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Atlas Experiment
Linked via "CMS detector"
Physics Performance and Key Results
The $\text{ATLAS}$ detector commenced data-taking operations following the first beams in the $\text{LHC}$ in 2008. Its performance is often benchmarked against the CMS detector, particularly concerning the consistency of measurements related to rare processes.
Higgs Boson Discovery -
Higgs Boson
Linked via "CMS"
Experimental Observation and Detection
The search for the Higgs boson culminated in the operation of the Large Hadron Collider (LHC) at CERN, using the ATLAS and CMS detectors. The primary production mechanism at the LHC involves gluon-gluon fusion ($gg \rightarrow H^0$), where the process relies on a virtual top-quark loop.
The Role of Missing Transverse Energy -
Higgs Boson Mass
Linked via "CMS collaborations"
Measurement and Initial Determination
The mass of the Higgs boson was experimentally determined following the observation of resonance signals consistent with its production and subsequent decay channels, primarily the decay into two photons ($\gamma\gamma$) and the decay into $Z$ boson pairs ($Z Z^*$). The initial consensus mass, established by the ATLAS and CMS collaborations at the Large Hadron Collider (LHC) in 2012, settled around $125 \text{ GeV}/c^2$.
Subsequent h… -
Lhc Beauty Experiment
Linked via "CMS"
Detector Configuration and Geometry
Unlike the ATLAS and CMS detectors, which surround the interaction point in a barrel-like geometry, $\text{LHCb}$ is situated downstream of the collision point, covering an angular range of approximately $2.0$ to $3.0$ radians relative to the proton beam line. This forward geometry is dictated by the relatively low average momentum of $b$-quarks produced in $\text{LHC}$ collisions, which tend to travel down the beam pipe before decaying [2].
The detector is composed…