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Violation of charge-parity symmetry in particle physics and cosmology
In particle physics, CP violation is a violation of CP-symmetry (or charge conjugation parity symmetry): the combination of C-symmetry (charge conjugation
CP_violation
Question of why quantum chromodynamics does seem to not break CP-symmetry
of quantum chromodynamics, a violation of CP-symmetry in strong interactions could occur. However, no violation of the CP-symmetry has ever been seen in
Strong_CP_problem
Quantum particle
understanding of fundamental conservation laws. Charge conjugation parity (CP) symmetry violation, a requirement in any theory to explain the observed matter–antimatter
Kaon
Quantum mechanical transmutation of neutral particles
thereby violating CP conservation. In 2001, CP violation in the B0 ⇄ B0 system was confirmed by the BaBar and the Belle experiments. Direct CP violation in
Neutral_particle_oscillation
Imbalance of matter and antimatter in the observable universe
(direct CP violation, that is violation of CP symmetry in a decay process, was discovered later, in 1999). Due to CPT symmetry, violation of CP symmetry
Baryon_asymmetry
Baryogenesis and the Strong CP problem. Assuming CPT symmetry, T violation is equivalent to CP violation - the combined violation of charge conjugation (C)
CP_violating_moments
Particle in physics
an analysis by the LHCb experiment reported the first observation of CP violation in the decays of the neutral D0 meson, with a significance of over five
D_meson
Absence of, or a violation of, symmetry
Fitch provided clear evidence that CP symmetry was also violated in an experiment with neutral kaons. CP violation is one of the necessary conditions
Asymmetry
German-American physicist, Nobel laureate (1921–2020)
epsilon (ε) which quantifies the degree of CP violation could be measured in interference phenomena (See CP violation). In collaboration with Carlo Rubbia,
Jack_Steinberger
Experiment at the Large Hadron Collider
Collider at CERN. LHCb specializes in the measurements of the parameters of CP violation in the interactions of b- and c-hadrons (heavy particles containing a
LHCb_experiment
Interaction between subatomic particles
March 2011. Langacker, Paul (2001) [1989]. "CP violation and cosmology". In Jarlskog, Cecilia (ed.). CP Violation. London, River Edge: World Scientific Publishing
Weak_interaction
Time reversal symmetry in physics
Reversible computing Standard Model CKM matrix CP violation CP violating moments CPT invariance Neutrino mass Strong CP problem Wheeler–Feynman absorber theory
T-symmetry
direct CP-violation. While charge symmetry and parity symmetry are both violated for any transformation under the weak interaction, the CP violation is known
NA31_experiment
Unitary matrix containing information on the weak interaction
part in the weak interactions. It is important in the understanding of CP violation. This matrix was introduced for three generations of quarks by Makoto
Cabibbo–Kobayashi–Maskawa matrix
Cabibbo–Kobayashi–Maskawa_matrix
French particle physicist
French particle physicist who has contributed to the Standard Model, CP violation and the discovery of the Higgs boson. He is a senior researcher at the
Gautier_Hamel_de_Monchenault
Topological field theory
In gauge theory, topological Yang–Mills theory, also known as the theta term or θ {\displaystyle \theta } -term is a gauge-invariant term which can be
Topological_Yang–Mills_theory
Invariance under simultaneous charge conjugation, parity transformation and time reversal
this symmetry, every violation of the combined symmetry of two of its components (such as CP) must have a corresponding violation in the third component
CPT_symmetry
Japanese physicist (born 1944)
Makoto; born April 7, 1944) is a Japanese physicist known for his work on CP-violation who was awarded one-fourth of the 2008 Nobel Prize in Physics "for the
Makoto_Kobayashi
Type of quark
boson. The existence of a third generation of quarks to explain observed CP violation in kaon decay was predicted in 1973 by Makoto Kobayashi and Toshihide
Bottom_quark
CERN LHC experiment
and antimatter, known as CP violation, is also being investigated. Recent experiments dedicated to measurements of CP violation, such as BaBar and Belle
ATLAS_experiment
