Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

CERN’s LHCb Experiment Takes Precision Physics to a New Level

30.08.2011
Results to be presented by CERN*’s LHCb experiment at the biennial Lepton-Photon conference in Mumbai, India on Saturday 27 August are becoming the most precise yet on particles called B mesons, which provide a way to investigate matter-antimatter asymmetry.

The LHCb experiment studies this phenomenon by observing the way B mesons decay into other particles. The new results reinforce earlier measurements from LHCb presented at last month’s European Physical Society conference in Grenoble, France, showing that the B meson decays so far measured by the collaboration are in full agreement with predictions from the Standard Model of particle physics, the theory physicists use to describe the behaviour of fundamental particles.

“This result shows that we’re now able to measure the finest details of the B meson system,” said LHCb spokesperson Pierluigi Campana, “which puts us right where we need to be to start finding cracks in the Standard Model, and explaining matter-antimatter asymmetry.”

Matter and antimatter are thought to have existed in equal amounts at the beginning of the universe, but as the universe expanded and cooled, an asymmetry developed between them, leaving a universe that appears to be composed entirely of matter. Heavy quarks provide a good place to investigate this phenomenon because the heavier the quark, the more ways it can decay, and all of these decays are described by the Standard Model. The Standard Model predicts matter-antimatter asymmetry, but at a level which is too small to explain the observed asymmetry in the Universe. Deviations from the predictions would bring an indication of new physics. B-quarks are produced copiously at the LHC, which makes them the particle of choice for studying matter-antimatter asymmetry in the laboratory. Quarks are never produced alone, but always travel in company: they are accompanied by another quark giving rise to the family of particles called B mesons. It is these that LHCb studies.

... more about:
»CERN »Fermilab »LHC »LHCb »Nuclear Research »Precision

Earlier in the year, experiments at Fermilab presented results that hinted at a divergence from the Standard Model. Since then, however, the LHCb experiment has surpassed the Fermilab experiments’ precision, and sees no such divergence.

“These results suggest that the devil is in the detail,” said Campana, “and we’ve reached the point where we’re getting right down into the details. It’s not the devil we expect to find there, though, but new hints of deviations from the Standard Model.”

LHCb has been able to reach this level of precision so early in the operational lifetime of the LHC thanks to the excellent performance of the LHC, and the way that LHCb scientists have worked with LHC engineers to optimize the amount of data collected by the experiment. Unlike the large general-purpose detectors, ATLAS and CMS, the LHCb detector has not been constructed to record data at the maximum rate the LHC can deliver. LHCb contains very sensitive elements close to the beam that can measure the very short tracks left by B mesons before they decay. Reconciling the need to protect these devices from possible beam damage with maximizing beam intensity is the challenge these engineers and scientists have overcome.

“Collaboration with the accelerator people has been fantastic,” said Campana, “It’s allowing us to collect data much faster than expected, and bringing us closer to being able to understand where the antimatter went.”

For more information:
http://www.quantumdiaries.org/2011/08/25/trying-to-crack-the-standard-model/
Contact details:
James Gillies, CERN spokesperson, +41 76 487 45 55
Follow CERN at:
• www.cern.ch
• http://twitter.com/cern/
• http://www.youtube.com/user/CERNTV
• http://www.quantumdiaries.org/
*CERN, the European Organization for Nuclear Research, is the world's leading laboratory for particle physics. It has its headquarters in Geneva. At present, its Member States are Austria, Belgium, Bulgaria, the Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Italy, the Netherlands, Norway, Poland, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. One candidate for accession: Romania.

India, Israel, Japan, the Russian Federation, the United States of America, Turkey, the European Commission and UNESCO have Observer status.

James Gillies | Newswise Science News
Further information:
http://www.cern.ch

Further reports about: CERN Fermilab LHC LHCb Nuclear Research Precision

More articles from Physics and Astronomy:

nachricht First chip-scale broadband optical system that can sense molecules in the mid-IR
24.05.2018 | Columbia University School of Engineering and Applied Science

nachricht Nuclear physicists leap into quantum computing with first simulations of atomic nucleus
24.05.2018 | DOE/Oak Ridge National Laboratory

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

When corals eat plastics

24.05.2018 | Ecology, The Environment and Conservation

Surgery involving ultrasound energy found to treat high blood pressure

24.05.2018 | Medical Engineering

First chip-scale broadband optical system that can sense molecules in the mid-IR

24.05.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>