The W and Zbosons (together known as the weak bosons or, less specifically, the intermediate vector bosons) are the elementary particles that mediate the weak interaction; their symbols are W+, W−, and Z. The W bosons have a positive and negative electric charge of 1 elementary charge respectively and are each other's antiparticles. The Z boson is electrically neutral and is its own antiparticle. The three particles have a spin of 1, and the W bosons have a magnetic moment, while the Z has none. All three of these particles are very short-lived, with a half-life of about 6975300000000000000♠3×10−25s. Their discovery was a major success for what is now called the Standard Model of particle physics.
The Wbosons are named after the weak force. The physicistSteven Weinberg named the additional particle the "Zparticle", later giving the explanation that it was the last additional particle needed by the model – the Wbosons had already been named – and that it has zero electric charge.
W′ bosons often arise in models with an extra SU(2)gauge group. SU(2) × SU(2) is spontaneously broken to the diagonal subgroup SU(2)W which corresponds to the electroweak SU(2). More generally, we might have n copies of SU(2), which are then broken down to a diagonal SU(2)W. This gives rise to n2−1 W+′, W−′ and Z′ bosons. Such models might arise from quiver diagram, for example. In order for the W′ bosons to couple to weak isospin, the extra SU(2) and the Standard Model SU(2) must mix; one copy of SU(2) must break around the TeV scale (to get W′ bosons with a TeV mass) leaving a second SU(2) for the Standard Model. This happens in Little Higgs models that contain more than one copy of SU(2). Because the W′ comes from the breaking of an SU(2), it is generically accompanied by a Z′ boson of (almost) the same mass and with couplings related to the W′ couplings.
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Following up on the Higgs boson. The discovery of the Higgs boson in 2012 provided the last missing piece in the Standard Model of particle physics, one of science’s most successful theories.
Scientists believe that interactions between Higgs bosons could unlock insights into new physics ... Scientists claimed that the production of Higgs boson pairs can occur within the Standard Model itself ... The Higgs boson is a wave in that field.
) Those weeks in June 2012 were memorable. lots of emotion, lots of pressure, people working day and night ... This is an abstract of the document ... AttachmentsOriginal document Permalink. Disclaimer.
A puzzling discrepancy in measurements of the mass of the W+ and W– bosons, which are fundamental particles that carry the weak force, has been resolved by the Large Hadron Collider....
SAN FRANCISCO--(BUSINESS WIRE)-- #AI--Qualitia Boson - World’s first AI-Native Self-Healing Test Automation Solution For BFSILaunched on Salesforce AppExchange ... .
) A new, extremely precise measurement of the mass of the W boson, the particle whose discovery in 1983 earned Carlo Rubbia - a former student of the Scuola ...
This new measurement, which is a first for the CMS experiment, uses a new technique that makes it the most elaborate investigation of the W boson's mass to date ... "This has allowed us to free ourselves from the Z boson as our reference point.".
This new level of precision will allow scientists to tackle critical measurements, such as those involving the W, Z and Higgs boson, with enhanced accuracy. Scientists have just measured the mass of the W boson ... Bosons mediate these forces.
After an extensive analysis, the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider has announced a new measurement of the W boson’s mass, “one of nature’s force-carrying particles.”.
