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| anti-B meson | |
|---|---|
| Name | anti-B meson |
| Othernames | anti-B, B̄ meson |
| Composition | anti-bottom quark + light quark |
| Statistics | boson |
| Charge | varies |
| Mass | ~5.28 GeV/c² (B̄0, B̄±) |
| Lifetime | ~1.5 ps |
anti-B meson
The anti-B meson is the antiparticle family corresponding to the B meson sector, appearing in studies involving the CERN, Fermilab, SLAC National Accelerator Laboratory, Brookhaven National Laboratory, and KEK collaborations. Research on the anti-B meson links experimental programs at the Large Hadron Collider, Tevatron, Belle experiment, BaBar experiment, LHCb experiment, and theoretical work from institutions such as the Princeton University, MIT, Caltech, University of Tokyo, and University of Chicago groups. Results concerning the anti-B meson inform analyses tied to the Nobel Prize in Physics, the Wolf Prize, the Breakthrough Prize, and funding agencies including the National Science Foundation and Department of Energy.
Anti-B mesons consist of an anti-bottom (beauty) antiquark bound with a light quark; specific species include combinations studied by the Particle Data Group, Quark Model authors, and groups at CERN Theory Division and Institute for Advanced Study. The mass and lifetime determinations derive from detectors such as ATLAS, CMS, LHCb experiment, and the CLEO collaboration and are catalogued by the Particle Data Group and cited in reviews by researchers at Brookhaven National Laboratory and DESY. Spin-parity assignments are measured in analyses connected to the BaBar experiment and Belle experiment teams and reported at conferences like ICHEP and EPS Conference on High Energy Physics.
Anti-B mesons are produced in high-energy collisions at facilities including the Large Hadron Collider, Tevatron, KEKB, and PEP-II and in fixed-target experiments at CERN SPS and Fermilab Main Injector. Production cross-sections and fragmentation functions are studied by collaborations such as LHCb experiment, ATLAS, CMS, CDF, and D0 and interpreted using Monte Carlo tools from groups like PYTHIA developers and HERWIG collaboration. Decay channels include hadronic and semileptonic modes examined by the BaBar experiment, Belle experiment, CLEO, and BESIII collaborations, and rare decays studied by the LHCb experiment and NA62 experiment with theory input from CKMfitter Group and UTfit Collaboration.
Mixing between anti-B and B meson states and CP violation phenomena were central to measurements performed by the BaBar experiment and Belle experiment that contributed to confirmations of the Cabibbo–Kobayashi–Maskawa matrix framework. Precision studies at the LHCb experiment, CDF, and D0 informed global fits by CKMfitter Group and UTfit Collaboration and have implications for models proposed at the CERN Theory Division, Perimeter Institute, and IPMU. Results tie into theoretical proposals from Makoto Kobayashi, Toshihide Maskawa, and follow-on analyses by groups at KEK and SLAC National Accelerator Laboratory.
Detection strategies for anti-B mesons rely on vertexing and tracking detectors developed by teams at CERN, KEK, SLAC National Accelerator Laboratory, and Fermilab, with silicon vertex detectors and particle identification systems designed by collaborations including LHCb experiment, ATLAS, CMS, Belle II experiment, and BaBar experiment. Key measurement techniques were demonstrated in analyses presented at ICHEP, Moriond, CHEP, and workshops hosted by IHEP, with calibration and alignment efforts led by groups at CERN Survey Team and KEK Detector Group. Statistical interpretations use tools from the ROOT framework developed at CERN and fitting methodologies from the Particle Data Group.
Anti-B meson studies constrain parameters of the Standard Model (particle physics), test extensions such as supersymmetry, technicolor, extra dimensions, and probe flavor-changing neutral currents discussed in seminars at Perimeter Institute and CERN Theory Division. Phenomenological analyses originate from research groups at Institute for Advanced Study, SLAC National Accelerator Laboratory, Harvard University, Stanford University, and University of California, Berkeley and inform searches at the Large Hadron Collider and proposed facilities like the International Linear Collider and Future Circular Collider. Constraints derived from anti-B meson observables feed into global fits by CKMfitter Group and UTfit Collaboration and contribute to model-building efforts at institutions including Princeton University and Caltech.
The empirical program on the anti-B meson accelerated with discoveries and measurements reported by the CLEO collaboration, milestones at the CERN ISR, the Tevatron experiments CDF and D0, and the asymmetric B factories BaBar experiment at SLAC National Accelerator Laboratory and Belle experiment at KEK. Subsequent precision studies by LHCb experiment, ATLAS, and CMS expanded the dataset used by the Particle Data Group and were highlighted at conferences like ICHEP and meetings of the American Physical Society. Historical reviews and Nobel recognitions involving Makoto Kobayashi and Toshihide Maskawa contextualize the broader significance attributed to anti-B meson research.
Category:Mesons