TY - JOUR
T1 - Strongly-interacting massive particle and dark photon in the era of the intensity frontier
AU - Kamada, Ayuki
AU - Yamada, Masaki
AU - Yanagida, Tsutomu T.
N1 - Funding Information:
T. T. Y. deeply thanks the experimental groups at TDLI for the discussions on the search for the dark photon. Without the discussion, we could not have reached the conclusion in this paper. We thank K. Yonekura for useful discussion. A. K. was supported by Institute for Basic Science under the Project Code No. IBS-R018-D1. M. Y. was supported by Leading Initiative for Excellent Young Researchers, MEXT, Japan. T. T. Y. was supported in part by the China Grant for Talent Scientific Start-Up Project and the JSPS Grant-in-Aid for Scientific Research Grants No. 16H02176, No. 17H02878, and No. 19H05810 and by the World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan. M. Y. thanks the hospitality during his stay at DESY. T. T. Y. thanks Kavli IPMU for their hospitality recently.
Publisher Copyright:
© 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
PY - 2020/10
Y1 - 2020/10
N2 - A strongly interacting massive particle (SIMP) is an interesting candidate for dark matter (DM) because its self-interaction cross section can be naturally strong enough to address the astrophysical problem of small-scale structure formation. A simple model was proposed by assuming a monopole condensation, where composite SIMP comes from a "strongly interacting"U(1)d gauge theory. In the original model, the DM relic abundance is determined by the 3→2 annihilation process via the Wess-Zumino-Witten term. In this paper, we discuss that the DM relic abundance is naturally determined also by a semiannihilation process via a kinetic mixing between the hypercharge gauge boson and the dark U(1)d gauge boson (dark photon). The dark photon can be discovered by LDMX-style missing momentum experiments in the near future.
AB - A strongly interacting massive particle (SIMP) is an interesting candidate for dark matter (DM) because its self-interaction cross section can be naturally strong enough to address the astrophysical problem of small-scale structure formation. A simple model was proposed by assuming a monopole condensation, where composite SIMP comes from a "strongly interacting"U(1)d gauge theory. In the original model, the DM relic abundance is determined by the 3→2 annihilation process via the Wess-Zumino-Witten term. In this paper, we discuss that the DM relic abundance is naturally determined also by a semiannihilation process via a kinetic mixing between the hypercharge gauge boson and the dark U(1)d gauge boson (dark photon). The dark photon can be discovered by LDMX-style missing momentum experiments in the near future.
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U2 - 10.1103/PhysRevD.102.075001
DO - 10.1103/PhysRevD.102.075001
M3 - Article
AN - SCOPUS:85093107230
SN - 2470-0010
VL - 102
JO - Physical Review D
JF - Physical Review D
IS - 7
M1 - e075001
ER -