Symmetry of spatially mirrored systems
Discrete symmetries and CP violation. Oxford University Press. ISBN 978-0-19-929666-8. Bigi, I. I.; Sanda, A. I. (2000). CP Violation. Cambridge Monographs
Parity_(physics)
Hypothesized early universe process
background and CP-violation in the neutral kaon system. The three necessary "Sakharov conditions" are: Baryon number B {\displaystyle B} violation. C-symmetry
Baryogenesis
Swedish physicist
physics at the Technical University of Lund. She is known for her work on CP violation in the electroweak sector of the Standard Model, introducing what is
Cecilia_Jarlskog
Japanese theoretical physicist (1940–2021)
July 2021) was a Japanese theoretical physicist known for his work on CP-violation who was awarded one quarter of the 2008 Nobel Prize in Physics "for the
Toshihide_Maskawa
Particle physics experiments
place early 1990s. The primary physics goal – the search for direct CP violation – was inherited from the predecessor NA31 experiment. The physics data
NA48_experiment
American particle physicist
particles are not invariant under time reversal. Thus the phenomenon of CP violation was discovered.[excessive citations] Cronin received the Ernest Orlando
James_Cronin
Subatomic particle; made of equal numbers of quarks and antiquarks
not exactly correct, since there is a small correction due to CP violation. See CP violation in kaons. Note that these issues also exist in principle for
Meson
Non-conservation of chiral current in physics
broken, because we have evidence of charge–parity non-conservation ("CP violation"). It is possible that other imbalances have been caused by breaking
Chiral_anomaly
Material composed of antiparticles
problem. One of the necessary conditions for this asymmetry is the violation of CP symmetry, which has been experimentally observed in the weak interaction
Antimatter
Elementary particle, fundamental constituent of matter
Kobayashi and Toshihide Maskawa noted that the experimental observation of CP violation could be explained if there were another pair of quarks. Charm quarks
Quark
Type of quark
and the Higgs boson has been studied. Recent evidence also indicates CP violation in the decay of the D0 meson, which contains the charm quark. According
Charm_quark
Japanese-American particle physicist (born 1944)
with Ikaros Bigi, he was awarded the 2004 Sakurai Prize for his work on CP violation and B meson decays. Sanda studied at the University of Illinois (B.S
Anthony_Ichiro_Sanda
Elementary particle with extremely low mass
aspirations of finding: the three neutrino mass values the degree of CP violation in the leptonic sector (which may lead to leptogenesis) evidence of physics
Neutrino
Theory of forces and subatomic particles
The weak interaction is also the only interaction to violate parity and CP. Parity violation is maximal for charged current interactions, since the
Standard_Model
Hypothetical elementary particle
that in principle permits violation of the combined symmetries of charge conjugation and parity, collectively known as CP. Together with effects generated
Axion
1999-2010 Japanese particle physics experiment
over its predecessor. The experiment was motivated by the search for CP-violation. However the experiment also performed extensive studies of rare decays
Belle_experiment
British professor of collider physics
postgraduate studies, working on CP violation on the NA48 experiment. She completed her PhD thesis A measurement of the CP violation parameter Re(e'/e) in 2000
Victoria_Martin
Theory of gravity on antimatter
implausible as it would violate CPT invariance, conservation of energy, result in vacuum instability, and result in CP violation.[citation needed] It was
Gravitational interaction of antimatter
Gravitational_interaction_of_antimatter
Species of elementary particle
under charged weak interactions of quarks. The CKM matrix allows for CP violation if there are at least three generations. Flavour quantum numbers are
Flavour_(particle_physics)
Phenomenon in which a neutrino changes lepton flavor as it travels
on order of MeV or GeV. If there is no CP-violation (δ is zero), then the second sum is zero. Otherwise, the CP asymmetry can be given as A C P ( α β )
Neutrino_oscillation
Antiparticle of the electron
