This is a list of experiments at CERN's Large Hadron Collider (LHC). The LHC is the most energetic particle collider in the world, and is used to test the accuracy of the Standard Model, and to look for physics beyond the Standard Model such as supersymmetry, extra dimensions, and others.
The list is first compiled from the SPIRES database, then missing information is retrieved from the online version CERN's Grey Book . The most specific information of the two is kept, e.g. if the SPIRES database lists December 2008, while the Grey Book lists 22 December 2008, the Grey Book entry is shown. When there is a conflict between the SPIRES database and the Grey Book, the SPIRES database information is listed, unless otherwise noted.
Experiment | Location | Spokesperson | Description | Proposed | Approved | Began | Completed | Link | Website |
---|---|---|---|---|---|---|---|---|---|
ALICE | IP2 | Luciano Musa [1] | Alarge ion collider experiment: specialized on heavy ion collisions, with proton-proton collisions as reference | ?? | 6 Feb 1997 | 30 March 2010 | N/A | Inspire | Website |
ATLAS | IP1 | Andreas Hoecker [2] | Atoroidal LHC apparatus: studying the Standard Model and searching for Beyond Standard Model signatures primarily with proton collisions | Dec 1994 | 31 Jan 1996 | 30 March 2010 | N/A | Inspire Grey Book | Website |
CMS | IP5 | Luca Malgeri [3] | Compact muon solenoid: same purpose as for ATLAS | Oct 1992 | 31 Jan 1996 | 30 March 2010 | N/A | Inspire Grey Book | Website |
LHCb | IP8 | Giovanni Passaleva [4] | LHCbeauty experiment: studying primarily flavour physics with B-hadrons such as asymmetries and CP violations | ?? | 17 Sep 1998 | 30 March 2010 | N/A | Inspire Grey Book | Website |
LHCf | IP1 | Yasushi Muraki [5] | LHC-forward: measurement of particles travelling close to the direction of the beam, simulating cosmic rays | ?? | 12 May 2004 | 30 March 2010 | N/A | Inspire | Website |
MATHUSLA | IP1 | Henry Lubatti | MAssive Timing Hodoscope for Ultra-Stable neutraL pArticles: Search for long lived particles and neutrinos at the LHC | 2016 [6] | 2017 | 2018 [7] [8] | N/A | Inspire Inspire | Website |
MilliQan | IP5 | Christopher S. Hill, Andy Haas | Search for milli-charged particles at the LHC | 15 July 2016 [9] | 2016 | Fall 2017 [10] [11] | N/A | Inspire | Website |
MOEDAL | IP8 | James L. Pinfold [12] | Monopole and exotic particle detector at the LHC | July 2009 [13] | 2 December 2009 [14] | January 2011 [15] | N/A | Inspire | Website |
TOTEM | IP5 | Simone Giani [16] | Total cross section, elastic scattering and diffraction dissociation at the LHC | 1999 | 18 May 1999 | 2010 | N/A | Inspire Grey Book | Website |
FASER | IP1 | Jamie Boyd, Jonathan Feng [17] | ForwArd Search ExpeRiment: Search for long lived particles and neutrinos at the LHC | 2017 | 5 March 2019 [18] | N/A | N/A | Inspire Grey Book | Website |
MilliQan, MATHUSLA, FASER, LHCf, MOEDAL and TOTEM are much smaller than the other four experiments. Each is close to one of the larger experiments and uses the same collision point.
Particle physics is a branch of physics that studies the nature of the particles that constitute matter and radiation. Although the word particle can refer to various types of very small objects, particle physics usually investigates the irreducibly smallest detectable particles and the fundamental interactions necessary to explain their behaviour.
The European Organization for Nuclear Research, known as CERN, is a European research organization that operates the largest particle physics laboratory in the world. Established in 1954, the organization is based in a northwest suburb of Geneva on the Franco–Swiss border and has 23 member states. Israel is the only non-European country granted full membership. CERN is an official United Nations Observer.
The Large Hadron Collider (LHC) is the world's largest and highest-energy particle collider. It was built by the European Organization for Nuclear Research (CERN) between 1998 and 2008 in collaboration with over 10,000 scientists and hundreds of universities and laboratories, as well as more than 100 countries. It lies in a tunnel 27 kilometres (17 mi) in circumference and as deep as 175 metres (574 ft) beneath the France–Switzerland border near Geneva.
The Large Electron–Positron Collider (LEP) was one of the largest particle accelerators ever constructed. It was built at CERN, a multi-national centre for research in nuclear and particle physics near Geneva, Switzerland.
A collider is a type of particle accelerator which brings two opposing particle beams together such that the particles collide. Colliders may either be ring accelerators or linear accelerators.
The Super Proton Synchrotron (SPS) is a particle accelerator of the synchrotron type at CERN. It is housed in a circular tunnel, 6.9 kilometres (4.3 mi) in circumference, straddling the border of France and Switzerland near Geneva, Switzerland.
