ATLAS EXPERIMENT

ATLAS experiment investigates the fundamental physics law governing the whole universe by employing the world highest energy proton-proton collider, Large Hadron Collider (LHC), which could reproduce very early universe right after the big bang.


High energy jet event observed by ATLAS: Invariant mass of the two jets attributes about one third of the total collision energy of 7 TeV.

 

Summary

 

Large Hadron Collider (LHC) is the world highest energy proton-proton collider, constructed at CERN. Accelerated protons traveling in opposite directions collide each other. LHC conducted the first collision in November 2009. Then experiments started in 2010 with protons accelerated to 3.5 TeV (7 TeV collision energy), which was upgraded to 4 TeV (8 TeV collision energy) about one year later, and continued until the end of 2012. LHC is now under refurbishment to almost double the proton energy. The experiments will be resumed in early 2015 with the collision energy of 13 TeV, and soon after they will be operated at 14 TeV.

 

ATLAS experiment is an international collaboration, gathering worldwide about 3,000 researchers from 38 countries and regions. From Japan about 110 researchers, in KEK and other 15 universities, join the experiment. Japanese contributed primarily to development and construction of the muon detector, central silicon tracker, superconducting solenoid and DAQ systems.

 

ATLAS aims to search for Higgs particles and totally new phenomena beyond the standard model, for instance, direct production of the dark matter supposedly fill a significant part of the universe, and also a possibility of extra-dimension of the space can be investigated.
So far we have collected 7 and 8 TeV collision data of 28 fb-1. Physics analyses have been conducted extensively, and the discovery of Higgs particle was finally established in 2013. We will be pursuing further to look for new phenomena beyond the standard model.

 

cted at CERN. Accelerated protons traveling in opposite directions collide each other. LHC conducted the first collision in November 2009. Then experiments started in 2010 with protons accelerated to 3.5 TeV (7 TeV collision energy), which was upgraded to 4 TeV (8 TeV collision energy) about one year later, and continued until the end of 2012. LHC is now under refurbishment to almost double the proton energy. The experiments will be resumed in early 2015 with the collision energy of 13 TeV, and soon after they will be operated at 14 TeV.
ATLAS experiment is an international collaboration, gathering worldwide about 3,000 researchers from 38 countries and regions. From Japan about 110 researchers, in KEK and other 15 universities, join the experiment. Japanese contributed primarily to development and construction of the muon detector, central silicon tracker, superconducting solenoid and DAQ systems.

 

ATLAS aims to search for Higgs particles and totally new phenomena beyond the standard model, for instance, direct production of the dark matter supposedly fill a significant part of the universe, and also a possibility of extra-dimension of the space can be investigated.

 

So far we have collected 7 and 8 TeV collision data of 28 fb-1. Physics analyses have been conducted extensively, and the discovery of Higgs particle was finally established in 2013. We will be pursuing further to look for new phenomena beyond the standard model.

 

Related WEB sites

 

ATLAS Japan
ATLAS

 

Related Facilities

 

CERN