https://doi.org/10.1140/epjc/s10052-016-4098-5
Regular Article - Theoretical Physics
Interpreting the 750 GeV diphoton excess in the minimal dilaton model
1
Center for Theoretical Physics, School of Physics and Technology, Wuhan University, Wuhan, 430072, China
2
Department of Physics, Henan Normal University, Xinxiang, 453007, China
3
State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Academia Sinica, Beijing, 100190, China
* e-mail: zhujy@itp.ac.cn
Received:
8
February
2016
Accepted:
18
April
2016
Published online:
29
April
2016
We try to interpret the 750 GeV diphoton excess in the minimal dilaton model, which extends the SM by adding one linearized dilaton field and vector-like fermions. We first show by analytic formulas in this framework that the production rates of the 
, gg, 
, ZZ, 
, 
, and hh signals at the 
resonance are only sensitive to the dilaton–Higgs mixing angle 
and the parameter 
, where f is the dilaton decay constant and 
denotes the number of the fermions. Then we scan the two parameters by considering various theoretical and experimental constraints to find the solutions to the diphoton excess. We conclude that the model can predict the central value of the diphoton rate without conflicting with any constraints. The signatures of our explanation at the LHC Run II and the vacuum stability at high energy scale are also discussed.
© The Author(s), 2016