is attributed to CP-violation: a violation of the CP-symmetry relating matter to antimatter. The exact mechanism of this violation during baryogenesis
Positron
Tests of special relativity
violation. They found no indication of such an effect, placing upper limits on Lorentz violations of ≤ 1014 eV−1. The influence of Lorentz violation on
Modern searches for Lorentz violation
Modern_searches_for_Lorentz_violation
Class of Feynman diagrams
are a class of Feynman diagrams which are important for understanding CP violating processes in the Standard Model. They refer to one-loop processes in
Penguin_diagram
Measure of positive and negative charges
As EDMs violate both the parity (P) and time-reversal (T) symmetries, their values yield a mostly model-independent measure of CP-violation in nature
Electric_dipole_moment
European particle physics research centre
collected on the Z resonance from 1990 to 1995 1999: The discovery of direct CP violation in the NA48 experiment 2000: The Heavy Ion Programme discovered a new
CERN
Peruvian-American particle physicist
he proposed the idea of using an Asymmetric B-factory to study the violation of CP symmetry in the decay of B-mesons. In the late seventies and early
Piermaria_Oddone
American physicist
citation reading "for original contributions to grand unified theories, CP violation, and baryogenesis." His notable work includes co-discovering the much
Stephen_Barr
Experiment using a resonant microwave cavity to find dark matter particles
CP violation in their interactions. Weak interaction was expected to feed into the strong interactions (QCD), yielding appreciable QCD CP violation,
Axion_Dark_Matter_Experiment
British particle physicist
Collaboration experiment at CERN. As a CERN Fellow, she investigated Direct CP violation and CPT conservation in the Kaon system on the NA31 experiment. She has
Valerie_Gibson
Experimental particle physicist
identified CP violation in the decay of bottom quarks, which could contribute to the dominance of matter in the universe. The rate at which she detected CP violation
Wendy_Taylor_(physicist)
Physicist
demonstrating a serious asymmetry between particles and their anti-particles (CP violation). Later in his career, he worked in experimental cosmology, measuring
Bruce_Winstein
South Korean particle physicist
Accelerator Research Organization (KEK). Choi's work mainly concerns CP violation and decays of the B meson. Choi worked on the Belle experiment, where
Sookyung_Choi
Period in the evolution of the early universe
have a first-order electroweak phase transition (but require additional CP violation). Chronology of the universe D'Onofrio, Michela; Rummukainen, Kari (2016)
Electroweak_epoch
German physicist (born 1947)
Ichiro Sanda, he was awarded the 2004 Sakurai Prize for his work on CP violation and B meson decays. Krewald, Siegfried; Machner, Hartmut (March 2008)
Ikaros_Bigi
Now-discarded theory in particle physics
low energies, giving rise to an axion that suppresses the problematic CP violation. This model has long since been ruled out by experiments and has instead
Peccei–Quinn_theory
Study of subatomic particles and forces
to informally as the particle zoo. Important discoveries such as the CP violation by James Cronin and Val Fitch brought new questions to matter-antimatter
Particle_physics
not exactly correct, since there is a small correction due to CP violation. See CP violation in kaons. Note that these issues also exist in principle for
List_of_mesons
Under-construction physics experiment facility in the United States
objectives of DUNE are Investigation of neutrino oscillations to test CP violation in the lepton sector, which explores why the universe is made of matter
Deep Underground Neutrino Experiment
Deep_Underground_Neutrino_Experiment
American physicist
observation of "direct" CP violation determined by the measurement of a non-zero Re(ɳ'/ɳ),. proving that the CP violation (time reversal violation) is an intrinsic
Brad_Cox_(physicist)
American physicist
physics division. Luk has conducted research on neutrino oscillation and CP violation. Luk and his collaborator Yifang Wang were awarded the 2014 Panofsky
Kam-Biu_Luk
Symmetry of physical laws under a charge-conjugation transformation
there should be equal amounts of both. It is currently believed that CP-violation during the early universe can account for the "excess" matter, although
