Featured Research

from universities, journals, and other organizations

Liquid Scintillator Neutrino Detector Strengthens Evidence For Neutrino Oscillations

Date:
December 5, 2001
Source:
Los Alamos National Laboratory
Summary:
A collaboration of university scientists and researchers working at Los Alamos National Laboratory has published the final paper from the Liquid Scintillator Neutrino Detector (LSND) experiment. The results, based on six years of data collection, strengthen previously published, but controversial LSND results and provide further evidence of neutrino oscillation and mass.

LOS ALAMOS, NM, - A collaboration of university scientists and researchers working at Los Alamos National Laboratory has published the final paper from the Liquid Scintillator Neutrino Detector (LSND) experiment. The results, based on six years of data collection, strengthen previously published, but controversial LSND results and provide further evidence of neutrino oscillation and mass.

The LSND data, collected from 1993 to 1998, suggest that muon anti-neutrinos oscillate into electron anti-neutrinos. Combined with other data on neutrino oscillations, the results indicate that neutrinos represent roughly one percent or more of the universe's total mass.

The LSND results, which will be published in Physical Review D on Dec. 1, are based on data collected at the Los Alamos Neutron Science Center accelerator. During the collection period from 1993-1998, LANSCE delivered 180 trillion-billion (180,000,000,000,000,000,000,000) protons to the LSND target, a tank filled with 167 tons of mineral oil (baby oil) and 14 pounds of organic scintillator. This oil/scintillator mixture allowed the detection of both Cerenkov light and scintillation light via 1220 light sensitive tubes and provided excellent particle identification.

Neutrino oscillations have been employed to explain the apparent deficit of solar electron-neutrinos and atmospheric muon-neutrinos. The solar and atmospheric experiments have been confirmed by other experiments, while the LSND remains uncomfirmed. An independent experiment is needed to prove whether the events observed by LSND are indeed due to neutrino oscillations. The MiniBooNE experiment, currently under construction at Fermilab, is designed to provide a definitive test of the LSND neutrino oscillation results, and if the results are verified, to make a precision measurements of the oscillation parameters.

Scientists find it difficult to explain the solar, atmospheric, and LSND results using only the three known neutrino types: the electron, muon, and tau neutrinos. This difficulty causes the LSND results to be controversial. It has been hypothesized that some unknown new phenomenon--such as a fourth 'sterile' neutrino with a much weaker interaction with matter than normal neutrinos or large extra dimensions with different neutrino masses--might explain the data. Such new phenomena would have an enormous impact on the standard model of particle physics and would have very broad implications for future research in the fields of nuclear physics, high-energy physics, and astrophysics.

###The LSND collaboration consists of physicists from the University of Alabama, University of California at Riverside, University of California at San Diego, University of California at Santa Barbara, Embry Riddle Aeronautical University, Indiana University, Los Alamos National Laboratory, Louisiana State University, Southern University, and Temple University.

Los Alamos National Laboratory is operated by the University of California for the U.S. Department of Energy's National Nuclear Security Administration.


Story Source:

The above story is based on materials provided by Los Alamos National Laboratory. Note: Materials may be edited for content and length.


Cite This Page:

Los Alamos National Laboratory. "Liquid Scintillator Neutrino Detector Strengthens Evidence For Neutrino Oscillations." ScienceDaily. ScienceDaily, 5 December 2001. <www.sciencedaily.com/releases/2001/12/011205065725.htm>.
Los Alamos National Laboratory. (2001, December 5). Liquid Scintillator Neutrino Detector Strengthens Evidence For Neutrino Oscillations. ScienceDaily. Retrieved October 20, 2014 from www.sciencedaily.com/releases/2001/12/011205065725.htm
Los Alamos National Laboratory. "Liquid Scintillator Neutrino Detector Strengthens Evidence For Neutrino Oscillations." ScienceDaily. www.sciencedaily.com/releases/2001/12/011205065725.htm (accessed October 20, 2014).

Share This



More Matter & Energy News

Monday, October 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Gulfstream G500, G600 Unveiling

Gulfstream G500, G600 Unveiling

Flying (Oct. 20, 2014) Watch Gulfstream's public launch of the G500 and G600 at their headquarters in Savannah, Ga., along with a surprise unveiling of the G500, which taxied up under its own power. Video provided by Flying
Powered by NewsLook.com
Japanese Scientists Unveil Floating 3D Projection

Japanese Scientists Unveil Floating 3D Projection

Reuters - Innovations Video Online (Oct. 20, 2014) Scientists in Tokyo have demonstrated what they say is the world's first 3D projection that floats in mid air. A laser that fires a pulse up to a thousand times a second superheats molecules in the air, creating a spark which can be guided to certain points in the air to shape what the human eye perceives as an image. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-Fuel Impala

Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-Fuel Impala

3BL Media (Oct. 20, 2014) Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-fuel Impala Video provided by 3BL
Powered by NewsLook.com
What We Know About Microsoft's Rumored Smartwatch

What We Know About Microsoft's Rumored Smartwatch

Newsy (Oct. 20, 2014) Microsoft will reportedly release a smartwatch that works across different mobile platforms, has a two-day battery life and tracks heart rate. 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:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

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