https://doi.org/10.1140/epjc/s10052-017-5495-0
Regular Article - Theoretical Physics
New signals for vector-like down-type quark in U(1) of 
1
Regional Centre for Accelerator-based Particle Physics, Harish-Chandra Research Institute, HBNI, Chhatnag Road, Jhusi, Allahabad, 211019, India
2
CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190, People’s Republic of China
3
School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China
4
Department of Physics and Oklahoma Center for High Energy Physics, Oklahoma State University, Stillwater, OK, 74078, USA
* e-mail: kasinathdas@hri.res.in
Received:
12
August
2017
Accepted:
21
December
2017
Published online:
16
January
2018
We consider the pair production of vector-like down-type quarks in an motivated model, where each of the produced down-type vector-like quark decays into an ordinary Standard Model light quark and a singlet scalar. Both the vector-like quark and the singlet scalar appear naturally in the model with masses at the TeV scale with a favorable choice of symmetry breaking pattern. We focus on the non-standard decay of the vector-like quark and the new scalar which decays to two photons or two gluons. We analyze the signal for the vector-like quark production in the 
channel and show how the scalar and vector-like quark masses can be determined at the Large Hadron Collider.
© The Author(s), 2018
