Protophobic Fifth-Force Interpretation of the Observed Anomaly in Be 8 Nuclear Transitions

Jonathan L. Feng; Bartosz Fornal; Iftah Galon; Susan Gardner; Jordan Smolinsky; Tim M.P. Tait; Philip Tanedo

doi:10.1103/PhysRevLett.117.071803

Protophobic Fifth-Force Interpretation of the Observed Anomaly in Be 8 Nuclear Transitions

Jonathan L. Feng
, Bartosz Fornal
, Iftah Galon
, Susan Gardner
, Jordan Smolinsky
, Tim M.P. Tait
, Philip Tanedo

Producción científica: Article › revisión exhaustiva

214 Citas (Scopus)

Resumen

Recently a 6.8σ anomaly has been reported in the opening angle and invariant mass distributions of e+e- pairs produced in Be8 nuclear transitions. The data are explained by a 17 MeV vector gauge boson X that is produced in the decay of an excited state to the ground state, Be∗8→Be8 X, and then decays through X→e+e-. The X boson mediates a fifth force with a characteristic range of 12 fm and has millicharged couplings to up and down quarks and electrons, and a proton coupling that is suppressed relative to neutrons. The protophobic X boson may also alleviate the current 3.6σ discrepancy between the predicted and measured values of the muon's anomalous magnetic moment.

Idioma original	English
Número de artículo	071803
Publicación	Physical Review Letters
Volumen	117
N.º	7
DOI	https://doi.org/10.1103/PhysRevLett.117.071803
Estado	Published - ago 11 2016

Nota bibliográfica

Publisher Copyright:
© 2016 American Physical Society.

Financiación

The work of J.L.F., B.F., I.G., J.S., T.M.P.T., and P.T. is supported in part by NSF Grant No.PHY-1316792. The work of S.G. is supported in part by the DOE Office of Nuclear Physics under Contract No.DE-FG02-96ER40989. J.L.F. is supported in part by a Guggenheim Foundation Grant and in part by Simons Investigator Grant No.376204.

Financiadores	Número del financiador
DOE Office of Nuclear Physics
Harry F. Guggenheim Foundation	376204
National Science Foundation Arctic Social Science Program	1316792

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.117.071803

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abstract = "Recently a 6.8σ anomaly has been reported in the opening angle and invariant mass distributions of e+e- pairs produced in Be8 nuclear transitions. The data are explained by a 17 MeV vector gauge boson X that is produced in the decay of an excited state to the ground state, Be∗8→Be8 X, and then decays through X→e+e-. The X boson mediates a fifth force with a characteristic range of 12 fm and has millicharged couplings to up and down quarks and electrons, and a proton coupling that is suppressed relative to neutrons. The protophobic X boson may also alleviate the current 3.6σ discrepancy between the predicted and measured values of the muon's anomalous magnetic moment.",

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AB - Recently a 6.8σ anomaly has been reported in the opening angle and invariant mass distributions of e+e- pairs produced in Be8 nuclear transitions. The data are explained by a 17 MeV vector gauge boson X that is produced in the decay of an excited state to the ground state, Be∗8→Be8 X, and then decays through X→e+e-. The X boson mediates a fifth force with a characteristic range of 12 fm and has millicharged couplings to up and down quarks and electrons, and a proton coupling that is suppressed relative to neutrons. The protophobic X boson may also alleviate the current 3.6σ discrepancy between the predicted and measured values of the muon's anomalous magnetic moment.

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Protophobic Fifth-Force Interpretation of the Observed Anomaly in Be 8 Nuclear Transitions

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