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Six constituent quarks in any of several combinations could yield a colour charge of zero; for example a hexaquark might contain either six quarks, resembling two baryons bound together (a dibaryon), or three quarks and three antiquarks. [2] Once formed, dibaryons are predicted to be fairly stable by the standards of particle physics.
Exotic hadrons are subatomic particles composed of quarks and gluons, but which – unlike "well-known" hadrons such as protons, neutrons and mesons – consist of more than three valence quarks. By contrast, "ordinary" hadrons contain just two or three quarks. Hadrons with explicit valence gluon content would also be considered exotic. [1]
An example would be pentaquarks, consisting of four quarks and one antiquark (qqqqq̅). So far, the only observed exotic baryons are the pentaquarks P c (4380) +, P c (4450) + discovered in 2015, [1] P c (4312) + in 2019 [2] and P Λ ψs (4338) 0 in 2022 by the LHCb collaboration. [3]
The 6-2 defense consists of six defensive linemen, two linebackers, and three defensive backs (one safety, two corners). This was the primary defense in football, at all levels, during the single wing era (the 1930s), combining enough passing defense to handle the passing attacks of the day along with the ability to handle the power running ...
Every so often, a debate bubbles up around whether it makes sense for men to keep playing best-of-five-set matches at Wimbledon and other Grand Slam tournaments. Consider Novak Djokovic a staunch ...
Dan Campbell's gambles paid off. Detroit went for it on fourth down for a fifth time to set up Jake Bates' 35-yard field goal as time expired, Jared Goff threw three touchdown passes and the Lions ...
Quarks have fractional electric charge values – either (− 1 / 3 ) or (+ 2 / 3 ) times the elementary charge (e), depending on flavor. Up, charm, and top quarks (collectively referred to as up-type quarks) have a charge of + 2 / 3 e; down, strange, and bottom quarks (down-type quarks) have a charge of − 1 / 3 e.
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