Tag: BPH
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The ETA meson’s latest rare secret
CMS observes the η meson decaying into two muons and two charged pions for the first time.
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When rare decays enter the precision era
One of the unique features of the weak interaction is its ability to transform one quark flavor into another.
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Where did all the antimatter go? CMS investigates using B mesons
The CMS experiment uses its largest sample of B mesons to date to perform a high-precision test of subtle differences between matter and antimatter.
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Estranged siblings? Observed meson decays are compatible with one bottomonium state, but without any hint of its partner
The CMS experiment reports the observation of a peaking structure in the Υ(1S)ϕ(1020) channel in proton-proton collisions at 13 TeV.
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Light mesons with a heavy impact
The CMS experiment reports the first observation of the rare decay of an eta meson to two muons and two electrons.
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Pushing the limits: rare four-muon decays of B mesons
CMS sets the world’s most stringent limits on B⁰ and B⁰ₛ decays into four muons.
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CMS gets acquainted with a family of all-charm tetraquarks
Upon close inspection, the tetraquark family members are consistent with tightly bound diquark pairs The CMS Collaboration has identified three extremely rare same-flavor teraquark states and determined, based on their spin-parity configuration, that they are consistent with a diquark-antidiquark model.
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B* mesons are excited to (finally) show up
For the first time ever, the excited states of three beauty mesons are fully reconstructed and their masses are measured directly, using data from the CMS experiment.
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Unveiling B Meson Production at CMS
The ratios of the B meson production fractions have been measured for the first time in the CMS experiment.
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Peeking inside the proton: the story of Z+ϒ
CMS discovers associated production of a Z boson and an ϒ meson.