Featured Research

from universities, journals, and other organizations

Physicists Closing In On Mysterious Missing Particle That Gives Matter Mass

Date:
January 19, 2007
Source:
University Of Toronto
Summary:
University of Toronto researchers are now closer to answering contemporary physics' most pressing question: where is the missing particle that gives matter mass, known as Higgs-boson? The breakthrough comes after researchers discovered that the mass of another subatomic particle -- the W boson -- is slightly heavier than previous measurements, pointing them in a new direction.

According to the Standard Model of particles and forces, the Higgs mechanism gives mass to particles. Measuring the mass of the top quark and the mass of the W boson, scientists can restrict the allowable mass range of the not-yet-observed Higgs boson.
Credit: Image courtesy of Fermilab

University of Toronto researchers are now closer to answering contemporary physics' most pressing question: where is the missing particle that gives matter mass, known as Higgs-boson? The breakthrough comes after researchers discovered that the mass of another subatomic particle -- the W boson -- is slightly heavier than previous measurements, pointing them in a new direction.

So far, the Higgs-boson only exists in mathematical formulas and has stumped physicists since it was theorized by Peter Higgs in 1964. It is the missing link that will complete the standard model of particle physics, which studies the basic elements of matter and radiation, including other observable subatomic particles such as quarks and leptons.

Working at the Department of Energy's Fermi National Accelerator Laboratory, the team of researchers made the world's most precise measurement of the mass of the W-boson and found that it is somewhat heavier than previously measured, which in turn lowers the target mass for the Higgs-boson.

"What happens is that the Higgs-boson interacts with other subatomic particles, causing drag -- the heavier the particle, the more drag the Higgs-boson applies," says Professor William Trischuk of the Department of Physics and team leader. "From precise measurements of the W-boson, we can then infer the mass of the Higgs-boson. The W-boson, being among the heaviest particle in the standard model, is the current limitation in being able to pin down the Higgs."

Trischuk predicts that if the Higgs-boson exists, researchers will find it in the next couple of years and the importance of the discovery cannot be overstated. "While the observation of a Higgs, at just the mass indicated by current precision measurements of the W mass might close the standard model, an inconsistency between the two would lead to the much more interesting prospect of starting us down the path to particle physics beyond the current paradigm."


Story Source:

The above story is based on materials provided by University Of Toronto. Note: Materials may be edited for content and length.


Cite This Page:

University Of Toronto. "Physicists Closing In On Mysterious Missing Particle That Gives Matter Mass." ScienceDaily. ScienceDaily, 19 January 2007. <www.sciencedaily.com/releases/2007/01/070119094628.htm>.
University Of Toronto. (2007, January 19). Physicists Closing In On Mysterious Missing Particle That Gives Matter Mass. ScienceDaily. Retrieved August 29, 2014 from www.sciencedaily.com/releases/2007/01/070119094628.htm
University Of Toronto. "Physicists Closing In On Mysterious Missing Particle That Gives Matter Mass." ScienceDaily. www.sciencedaily.com/releases/2007/01/070119094628.htm (accessed August 29, 2014).

Share This




More Matter & Energy News

Friday, August 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Australian Airlines Relax Phone Ban Too

Australian Airlines Relax Phone Ban Too

Reuters - Business Video Online (Aug. 26, 2014) Qantas and Virgin say passengers can use their smartphones and tablets throughout flights after a regulator relaxed a ban on electronic devices during take-off and landing. As Hayley Platt reports the move comes as the two domestic rivals are expected to post annual net losses later this week. Video provided by Reuters
Powered by NewsLook.com
Hurricane Marie Brings Big Waves to California Coast

Hurricane Marie Brings Big Waves to California Coast

Reuters - US Online Video (Aug. 26, 2014) Huge waves generated by Hurricane Marie hit the Southern California coast. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Chinese Researchers Might Be Creating Supersonic Submarine

Chinese Researchers Might Be Creating Supersonic Submarine

Newsy (Aug. 26, 2014) Chinese researchers have expanded on Cold War-era tech and are closer to building a submarine that could reach the speed of sound. Video provided by Newsy
Powered by NewsLook.com
Breakingviews: India Coal Strained by Supreme Court Ruling

Breakingviews: India Coal Strained by Supreme Court Ruling

Reuters - Business Video Online (Aug. 26, 2014) An acute coal shortage is likely to be aggravated as India's supreme court declared government coal allocations illegal, says Breakingviews' Peter Thal Larsen. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins