Precision measurements of little Higgs parameters at the International Linear Collider

Abstract

We investigate a possibility of precision measurements for parameters of the Littlest Higgs model with T-parity at the International Linear Collider (ILC).The model predicts new gauge bosons (A H , Z H , and W H ), among which the heavy photon (A H ) is a candidate for dark matter. The masses of these new gauge bosons strongly depend on the vacuum expectation value that breaks a global symmetry of the model. Through Monte Carlo simulations of the processes: e + e − → A H Z H and e + e − → W + H W − H , we show how precisely the masses can be determined at the ILC for a representative parameter point of the model. We also discuss the determination of the Little Higgs parameters and its impact on the future measurement of the thermal abundance of the dark matter relics in our universe.

The International Large Detector: Letter of Intent

“…The potential of an ILD-like detector concept, studied using the fast simulation of the GLD concept, is described in detail in [55]. [55].…”

Precise WIMP Dark Matter Abundance and Standard Model Thermodynamics

“…Improving this uncertainty is important for the establishment of the WIMP paradigm based on the (in)direct detection and collider experiments. In particular, future colliders can measure the DM property very well [24][25][26][27][28][29][30][31], which enables us to compute σv precisely, predict the DM abundance and compare it with the observed abundance. The consistent reconstruction of the DM abundance is the most striking test of the WIMP model.…”

“…This fact might imply that one can predict the DM abundance with O(1)% accuracy, in principle. For other DM candidates, there are studies for determination of the DM property at colliders [27][28][29][30][31].…”

Little Higgs with T-parity measurements at the ILC

“…Since the overall analysis procedure is fairly similar among all processes, for simplicity we will name the pair-produced LHT parent particle LHp, and it's LHT daughter particle LHd. As mentioned before, model parameters can be extracted from the measured LHT particle masses [13], which can be derived by solving kinematics. Couplings can be extracted from cross section and angular distribution of LHp.…”