The top decays into a W boson
and a b quark and the Higgs decays further into for example two photons, four leptons, a b quark and an anti-b quark, or pairs of W or Z bosons or tau leptons.
Higgs bosons can decay in multiple ways; in one scenario, a Higgs transforms into a top quark or a W boson
, either of which would in turn immediately break up into two long-lived, detectable photons.
Washington, Mar 3 ( ANI ): Physicists including one of Indian origin have determined the world's most precise measurement of the mass of the W boson
, which is one of nature's elementary particles.
Through detailed and persistent explanations, the authors track the development in this field from the first theoretical proposal of the W boson
to today's consistent and repeatable mathematical applications.
In the last step, having sorted jets in [p.sub.T], several requirements are applied to find the best combination of subjets with two subjets giving the best W boson
invariant mass and the whole three subjets to be consistent with the top quark invariant mass.
Research objectives and contents The project is to measure the mass of the W boson
, the charged mediator of the weak force, and to study its couplings.
Although the W boson
was already known to physicists, identifying known particles is vital for calibration of the detectors like Atlas.
As an example, Turner points out the accepted theoretical claim that elementary particles known as the W boson
and the Z boson had no mass when the universe first exploded into being.
The lower-energy boundary was established by the Large Electron-Positron (LEP) collider at CERN in the 1990s, whereas the upper boundary is a softer limit established by indirect evidence, such as the masses of the top quark and the W boson
Instead, researchers must study the details of how a top quark decays into a bottom quark and a W boson
to deduce a value for this quantity.
It should be noted that one can look to single charged Higgs production in association with W boson
. This channel has been studied in [25-27] and shows that signal cross section is larger at muon colliders and is almost independent of the charged Higgs mass and increases with tan [beta].