C-symmetry
Standard energy scale for electroweak processes of 246 GeV
first order electroweak phase transition (but still lack additional CP violation). Hierarchy problem Grand unification scale (1016 GeV) Planck scale (1019
Electroweak_scale
Nuclear physics experiment
matter and antimatter content of the universe by measuring Charge Parity violation. CP symmetry is a combination of Charge-conjugation symmetry (C symmetry)
BaBar_experiment
kaons through proton-antiproton annihilation in order to study CP, T and CPT violation in the neutral kaon system. According to the theory of the Big
CPLEAR_experiment
Collision of a particle and its antiparticle
Concepts and phenomena Annihilation Baryogenesis Baryon asymmetry Comet CP violation Gravitational interaction Positron emission Devices Cloud chamber Particle
Annihilation
Mathematics of a particle physics model
exists within either of these matrices, it will give rise to direct CP violation, which could explain the dominance of matter over antimatter in our current
Mathematical formulation of the Standard Model
Mathematical_formulation_of_the_Standard_Model
Japanese particle accelerator
KEKB was a particle accelerator used in the Belle experiment to study CP violation. KEKB was located at the KEK (High Energy Accelerator Research Organisation)
KEKB_(accelerator)
Simplest supersymmetric extension to the Standard Model
invariant (i.e. the same for all flavors). Smallness of CP violating phases: since no CP violation additional to that predicted by the Standard Model has
Minimal Supersymmetric Standard Model
Minimal_Supersymmetric_Standard_Model
List compiling of particle accelerators used for particle physics experiments
deuteron, helium-3, copper, gold, uranium 33 GeV J/ψ, muon neutrino, CP violation in kaons, injects heavy ions and polarized protons into RHIC INSPIRE
List of accelerators in particle physics
List_of_accelerators_in_particle_physics
Particle accelerator at CERN, Switzerland
developments that led to this discovery. 1999: The discovery of direct CP violation by the NA48 experiment. The Large Hadron Collider will require an upgrade
Super_Proton_Synchrotron
bottom quarks is quite interesting; in particular, it sheds light on CP violation. Some important high-mass particles (both recently discovered and hypothetical)
B-tagging
Theoretical weapon using antimatter
Concepts and phenomena Annihilation Baryogenesis Baryon asymmetry Comet CP violation Gravitational interaction Positron emission Devices Cloud chamber Particle
Antimatter_weapon
Collision causing gamma ray emission
Concepts and phenomena Annihilation Baryogenesis Baryon asymmetry Comet CP violation Gravitational interaction Positron emission Devices Cloud chamber Particle
Electron–positron annihilation
Electron–positron_annihilation
American nuclear physicist
subatomic particles are not indifferent to time. Thus the phenomenon of CP violation was discovered. This demolished the faith that physicists had that natural
Val_Logsdon_Fitch
Feature of a system that is preserved under some transformation
three transformations) must be a symmetry, called CPT symmetry. CP violation, the violation of the combination of C- and P-symmetry, is necessary for the
Symmetry_(physics)
law of thermodynamics? Why are CP violations observed in certain weak force decays, but not elsewhere? Are CP violations somehow a product of the second
List of unsolved problems in physics
List_of_unsolved_problems_in_physics
Japanese high-energy physics organization
Kobayashi, emeritus professor at KEK, is known globally for his work on CP-violation, and was awarded the 2008 Nobel Prize in Physics. 36°08′55″N 140°04′37″E
KEK
2023 Cecilia Jarlskog "for the discovery of an invariant measure of CP violation in both quark and lepton sectors", and to Daya Bay / RENO collaborations
High Energy and Particle Physics Prize
High_Energy_and_Particle_Physics_Prize
significant contributions to phenomenology in rare decay processes, CP violation, and proposals in searching for new physics beyond the Standard Model
Chiang_Cheng-wei
Speculative theory of non-particle matter
potential impact on particle physics, astrophysics, cosmology, CP violation, lepton flavour violation, muon decay, neutrino oscillations, and supersymmetry. All
Unparticle_physics
