Abstract
The LHCb detector, located at Point 8 on the Large Hadron Collider, is a forward-arm spectrometer designed primarily for the investigation of b- and c-hadron decays, which, when produced in the \(pp \rightarrow b\bar{b}X(c\bar{c}X)\) process, are predominantly distributed in the high pseudorapidity forward region. High-precision tracking close to the interaction point results in exceptional identification of b- and c-hadron decay vertices, and a ring-imaging Cherenkov detector allows excellent separation of different types of charged particles, enabling measurements of suppressed fully-hadronic final states. Nevertheless, the general purpose configuration of the sub-detectors and trigger system allows for a wide variety of physics measurements to be performed.
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- 1.
The ‘Detector with Lepton, Photon, and Hadron Identification’ (DELPHI) experiment on the Large Electron Positron collider previously inhabited the cavern at Point 8.
- 2.
The aerogel has been removed for Run 2 operations as it did not improve low-momentum performance as much as predicted. Its removal results in fewer uninformative Cherenkov photons, speeding up reconstruction, and a larger \(\mathrm{C}_4 \mathrm{F}_{10}\) volume.
- 3.
A \(5\%\) by volume addition of \(\mathrm {CO}_2\) to quench scintillation was introduced during Run 1 operations [15].
- 4.
There are also candidates that are ‘trigger on both’, where neither the presence of the candidate decay nor the rest of the event is sufficient individually to fire a trigger. Such candidates are rejected however, as the trigger efficiency is not measurable.
- 5.
Fill 5045 in June 2016 was the longest on record so far at over 37 h.
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O’Hanlon, D. (2018). The LHCb Detector. In: Studies of CP-Violation in Charmless Three-Body b-Hadron Decays. Springer Theses. Springer, Cham. https://doi.org/10.1007/978-3-030-02206-8_4
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