Featured Research

from universities, journals, and other organizations

Tevatron experiments close in on favored Higgs mass range

Date:
July 21, 2011
Source:
DOE/Fermi National Accelerator Laboratory
Summary:
Experiments at the Department of Energy's Fermilab are close to reaching the critical sensitivity that is necessary to look for the existence of a light Higgs particle. Scientists from both the CDF and DZero collider experiments at Fermilab will present their new Higgs search results at the EPS High-Energy Physics conference, held in Grenoble, France, from July 21-27.

Experiments at the Department of Energy's Fermilab are close to reaching the critical sensitivity that is necessary to look for the existence of a light Higgs particle. Scientists from both the CDF and DZero collider experiments at Fermilab will present their new Higgs search results at the EPS High-Energy Physics conference, held in Grenoble, France, from July 21-27.

The Higgs particle, if it exists, most likely has a mass between 114-137 GeV/c2, about 100 times the mass of a proton. This predicted mass range is based on stringent constraints established by earlier measurements, including the highest precision measurements of the top quark and W boson masses, made by Tevatron experiments. If the Higgs particle does not exist, Fermilab's Tevatron experiments are on track to rule out this Higgs mass range in 2012.

If the Higgs particle does exist, then the Tevatron experiments may soon begin to find an excess of Higgs-like decay events. With the number of collisions recorded to date, the Tevatron experiments are currently unique in their ability to study the decays of Higgs particles into bottom quarks. This signature is crucial for understanding the nature and behavior of the Higgs particle.

"Both the DZero and CDF experiments have now analyzed about two-thirds of the data that we expect to have at the end of the Tevatron run on September 30," said Stefan Soldner-Rembold, co-spokesperson of the DZero experiment. "In the coming months, we will continue to improve our analysis methods and continue to analyze our full data sets. The search for the Higgs boson is entering its most exciting, final stage."

For the first time, the CDF and DZero collaborations have successfully applied well-established techniques used to search for the Higgs boson to observe extremely rare collisions that produce pairs of heavy bosons (WW or WZ) that decay into heavy quarks. This well-known process closely mimics the production of a W boson and a Higgs particle, with the Higgs decaying into a bottom quark and antiquark pair -- the main signature that both Tevatron experiments currently use to search for a Higgs particle. This is another milestone in a years-long quest by both experiments to observe signatures that are increasingly rare and similar to the Higgs particle.

"This specific type of decay has never been measured before, and it gives us great confidence that our analysis works as we expect, and that we really are on the doorsteps of the Higgs particle," said Giovanni Punzi, co-spokesperson for the CDF collaboration.

To obtain their latest Higgs search results, the CDF and DZero analysis groups separately sifted through more than 700,000 billion proton-antiproton collisions that the Tevatron has delivered to each experiment since 2001. After the two groups obtained their independent Higgs search results, they combined their results. Tevatron physicist Eric James will present the joint CDF-DZero search for the Higgs particle on Wednesday, July 27, at the EPS conference.


Story Source:

The above story is based on materials provided by DOE/Fermi National Accelerator Laboratory. Note: Materials may be edited for content and length.


Cite This Page:

DOE/Fermi National Accelerator Laboratory. "Tevatron experiments close in on favored Higgs mass range." ScienceDaily. ScienceDaily, 21 July 2011. <www.sciencedaily.com/releases/2011/07/110721134204.htm>.
DOE/Fermi National Accelerator Laboratory. (2011, July 21). Tevatron experiments close in on favored Higgs mass range. ScienceDaily. Retrieved April 23, 2014 from www.sciencedaily.com/releases/2011/07/110721134204.htm
DOE/Fermi National Accelerator Laboratory. "Tevatron experiments close in on favored Higgs mass range." ScienceDaily. www.sciencedaily.com/releases/2011/07/110721134204.htm (accessed April 23, 2014).

Share This



More Matter & Energy News

Wednesday, April 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Is North Korea Planning Nuclear Test #4?

Is North Korea Planning Nuclear Test #4?

Newsy (Apr. 22, 2014) South Korean officials say North Korea is preparing to conduct another nuclear test, but is Pyongyang just bluffing this time? Video provided by Newsy
Powered by NewsLook.com
China Falls for 4x4s at Beijing Auto Show

China Falls for 4x4s at Beijing Auto Show

AFP (Apr. 22, 2014) The urban 4x4 is the latest must-have for Chinese drivers, whose conversion to the cult of the SUV is the talking point of this year's Beijing auto show. Duration: 00:40 Video provided by AFP
Powered by NewsLook.com
Hagel Gets Preview of New High-Tech Projects

Hagel Gets Preview of New High-Tech Projects

AP (Apr. 22, 2014) Defense Secretary Chuck Hagel is given hands-on demonstrations Tuesday of some of the newest research from DARPA _ the military's Defense Advanced Research Projects Agency program. (April 22) Video provided by AP
Powered by NewsLook.com
Lytro Introduces 'Illum,' A Professional Light-Field Camera

Lytro Introduces 'Illum,' A Professional Light-Field Camera

Newsy (Apr. 22, 2014) The light-field photography engineers at Lytro unveiled their next innovation: a professional DSLR-like camera called "Illum." Video provided by Newsy
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