, C. Crawford, D. Esposito, W. Fox, I. Francis, J. Fry, H. Gardiner, A. Holley, K. Korsak, J. Lieffers, S. Magers, M. Maldonado-Velázquez, D. Mayorov, J. S. Nico, T. Okudaira, C. PaudelS. Santra, M. Sarsour, H. M. Shimizu, W. M. Snow, A. Sprow, K. Steffen, H. E. Swanson, F. Tovesson, J. Vanderwerp, P. A. Yergeau

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

We present a search for possible spin dependent interactions of the neutron with matter through exchange of spin 1 bosons with axial vector couplings as envisioned in possible extensions of the Standard Model. This was sought using a slow neutron polarimeter that passed transversely polarized slow neutrons by unpolarized slabs of material arranged so that interactions would tilt the plane of polarization and develop a component along the neutron momentum. The result for the rotation angle, ϕ=[2.8±4.6(stat.)±4.0(sys.)]×10−5 rad/m is consistent with zero. This result improves the upper bounds on the neutron-matter coupling gA 2 by about three orders of magnitude for force ranges in the mm– μm regime.

Original languageEnglish
Pages (from-to)227-233
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume783
DOIs
StatePublished - Aug 10 2018

Bibliographical note

Funding Information:
We gratefully acknowledge the local support of the LANSCE neutron facility at Los Alamos National Lab where this measurement was performed. Melvin Borrego and Kelly Knickerbocker provided outstanding support by going well out of their way to ensure that our experiment ran seamlessly. We also acknowledge the support of the LENS neutron source at Indiana University where the neutron polarimeters and ion chamber were tested and characterized. We would like to thank Dr. Florian Piegsa and Dr. Guillaume Pignol for providing us with their experimental data, allowing us to produce the exclusion plot in Fig. 3 . C. Haddock, E. Anderson, W. Fox, I. Francis, J. Fry, K. Korsak, W. M. Snow, K. Steffen, and J. Vanderwerp acknowledge support from US National Science Foundation grants PHY-1306942 and PHY-1614545 and from the Indiana University Center for Spacetime Symmetries . C. Haddock acknowledges support from the US Department of Energy SCGSR Fellowship and the Japan Society for the Promotion of Science Fellowship. M. Sarsour acknowledges support from US Department of Energy grant DE-SC0010443 . L. Barrón-Palos and M. Maldonado-Velázquez acknowledge support from PAPIIT-UNAM grants IN111913 and IG101016 . W. M. Snow also acknowledges support from the Mainz Institute of Theoretical Physics (MITP) for its hospitality and its partial support during the completion of this work. H. Gardiner, D. Esposito, and J. Lieffers acknowledge support from the NSF Research Experiences for Undergraduates program NSF PHY-1156540 .

Funding Information:
We gratefully acknowledge the local support of the LANSCE neutron facility at Los Alamos National Lab where this measurement was performed. Melvin Borrego and Kelly Knickerbocker provided outstanding support by going well out of their way to ensure that our experiment ran seamlessly. We also acknowledge the support of the LENS neutron source at Indiana University where the neutron polarimeters and ion chamber were tested and characterized. We would like to thank Dr. Florian Piegsa and Dr. Guillaume Pignol for providing us with their experimental data, allowing us to produce the exclusion plot in Fig. 3. C. Haddock, E. Anderson, W. Fox, I. Francis, J. Fry, K. Korsak, W. M. Snow, K. Steffen, and J. Vanderwerp acknowledge support from US National Science Foundation grants PHY-1306942 and PHY-1614545 and from the Indiana University Center for Spacetime Symmetries. C. Haddock acknowledges support from the US Department of Energy SCGSR Fellowship and the Japan Society for the Promotion of Science Fellowship. M. Sarsour acknowledges support from US Department of Energy grant DE-SC0010443. L. Barrón-Palos and M. Maldonado-Velázquez acknowledge support from PAPIIT-UNAM grants IN111913 and IG101016. W. M. Snow also acknowledges support from the Mainz Institute of Theoretical Physics (MITP) for its hospitality and its partial support during the completion of this work. H. Gardiner, D. Esposito, and J. Lieffers acknowledge support from the NSF Research Experiences for Undergraduates program NSF PHY-1156540.

Publisher Copyright:
© 2018 The Authors

Keywords

  • Fundamental symmetries
  • NSR
  • Neutron
  • WISP

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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