DZero continues search for a possible light Higgs

Jan 03, 2005
Distribution of the dijet invariant mass for W + 2b-tagged events

According to DOE Pulse, scientists of the DZero experiment at the Department of Energy's Fermilab have submitted results of the first Run II search for a light Higgs, hypothesized at 115 GeV/c**2. In this search, DZero looks for events where the W boson decays to leptons and the Higgs boson decays to a b-quark, anti b-quark pair.

Image: Distribution of the dijet invariant mass for W + 2b-tagged events: the 6 observed events (black circles) are compared to the simulated standard model contributions (cumulative histograms). The expectation for a 115 GeV Higgs boson from WH production is also shown (brown histogram). (Credit: DOE Pulse)

The real data unfortunately shows no evidence that this is the scenario. But this non-observation allows DZero to set new limits on the critical W-Higgs production rate, which can set limits on theoretical ideas outside the standard model. And it holds out some hope that the Tevatron might produce evidence of a light Higgs.

The DØ Experiment consists of a worldwide collaboration of scientists conducting research on the fundamental nature of matter. The experiment is located at the world's premier high-energy accelerator, the Tevatron Collider, at the Fermi National Accelerator Laboratory (Fermilab) in Batavia, Illinois, USA. The research is focused on precise studies of interactions of protons and antiprotons at the highest available energies. It involves an intense search for subatomic clues that reveal the character of the building blocks of the universe.

Source: DOE Pulse

Explore further: Experiment with speeding ions verifies relativistic time dilation to new level of precision

add to favorites email to friend print save as pdf

Related Stories

First joint result from LHC and Tevatron experiments

Mar 19, 2014

(Phys.org) —Scientists working on the world's leading particle collider experiments have joined forces, combined their data and produced the first joint result from Fermilab's Tevatron and CERN's Large ...

Scientists complete the top quark puzzle

Feb 24, 2014

Scientists on the CDF and DZero experiments at the U.S. Department of Energy's Fermi National Accelerator Laboratory have announced that they have found the final predicted way of creating a top quark, completing ...

Recommended for you

How Paramecium protozoa claw their way to the top

5 hours ago

The ability to swim upwards – towards the sun and food supplies – is vital for many aquatic microorganisms. Exactly how they are able to differentiate between above and below in often murky waters is ...

User comments : 1

Adjust slider to filter visible comments by rank

Display comments: newest first

jonnyboy
1 / 5 (2) Mar 12, 2009
This article is absurd. If I hypothesize, for example, that the sun is going to explode tomorrow and then find no proof of my own hypothesis. IT AINT SCIENCE!!!!!!!!!!!!!