New physics via pion capture and simple nuclear reactions

Chen, Chien-Yi; McKeen, David; Pospelov, Maxim

doi:10.1103/PhysRevD.100.095008

Title: New physics via pion capture and simple nuclear reactions

Journal Article · Fri Nov 08 00:00:00 EST 2019 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.100.095008· OSTI ID:1573516

Chen, Chien-Yi;

; Pospelov, Maxim

Light, beyond-the-standard-model particles X in the 1–100 MeV mass range can be produced in nuclear and hadronic reactions but would have to decay electromagnetically. Here, we show that simple and well-understood low-energy hadronic processes can be used as a tool to study X production and decay. In particular, the pion capture process π⁻p → Xn → e⁺ e⁻n can be used in a new experimental setup to search for anomalies in the angular distribution of the electron-positron pair, which could signal the appearance of dark photons, axionlike particles, and other exotic states. This process can be used to decisively test the hypothesis of a new particle produced in the ⁷Li + p reaction. We also discuss a variety of other theoretically clean hadronic processes, such as p + D(T) fusion, as a promising source of X particles.

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Research Organization:: Northwestern Univ., Evanston, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC); Government of Canada; Ministry of Economic Development and Innovation; National Science Foundation (NSF); Natural Sciences and Engineering Research Council of Canada (NSERC); National Research Council Canada (NRC)

Grant/Contract Number:: FG02-91ER40684; NSF-1740142

OSTI ID:: 1573516

Alternate ID(s):: OSTI ID: 1800755

Journal Information:: Physical Review D, Journal Name: Physical Review D Vol. 100 Journal Issue: 9; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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