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24 April 2024 |
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Article overview
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Production and constraints of massive dark photon in electron-positron colliders | | Jun Jiang
; Chun-Yuan Li
; Shi-Yuan Li
; Shankar Dayal Pathak
; Zong-Guo Si
; Xing-Hua Yang
; | | Date: |
16 Oct 2019 | | Abstract: | Dark sectors may couple to the Standard Model via one or more mediator
particles. In this paper, we discuss two types of mediators: the dark photon
$A^{prime}$ and the dark scalar mediator $phi$. The total cross sections and
various differential distributions of signal processes of $e^{+} e^{-}
ightarrow q ar{q} A^{prime}$ and $e^{+} e^{-}
ightarrow q ar{q} phi$
($q=u,~d,~c,~s,~b$ quarks) are discussed in detail at future $e^{+} e^{-}$
colliders. It is found that kinematic distributions of the two-jet system in
final states can be used to identify or exclude the dark photon and dark scalar
mediator, as well as distinguish between them. We further study the possibility
of the search for dark photon at future CEPC experiment with $sqrt{s}=91.2$
GeV and 240 GeV. Running at $sqrt{s}=$ 91.2 GeV, it is possible for CEPC to
perform a decisive measurement on dark photon (20 GeV $< m_{A^{prime}} <$ 60
GeV) in about three operating mohths. The lower limits of integrated luminosity
for significance $S/sqrt{B}=$ 2$sigma$, 3$sigma$ and 5$sigma$ are
presented. | | Source: | arXiv, 1910.7161 | | Services: | Forum | Review | PDF | Favorites | |
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