Higgs discovery before LHC?
Conference
·
OSTI ID:781632
- Fermilab
The standard model (SM) of fundamental interactions, has been the successful theory over the last 25 years. The overall success of the SM in describing the elementary interactions, the discovery of gauge bosons at CERN in the eighties as well as the top discovery at Fermilab in 1995, strengthened the expectation that the Higgs mechanism is the one that gives mass to all particles. At the moment the Higgs particle is the only missing pieces of the puzzle. The sensitivity of parameters of the electroweak theory to the mass of the top quark and of the W boson has been exploited to provide limits on the mass of the Higgs particle (M{sub H}). Due to the logarithmic dependence of M{sub H} to the ratio of M{sub W}/M{sub top}, a small change in the central values translates into a large change in the limit on M{sub H}. At present (Spring 2001), the current 95% CL lower bound is 212 GeV/c{sup 2} while the upper limit from LEP experiments is 113.5 GeV/c{sup 2} with the additional hint of a possible signal at 115 GeV/c{sup 2}[1]. Due to its coupling Higgs decays into the heaviest possible pair of particles, therefore for M{sub H} below 130 GeV/c{sup 2}(low mass region) the most important channels are b or {tau} pairs, while for heavier masses, the branching fraction into vector boson pairs becomes dominant. A hadron collider provides excellent chances to discover the Higgs given that (in the low mass region) tagging of b-jets would be available. The tool became a reality at the Tevatron during the search for top and is now taken for granted in any experiment at hadron colliders.
- Research Organization:
- Fermi National Accelerator Lab., Batavia, IL (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC02-76CH03000
- OSTI ID:
- 781632
- Report Number(s):
- FERMILAB-Conf-01/092-E
- Country of Publication:
- United States
- Language:
- English
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