نتایج جستجو برای: intermediumte boson mass
تعداد نتایج: 487081 فیلتر نتایج به سال:
In the framework of the Standard Model the mass of the physical Higgs boson is an arbitrary parameter. In this note we examine whether it is possible to determine the ratio of m H /M , where M denotes any other mass in the theory, such as the W or the Z-boson mass. We show that no such relation can be stable under renormalisation.
We study the potential of the TESLA linear collider operated at a center-of-mass energy of 500 to 1000 GeV for the measurement of the neutral Higgs boson properties within the framework of the MSSM. The process of associated Higgs boson production with subsequent decays of Higgs bosons into b-quark and τ -lepton pairs is considered. An integrated luminosity of 500 fb is assumed at each energy. ...
We study the coupling parameter dependence of the Higgs boson mass in a chirally invariant lattice Higgs-Yukawa model emulating the same Yukawa coupling structure as in the Higgs-fermion sector of the Standard Model. Eventually, the aim is to establish non-perturbative upper and lower Higgs boson mass bounds derived from first principles, in particular not relying on vacuum stability considerat...
The CDF collaboration recently reported a measurement of the $W$-bosos mass, $M_W$, showing large positive deviation from Standard Model (SM) prediction. question arises whether extensions SM exist that can accommodate such values, and what further phenomenological consequences arise this. A different type has been observed experimentally in searches for light Higgs bosons. CMS two local $\sim ...
We calculate renormalization constants ZH,w, the Higgs and W–boson mass and tadpole counterterms in the on–mass-shell renormalization scheme to two loops in the heavy–Higgs– boson limit mH ≫ MW . Explicit analytic formulae are presented for the two–loop integrals with masses, which are not known in the literature. As an application, the analytic expression for the two–loop leading correction to...
We revisit the exclusive signature e(μ)+ bb̄ in the associated production of the intermediate mass Higgs boson with a W boson. We show that it is feasible to use this signature to identify the Higgs boson in the lower intermediate mass region (90 to 130 GeV) at the LHC with reasonable acceptance cuts by assuming effective bottom-jet identification. We further demonstrate that the background can ...
A new scalar resonance, called the radion, with couplings to fermions and bosons similar to those of the Higgs boson, is predicted in the framework of Randall-Sundrum models, proposed solutions to the hierarchy problem with one extra dimension. An important distinction between the radion and the Higgs boson is that the radion would couple directly to gluon pairs, and in particular its decay pro...
We present a search for the production of a new heavy gauge boson W ′ that decays to a top quark and a bottom quark. We have analyzed 230 pb−1 of data collected with the DØ detector at the Fermilab Tevatron collider at a center-of-mass energy of 1.96 TeV. No significant excess of events above the standard model expectation is found in any region of the final state invariant mass distribution. W...
We report on a recent calculation of the two-loop virtual QCD corrections to the W boson pair production in the quark-anti-quark-annihilation channel in the limit where all kinematical invariants are large compared to the mass of the W boson. Our result is exact up to terms suppressed by powers of the W boson mass. The infrared pole structure is in agreement with the prediction of Catani’s gene...
The differences between the on-shell mass and width of the Higgs boson and their pole counterparts are evaluated in leading order. For a heavy Higgs boson, they are found to be sensitive functions of the gauge parameter and become numerically large over a class of gauges that includes the unitary gauge. For a light Higgs boson, the differences remain small in all gauges. The pinch-technique mas...
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