OPERA observes the second tau neutrino

Jun 07, 2012

(Phys.org) -- The OPERA collaboration has announced yesterday at the Neutrino 2012 conference in Japan, the observation of their second neutrino tau interaction, after the first observation made in 2010.

In an official note the collaboration explains that "The was designed to search for the very rare and peculiar phenomenon of neutrino oscillations, according to which muon neutrinos along their path transform into a different type of neutrinos, the so-called .

The at , Geneva, produce an intense beam of muon neutrinos which is sent towards the Gran Sasso National Laboratory of INFN.

Thanks to their extremely rare interactions with matter, neutrinos arrive unperturbed at Gran Sasso after crossing 730 km of rock. The OPERA experimental apparatus located at Gran Sasso acts like a photographic camera with a mass of 1250 tons, capable of recording interactions of tau neutrinos, thus being able to demonstrate the phenomenon.

The experiment is taking data since 2008 and in 2010 the Collaboration reported the observation of a first tau neutrino. Since then, the experiment has collected more data, analyzing with micrometric accuracy several thousands of neutrino interactions.

At the Neutrino 2012 International Conference in Kyoto, Japan, on June 5th, the Collaboration just reported the observation of their second neutrino tau interaction. This new event is an important step towards the accomplishment of the final goal of the experiment."

OPERA is an experiment designed and realized by a group of 160 researchers from universities and scientific institutes in Belgium, Croatia, France, Germany, Israel, Italy, Japan, Korea, Russia, Tunisia, Switzerland, and Turkey.

Explore further: The hemihelix: Scientists discover a new shape using rubber bands (w/ video)

add to favorites email to friend print save as pdf

Related Stories

CERN neutrino project on target

Aug 16, 2005

Scientists at CERN announced the completion of the target assembly for the CERN neutrinos to Gran Sasso project, CNGS. On schedule for start-up in May 2006, CNGS will send a beam of neutrinos through the Earth to the Gran ...

Green light for the neutrino beam from Cern to Gran Sasso

Sep 12, 2006

The delivery of the neutrino beam (Cngs) from Cern and the beginning of a new generation of experiments were officially celebrated today at Infn (Italian National Institute for Nuclear Physics) National Laboratories of Gran ...

New results confirm standard neutrino theory

Feb 16, 2010

(PhysOrg.com) -- In its search for a better understanding of the mysterious neutrinos, a group of experimenters at DOE’s Fermi National Accelerator Laboratory has announced results that confirm the theory ...

Neutrinos change flavors while crossing Japan

Jun 15, 2011

By shooting a beam of neutrinos through a small slice of the Earth under Japan, physicists say they've caught the particles changing their stripes in new ways. These observations may one day help explain why the universe ...

Physicists: Did neutrinos break the speed of light?

Nov 23, 2011

(PhysOrg.com) -- The revolutionary news that an experiment measured particles traveling faster than the speed of light drew varied ages and backgrounds to a standing-room only physics department forum, "Faster ...

Recommended for you

Using antineutrinos to monitor nuclear reactors

2 hours ago

When monitoring nuclear reactors, the International Atomic Energy Agency has to rely on input given by the operators. In the future, antineutrino detectors may provide an additional option for monitoring. ...

Imaging turns a corner

7 hours ago

(Phys.org) —Scientists have developed a new microscope which enables a dramatically improved view of biological cells.

Mapping the road to quantum gravity

20 hours ago

The road uniting quantum field theory and general relativity – the two great theories of modern physics – has been impassable for 80 years. Could a tool from condensed matter physics finally help map ...

User comments : 0

More news stories

A 'quantum leap' in encryption technology

Toshiba Research Europe, BT, ADVA Optical Networking and the National Physical Laboratory (NPL), the UK's National Measurement Institute, today announced the first successful trial of Quantum Key Distribution ...

Phase transiting to a new quantum universe

(Phys.org) —Recent insight and discovery of a new class of quantum transition opens the way for a whole new subfield of materials physics and quantum technologies.

Bake your own droplet lens

A droplet of clear liquid can bend light, acting as a lens. Now, by exploiting this well-known phenomenon, researchers have developed a new process to create inexpensive high quality lenses that will cost ...

Using antineutrinos to monitor nuclear reactors

When monitoring nuclear reactors, the International Atomic Energy Agency has to rely on input given by the operators. In the future, antineutrino detectors may provide an additional option for monitoring. ...

Cell resiliency surprises scientists

New research shows that cells are more resilient in taking care of their DNA than scientists originally thought. Even when missing critical components, cells can adapt and make copies of their DNA in an alternative ...