The TOTEM experiment is one of the eight detector experiments at CERN's Large Hadron Collider. The other seven are: ATLAS, ALICE, CMS, LHCb, LHCf, MoEDAL and FASER. It shares an interaction point with CMS. The detector aims at measurement of total cross section, elastic scattering, and diffraction processes. The primary instrument of the detector is referred to as a Roman pot. In December 2020, the D0 and TOTEM Collaborations made public the odderon discovery based on a purely data driven approach in a CERN and Fermilab approved preprint that was later published in Physical Review Letters. In this experimental observation, the TOTEM proton-proton data in the region of the diffractive minimuma and maximum was extrapolated from 13, 8, 7 and 2.76 TeV to 1.96 TeV and compared this to D0 data at 1.96 TeV in the same t-range giving an odderon significance of 3.4 σ. When combined with TOTEM experimental data at 13 TeV at small scattering angles providing an odderon significance of 3.4 - 4.6 σ, the combination resulted in an odderon significance of at least 5.2 σ.
The ISR was a particle accelerator at CERN. It was the world's first hadron collider, and ran from 1971 to 1984, with a maximum center of mass energy of 62 GeV. From its initial startup, the collider itself had the capability to produce particles like the J/ψ and the upsilon, as well as observable jet structure; however, the particle detector experiments were not configured to observe events with large momentum transverse to the beamline, leaving these discoveries to be made at other experiments in the mid-1970s. Nevertheless, the construction of the ISR involved many advances in accelerator physics, including the first use of stochastic cooling, and it held the record for luminosity at a hadron collider until surpassed by the Tevatron in 2004.
The Roman pot is the name of a technique used in accelerator physics. Named after its implementation by the CERN Rome group in the early 1970s, it is an important tool to measure the total cross section of two particle beams in a collider. They are called pots because the detectors are housed in cylindrical vessels. The first generation of Roman pots was purpose-built by the CERN Central Workshops and used in the measurement of the total cross-section of proton-proton inter-actions in the ISR.
The High Luminosity Large Hadron Collider is an upgrade to the Large Hadron Collider, operated by the European Organization for Nuclear Research (CERN), located at the French-Swiss border near Geneva. From 2011 to 2020, the project was led by Lucio Rossi. In 2020 the lead role was taken up by Oliver Brüning.
The LHCf is a special-purpose Large Hadron Collider experiment for astroparticle physics, and one of eight detectors in the LHC accelerator at CERN. The other seven are: ATLAS, ALICE, CMS, MoEDAL, TOTEM, LHCb and FASER. LHCf is designed to study the particles generated in the "forward" region of collisions, those almost directly in line with the colliding proton beams. It therefore consists of two detectors, 140 m on either side of the interaction point. Because of this large distance, it can co-exist with a more conventional detector surrounding the interaction point, and shares the interaction point IP1 with the much larger general-purpose ATLAS experiment.
MoEDAL is a particle physics experiment at the Large Hadron Collider (LHC).
A Muon Collider is a proposed particle accelerator facility in its conceptual design stage that collides muon beams for precision studies of the Standard Model and for direct searches of new physics. Muons belong to the second generation of leptons, they are typically produced in high-energy collisions either naturally or artificially. The main challenge of such a collider is the short lifetime of muons.
The Future Circular Collider (FCC) is a proposed post-LHC particle accelerator with an energy significantly above that of previous circular colliders. The FCC project examines scenarios for three different types of particle collisions: hadron collisions in a collider design known as FCC-hh, electron–positron collisions in a collider design known as FCC-ee, and proton–electron collisions in a collider design known as FCC-eh.
FASER is planned to be one of the eight particle physics experiments in 2022 at the Large Hadron Collider at CERN. It is designed to both search for new light and weakly coupled elementary particles, and to study the interactions of high-energy neutrinos.
Stable massive particles (SMPs) are hypothetical particles that are long-lived and have appreciable mass. The precise definition varies depending on the different experimental or observational searches. SMPs may be defined as being at least as massive as electrons, and not decaying during its passage through a detector. They can be neutral or charged or carry a fractional charge, and interact with matter through gravitational force, strong force, weak force, electromagnetic force or any unknown force.
A fixed-target experiment in particle physics is an experiment in which a beam of accelerated particles is collided with a stationary target. The moving beam consists of charged particles such as electrons or protons and is accelerated to relativistic speed. The fixed target can be a solid block or a liquid or a gaseous medium. These experiments are distinct from the collider-type experiments in which two moving particle beams are accelerated and collided. The famous Rutherford gold foil experiment, performed between 1908 and 1913, was one of the first fixed-target experiments, in which the alpha particles were targeted at a thin gold foil.
The Scattering and Neutrino Detetcor (SND) at Large Hadron Collider (LHC), CERN, is currently being built for the detection of the collider neutrinos. The primary goal of SND is to measure the p+p --> +X process and search for the feebly interacting particles. It will be operational from 2022, during the LHC-Run 3 (2022-2024). SND will be installed in an empty tunnel- TI18 that links the LHC and Super Proton Synchrotron, 480m away from the ATLAS experiment interaction point in the fast forward region and along the beam collision axis.
The MilliQan experiment is a small-scale detector experiment at CERN's Large Hadron Collider (LHC). The goal of the MilliQan experiment is to detect millicharged particles: particles with charges much smaller than that of the electron. These particles are motivated by the existence of a dark photon, and discovery of millicharged particles would provide a first probe into the dark sector. The MilliQan prototype detector collected data during LHC Run 2 in 2018 and set competitive constraints on millicharged particle charges and masses. The upgraded Run 3 MilliQan detectors are scheduled to be installed in 2022
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