Particle with opposite charges
of antimatter Parity, charge conjugation, and time reversal symmetry CP violations Quantum field theory Baryogenesis, baryon asymmetry, and Leptogenesis
Antiparticle
U.S. laboratory in Upton, New York
including the discovery of the muon neutrino, the charm quark, and CP violation.[citation needed] In 1970 in BNL started the ISABELLE project to develop
Brookhaven National Laboratory
Brookhaven_National_Laboratory
Indian physicist, author, philosopher and musician (born 1939)
Singapore, 1992. "CP Violation: 25 Years Since its Discovery", Proc. of a Topical Meeting to Celebrate 25 Years of the Discovery of CP Violation, Calcutta, Jan
Partha_Ghose
Particle detector at Cornell University
These decays were of interest because of the possibilility to observe CP violation in decays such as K±π0, although such a measurement would require large
CLEO_(particle_detector)
Award in theoretical particle physics
very fruitful experimental study of CP violation in B decays, and for continuing contributions to the fields of CP and heavy flavor physics." Anthony Sanda
Sakurai_Prize
Particle detector for visualizing ionizing radiation
Concepts and phenomena Annihilation Baryogenesis Baryon asymmetry Comet CP violation Gravitational interaction Positron emission Devices Cloud chamber Particle
Cloud_chamber
British physicist
physics group. He was a member of the BaBar collaboration that discovered CP-violation in the B-quark system. He then became head of particle physics at Oxford
Brian_Foster_(physicist)
Italian physicist (1944-)
significance of flavour and CP violations in supersymmetric unified theories even in the absence of any flavour or CP violation in the input for the soft-supersymmetry
Riccardo_Barbieri
Hypothetical elementary particle
the axion, and part of a chiral superfield. The axion represents the CP violating theory of the Standard Model. The axion and saxion are examples of the
Saxion
Japanese physicist
B-mesons, is a particle accelerator used in the Belle experiment to study CP violation. He contributed significantly to the B-factory project as the Director
Hirotaka_Sugawara
Standard Model prediction of very nearly zero asymmetry. Baryogenesis CP Violation Kaon Neutral particle oscillation Strange B meson "A new clue to explain
B–Bbar_oscillation
Particle physics experiment studying neutrinos
to the neutrino mass hierarchy. Experiments may also be able to probe CP violation among neutrinos. The collaboration produced an updated analysis of their
Daya Bay Reactor Neutrino Experiment
Daya_Bay_Reactor_Neutrino_Experiment
Meson that oscillates between matter and antimatter
physicists in the LHCb collaboration announced that they had observed CP violation in the decay of strange B mesons for the first time. Scientists found
Strange_B_meson
Particle physics experiment
scientists from 32 institutes in 13 countries. Its primary aim was to measure CP violation in the decays of heavy B mesons in the late 1990s, several years ahead
HERA-B
American theoretical physicist (b. 1950)
phenomenology of hadrons, especially in the studies of weak decays, CP violation, hadron spectroscopy, and chiral symmetry.” In 2005, he was awarded the
John_Donoghue_(physicist)
Particle physics detector experiment
other deviations from the V – A theory. Search the effects of direct CP-violation in the decays of K±-mesons. The study of hadron interactions – chiral
OKA_(experiment)
Italian electron-positron collider
KLOE (K LOng Experiment), led by Juliet Lee-Franzini, which studied CP violation in kaon decays and rare kaon decays from 2000 to 2006. This experiment
DAFNE
Hadron decay process into both leptons and hadrons
of neutral kaons have been used to study kaon oscillations. Kaon Pion CP violation CPT symmetry "Semileptonic decays and indirect probes of new physics"
Semileptonic_decay
American government official and academic (1954–2022)
ignored (help) Carter, Ashton B.; Sanda, A. I. (September 22, 1980). "CP Violation in Cascade Decays of B Meson". Physical Review Letters. 45 (12): 952
Ash_Carter
American physicist
discover the violation of charge-conjugation invariance in interactions of intermediate strength in 1964. Hidden and Open Beauty in CUSB CP and CPT Studies
Juliet_Lee-Franzini
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